Pilotes de moteur
Produits (261)
1336F-BRF100-AA-EN - 10HP 380-480VAC AC Drive
The Allen Bradley 1336F-BRF100-AA-EN is a 10HP, 7.5kW adjustable-frequency AC drive rated for 380–480V AC three-phase input and 10.8A constant-torque or 14.7A variable-torque input current. It is a 1336 PLUS II general-purpose drive in an IP20 (NEMA 1) wall-mounted enclosure, with a frame size identified as A4 in related listing data. The drive is intended for industrial AC motor control and supports constant- or variable-torque applications. An adjustable-frequency AC drive, or VFD, is a power-conversion device that varies motor speed and torque by controlling the frequency and voltage supplied to a three-phase AC motor. In the broader hierarchy, it belongs to industrial motor control and power-management equipment rather than a small-signal semiconductor. The 1336 PLUS II family is microprocessor based and uses adjustable-frequency PWM control to regulate motor behavior for pumps, fans, conveyors, mixers, and other industrial loads. Verified listings identify the target as a 10HP / 7.5kW unit with 380–480V AC operation, constant-torque current of 10.8A, variable-torque current of 14.7A, IP20 / NEMA 1 enclosure protection, English language documentation, and Allen Bradley branding. A related listing also identifies 16.4A constant-torque and 22.4A variable-torque current at the 380/480V rating, so the exact input-current interpretation should be confirmed against the relevant selection-table context before design approval. The drive's practical value is integration: motor control, adjustable output, digital programming, diagnostics, and protective functions are consolidated into a wall-mounted industrial unit. Rockwell literature identifies the 1336 PLUS II as an adjustable-frequency AC drive family, while the supplied manual excerpt states that the publication contains planning, installation, wiring, and diagnostic information. These functions make it suitable for retrofit and expansion of motor-control panels where a complete drive assembly is preferred over discrete power components. Before installation, confirm the motor rating, supply voltage, short-circuit protection, grounding, motor insulation, load type, acceleration and deceleration settings, and environmental conditions. The IP20 enclosure is not a hazardous-location rating and should not be assumed suitable for wet, dusty, explosive, or corrosive environments without additional enclosure protection. Use the manufacturer installation guidance and verify the complete catalog configuration before ordering. This page combines verified distributor and manufacturer-document data with application guidance and configuration cautions. It does not substitute for the manufacturer's selection guide, wiring diagram, user manual, or site-specific engineering review.
1336F-BRF75-AA-EN - 7.5 HP 460V AC Drive | Allen-Bradley
Rockwell Automation Allen-Bradley 1336F-BRF75-AA-EN is a 7.5 hp constant-torque adjustable-frequency AC drive rated for 380–480 V AC three-phase input or 513–620 V DC input, with a NEMA Type 1 enclosure. The product is associated with the 1336 PLUS II drive family and is intended for industrial motor-control applications requiring configurable speed regulation. An adjustable-frequency AC drive, commonly called a variable-frequency drive or VFD, is a power-management device that varies motor output frequency and voltage to control motor speed, torque, and process behavior. It sits between the industrial power supply and the motor, using power electronics and control firmware to manage startup, stopping, acceleration, deceleration, protection, and communication commands. The 1336 PLUS II family provides a common control interface and maintenance approach across a broad drive range. For this catalog number, the verified specifications identify 7.5 hp constant-torque capability, 380–480 V AC input, 513–620 V DC input, and NEMA Type 1 enclosure. Search results also describe the unit as an Allen-Bradley 1336 PLUS II adjustable-frequency drive. The available data does not establish every electrical, environmental, communication, or mechanical parameter, so those fields should be confirmed against the applicable Rockwell literature before procurement or installation. Typical uses include pumps, fans, compressors, conveyors, mixers, and other three-phase motor loads in industrial plants. The drive can be selected where speed regulation is needed instead of fixed-speed operation. Configuration details, terminal assignments, and diagnostics should be taken from the manufacturer documentation rather than inferred from an aftermarket listing. A critical procurement check is the complete catalog number. Rockwell drives are configured systems rather than simple interchangeable semiconductors, and the enclosure, language, control options, voltage class, and power rating must all be verified. The verified sources include a 1336 PLUS II technical document and user manual. This page consolidates verified source excerpts, application guidance, and replacement-screening limits. It does not substitute for the manufacturer technical data, installation instructions, or a site-specific motor and protection study.
1398-DDM-005-DN - 500W Ultra 100 Series Digital Servo Drive | Allen-Bradley
The Allen-Bradley 1398-DDM-005-DN is a Universal Drive from the legacy ULTRA 100 Series, rated at 500 watts with a 7.5 A peak output, designed for flexible multi-mode motion control in compact industrial systems. It supports torque, velocity, and position regulation through multiple analog, digital, and DeviceNet (DN suffix) command interfaces, operating on a single-phase 100-240V AC input at 50/60 Hz. A digital servo drive is a closed-loop amplifier that precisely regulates current, velocity, and position in a brushless or brush-type servo motor using real-time feedback from an encoder or resolver. As part of the broader motion control hierarchy, a servo drive sits between a motion controller (PLC or standalone indexer) and the motor, translating low-level command signals into high-bandwidth PWM output stages that drive the motor windings. The Universal Drive category denotes multi-mode operation - the same hardware can be commanded as a torque loop, velocity loop, or position loop, simplifying spare-parts stocking for machine builders. Key features of this drive include a Universal Drive architecture with DeviceNet network connectivity (the '-DN' suffix), 500 W continuous output power, 7.5 A peak current for acceleration transients, and digital torque/velocity/position loop closure. The unit is part of the ULTRA 100 Series' discontinued product family from Allen-Bradley (Rockwell Automation), with Discontinued-by-Manufacturer status announced 2010-07-29, though service continues through authorized repair channels. Programming is performed via the 1398-HMI-001 TouchPad or Ultra Master software running on a host PC. The internal topology combines a rectified single-phase front end, a DC bus capacitor bank, and a PWM inverter stage driving the motor windings. Encoder feedback is decoded for commutation and velocity/position loop closure. The DeviceNet interface (DN option) allows the drive to be commanded and monitored on a CAN-based industrial network, integrating with ControlLogix, SLC 500, and PLC-5 controllers using DeviceNet scanner modules. Typical applications for the 1398-DDM-005-DN include CNC machining retrofits, packaging lines, indexing tables, textile winding machines, and laboratory automation where a flexible, networked axis is required. In replacement scenarios the drive is widely used to maintain legacy equipment that originally shipped with this specific catalog number. When designing with this device, note the 500 W power ceiling - upgrading to higher-power axes (1 kW or more) requires the -009 or -019 models of the same family. The 7.5 A peak provides headroom for short acceleration bursts but is not a continuous rating; sizing should be done on RMS thermal current. This page synthesizes discontinued-lifecycle context, current channel availability, and drop-in catalog siblings not consolidated in the manufacturer datasheet, supporting engineers maintaining installed bases.
20D-DL2-CKE1 - PowerFlex 700S DriveLogix Control Kit | Allen-Bradley
The Allen-Bradley 20D-DL2-CKE1 is a PowerFlex 700S Phase II drive-control upgrade kit for industrial AC motor control, combining an expanded control cassette with DriveLogix 5730 programmable control. It is intended for retrofitting compatible PowerFlex 700S drives that originally used embedded DriveLogix functionality. The manufacturer identifies the product as discontinued effective June 30, 2021 and names 20D-DL2-CKE2 as its direct replacement. This drive-control upgrade kit belongs to the variable-frequency-drive and industrial-automation hierarchy. A VFD controls AC motor speed and torque through power-electronic switching, while an embedded programmable controller adds sequencing, diagnostics, process control, and communications functions. The 20D-DL2-CKE1 is therefore more than a basic drive module: it combines drive control, expanded cassette hardware, and DriveLogix 5730 logic within the PowerFlex 700S platform. Verified sources identify advanced programming, built-in diagnostics, and high-performance drive control as principal platform benefits. The included expanded cassette and DriveLogix processor support retrofit-compatible configurations. Marketing information also states that the kit includes an M5 hex nut wrench, Phillips screwdriver, and standard screwdriver, although installation procedures and torque requirements must be confirmed in the applicable Rockwell literature. The part is associated with general-purpose AC motor control and demanding industrial automation applications. Retrofit use requires matching the original PowerFlex 700S configuration, frame, backplane, connector arrangement, and control architecture. It should not be assumed interchangeable with the standard 20D-P2-CKE1 cassette or the 20D-DL1-CKE1 control kit because those products do not provide the same DriveLogix configuration. Rockwell lists 20D-DL2-CKE2 as a direct replacement, but that replacement was subsequently discontinued on April 3, 2025, with no replacement applicable according to the provided product-page result. Maintenance decisions should therefore evaluate current controller and drive migration options rather than assuming another active drop-in kit remains available. This page distinguishes manufacturer-verified identity and lifecycle facts from unprovided electrical ratings, dimensions, connector pinouts, certifications, and installation parameters. Those missing details are deliberately not inferred. Before procurement or installation, request a quotation for condition and traceability, verify the host drive catalog string, and consult Rockwell selection guidance and user documentation.
22B-D6P0N104 - 3 HP 480 VAC PowerFlex 40 AC Drive
The Allen-Bradley 22B-D6P0N104 is a PowerFlex 40 adjustable-frequency AC drive rated for 6 A output, 2.2 kW (3 HP), and 480 VAC three-phase operation in a Frame Size B, IP20 open enclosure. It includes an LED display, digital keypad, and RS485 connectivity. The catalog number also identifies an unfiltered model with a brake IGBT. An adjustable-frequency AC drive is a motor-control device that varies AC motor speed and torque by controlling the frequency and voltage supplied from a fixed-voltage input. Within the industrial motor-drive hierarchy, it belongs to adjustable-speed drive, power-conversion equipment, and motor-control systems. It is used when process speed must be regulated rather than left at the motor’s fixed supply frequency. Key verified features include a 480 VAC, three-phase input rating, 6 A output-current class, 2.2 kW (3 HP) power rating, Frame Size B construction, and IP20 open-panel mounting. The fixed keypad provides local display and control, while RS485 supports serial integration. The product-search data identifies no CE-compliant filter, while an expanded catalog interpretation identifies the brake-IGBT configuration code. The PowerFlex 40 platform uses sensorless vector control according to distributor product information. That control approach can support general-purpose industrial motor applications without requiring a separate feedback encoder. Control-law behavior, acceleration settings, motor data, protective functions, and terminal details must nevertheless be verified in the applicable PowerFlex 40 manuals before commissioning. Typical uses include conveyors, pumps, fans, mixers, machine auxiliaries, and other fixed 480 VAC three-phase motor loads within the verified 6 A and 2.2 kW rating. The open IP20 enclosure makes the unit suitable for a protected indoor panel environment, not an unprotected wet or dusty location. Adequate panel protection, grounding, motor protection, and local safety isolation remain essential. Commissioning should begin with the manufacturer’s model-specific document set, followed by motor-nameplate verification, parameter configuration, and a controlled no-load test. Because the source identifies this model as discontinued, inspect its condition, retained accessories, warranty status, and parameter compatibility before investment in a new installation. This page consolidates the verified manufacturer identity, catalog-code characteristics, distributor listing data, lifecycle information, and replacement lead while clearly separating verified facts from parameters that still require manual confirmation.
6EDL7141XUMA1 - 60V 3-Phase BLDC Gate Driver IC | Infineon
The Infineon 6EDL7141XUMA1 is a three-phase, half-bridge-based smart gate driver IC designed for battery-supplied BLDC and PMSM motor control. It integrates three half-bridge drivers capable of sourcing/sinking 1.5 A peak gate current, operates from a 5.5 V to 60 V recommended supply, supports programmable driving voltage, and is housed in a PG-VQFN-48-78 power package with exposed pad. The device includes three current-sense amplifiers for bi-directional low-side current sensing with programmable gain and supports R_DSON sensing through internal phase-node connections. A three-phase gate driver IC (sometimes called a "smart gate driver" or "motor driver front end") sits between an MCU and the three half-bridges of N-channel MOSFETs that commutate a BLDC motor stator. By placing all six gate-drive channels, charge-pump bootstrap supplies, dead-time control, current-sense conditioning and protection logic into one IC, the designer replaces ~30 discrete parts and gains digital SPI configurability. The 6EDL7141 belongs to Infineon's MOTIX family and targets battery-powered motion control where PCB area, efficiency and firmware configurability are paramount. Key differentiating features include 1.5 A peak source/sink gate-drive current with programmable drive voltage, integrated 3.3 V / 5 V-compatible current-sense amplifiers with low noise and fast settling time, bi-directional low-side current sensing with programmable gain, R_DSON-based phase-current sensing via internal connections, SPI-configurable parameters, integrated charge pump and bootstrap diodes, and built-in protection (overcurrent, undervoltage, gate-fault detection). The PG-VQFN-48-78 package combines a low-Rth power pad with compact outline. The architecture uses three independent high-side/low-side channels with integrated bootstrap diodes and a charge pump to drive the high-side N-MOSFETs at 100% duty cycle. Internal logic provides configurable dead-time, adaptive shoot-through protection, and a SPI interface exposing >50 parameters (gain, blanking time, current-trigger thresholds, gate-drive strength, fault masks). Typical applications include cordless power tools (drills, impact drivers, saws), battery gardening tools (hedge trimmers, leaf blowers), automated guided vehicles and robotics, e-bike and e-scooter traction inverters, drone ESCs, and home appliances with BLDC motors (vacuum cleaners, washing-machine drum drives, range-hood fans). When designing with this part, allocate the bottom exposed pad to at least 1 sq-inch of copper with thermal vias to dissipate charge-pump and gate-driver losses, and place the bootstrap capacitors (typically 100 nF ceramic) as close as possible to the BST pins. Configure the SPI registers at startup before enabling the outputs - the device will not drive if the digital core is uninitialized. This page synthesizes distributor pricing (DigiKey/Mouser), SPI-register-aware drop-in alternatives within Infineon's MOTIX 6EDL714x family, and practical design notes not consolidated in the manufacturer datasheet.
A3938SLDT - 50V Three-Phase BLDC MOSFET Controller | Allegro
The Allegro MicroSystems A3938SLDT is a three-phase brushless DC (BLDC) motor controller and high-current gate driver that drives external N-channel power MOSFETs in motor supply rails up to 50 V. Packaged in a 38-pin TSSOP with exposed thermal pad, the A3938SLDT integrates a bootstrapped high-side driver architecture that minimizes external component count and supports 100% duty cycle high-side operation. It is intended for brushless DC motor commutation in industrial drives, automotive auxiliary motors, and motion-control subsystems. A three-phase brushless DC motor controller is a mixed-signal motor-driver IC that converts low-power logic-level PWM/ENABLE inputs from an MCU into the six timed high-side/low-side gate-drive signals that commutate a three-phase MOSFET bridge. Within the broader taxonomy, the A3938SLDT sits in the motor-driver / gate-driver / power-management-IC hierarchy and is typically used between a microcontroller and the discrete N-channel MOSFET half-bridge output stage. Key features of the A3938SLDT include logic-level inputs compatible with 3.3 V / 5 V MCUs, built-in bootstrap diodes and management circuitry for the high-side supply, programmable dead time to prevent shoot-through, undervoltage lockout (UVLO) for both the logic and gate-drive rails, and thermal shutdown protection. The exposed thermal pad on the 38-pin TSSOP package lowers junction-to-board thermal impedance for sustained high-frequency switching at high motor currents. The A3938SLDT architecture combines a CMOS control logic core with bipolar gate-drive output stages capable of sourcing/sinking the gate charge of large N-channel devices at switching frequencies typically in the 20-50 kHz range. Internal charge-pump support and bootstrap refresh logic maintain proper high-side VGS during extended PWM-off periods, allowing reliable 100% duty-cycle operation in servo-style closed-loop drives. Typical applications include three-phase BLDC spindle and fan motors, e-bike and e-scooter traction drives, HVAC blower motors, robotic motion-blade controllers, power-tool motor controllers, and industrial pump drives. The wide motor supply range supports both 12 V/24 V battery-powered and 36-50 V sub-serial-bus industrial rails. When designing with the A3938SLDT, pay careful attention to PCB layout: keep the high-current phase traces short and wide, place bootstrap capacitors close to their respective BSTx pins, and stitch the exposed pad to a large ground copper pour for heat-sinking. Avoid switching the bridge near the controller's logic supply during power-down sequencing, and always honor the dead-time and UVLO thresholds defined in the manufacturer datasheet to prevent MOSFET shoot-through. This page synthesizes distributor pricing, drop-in alternative part numbers, and practical PCB-layout design notes not consolidated in the manufacturer datasheet, helping engineers select and apply the A3938SLDT with confidence.
A3938SLDTR-T - 3-Phase BLDC MOSFET Controller, 50V | Allegro
The Allegro MicroSystems A3938SLDTR-T is a three-phase brushless DC motor controller housed in a 38-pin TSSOP package, supporting motor supply voltages up to 50 V and delivering high-current gate drive for external N-channel power MOSFETs. Key headline parameters: 50 V motor supply, three-phase PWM control, integrated bootstrapped high-side drivers, and synchronous rectification. What is a three-phase BLDC motor controller? A BLDC (brushless DC) controller is a power management IC that converts DC bus voltage into the six-step or sinusoidal commutation signals required by a three-phase stator. It sits in the broader power management hierarchy as: gate driver -> motor controller/driver -> power management IC -> semiconductor. By integrating bootstrap diodes for the floating high-side supply, the A3938 eliminates the discrete charge-pump circuitry normally required. Key features include low-side synchronous rectification for reduced body-diode losses, adjustable dead time to prevent cross-conduction shoot-through, power MOSFET protection with fault reporting, and a wide operating voltage range from 18 V to 50 V. The PWM input accepts logic-level signals from a microcontroller or DSP. The 38-pin TSSOP package provides a manageable footprint while supporting the gate-drive current needed for high-current MOSFET bridges. Technically, the A3938 uses a bootstrapped high-side driver topology where an internal diode and external capacitor create a floating supply above each phase voltage. Synchronous rectification turns ON the low-side switch during the off-time of the complementary switch, eliminating conduction through the MOSFET body diode and reducing switching losses. Dead time is programmable to balance shoot-through protection against body-diode conduction. Typical applications include industrial BLDC servo drives, three-phase fans and pumps, e-bike and scooter traction controllers, CNC spindle drives, and robotic actuators. The 50 V ceiling also suits 36 V battery platforms and 48 V telecom / mild-hybrid auxiliary systems. When designing with this device, ensure bootstrap capacitors are sized for the high-side switching frequency and that adequate bulk capacitance sits at the motor supply pins to absorb back-EMF transients. Verify thermal performance with the actual MOSFET gate charge and switching frequency, since the A3938 itself only dissipates the gate-drive power, while the external MOSFETs handle the bulk of motor power loss. This page synthesizes distributor stock data, drop-in compatible alternatives, and design considerations not collected in the manufacturer datasheet.
A3941KLPTR-T - 50V Full-Bridge MOSFET Driver | Allegro | Automotive
The Allegro MicroSystems A3941KLPTR-T is an automotive-grade full-bridge MOSFET driver designed to control external N-channel power MOSFETs in high-current inductive loads such as brush DC motors, solenoids, and actuators. The device operates from a supply range of 5.5 V to 50 V, integrates a charge-pump regulator that delivers greater than 10 V of gate drive even when the battery drops to 7 V, and provides bootstrap capacitors to drive the high-side N-FETs above the phase voltage. Housed in a 28-pin TSSOP-EP package with an exposed thermal pad, the A3941KLPTR-T supports PWM switching up to the audio band, fault diagnostics, and synchronous rectification to minimize dissipation. A full-bridge MOSFET driver is a half-H or full-H control IC that translates low-current logic-level direction and PWM commands into high-current gate signals capable of slewing large power MOSFET gates at the high dV/dt rates typical of 12 V and 24 V automotive buses. Full-bridge drivers sit within the broader hierarchy of motor control ICs -> brushed DC drivers -> gate drivers -> power management semiconductors. By moving the power-MOSFET selection to external discretes, full-bridge controllers let designers optimize RDS(on), current rating, and thermal dissipation for the specific motor, while the IC handles timing, dead-time, charge-pump generation, and fault protection. Key features of the A3941KLPTR-T include a wide 5.5 V to 50 V supply range, integrated charge pump that maintains full >10 V gate drive down to 7 V VBAT, 100% duty-cycle bootstrap-capable high-side drive, programmable dead time, internal 5 V regulator for logic supply, diagnostics output, and protection against short-to-ground, short-to-battery, and over-temperature. Synchronous rectification switching minimizes body-diode conduction losses during PWM-freewheeling. The TSSOP-EP package exposes the die for a low theta_JA conduction path to PCB copper. Typical applications include automotive HVAC blowers, fuel pumps, water pumps, oil pumps, engine cooling fans, and electric power steering auxiliary motors. The high current gate drive also suits industrial brush DC drives, AGV traction motors up to several hundred watts, and 24 V solenoid drivers. Diagnostic feedback enables ISO 26262 functional-safety system designs in body and chassis ECUs. When designing with the A3941KLPTR-T, ensure adequate PCB copper area beneath the exposed pad to keep junction temperature within safe limits. Place bootstrap capacitors as close as possible to their respective BST pins and use 100 nF ceramic bypass on VREG and V5. The PWML/PWMH logic inputs allow independent control of each half-bridge, enabling forward, reverse, brake, and coast modes with a single direction bit.
A3967SLBTR-T - 30V/±750mA Microstepping Stepper Driver | Allegro
The Allegro MicroSystems A3967SLBTR-T is a complete microstepping bipolar stepper motor driver with integrated translator, delivering ±750 mA output drive capability at up to 30 V from a 24-pin SOIC (SLB) package. It supports full-, half-, quarter-, and eighth-step modes through an external step input, eliminating the requirement for a complex microcontroller-controlled indexer. Logic supply operates from 3 V to 5.5 V, compatible with 3.3 V and 5 V MCUs without level shifters. A microstepping driver with translator is a dedicated mixed-signal IC that converts step and direction pulses into phase-current waveforms that approximate sine-cosine commutation. Within the broader motor-driver hierarchy, the A3967 sits between simple full-/half-step controllers and more advanced closed-loop microstepping DSP controllers; it is a member of the bipolar stepper driver family within the larger power management and motion control IC category. Built-in translator logic and adaptive current decay are key differentiators versus raw H-bridge drivers. Key features include a Satlington® synchronous-rectified sink driver topology, automatic current-decay mode detection and selection (mixed, fast, slow), internal PWM current control with fixed off-time regulation, and ±750 mA continuous per-phase output. The 24-SOIC package provides a thermal resistance suitable for surface-mount designs at moderate power levels and exposes the logic supply, motor supply, phase outputs, and decay-mode configuration pins on a standard JEDEC-compliant land. The A3967 architecture combines a CMOS translator state machine, dual H-bridge DMOS output stages, and a fixed off-time current regulator. The translator accepts STEP and DIR inputs and sequentially energizes the phase coils in microstep increments, while the internal DAC generates sinusoidal reference levels. Automatic current-decay mode selection reduces ripple by choosing slow, fast, or mixed decay based on operating conditions, which minimizes audible motor noise and torque ripple. Typical applications include 3D printer axis drives, CNC mill stepper axes, camera pan-tilt mechanisms, textile mill automation, and office automation equipment such as paper-handling in printers and scanners. The wide 4.75 V to 30 V motor supply range accommodates both 12 V and 24 V bus systems commonly used in industrial motion control. When designing with the A3967, ensure that the logic supply (VCC) is decoupled with a 0.1 µF ceramic placed within 5 mm of the VCC pin, and add a bulk capacitor of at least 47 µF on the motor supply (VM). The ROSENSE resistor should be selected to set the peak phase current using the datasheet formula ITRIP = VREF / (8 × RSENSE), and unused logic inputs must not be left floating.
A3977SLPTR-T - 35V/±2.5A Microstepping DMOS Driver | Allegro MicroSystems
The Allegro MicroSystems A3977SLPTR-T is a complete microstepping DMOS motor driver with a built-in translator, designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes. Housed in a 28-pin TSSOP-EP (exposed pad) package, the part delivers an output drive capability of 35 V at ±2.5 A per phase, and is built around two all-N-channel DMOS full H-bridges with 450 mOhm (source) and 360 mOhm (sink) typical rDS(on). A microstepping driver with translator is an integrated circuit that combines a step/direction interface decoder with dual H-bridge power stages, allowing a host microcontroller to position a bipolar stepper motor at sub-full-step resolutions using only STEP and DIRECTION logic lines, while the IC handles phase sequencing, current chopping, and decay-mode selection internally. Key features include a fixed off-time PWM current regulator capable of slow-, fast-, and mixed-decay modes (with automatic current-decay mode detection/selection), 3 V to 5.5 V logic supply, 8 V to 35 V motor supply, sync-rectified internal synchronous rectification for lower power dissipation, and a low-power sleep mode. The exposed thermal pad (EP) on the 28-TSSOP package provides a low thermal resistance path to PCB copper, supporting continuous ±2.5 A bipolar operation. Internally the device uses an integrated DAC-driven current reference, an automatic current-decay state machine that selects slow/fast/mixed decay based on the present PWM pulse width, and synchronous rectification that turns on the low-side DMOS during the current decay portion of each chopping cycle. This combination yields low dissipation at high chopping frequencies and smooth torque at low stepping rates. Typical applications include bipolar stepper motors in printers, scanners, plotters, factory automation XY stages, medical fluid-handling pumps, and small CNC machines. The 35 V / ±2.5 A envelope and TSSOP-EP footprint also suit 3D-printer axis drives where space is constrained but bipolar torque is required. When designing with the A3977SLPTR-T, pay particular attention to the exposed-pad soldering - it must be soldered to a sufficiently large copper pour (typically 1 sq inch minimum on each layer) to keep junction temperature within the -20 C to +85 C operating range. Decay-mode programming through the PFD/PFDREF pins and the OSC timing capacitor value directly affects audible noise, current ripple, and torque ripple, and should be tuned per motor.
A3982SLB-T - 35V, ±2A Bipolar Stepper Motor Driver | Allegro
The Allegro MicroSystems A3982SLB-T is a complete DMOS bipolar stepper motor driver with built-in translator, housed in a 24-pin SOIC Wide (300 mil) package. According to the Allegro datasheet, it is designed to operate bipolar stepper motors in full- and half-step modes, with an output drive capacity of up to 35 V and ±2 A per phase. The integrated translator eliminates the need for an external indexer microcontroller sequence, allowing simple step-and-direction control from a host MCU. A stepper motor driver is an integrated power stage that converts low-level logic pulses into precisely commutated full-bridge currents through two motor windings. Within the broader power management hierarchy, this device sits inside the Motor Drivers sub-category of Power Management ICs. By integrating dual H-bridges, current-sense comparators, and a translator, the A3982SLB-T replaces what would otherwise be a discrete FET bridge plus op-amp sense circuit plus FPGA timing logic, shrinking BOM count and freeing board area. Key features include a fixed off-time PWM current regulator, selectable Slow or Mixed decay modes, synchronous rectification for lower power dissipation, and internal crossover current protection. The logic inputs are 3.3 V and 5 V compatible, simplifying connection to common microcontrollers. Internal thermal shutdown and under-voltage lockout safeguard the DMOS outputs during fault conditions. The A3982 uses a BCDMOS process that pairs bipolar precision analog blocks with DMOS output power stages, achieving low on-resistance around 0.5 ohm per leg at full scale and fast 35 V switching transitions. The fixed off-time current chopping regulator maintains ±5% torque accuracy by comparing sense-resistor voltage to an internal DAC-controlled reference. Typical applications include textile and sewing machines, printers, scanners, small CNC routers, and automated teller machines. Industrial designers favor this driver for 24 V bus stepper rails up to 2 A per phase. When laying out the PCB, keep the high-current motor traces short and use a low-ESR supply bypass capacitor rated for the full motor stall current.
A3982SLBTR-T - 35V/±2A DMOS Stepper Motor Driver | Allegro
The Allegro MicroSystems A3982SLBTR-T is a complete DMOS stepper motor driver with a built-in translator, delivering up to 35 V and ±2 A output drive capacity in a 24-pin SOIC (SLB) package with exposed thermal pad for tape-and-reel shipping. What is a stepper motor driver? A stepper motor driver is a specialized power-management IC that sits between a low-current microcontroller and a bipolar stepper motor, translating logic-level step/direction pulses into the high-current dual-H-bridge sequences required to commutate the motor windings. The A3982SLBTR-T belongs to the motor-driver sub-family of the broader motor-control/ignition controller category and includes an integrated translator so the host MCU does not need to compute phase tables. Key features include a 3 V to 5.5 V logic supply, an 8 V to 35 V motor supply range, synchronous rectification through low-RDS(on) DMOS outputs (370 mOhm typical), automatic current-decay mode detection that selects Slow, Mixed, or Fast decay, and a fixed off-time PWM current regulator. The integrated translator accepts STEP and DIR inputs and supports full-step and half-step operation. The device uses a dual DMOS full-bridge architecture with internal charge-pump gate drive for the high-side N-FETs, plus crossover protection and thermal shutdown. Synchronous rectification reduces power dissipation versus diode-based designs, allowing the SOIC-24 package to deliver 2 A continuous per phase without an external heatsink in moderate-temperature environments. Typical applications include bipolar stepper motors in 3D printers, CNC routers, textile machinery, label printers, and office automation equipment. The translator interface and built-in current control make it especially attractive in designs where the host lacks real-time motor-control capability. When designing with the A3982SLBTR-T, observe the motor-supply decoupling guidance from the datasheet and route the high-current loop area as small as possible. The exposed thermal pad must be soldered to a copper pour to achieve the rated thermal performance. This page combines distributor pricing, drop-in alternatives, and practical design guidance not consolidated in the manufacturer datasheet.
A4911KJPTR-T - 3-Phase BLDC MOSFET Gate Driver ASIL | Allegro
The Allegro MicroSystems A4911KJPTR-T is an N-channel power MOSFET gate driver designed for three-phase brushless DC (BLDC) motor control in safety-critical automotive applications, housed in a 48-pin LQFP-EP (7x7 mm) package. The device drives six N-MOSFETs in a three-phase bridge arrangement, delivers gate drive currents up to 1 A source/sink, and includes an SPI-configurable interface with diagnostic feedback and three integrated current-sense amplifiers. Functional-safety features target ASIL compliance for ISO 26262 systems, with built-in self-test, watchdog, and detailed fault reporting. Wide supply ranges (VBB up to 50 V, VREG 5 V/3.3 V) support 12 V and 24 V automotive rails, and logic inputs accept 3.3 V or 5 V MCU signals. A three-phase MOSFET gate driver (also called a BLDC pre-driver or three-phase FET driver) is a semiconductor device that translates low-power PWM commands into high-current gate signals that switch the six N-channel MOSFETs forming a three-phase inverter bridge. Within the broader power management IC taxonomy, three-phase gate drivers sit below motor-driver SoCs and above discrete gate-driver ICs, enabling microcontrollers to safely control high-current BLDC, PMSM, and synchronous reluctance motors used in electric power steering, oil/water pumps, fans, and traction inverters. Three integrated current-sense amplifiers reduce external op-amp count and improve noise immunity for field-oriented control (FOC) loops. Key differentiating features of the A4911 include integrated charge pump for 100% duty-cycle high-side drive, programmable dead time, three differential current-sense amps with adjustable gain, SPI diagnostics, and ASIL-oriented safety mechanisms. These features eliminate the bootstrap diodes and discrete sense circuitry that competing solutions need, shrinking BOM area on the motor-control PCB. The device's architecture combines bootstrap-derived high-side supplies with a regulated low-side supply, programmable cross-conduction protection, and a 16-bit SPI register set for configuring gate drive strength, blanking, and fault masks. The integrated sense amplifiers support low-side shunt resistors with a programmable gain range, enabling direct FOC current measurement without external instrumentation amps. Typical applications include automotive electric power steering (EPS), electric coolant and oil pumps, HVAC blowers, engine cooling fans, e-bike drivetrains, and small traction inverters. The ASIL-oriented diagnostics make the part well suited to chassis-domain ECUs where functional safety is mandatory. A critical design consideration is that the LQFP-EP exposed pad must be soldered to a sufficiently large copper pour (≥1 sq inch) to keep junction temperature within limits when driving large gate charges at high PWM rates. The bootstrap capacitors must be sized for the worst-case high-side on-time; undersized capacitors cause VGS droop and R_DS(on) increase. This page synthesizes distributor pricing, drop-in alternatives (including the pin-compatible -1A variant), and practical design notes that complement the manufacturer's datasheet and typical application schematic.
A4952ELYTR-T - 40V Full-Bridge DMOS PWM Motor Driver | Allegro
The Allegro MicroSystems A4952ELYTR-T is a full-bridge DMOS PWM motor driver designed for pulse width modulated control of DC motors, capable of peak output currents of ±2 A and operating voltages up to 40 V, housed in a 10-pin MSOP-EP package with exposed thermal pad. The device integrates four low-RDS(on) DMOS output switches that form an H-bridge topology, eliminating the need for external power transistors in brushed DC motor applications. The A4952ELYTR-T accepts industry-standard TTL/CMOS logic inputs for direction and enable control, allowing direct interface with microcontrollers, FPGAs, or discrete logic gates. The package is supplied on tape and reel with -T suffix, intended for high-volume surface-mount assembly. A full-bridge motor driver, also known as an H-bridge, is a four-switch power stage that allows bidirectional current flow through a DC motor winding. By controlling the diagonal pairs of switches, the motor can be driven forward, reverse, or dynamically braked. DMOS (double-diffused MOS) output transistors provide lower on-resistance and faster switching than equivalent bipolar drivers, improving efficiency and reducing thermal dissipation at the same current level. Full-bridge PWM motor drivers sit within the broader hierarchy of motor driver ICs -> power management ICs -> integrated circuits. Key features include integrated overcurrent protection (OCP), motor short-to-ground protection, motor short-to-battery protection, motor lead short protection, low-power standby mode for battery conservation, and adjustable PWM current limiting through an external sense resistor. Synchronous rectification (active freewheeling) reduces power dissipation during the PWM off-time by keeping the low-side FET active rather than relying on the body diode, which directly improves efficiency at high PWM frequencies and high currents. The A4952 and its companion A4953 share an identical datasheet and differ only in their current-limit trip level: the A4952 is set at ±2 A and the A4953 at ±1.5 A for designers who need a tighter thermal envelope. Internal logic prevents cross-conduction (shoot-through) by inserting dead time between high-side and low-side switch transitions on each half-bridge, a critical protection in PWM-driven H-bridge designs. Typical applications include brushed DC motor control in consumer appliances, robotics actuators, solenoid and valve drivers, small HVAC damper actuators, battery-powered power tools, and two-fan or two-motor control boards in industrial equipment. Designers in 12 V and 24 V lead-acid or multi-cell Li-ion systems benefit from the 40 V absolute maximum rating and the wide operating voltage range. When designing with the A4952ELYTR-T, ensure the exposed thermal pad is soldered to a sufficiently large copper pour to keep junction temperature within the datasheet's 150 °C absolute maximum. The PWM frequency should be selected between 1 kHz and 50 kHz to balance audible noise against switching losses; higher PWM frequencies demand stronger gate drive and may require RC snubbers on motor terminals to suppress voltage ringing. This page synthesizes distributor pricing from DigiKey and Arrow, drop-in and functional alternatives, and design notes not found in the manufacturer datasheet alone.
A4956GLPTR-T - 50V Full-Bridge PWM Gate Driver | Allegro | Brushed DC Motor
The Allegro MicroSystems A4956GLPTR-T is a full-bridge PWM gate driver designed for pulse-width-modulated (PWM) control of brushed DC motors, rated for 50 V operation and packaged in a 20-pin TSSOP-EP (LP) with exposed thermal pad. It drives an all N-channel external MOSFET bridge with a single logic input, providing high-side and low-side gate drive through an integrated charge pump. Key specifications include 5.5 V to 50 V supply range, integrated charge pump for 100% duty cycle high-side drive, and built-in protection features for robust motor control designs. A gate driver is a power management IC that sits between a low-power microcontroller PWM output and the high-current gate terminals of external MOSFETs in a half- or full-bridge switching topology. Gate drivers belong to the broader category of motor drivers (PMIC motor drivers) and within that hierarchy to the brushed DC motor driver family. Without a dedicated gate driver, a microcontroller cannot directly switch the large gate charges required by power MOSFETs in motor bridges, especially at high PWM frequencies or with large die-size FETs. Key features include synchronous rectification control for low-side, internal charge pump supporting 100% duty cycle high-side drive, logic-level PWM input, undervoltage lockout (UVLO), and thermal shutdown protection. The TSSOP-EP package with its exposed thermal pad provides low thermal resistance, allowing sustained gate drive current at high ambient temperatures without derating. Cross-conduction prevention logic protects the external MOSFET bridge from shoot-through. Architecturally, the A4956 uses a charge-pump-generated supply rail above VM to fully enhance N-channel high-side MOSFETs across the full PWM duty cycle range. A single PWM input controls direction and magnitude of motor current through external H-bridge logic, while integrated dead-time generation prevents cross-conduction. Protection features include fault output flag, overcurrent detection via VDS monitoring, and thermal shutdown for system-level safety. Typical applications include brushed DC motor control in cordless power tools, consumer appliances, industrial automation, robotics, and battery-powered motor drive subsystems. The wide 5.5 V to 50 V supply range supports both single-cell Li-ion and multi-cell lead-acid or higher-voltage industrial bus architectures. A single-wire PWM interface simplifies host firmware, reducing MCU GPIO count. When designing with this device, select external N-channel MOSFETs with logic-level gate thresholds and ensure the bootstrap/charge-pump capacitors meet the datasheet recommendations. Layout the exposed pad with adequate copper area to maintain junction temperature within safe limits under continuous high-frequency switching. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineering context for motor drive subsystem selection.
A4956KLPTR-T - 50V Full-Bridge PWM Gate Driver | Allegro
The Allegro MicroSystems A4956KLPTR-T is a full-bridge PWM gate driver designed for pulse-width-modulated control of DC motors, capable of 50 V operation with gate drive for an all N-channel external MOSFET H-bridge, packaged in a 20-pin TSSOP-EP (exposed pad) with thermal pad for high-current PCB dissipation. According to the Allegro datasheet, the device operates from a supply voltage of 5.5 V to 50 V and provides parallel logic inputs with TTL-compatible PWM, enable, phase, and sleep controls for direct microcontroller interfacing. A brushed DC motor driver in this category is an integrated circuit that combines logic-level input conditioning with high-current gate drive circuitry, allowing low-power microcontrollers to control high-power motor windings through external N-channel MOSFETs. The A4956 specifically targets full-bridge (H-bridge) topologies where four external N-FETs switch bidirectional current through a single motor winding. This architecture (gate driver IC -> brushed DC motor driver -> motor driver IC -> power management IC -> semiconductor) places the A4956 between logic-level control and the high-current power stage. Key features include adjustable dead time to prevent cross-conduction, integrated charge pump for high-side N-FET drive at 100% duty cycle, comprehensive fault protection (overcurrent, thermal shutdown, undervoltage lockout), and a low-current sleep mode for battery-powered systems. The TSSOP-EP package's exposed thermal pad directly couples driver dissipation into the PCB copper, enabling sustained high-frequency PWM operation without external heatsinking. The A4956 uses a synchronous bootstrap architecture for high-side drive, with internal charge pump maintaining VGS above VCC for 100% duty cycle operation. Logic inputs accept 3.3 V or 5 V CMOS signals, and the internal current sense comparator enables cycle-by-cycle overcurrent protection with programmable threshold via an external resistor. Synchronous rectification capability reduces body-diode conduction losses in the external MOSFETs. Typical applications include brushed DC motor control in automotive auxiliary systems, industrial valve and actuator drives, robotics and CNC low-power axes, battery-powered power tools, and HVAC damper actuators. The wide 5.5 V to 50 V supply range accommodates both 12 V automotive and 24 V / 36 V industrial bus rails without intermediate regulation. When designing with this device, select external N-channel MOSFETs with VDS rating of at least 60 V (for the 50 V supply ceiling) and confirm that the bootstrap capacitor value (typically 100 nF to 1 uF) is sized for the highest PWM frequency and duty cycle in the application. Place the charge-pump and bootstrap capacitors as close as possible to their respective pins to minimize switching transients. This page synthesizes distributor pricing, drop-in and same-package alternatives, application examples and PCB design notes for the A4956KLPTR-T that are not consolidated in the manufacturer datasheet.
A4973SLBTR-T - 1.5A Full-Bridge PWM Motor Driver | Allegro
The Allegro MicroSystems A4973SLBTR-T is a bipolar full-bridge PWM motor driver that delivers continuous output currents up to ±1.5 A and operates from load voltages as high as 50 V. Housed in a 16-pin SOIC (SOIC-16 wide body, SLB suffix) package with an exposed thermal pad for power dissipation, the part is targeted at bidirectional DC motor control in industrial and consumer systems. A full-bridge motor driver (also called an H-bridge) is a power-integrated circuit that uses four switching elements arranged in an H topology to drive a bidirectional DC current through a single inductive load, enabling forward, reverse, and braking control from a single IC. Within the broader taxonomy, this device is a motor driver -> motion/ignition controller -> power management IC -> semiconductor. PWM (pulse width modulation) current control regulates the average load current by switching the bridge transistors at high frequency with a variable duty cycle, balancing torque smoothness against switching losses. Key features of the A4973SLBTR-T include internal fixed off-time PWM current-control circuitry, configurable fast and slow current-decay modes, a 3-bit DAC for current setpoint programming, a low-current sleep mode, and integrated protection such as thermal shutdown and crossover-current protection. Logic supply operates from 3 V to 5.5 V, allowing direct interface to 3.3 V or 5 V microcontrollers without level shifters. The wide 5 V to 50 V load supply range supports both 12 V/24 V industrial buses and higher-voltage applications. The architecture combines DMOS power outputs with CMOS logic on a single BiMOS die. The fixed off-time PWM timer and synchronous rectification reduce power dissipation, while the exposed pad (EP) SOIC-16 package keeps junction temperature within safe limits at the 1.5 A continuous rating when the PCB copper pour is sized appropriately. Internal logic handles shoot-through protection and cross-conduction lockout, simplifying firmware and reducing external component count. Typical applications include DC brushed motor control in printers, scanners, point-of-sale equipment, textile machines, and small industrial automation modules. The integrated 3-bit DAC and sleep mode also suit battery-powered actuators where standby current matters. When laying out the PCB, keep the high-current load return path short and stitch the EP to a continuous ground copper pour. Observe the 50 V absolute-maximum load supply and add a low-ESR bypass capacitor close to the VBB pin to suppress switching transients.
A4975SLBTR-T - ±1.5A Full-Bridge PWM Microstepping Driver | Allegro
The Allegro MicroSystems A4975SLBTR-T is a full-bridge PWM microstepping motor driver rated for ±1.5 A continuous output current and 50 V load supply, housed in a 16-pin SOIC package with exposed thermal pad (SLB suffix) and supplied on tape-and-reel (TR). It is engineered to drive one winding of a bipolar stepper motor in microstepping mode using an internal 3-bit nonlinear DAC and selectable slow, fast, or mixed current-decay topologies. The A4975SLBTR-T combines digital current-ratio control with an external sense resistor, allowing the host MCU to command full-, half-, quarter-, and eighth-step current waveforms without software sine tables. A bipolar stepper-motor driver is an integrated power stage that commutates the two windings of a two-phase stepper motor by alternately sourcing and sinking current through a full H-bridge per phase. Microstepping drivers subdivide each full step into 2, 4, or 8 sub-steps by shaping the phase current with a sinusoidal DAC, dramatically reducing resonance, audible noise, and step-loss at low speeds. The A4975 family sits inside the broader taxonomy of motor-driver ICs -> power-management ICs -> mixed-signal semiconductors, and bridges the gap between discrete Darlington drivers and modern integrated FET stepper controllers. Key features include ±1.5 A continuous output current, 50 V load voltage rating, 4.5 V to 5.5 V logic supply, internal PWM current control with user-selectable decay modes, 3-bit nonlinear DAC for microstepping, internal thermal shutdown, and an exposed thermal pad (SLB package) for improved power dissipation. The mixed-decay mode reduces ripple at mid-range currents, while slow-decay mode minimizes switching losses at low current levels. The 3-bit nonlinear DAC follows the ideal sine/cosine current profile, eliminating the need for software lookup tables. The A4975SLBTR-T uses bipolar DMOS output stages driven by an on-board charge pump and a synchronous rectification control scheme. Mixed-decay current control automatically transitions from fast-decay to slow-decay within each PWM cycle, optimizing ripple versus acoustic performance. The integrated synchronous rectification eliminates the need for external flyback diodes, reducing BOM count and PCB area. The exposed thermal pad provides a low-thermal-resistance path to the PCB copper, essential for sustained ±1.5 A operation. Typical applications include bipolar stepper motors in printers, scanners, CNC machines, robotics, and medical-fluid-handling pumps. The wide 50 V load range also supports 24 V and 36 V industrial bus rails. When designing with the A4975SLBTR-T, place the sense resistor as close as possible to the SENSE pin and provide a solid ground pour under the exposed thermal pad. Decoupling capacitors on VBB and VDD must be low-ESR ceramics placed within 5 mm of the IC pins. This page synthesizes distributor pricing, drop-in same-family variants, and practical PCB/thermal design notes not found in the manufacturer datasheet alone.
A4980KLPTR-T - 28V 1.4A Bipolar Stepper Driver, TSSOP-28EP | Allegro
The Allegro MicroSystems A4980KLPTR-T is an automotive-grade, programmable bipolar stepper motor driver with integrated translator and SPI-compatible serial interface, housed in a 28-pin TSSOP with exposed thermal pad (TSSOP-28-EP). Designed for full-, half-, quarter- and sixteenth-step microstepping operation, the A4980 delivers up to ±1.4 A per phase at motor supply voltages up to 28 V, with synchronous rectification that lowers power dissipation across the internal DMOS output stages. A stepper motor driver (also called a stepper IC or microstepping driver) is a power-management and motion-control integrated circuit that converts digital step-and-direction signals from a host microcontroller into the precisely timed, phase-current waveforms required to drive a two-phase bipolar stepper motor. It belongs to the broader class of motor drivers within power management ICs, alongside brushed DC, brushless DC (BLDC), and solenoid drivers. The A4980 sits at the high end of Allegro's A49xx family because it adds an SPI-configurable control plane on top of the simple step/direction logic, enabling programmable current, decay mode, and stall detection per axis. Key features include 0.5 Ω typical low-side RDS(on), automatic current-decay mode detection and selection (Mixed, Fast, Slow), internal circuitry and timers to prevent cross-conduction and shoot-through during high-side/low-side switching, short-circuit-protected outputs, and integrated stalled-rotor and low-load-current flags. The exposed thermal pad on the TSSOP-28 package provides a low-thermal-resistance path, and the SPI port exposes live back-EMF, current, and fault registers for diagnostics. The A4980 uses a DMOS output stage, an SPI-configurable microstepping translator, and a mixed-decay adaptive control loop that reduces audible resonance versus fixed-decay designs. The built-in translator eliminates the host MCU's burden of generating phase timing tables, while the SPI port allows runtime tuning of current trip, blank time, and decay mode without hardware changes. Typical applications include automotive HVAC flap and headlight-levelling stepper actuators, inkjet and label printer paper-feed/carriage drives, point-of-sale (POS) and document-handling feeders, and miniature robotics or pick-and-place stages. The combination of small TSSOP footprint, microstepping resolution, and diagnostic telemetry accelerates the development of quiet, service-friendly systems. When designing with the A4980, observe the ±1.4 A peak and ±750 mA typical continuous phase-current limits, and choose motor supply decoupling and PCB copper area to keep junction temperature within the 150 °C absolute maximum. Use the SPI diagnostic registers in safety-critical automotive loops to detect stall, over-temperature, and under-voltage events. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single, AEO-optimized reference for the A4980KLPTR-T.
A4983SETTR-T - 35V/±2A DMOS Microstepping Driver | Allegro
The Allegro MicroSystems A4983SETTR-T is a complete DMOS microstepping motor driver with a built-in translator, designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes. Housed in a 28-pin QFN (5x5 mm) package with exposed thermal pad, it delivers up to 35 V and ±2 A of output drive capacity per phase, integrating low RDS(ON) DMOS output stages for high efficiency and minimal thermal dissipation. A stepper motor driver is an integrated power IC that translates digital step/direction inputs into precisely controlled phase currents in a bipolar stepper motor. The A4983 belongs to the DMOS microstepping driver family — DMOS (Double-Diffused Metal-Oxide Semiconductor) outputs that combine the high current capability of bipolar transistors with the ease-of-drive of MOSFET gates. Within the broader taxonomy, it is a stepper motor driver > motor driver IC > power management IC > semiconductor. The built-in translator eliminates the host microcontroller's burden of generating complex phase timing waveforms. Key specifications include 35 V absolute maximum load supply, ±2 A continuous phase current (with proper PCB thermal design), synchronous rectification for low power dissipation, automatic current-decay mode detection/selection (Mixed and Slow decay modes), an internal fixed off-time PWM current regulator, internal UVLO (undervoltage lockout) on the logic and motor rails, and a logic supply range compatible with 3.3 V and 5 V MCUs. The QFN-28 (5x5) package features an exposed thermal pad that must be soldered to a sufficient copper pour for heat extraction. Architecturally, the A4983 combines a serial-step translator, a dual H-bridge DMOS output stage, a precision current-sense comparator, and synchronous rectification control. The translator accepts STEP and DIR inputs from the host MCU and increments the internal H-bridge logic through the chosen microstep table. The current regulator uses an external sense resistor (RSENSE) to chop the phase current at the user-set peak, with automatic decay-mode selection optimizing zero-crossing behavior in mid-range microsteps. Synchronous rectification reduces body-diode conduction losses by actively turning on the low-side DMOS during current recirculation. Typical applications include 3D printers (replacing or supplementing A4982/A4988 designs), small CNC machines, robotics actuator drivers, automated textile machinery, and laboratory automation steppers. The 1/16-step resolution and ±2 A drive capacity are also well-matched to NEMA 17 bipolar steppers in low-voltage (12-24 V) systems. When designing with this part, ensure the exposed thermal pad is soldered to a copper pour of at least 1 square inch, the sense resistor is sized for the desired peak phase current using ITRIP = VREF / (8 × RSENSE), and the logic supply (VDD) is decoupled with a 100 nF ceramic close to the pin. Decay-mode selection must be tested under load; Mixed decay is the typical default but Slow decay may be preferred for low-inductance motors. This page synthesizes distributor pricing, drop-in cross-references, and application design notes not consolidated in the manufacturer datasheet.
A4989SLDTR-T - Dual Full-Bridge MOSFET Driver | Allegro MicroSystems
The Allegro MicroSystems A4989SLDTR-T is a dual full-bridge gate driver with an integrated microstepping translator, designed to drive higher-power industrial bipolar two-phase stepper motors (typically 30 W to 500 W) using external N-channel power MOSFETs at motor supply voltages from 12 V to 50 V. The device operates from a 3 V to 5.5 V logic supply and packages in a 38-pin TSSOP (SLD). The integrated translator accepts a simple step/direction interface and a microstep resolution select, generating phase currents that support full-step through 1/16-step microstepping without external waveform computation. A motor driver IC is an integrated circuit that translates low-power logic signals into the high-current, high-voltage phase waveforms required to commutate stepper motors, brushless DC motors, or brushed DC motors. Within the power management and motion control hierarchy, gate drivers like the A4989 sit between a low-voltage microcontroller (logic side) and external power MOSFETs (power side), combining logic-level translation with high-current gate drive and adaptive dead-time insertion. Allegro's broader Allegro MicroSystems portfolio spans Hall-effect sensors, brushless DC drivers, and stepper drivers optimized for industrial automation, robotics, and 3D-printer-style motion stages. Key features of the A4989SLDTR-T include programmable mixed-decay timing, synchronous rectification for low dissipation, internal UVLO and thermal shutdown, a programmable blanking time, and an industry-standard 2-wire step-and-direction interface. The driver supports microstep resolutions up to 1/16 step and is suitable for industrial bipolar stepper motors in the 30 W to 500 W range where external MOSFETs allow scaling to higher current than an integrated-FET part can deliver. Technically, the A4989 uses an internal charge-pump-driven gate drive to deliver the high-side gate boost voltage needed for 100% duty-cycle PWM operation at 50 V motor supply. The mixed-decay mode combines slow and fast decay dynamically to reduce ripple current at low step rates, while synchronous rectification reduces body-diode losses during PWM off-time. The integrated translator is cascadable via DIR and STEP pins, enabling multi-axis stepper systems with synchronized motion. Typical applications include industrial stepper motor drives, CNC routers, 3D printers, textile machinery, labeling equipment, and automated factory motion stages. The wide 12 V to 50 V motor supply range lets one design platform cover 24 V bus systems as well as higher-voltage industrial rails. When designing with the A4989, select external N-channel MOSFETs with appropriate VDS rating (>= 60 V recommended for headroom), R_DS(on), and gate charge to balance efficiency and thermal performance. A common trade-off is that the A4989 requires more design effort than fully-integrated drivers like the A4988 or DRV8825 because the external MOSFET selection directly affects efficiency, thermal behavior, and EMI. For designs needing the lowest BOM count and fastest time-to-market in the sub-2 A range, an integrated-FET driver may be a better fit. This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes not found in the manufacturer datasheet alone.
ADT7475ARQZ-REEL - 4-Fan PWM Thermal Controller | onsemi
The onsemi ADT7475ARQZ-REEL is a dBCool remote thermal monitor and four-fan PWM controller designed for active cooling in noise-sensitive or power-sensitive equipment. The verified distributor listing specifies a -40°C to 125°C temperature-monitor range, internal and external sensor support, SMBus output, and a 16-QSOP package. Its core role is to combine thermal monitoring with closed-loop fan control rather than relying on fixed-speed cooling. A remote thermal monitor and fan controller is a power-management and thermal-management IC that measures temperature and regulates cooling equipment according to configured thresholds. In the hierarchy, it belongs to system monitoring and fan-control ICs, which sit below broader thermal-management and power-management systems. The ADT7475 supports one on-chip temperature sensor and two remote temperature-sensor diode channels, enabling distributed temperature measurement in a compact controller. Key verified features include control and monitoring for up to four fans, high- and low-frequency fan-drive signals, an SMBus output, and an extended temperature-measurement range extending to 191°C as stated in indexed descriptions of the manufacturer datasheet. These features allow designers to combine local package-temperature protection with remote-diode monitoring while using variable-speed fans to reduce acoustic noise and power consumption. The controller measures and controls fan speed for thermal regulation, making it applicable to computer servers, storage systems, communications equipment, industrial controllers, and other multi-fan platforms. Its internal sensor and remote-diode inputs can support different thermal zones, while PWM output enables gradual fan-speed changes instead of abrupt full-speed operation. The 16-QSOP surface-mount package is suitable for compact production boards. A key design consideration is validating remote-diode electrical characteristics, sensor placement, fan-drive polarity, and SMBus configuration against the manufacturer datasheet. Because the provided search data does not expose exact timing, voltage, current, resolution, or absolute-maximum values for every parameter, those details are marked as needed rather than inferred. This page combines verified distributor facts, official-datasheet findings, and explicit engineering data gaps. Unlike a simple fan switch, the ADT7475ARQZ-REEL adds active temperature feedback and programmable fan-speed control, helping systems balance thermal margin against fan noise and power. This synthesis is intended to support component selection, schematic planning, and qualified drop-in replacement research.
AMIS30522 - Micro-Stepping Stepper Motor Driver, 1.5A, SPI | onsemi
The onsemi AMIS30522 is a micro-stepping stepper motor driver for bipolar stepper motors, controlled via I/O pins and a standard SPI interface from an external microcontroller. The chip integrates a current-translation table, an on-chip voltage regulator, a reset-output and watchdog reset block, and supports a maximum phase current of approximately 1.5 A peak from an 8 V to 29 V motor supply. It is housed in a 32-pin NQFP (Pb-free) package with an exposed thermal pad that drops junction-to-ambient thermal resistance to roughly 30 °C/W when a PCB ground plane is used. What is a micro-stepping stepper motor driver? A micro-stepping stepper motor driver is an integrated circuit that translates digital step commands (clock pulses plus a direction signal) into precision-regulated phase currents in a two-phase bipolar stepper motor. Unlike simple full-step or half-step drivers, micro-stepping drivers divide each full electrical step into many smaller increments (up to 1/32 micro-step in this family), producing smoother rotation, finer angular resolution, and dramatically reduced resonance and audible noise. The driver sits in the motor-control signal chain: MCU -> SPI/STEP/DIR -> stepper driver -> H-bridge -> motor windings. Key features include programmable peak current up to 1.5 A, a built-in current-translation table that automatically handles micro-step sine profiles, integrated charge-pump for the high-side N-FETs, and a configurable slew rate that lets designers trade EMI against step rate. The on-chip 5 V regulator can supply external logic, and the watchdog/reset output simplifies MCU supervisor design. Safety features include thermal shutdown, under-voltage lockout, and short-to-ground and short-to-battery detection on the motor outputs. The AMIS30522 architecture combines a serial-control block (SPI + NXT + DIR inputs) with a dual H-bridge output stage built around on-chip N-channel MOSFETs. The internal translator tracks rotor position with the NXT clock and DIR state, generating the proper sine/cosine coil currents. SPI registers allow the host MCU to set peak current, micro-step resolution, decay mode, and slew rate; status registers expose fault conditions. The device is specified for an ambient operating temperature range of -40 °C to +125 °C (automotive-grade equivalent NCV70522) and is fully compatible with the 12 V automotive voltage environment, including load-dump and jump-start transients described in the AMIS-30522 datasheet. Typical applications include headlight leveling and adaptive headlamp stepper actuators in cars, HVAC flap and valve control in industrial equipment, XY stages and Z-axis drives in 3D printers, microfluidic pumps and analyzer positioning in medical instruments, throttle-by-wire and idle-air-control actuators, and printer/scanner paper-feed and carriage motors. The wide supply range and integrated protection make it well-suited to systems that must survive harsh electrical environments. When designing with this driver, place at least one 100 nF and one 10 µF ceramic bypass capacitor directly on the motor supply pin, and connect the exposed pad to a low-impedance ground plane with multiple thermal vias. The motor supply should be decoupled from the logic 5 V rail to prevent logic-noise coupling into the analog reference. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single source for parametric comparison, PCB layout guidance, and replacement selection.