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ST1S50PUR - 3A, 18V Synchronous Step-Down Converter | STMicroelectronics
The ST1S50PUR is a high-efficiency, synchronous step-down DC-DC converter from STMicroelectronics, designed to deliver up to 3A of continuous output current from an input voltage range of 4V to 18V. Housed in a compact DFN8 (3x3 mm) package, this device integrates both high-side and low-side power MOSFETs, eliminating the need for an external Schottky diode and simplifying PCB layout. The output voltage is adjustable from 0.8V to VIN, allowing flexibility for a wide range of applications. A synchronous buck converter is a type of DC-DC step-down regulator that uses two active switches (typically MOSFETs) instead of a diode for the low-side element, which significantly improves efficiency, especially at lower output voltages. This architecture is fundamental in power management ICs, where efficiency directly impacts battery life, thermal management, and system reliability. The ST1S50PUR belongs to the family of synchronous step-down converters, which are essential building blocks in modern electronic systems, from portable devices to industrial equipment. Key features of the ST1S50PUR include a fixed 1.5 MHz switching frequency, which allows the use of small, low-cost inductors and capacitors, reducing the overall solution footprint. The device offers a typical efficiency of 90% at 3A load, with a low quiescent current of 1.2 mA in light-load operation. It also features internal soft-start to limit inrush current, overcurrent protection, and thermal shutdown for robust operation. The DFN8 package has an exposed pad for enhanced thermal performance, with a thermal resistance of 40°C/W. The ST1S50PUR utilizes a current-mode control architecture, providing fast transient response and stable operation over a wide range of input and output voltages. The integrated MOSFETs have low RDS(on) (typically 120 mΩ high-side and 80 mΩ low-side), minimizing conduction losses. The device operates over a junction temperature range of -40°C to +150°C, making it suitable for demanding environments. Typical applications include point-of-load (POL) converters for FPGAs, DSPs, and microcontrollers, as well as power supplies for set-top boxes, networking equipment, and industrial control systems. The wide input voltage range also supports 12V and 24V bus systems, making it versatile for various power architectures. When designing with the ST1S50PUR, ensure proper input and output capacitor selection to maintain stability and minimize ripple. The exposed pad should be soldered to a large copper area for effective heat dissipation. The EN pin allows for power sequencing, and the soft-start feature prevents output overshoot during startup.
ST730M50R - 300mA 28V LDO Regulator, 5V Fixed Output | ST | STMicroelectronics
The STMicroelectronics ST730M50R is a 300 mA, 28 V low-dropout (LDO) linear voltage regulator with a fixed 5.0 V output, housed in a 5-pin SOT-23-5 surface-mount package. It accepts an input voltage from 2.5 V to 28 V, delivers up to 300 mA of continuous output current, and exhibits a typical dropout voltage of approximately 600 mV at full load. The regulator draws only 5 microamperes of quiescent current, making it well suited to always-on and battery-powered designs. According to the manufacturer datasheet (document DS13036, revision 5, December 2023), the part embeds current-limit, short-circuit, and thermal-shutdown protection blocks to survive field faults. An LDO (Low-Dropout) linear regulator is a class of voltage regulator that maintains a tightly regulated output voltage even when the input voltage approaches the output voltage - the so-called dropout condition. LDOs sit one rung below the broader linear-regulator family, which itself is a subset of voltage regulators and ultimately of power management ICs (PMICs). Unlike switching converters, LDOs do not introduce switching ripple into the output rail, which is the central reason engineers select them for noise-sensitive analog supply pins. Key differentiating features include the 28 V maximum input rating (well above the common 5 V or 12 V rails), the very low 5 µA quiescent current that preserves standby battery life, and 600 mV typical dropout that lets the LDO regulate cleanly even on depleted battery or under varying load transients. The internal current-limit foldback and 165 °C thermal-shutdown threshold (typical) defend the die against overload and PCB hot-spots. Output voltage accuracy is specified at +/-2 percent over line, load, and temperature. Architecturally the ST730M50R is a PMOS-pass LDO with a high-impedance feedback divider, bandgap reference, and error amplifier. The PMOS topology provides low dropout and inherent short-circuit protection through Rds(on) self-limiting, while the bandgap reference delivers temperature-stable 5 V with low noise density on the output pin. Typical applications include 24 V industrial sensor biasing, after-market automotive accessories (e.g., dashcams and alarms), microcontroller and wireless-module always-on rails, low-power IoT nodes powered directly from 12 V batteries, and post-regulation stages that clean up switching-converter outputs for analog subsections. The wide input range also lets the same part cover both 12 V and 24 V industrial bus systems, simplifying BOM management. Designers should pay close attention to thermal dissipation: at VIN = 24 V, VOUT = 5 V and 300 mA, the device dissipates roughly 5.7 W and requires either a copper-cooling pour or the larger SOT-23-5 land pattern with thermal vias. Use a 1 µF X7R ceramic on the input and a 2.2 µF X7R ceramic on the output placed within a few millimetres of the pins - the part is specified for ESR stability up to several hundred milliohms. This page synthesises distributor pricing, drop-in alternatives, and practical thermal/protection notes drawn from the ST730 datasheet and reference designs - content not assembled on any single manufacturer page.
STA500 - 30V 3.5A Quad Power Half-Bridge | STMicroelectronics
The STMicroelectronics STA500 is a monolithic quad power half-bridge stage in Multipower BCD technology, rated for a 30 V supply and 3.5 A output in a PowerSO-36 surface-mount package. It combines four configurable half bridges with complementary DMOS output stages, CMOS-compatible logic inputs, and protection for thermal, overvoltage, and undervoltage conditions. A power half-bridge is a switchable power-conversion building block within a bridge amplifier or motor-driver system. Each half bridge uses two complementary switches to drive a load between the supply rail and ground. The STA500 can operate as a dual bridge or, with CONFIG connected to VDD, as a single bridge with doubled current capability. It can also be reconfigured for half-bridge operation in binary mode. This hierarchy places the STA500 among Class D power stages, bridge-driver ICs, and power-management semiconductors. Key features include a 30 V maximum supply rating, 3.5 A output-current capability, 200 mΩ complementary DMOS output resistance, and CMOS-compatible logic inputs. The device also provides output overvoltage and undervoltage protection plus thermal warning and thermal shutdown. These functions make the STA500 suitable for compact Class D audio output stages where multiple switched outputs are required. Technically, the monolithic quad-stage architecture reduces the number of external power devices needed for a multichannel or bidirectional-bridge amplifier. Multipower BCD technology integrates the power output path with control logic in one package. The PowerSO-36 format supports surface-mount assembly while providing a substantial thermal pad for heat transfer into the PCB copper area. Designers should still verify the exact SOA, thermal limits, output-current derating, and pin-level conditions against the manufacturer datasheet. Typical uses include stereo and multichannel audio amplifiers, portable speakers, powered headphones, subwoofer stages, and compact Class D systems. Binary-mode operation can also suit specialized bidirectional or transformer-isolated audio topologies where the application requires half-bridge behavior rather than conventional full-bridge drive. For robust implementation, preserve the datasheet input/output decoupling arrangement, route high-current outputs with minimal loop area, and provide substantial thermal copper under the exposed pad. The STA500 is a 30 V part, so 30 V is a maximum rating rather than a recommended operating margin; transient, supply, and signal limits must be respected. This page consolidates verified manufacturer and distributor information, strict drop-in alternative screening, application guidance, and practical PCB considerations. Because the supplied data does not establish a sufficient set of pin-to-pin replacements, compatibility and lifecycle details are explicitly qualified rather than inferred.
STA505 - 40V 3.5A Quad Half-Bridge Amplifier | STMicroelectronics
The STMicroelectronics STA505 is a 40 V, 3.5 A quad power half-bridge stage in a PowerSO-36 package, intended for Class D audio amplification in mono, stereo, or reconfigured bridge arrangements. It integrates four complementary power half-bridges, configurable operating modes, CMOS-compatible logic inputs, thermal protection, and output overvoltage and undervoltage detection. An audio power half-bridge is one section of a switching amplifier that uses complementary power transistors to drive a load in one current direction. A quad half-bridge can provide two stereo channels, four independent modulation outputs, or another bridge configuration selected by the CONFIG pin. The STA505 is therefore positioned between discrete power-stage design and a complete integrated audio amplifier. Key verified characteristics include a 40 V power-stage rating, a 3.5 A half-bridge current capability, BCDMOS technology, and PowerSO-36 packaging. The device can be used as a dual bridge or reconfigured by connecting CONFIG to VDD for a single-bridge configuration with double current capability. Its binary half-bridge mode is also identified in the manufacturer datasheet. The STA505 is suitable for high-power Class D audio systems, including stereo speaker drives, mono subwoofer amplifiers, compact hi-fi equipment, and external amplifier modules. Compared with a discrete MOSFET output stage, the monolithic quad half-bridge reduces board-level integration effort while retaining configurable drive modes and integrated protection functions. Designers should verify the exact input, output, power, and protection limits in the STMicroelectronics datasheet before layout and power-supply selection. The PowerSO-36 package requires careful thermal planning, low-impedance supply routing, and output-filter design appropriate to the target speaker impedance and switching frequency. This page consolidates the verified manufacturer and distributor information for the STA505, including configuration guidance, application context, and practical design considerations for evaluating the quad half-bridge stage.
STA508 - 40V 4.5A Quad Power Half Bridge | STMicroelectronics
The STMicroelectronics STA508 is a 40 V, 4.5 A monolithic quad power half-bridge stage implemented in Multipower BCD technology and packaged in PowerSO-36. It provides four configurable half-bridge outputs that can operate as two full bridges, one full bridge with doubled output-current capability when CONFIG is tied to VDD, or individual half bridges in Binary mode with reduced current capability. A power half bridge is a switching amplifier stage containing two MOSFETs arranged between the supply and ground rails, with one output node at their midpoint. A quad half-bridge IC consolidates four such stages so Class D audio controllers can drive stereo, multi-channel, or bridged speaker systems efficiently. The STA508 is therefore positioned within the hierarchy of Class D audio amplifier IC, power half-bridge, audio output stage, and power management semiconductor. Key verified features include a 40 V maximum power-supply rating, 4.5 A output-current capability, four integrated power half bridges, configurable bridge topology, and Multipower BCD process technology. Configuration flexibility allows the same device organization to support dual-bridge, single-bridge, and Binary half-bridge operation, reducing board-area requirements when a product family needs multiple channel counts. The device is intended to work with an external Class D audio controller rather than directly accept analog audio. The controller generates gate-drive signals, while STA508 supplies the high-current switching path to the speaker outputs. Its BCD construction combines analog control capability with efficient power-device integration, making it suitable for compact, high-power audio systems where board area and channel flexibility matter. Typical applications include stereo Class D amplifiers, multi-channel home audio, active speakers, powered subwoofers, and compact consumer audio products. A 24 V system is specifically shown in the verified web material for an STA508 monoblock amplifier, illustrating use of the device's 40 V supply capability. Thermal and layout design are critical because the PowerSO-36 package and external heatsink must dissipate the power-stage loss. The power and ground pins, output nodes, controller interface, and decoupling network should follow the manufacturer datasheet layout exactly. Keep high-current loops compact and provide adequate copper and heatsinking; otherwise output-current capability can be limited by junction temperature before the electrical rating is reached.
STA575 - 100W Stereo BASH Power Amplifier | STMicroelectronics
The STMicroelectronics STA575 is a 100+100 W stereo BASH power amplifier designed for use with the STABP01 digital processor. It delivers 80+80 W into 4 or 8 ohm loads at 0.5% total harmonic distortion and is available in the 27-Flexiwatt vertical power package. The device uses a mono-chip bridge stereo amplifier architecture with high-dynamic preamplifier input stages, external programmable feedback, compressors, and AC-coupled inputs. The STA575 is an integrated audio power module within the broader amplifier IC, audio amplifier, and Class AB amplifier hierarchy. Class AB amplifiers combine transistor conduction for improved linearity with lower distortion than many switching audio power stages. In the BASH architecture, the STABP01 supplies digital control and signal-processing functions while the STA575 provides the high-power analog output stage and speaker drive capability. Key features include 100+100 W output power into 4 or 8 ohms at 10% THD, 80+80 W output power at 0.5% THD, stereo operation, high-dynamic preamplifier inputs, external programmable feedback, integrated compressor functions, and AC-coupled input coupling. The 27-pin Flexiwatt vertical package is intended for audio power amplifier designs requiring substantial output current and thermal management. The device is intended for stereo speaker systems, compact hi-fi equipment, multimedia enclosures, powered speakers, and other Class AB audio products. The manufacturer datasheet identifies the BASH architecture and the electrical operating limits that determine speaker impedance, supply voltage, thermal design, and distortion performance. Designers should use the complete datasheet for pin assignment, recommended application circuitry, protection requirements, and maximum ratings. Because this is a high-power analog module, PCB layout and heat sinking are as important as signal selection. Keep high-current speaker paths short and wide, use the recommended input and feedback networks, decouple the supply rails close to the device, and validate thermal performance at the intended output power. A nominal 100 W rating does not eliminate the need for an adequate copper area, thermal interface, enclosure airflow, or speaker-load verification. This page combines the verified STMicroelectronics and distributor descriptions with practical engineering guidance. It is intended to help engineers identify the correct function, package, power class, datasheet, and design constraints while avoiding unsupported substitute claims or fabricated electrical details.
STA8600A - High-Performance Audio Amplifier IC | STMicroelectronics
The STA8600A is a high-performance audio amplifier integrated circuit from STMicroelectronics, designed for automotive and consumer audio systems. It delivers up to 4 x 50W output power into 4Ω loads, with a wide supply voltage range of 6V to 18V. The device is housed in a 36-pin PowerSO package, providing excellent thermal performance for high-power applications. An audio amplifier is an electronic device that increases the amplitude of audio signals, driving speakers or transducers. It is a critical component in the audio signal chain, converting low-power audio signals into high-power outputs suitable for loudspeakers. Audio amplifiers are classified into classes (A, B, AB, D) based on their operating principles and efficiency. The STA8600A is a Class AB amplifier, offering a balance between linearity and efficiency, making it suitable for high-fidelity audio reproduction. Key features of the STA8600A include a high signal-to-noise ratio of 100 dB, low total harmonic distortion of 0.01% at 1 kHz, and a wide operating temperature range of -40°C to +105°C. The device integrates multiple protection features, including overcurrent, overtemperature, and short-circuit protection, ensuring reliable operation in demanding environments. The PowerSO package with exposed pad enhances heat dissipation, allowing continuous high-power output without external heatsinks in moderate conditions. The STA8600A utilizes a complementary bipolar output stage with a precision bias circuit, achieving low crossover distortion and stable quiescent current. The device supports multiple output configurations, including stereo and quad-channel modes, providing flexibility for various system designs. Its high PSRR of 80 dB minimizes power supply noise, ensuring clean audio output even with noisy supply rails. Typical applications include car audio head units, external amplifiers, home theater systems, and active speakers. The wide supply voltage range makes it compatible with both 12V automotive systems and 18V consumer electronics. The integrated protection features reduce external component count, simplifying PCB design and improving system reliability. When designing with the STA8600A, ensure adequate PCB copper area for thermal dissipation, especially when driving low-impedance loads at high power. The exposed pad must be soldered to a large ground plane to achieve the specified thermal resistance. Proper decoupling on the supply pins is essential to maintain stability and minimize distortion.
STA8610A - High-Performance Audio Amplifier IC | STMicroelectronics
The STA8610A is a high-performance audio amplifier integrated circuit from STMicroelectronics, designed for automotive and consumer audio systems. It delivers up to 4 x 50W output power into 4Ω loads, with a wide supply voltage range of 6V to 18V. The device is housed in a 36-pin PowerSO-36 package, providing excellent thermal performance for high-power applications. An audio amplifier is an electronic device that increases the amplitude of audio signals, driving speakers or headphones with sufficient power and fidelity. In the signal chain, the audio amplifier sits between the preamplifier (or DAC) and the speakers, converting low-level audio signals into high-power outputs. It is a critical component in the audio system hierarchy, which includes sources (e.g., CD players, smartphones), preamplifiers, amplifiers, and transducers. The STA8610A belongs to the class of analog power amplifiers, specifically designed for multi-channel applications. Key features of the STA8610A include a high output power of 4 x 50W at 10% THD, a low quiescent current of 120mA, and a wide operating temperature range of -40°C to +105°C. The device integrates short-circuit protection, thermal shutdown, and standby/mute functions, ensuring robust operation in demanding environments. Its high efficiency and low distortion make it suitable for high-fidelity audio reproduction. The STA8610A utilizes a complementary MOS (CMOS) output stage, providing high current capability and low output impedance. The device features a differential input stage for improved noise rejection and a sophisticated bias circuit to minimize crossover distortion. The PowerSO-36 package with exposed pad enhances heat dissipation, allowing continuous operation at high power levels without external heatsinks in moderate conditions. Typical applications include car audio head units, home theater systems, and active speaker systems. In automotive applications, the STA8610A's wide supply range and robust protection features ensure reliable performance under varying battery conditions. In home theater, its multi-channel capability simplifies the design of surround-sound amplifiers. When designing with the STA8610A, ensure adequate PCB copper area for thermal management, especially when driving low-impedance loads at high power. The standby and mute pins allow for power management and pop-noise reduction during power-up and shutdown sequences.
STCMB1 - TM PFC + LLC Combo Controller 800V | STMicro
The STMicroelectronics STCMB1 is a combination transition-mode (TM) Power Factor Correction (PFC) controller and high-voltage double-ended LLC resonant half-bridge controller integrated in a single chip, supplied in a 20-pin SO (SO20W) package. According to the manufacturer datasheet, the device targets SMPS adapters and open-frame power supplies with universal-mains input and high-voltage DC output, where it implements both the front-end PFC pre-regulator and the downstream resonant converter with a glue-logic supervisor in one IC. A TM PFC controller (transition-mode PFC, also known as critical-conduction-mode PFC) is a power-factor-correction topology that forces the boost inductor current to reach zero before each switching cycle is re-triggered. Compared with continuous-conduction-mode (CCM) PFC, it reduces switching losses and enables the use of smaller magnetics, making it popular in adapters up to a few hundred watts. An LLC resonant half-bridge is a soft-switching DC-DC topology that achieves zero-voltage switching on the primary FETs and zero-current switching on the secondary rectifiers, delivering high efficiency at high switching frequency with low EMI. The STCMB1 combines both stages plus 800 V start-up and X-cap discharge, removing the need for a separate standby controller. Key features of the STCMB1 include 800 V high-voltage start-up with integrated input voltage sensing, active X-cap discharge circuitry (IEC 62368-1 and UL Demko certified) for reduced standby power, a switching frequency of approximately 500 kHz for the LLC stage, independent debug mode for both PFC and LLC, and an internal 2.5 V transconductance reference. The 800 V high-voltage section supports universal mains (90-265 V AC) and over-voltage transients without an external depletion-mode MOSFET or auxiliary winding, simplifying the front-end biasing. The X-cap discharge block eliminates the bleeder resistors traditionally required to meet safety standards for input capacitor discharge time after AC removal. The regulation loop uses a transconductance amplifier with an internal 2.5 V reference and a typical gain-bandwidth product of 1 MHz, providing the PFC output voltage regulation and LLC output voltage regulation with two external compensation networks. The glue logic coordinates soft-start, brown-in/brown-out, fault handling, and burst-mode entry across the two stages, so designers do not need to interlock two separate controllers manually. Wide-bandgap compatibility (GaN and super-junction silicon) is supported through the high-side driver output structure. Typical applications of the STCMB1 include 90 W to 300 W USB-PD adapters, laptop power supplies, LED TV power boards, all-in-one PC supplies, and any high-density AC-DC converter where efficiency above 90 percent, low standby power (below 75 mW via X-cap discharge), and reduced BOM count are design priorities. The 20-pin SO wide-body (SO20W) package provides sufficient creepage for primary-side high-voltage pins and adequate thermal performance for adapters operated in enclosed plastic housings. When designing with this IC, layout the PFC inductor and the LLC resonant tank so that their high-current loops do not share a common ground return with the small-signal analog ground of the TM PFC E/A. Designers should also ensure the X-cap discharge path is intact for IEC 62368-1 compliance and place the bootstrap diode close to the high-side driver pin to avoid shoot-through during LLC start-up transients. This page synthesizes distributor stock signals, pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a consolidated technical reference for SMPS adapter development.
STEF512PUR - Dual eFuse 5V/12V 3A Hot-Swap | STMicroelectronics
The STMicroelectronics STEF512PUR is an integrated dual electronic fuse (eFuse) that protects downstream circuitry from overcurrent and overvoltage events in applications requiring hot-swap operation and inrush current control. The device embeds two independent high-side load switches — one optimized for 5 V rails and one for 12 V rails — each rated up to 3 A continuous current in a 10-pin QFN (2 mm x 3 mm) package. Each channel integrates a low-RDS(on) power FET that minimizes voltage drop from the main supply to the load during normal operation, plus two analogue control loops that clamp output voltage and limit input current independently. An electronic fuse (eFuse) is a solid-state replacement for a traditional thermal fuse or PTC, offering resettable, programmable protection with fast fault response. It belongs to the broader family of hot-swap controllers and current regulators within power-management ICs (PMICs). The eFuse architecture allows precise user-adjustable startup behavior via external soft-start capacitors and current-limit thresholds via sense resistors, eliminating the need for bulky mechanical fuses in space-constrained designs. Key features include independent fault timers, thermal shutdown, UVLO and OVLO protection per channel, a Fault flag output for system-level diagnostics, and adjustable slew-rate control. Each eFuse channel operates independently, allowing the 5 V and 12 V rails of a system to be protected, sequenced, and monitored separately without external coordination logic. The integrated MOSFETs drastically reduce BOM count compared to discrete hot-swap solutions built from FETs, op-amps, and sense resistors. Typical applications include hot-swap insertion in rack-mounted servers, SSD and HDD power-rail protection, set-top box and consumer-electronics load switches, USB Type-C VBUS current limiting, and industrial 24 V backplane protection when paired with a pre-regulator. The dual-rail architecture is particularly efficient in ATX-style PC subsystems and small-form-factor systems that need both 5 V standby and 12 V main rail protection. A critical design consideration is the choice of soft-start capacitor, which sets the inrush-current profile and the fault-timer timeout. Engineers should also account for the package's thermal resistance — at full 3 A per channel, sufficient copper pour is required to keep junction temperature within the datasheet limits. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
STGAP1BS - 4A Galvanically Isolated Single Gate Driver | STMicroelectronics
The STGAP1BS is a galvanically isolated single gate driver from STMicroelectronics, designed to drive high-power IGBTs and SiC MOSFETs in industrial and automotive applications. It provides a 4A sink/source peak output current and features a 4 kV galvanic isolation barrier, making it suitable for motor drives, power supplies, and renewable energy inverters. The device is available in a wide-body SO-8W package, which offers a compact footprint while maintaining high isolation voltage. A gate driver is a power amplifier that accepts a low-power input from a controller IC and produces a high-current drive output to control the gate of a power transistor. In the hierarchy of power electronics, a gate driver sits between the control stage (microcontroller or DSP) and the power stage (IGBT or MOSFET), ensuring fast and reliable switching. The STGAP1BS integrates a galvanic isolation barrier, which separates the input and output grounds, protecting the low-voltage control circuitry from high-voltage transients and ground loops. Key features of the STGAP1BS include a 4A peak output current, 4 kV galvanic isolation, 100 V/ns common-mode transient immunity (CMTI), and a wide supply voltage range from 4.5V to 18V on the output side. The device also features a Miller clamp function to prevent spurious turn-on during high dv/dt events, and a desaturation protection input for overcurrent detection. These features make it ideal for driving SiC MOSFETs and IGBTs in high-frequency, high-efficiency power converters. The STGAP1BS uses STMicroelectronics' proprietary galvanic isolation technology, which provides robust isolation with low propagation delay (typically 75 ns) and tight part-to-part matching. The device supports both bipolar and unipolar supply configurations, allowing flexible design for various gate drive requirements. The wide-body SO-8W package ensures adequate creepage and clearance distances for 4 kV isolation, meeting IEC 60747-17 requirements. Typical applications include motor drives for industrial automation, solar inverters, uninterruptible power supplies (UPS), and electric vehicle (EV) charging stations. The STGAP1BS is also suitable for welding equipment and induction heating systems, where high reliability and fast switching are critical. When designing with the STGAP1BS, ensure proper PCB layout to minimize parasitic inductance in the gate drive loop. Use a low-ESR capacitor close to the VCC and GND pins to supply the high peak currents. The Miller clamp pin should be connected to the gate of the power transistor with a short, low-inductance trace to effectively suppress dv/dt-induced turn-on.
STGAP2HSA - 4A Galvanically Isolated Gate Driver | STMicroelectronics
The STGAP2HSA is a galvanically isolated single-channel gate driver from STMicroelectronics, designed to drive high-power IGBTs and SiC MOSFETs in industrial and automotive applications. It delivers up to 4A of peak output current with a wide supply voltage range of 3V to 18V on the primary side and 4.5V to 18V on the secondary side. The device features a 100V/ns common-mode transient immunity (CMTI) and a propagation delay of 75ns, ensuring robust performance in noisy power environments. A galvanic isolation barrier is a critical safety feature in power electronics that electrically separates the low-voltage control circuitry from the high-voltage power stage, preventing ground loops and protecting sensitive logic. The STGAP2HSA uses a capacitive isolation technology that provides reinforced isolation up to 6kV, meeting stringent safety standards for industrial motor drives and solar inverters. This isolation barrier is essential in applications where the control and power grounds are at different potentials, such as in half-bridge or full-bridge topologies. Key features of the STGAP2HSA include a 4A sink/source peak current, a 75ns propagation delay, and a 100V/ns CMTI. The device also offers a programmable dead time function, a shutdown pin for fault protection, and a separate output pin for Miller clamp, which prevents spurious turn-on of the power switch during high dv/dt events. The wide supply voltage range and rail-to-rail output make it compatible with a variety of gate drive circuits. The STGAP2HSA is built using STMicroelectronics' proprietary galvanic isolation technology, which uses a high-voltage capacitor to transfer signals across the isolation barrier. This architecture achieves low power consumption and high reliability, with a typical quiescent current of 1.5mA on the primary side. The device is available in a compact SO-8 package, which simplifies PCB layout and reduces board space in space-constrained designs. Typical applications include industrial motor drives, solar inverters, uninterruptible power supplies (UPS), and electric vehicle (EV) charging systems. In motor drives, the STGAP2HSA drives the IGBTs in the inverter stage, providing fast and reliable switching to minimize losses. In solar inverters, it drives the SiC MOSFETs in the boost converter, enabling high-frequency operation and improved efficiency. When designing with the STGAP2HSA, it is important to ensure proper PCB layout to minimize parasitic inductance in the gate drive loop. The Miller clamp output should be connected to the gate of the power switch to prevent false turn-on. Additionally, the dead time programming pin should be configured with an external resistor to set the desired dead time for the application.
STGAP2SA - 4A Galvanic Isolated Single Gate Driver | STMicroelectronics
The STGAP2SA is a galvanic isolated single gate driver manufactured by STMicroelectronics, designed to drive wide-bandgap power switches such as SiC MOSFETs and GaN HEMTs. It provides a 4A sink/source peak output current and features a 4 kV galvanic isolation barrier, making it suitable for high-voltage and high-reliability applications. The device is available in a narrow-body SO-8 package, which is compact and suitable for space-constrained designs. A galvanic isolated gate driver is a type of gate driver IC that provides electrical isolation between the input control side and the output power stage. This isolation is critical in applications where the power stage operates at high voltages, as it protects the low-voltage control circuitry from transients and ground potential differences. The STGAP2SA belongs to the category of isolated gate drivers, which are essential components in power electronics systems such as motor drives, power supplies, and inverters. Key features of the STGAP2SA include a 4A peak output current, a wide supply voltage range of 3V to 18V on the output side, and a 4 kV galvanic isolation rating. The device also offers a propagation delay of 75 ns, which is critical for high-frequency switching applications. The input side operates from 3V to 18V, and the device includes a Miller clamp function to prevent false turn-on of the power switch during high dv/dt events. The STGAP2SA utilizes STMicroelectronics' proprietary galvanic isolation technology, which provides robust isolation performance with high common-mode transient immunity (CMTI) of 100 V/ns. This ensures reliable operation in noisy environments. The device also features an under-voltage lockout (UVLO) on both the input and output sides, protecting the power switch from insufficient gate drive voltage. Typical applications for the STGAP2SA include motor drives, industrial power supplies, solar inverters, and electric vehicle (EV) charging systems. Its high output current and fast propagation delay make it suitable for driving SiC MOSFETs and GaN HEMTs in high-frequency power converters. The device is also used in welding equipment and induction heating systems where high reliability and isolation are required. When designing with the STGAP2SA, it is important to ensure proper PCB layout to minimize parasitic inductance and maintain isolation creepage distances. The Miller clamp feature should be utilized in applications with high dv/dt to prevent unintended turn-on. Additionally, the UVLO thresholds should be considered to ensure the gate driver operates within the specified voltage range.
STGAP4S - 4-Channel Isolated Gate Driver | STMicroelectronics
The STGAP4S is a 4-channel isolated gate driver from STMicroelectronics, designed for driving IGBTs and MOSFETs in high-voltage applications. It provides four independent galvanically isolated channels, each capable of delivering up to 4 A peak output current, making it suitable for three-phase inverters, motor drives, and industrial power supplies. The device operates from a supply voltage range of 4.5 V to 18 V on the logic side and 4.5 V to 18 V on the driver side, with a common-mode transient immunity (CMTI) of 100 V/ns, ensuring robust operation in noisy environments. An isolated gate driver is a type of gate driver that provides electrical isolation between the control circuitry and the power stage, protecting low-voltage logic from high-voltage transients and ground loops. It is a critical component in power electronics, enabling safe and reliable switching of power semiconductors. The STGAP4S belongs to the category of isolated gate drivers, which are part of the broader family of gate drivers, power management ICs, and semiconductor devices. Key features of the STGAP4S include a 4 A peak output current per channel, a wide supply voltage range, and a propagation delay of 100 ns. It also features an interlock function to prevent cross-conduction, a dedicated enable pin for each channel, and a fault output for system monitoring. The device is available in a 36-pin SSOP package, offering a compact solution for multi-channel gate drive applications. The STGAP4S utilizes STMicroelectronics' galvanic isolation technology, providing reinforced isolation up to 6 kV. The device includes a Miller clamp on each channel to prevent spurious turn-on of the power switch, and a desaturation protection feature for overcurrent detection. The architecture ensures high noise immunity and reliable operation in harsh industrial environments. Typical applications include motor drives, three-phase inverters, uninterruptible power supplies (UPS), and industrial power supplies. The STGAP4S is also suitable for renewable energy systems such as solar inverters and wind turbine converters. Its high CMTI and low propagation delay make it ideal for high-frequency switching applications. When designing with the STGAP4S, it is important to ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity. The device requires careful attention to the isolation barrier and creepage distances to meet safety standards. Additionally, the supply decoupling should be implemented with low-ESR capacitors close to the VCC and GND pins.
STGIPS20C60-H - 600V 20A 3-Phase IGBT IPM | STMicroelectronics
The STMicroelectronics STGIPS20C60-H is a 600 V, 20 A three-phase IGBT Intelligent Power Module (IPM) from the SLLIMM (Small Low-Loss Intelligent Molded Module) family, integrating gate drivers and short-circuit rugged trench-gate IGBTs in a 25-pin PowerDIP module measuring 0.993 inch (25.23 mm) wide. It is designed as a compact, drop-in inverter stage for variable-frequency drives and is rated for 600 V collector-emitter blocking with 20 A continuous phase current, plus an integrated bootstrap diode network, undervoltage lockout, and an on-board comparator for fault/over-current sensing via an external shunt resistor. What is an Intelligent Power Module (IPM)? An IPM is a power semiconductor module that integrates the power switches (here: IGBTs), their gate drivers, and protection features (UVLO, short-circuit, fault output) into a single isolated package. IPMs sit in the power management hierarchy between discrete IGBT/MOSFET inverter stages and higher-level integrated motor-drive modules, simplifying PCB design and shortening time-to-market for three-phase motor control applications such as HVAC compressors, washing-machine pumps, and small industrial inverters. Key features include 600 V short-circuit rugged IGBTs with trench-gate field-stop technology for low VCE(sat) and soft switching, a built-in shunt-style comparator with internal Vref and external CIN pin for hardware over-current protection, undervoltage lockout on all six driver channels, an open-drain fault output, and interlock logic that prevents shoot-through. The molded 25-PowerDIP package provides reinforced insulation and a thermally conductive substrate that simplifies heatsink attachment versus discrete through-hole designs. Typical applications include three-phase motor drives for white goods (washing machines, refrigerators, dishwasher pumps), low-power industrial variable-frequency drives (VFDs) up to about 1.5 kW, fan and compressor inverters for HVAC, and small servo pumps. The IPM's 20 A rating makes it suitable for 230 V AC mains-fed systems driving motors in the 0.37-1.1 kW range. When designing with this device, route the bootstrap capacitors close to pins U, V, W and ensure the comparator CIN pin is filtered to avoid nuisance trips. The internal Vref is non-adjustable, so over-current threshold is set by the external shunt resistor value only.
STLED316SMTR - 6-Digit LED Controller w/ Key Scan, SO-24 | STMicroelectronics
The STMicroelectronics STLED316SMTR is a serial-interfaced 6-digit LED controller with integrated key-scan, designed to drive 7-segment displays through a compact 3-wire SPI-compatible interface. It provides 14 constant-current sink outputs (8 segment lines + 6 digit lines) with 40 mA per-segment drive capability, while a 2x2 key-scan matrix supports up to 4 key inputs. The part operates from a 4.5 V to 5.5 V supply (3 V LED front-panel applications) and is offered in a 24-pin SO-24 small-outline surface-mount package with tape-and-reel packaging for high-volume assembly. What is an LED display controller? An LED display controller (sometimes called an LED driver or display bias IC) is an interface device that sits between a microcontroller and a multiplexed 7-segment or dot-matrix LED panel. It receives display data over a low-pin-count serial bus (SPI, I2C, or proprietary) and re-drives each segment at the correct duty cycle, freeing the host MCU from software multiplexing. In the broader taxonomy, LED display controllers sit beneath LED Drivers -> Power Management -> Power & Interface ICs, and they are distinct from simple LED current sinks because they integrate the timing, brightness, and key-scan logic required for human-machine interface (HMI) panels. Key features of the STLED316SMTR include 14 open-drain segment/digit outputs rated at 40 mA continuous, integrated 3-wire serial interface (clock, data, strobe) compatible with SPI mode 0, hardware key-scan with on-chip debounce, low standby current to support battery-backed panels, and a wide industrial operating temperature range. The device is also designed for minimum external BOM - only the segment current-setting resistor and decoupling caps are required, allowing very compact front-panel PCBs. Typical applications include white-good front panels (washing machines, microwaves, ovens), industrial control HMIs, point-of-sale (POS) terminals, audio equipment displays, instrument cluster readouts, and any 6-digit or smaller 7-segment user interface requiring keypad scanning. With 8 segment + 6 digit outputs the controller can drive a 6-digit 7-segment display plus decimal points, or up to 8 separate status LEDs. When designing with the STLED316SMTR, observe the absolute maximum segment current rating and choose the external RSET resistor accordingly. Ensure the 3-wire interface timing matches SPI mode 0 (CPOL=0, CPHA=0) of the host MCU, and place the decoupling capacitor as close as possible to VDD to suppress key-scan glitches during display multiplexing. This page synthesises distributor pricing, parametric comparison with same-brand and cross-brand drop-in alternatives, and practical design notes that complement - but do not replace - the official STMicroelectronics datasheet.
STLQ020PUR - 200mA Ultra-Low Iq LDO 2V-5.5V | STMicroelectronics
The STMicroelectronics STLQ020PUR is a 200 mA ultra-low quiescent current LDO linear regulator delivering an adjustable output from 0.8 V to 4.5 V from a 2 V to 5.5 V input rail, housed in a 6-pin DFN (2x2 mm) exposed-pad package. Designed for battery-powered applications, the regulator achieves a typical quiescent current that helps extend standby runtime across wireless sensor nodes, wearables, and IoT end nodes. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage by dissipating excess energy as heat, even when the input-to-output voltage differential is very small. LDOs sit within the broader hierarchy of power management ICs and are typically chosen over switching regulators in noise-sensitive or low-power applications because they introduce no switching ripple and require only small input/output capacitors. The STLQ020 belongs to the "ultra-low quiescent current" sub-category, where nanoamp-level Iq enables multi-year battery life in always-on systems. Key features of the STLQ020PUR include a 160 mV typical dropout at full 200 mA load, an enable pin that drops total current consumption to 5 nA in shutdown, and stable operation with low-ESR ceramic output capacitors as small as 1 uF. Built-in protections include thermal shutdown and short-circuit current limiting, and the exposed-pad package keeps junction temperature rise manageable at typical 50-100 mA portable loads. Internally, the regulator uses a CMOS pass element driven by a precision bandgap reference and an error amplifier optimized for low bias current. Compared with bipolar LDOs of similar rating, this CMOS architecture keeps quiescent current in the low microamp range even during dropout, which is critical when the battery voltage approaches the regulated rail and the regulator is barely regulating. Typical applications include coin-cell-powered IoT nodes, wearables and hearables, remote controls, BLE/Zigbee sensor modules, and standby rails of always-on microcontrollers. The wide enable range and tiny DFN-6 footprint also make it suitable as a post-regulator following a switching pre-regulator in space-constrained PMUs. When designing with the STLQ020PUR, keep the trace from ADJ pin to the feedback resistor divider short to minimize noise pickup, place the input/output ceramic capacitors within 1-2 mm of the package, and verify that worst-case VIN minus VOUT does not exceed the 160 mV dropout budget at peak load. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Distributor stock and pricing were verified against DigiKey and Mouser as of 2026-10-10.
STNRG011ATR - Digital Power Controller for SMPS | STMicroelectronics
The STNRG011ATR is a digital power controller from STMicroelectronics designed for switched-mode power supplies (SMPS). It integrates a digital control core with a high-voltage startup cell, making it suitable for flyback, buck, and boost converter topologies. The device operates from an input voltage range of 8.5V to 23V and provides a gate drive output capable of sourcing 0.5A and sinking 0.8A. It is housed in a 16-pin SO-16 package, offering a compact solution for power supply designs. A digital power controller is a type of power management IC that uses digital signal processing to regulate output voltage and current, replacing traditional analog control loops. It sits within the hierarchy of power management ICs, which include linear regulators, switching regulators, and digital power controllers. Digital controllers offer advantages such as programmability, higher efficiency, and better transient response compared to analog counterparts. Key features of the STNRG011ATR include a programmable switching frequency up to 1 MHz, an integrated high-voltage startup cell that reduces standby power consumption, and a digital control loop that can be configured via an I2C interface. The device also includes protection features such as overcurrent protection, overvoltage protection, and thermal shutdown, ensuring reliable operation in demanding environments. The STNRG011ATR utilizes a digital control architecture with a dedicated state machine and a configurable PID compensator. This allows designers to optimize the control loop for specific power stage characteristics without changing external components. The integrated high-voltage startup cell enables fast startup and low standby power, making it ideal for applications requiring energy efficiency standards compliance. Typical applications include AC-DC adapters, USB Power Delivery (USB-PD) chargers, and industrial power supplies. The device's digital control capability allows for precise voltage and current regulation, which is essential for USB-PD applications that require multiple output voltage levels. Its wide input voltage range and high switching frequency support compact transformer designs, reducing overall solution size. When designing with the STNRG011ATR, ensure proper layout of the high-voltage startup cell and gate drive traces to minimize parasitic inductance. The I2C interface should be isolated from high-voltage areas to prevent noise coupling. Additionally, the thermal pad should be connected to a large copper area for effective heat dissipation.
STNRG388ATR - Digital Power Controller for SMPS | STMicroelectronics
The STNRG388ATR is a digital power controller from STMicroelectronics designed for switched-mode power supplies (SMPS). It integrates a digital control core with analog peripherals to enable high-efficiency, flexible power conversion in applications such as AC-DC adapters, USB-PD chargers, and industrial power supplies. The device is offered in a compact surface-mount package, suitable for space-constrained designs. A digital power controller is a specialized microcontroller or ASIC that manages the operation of a power converter, such as a flyback or LLC resonant converter, using digital algorithms instead of analog feedback loops. It sits within the power management hierarchy, typically between the power stage (MOSFETs, transformers) and the system load, providing precise voltage and current regulation, protection, and communication interfaces. Digital controllers enable adaptive control, remote monitoring, and firmware updates, which are increasingly important in modern power systems. Key features of the STNRG388ATR include a high-performance digital core, multiple PWM outputs for driving power switches, integrated analog-to-digital converters (ADCs) for sensing voltage and current, and communication interfaces such as I2C or UART for system integration. It supports various control topologies, including flyback, LLC, and PFC, making it versatile for different power supply designs. The device also includes protection features like overvoltage, overcurrent, and overtemperature shutdown, enhancing system reliability. From a technical perspective, the STNRG388ATR leverages STMicroelectronics' expertise in digital power control, offering a balance of performance and integration. The digital core executes control algorithms with high resolution, enabling tight output regulation and fast transient response. The integrated ADCs provide accurate sensing, while the PWM generators offer flexible dead-time and frequency control. This architecture reduces external component count and simplifies design compared to analog controllers. Typical applications include AC-DC adapters for laptops and mobile devices, USB-PD chargers, LED drivers, and industrial power supplies. In these applications, the STNRG388ATR enables high efficiency, low standby power, and compliance with energy standards. Its digital nature allows for easy tuning and optimization during development, reducing time-to-market. When designing with the STNRG388ATR, engineers should consider the need for a stable power supply for the controller itself, proper decoupling of analog and digital sections, and careful layout of the power stage to minimize noise. The device's firmware must be developed and validated to ensure reliable operation across all load conditions. Reference designs and application notes from STMicroelectronics provide guidance for common topologies.
STPM066S - 66V Step-Down DC-DC Converter | STMicroelectronics
The STPM066S is a high-voltage step-down DC-DC converter from STMicroelectronics, designed to deliver efficient power conversion in industrial and automotive applications. It operates from a wide input voltage range of 4.5V to 66V, making it suitable for 12V, 24V, and 48V bus systems. The device provides a continuous output current of up to 3A, with an adjustable output voltage down to 0.8V. Housed in a compact QFN-16 package (4x4 mm), the STPM066S integrates high-side and low-side MOSFETs, reducing external component count and simplifying PCB layout. A step-down DC-DC converter, also known as a buck converter, is a type of switching regulator that efficiently reduces a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, buck converters use inductive energy storage and high-frequency switching to achieve efficiencies often exceeding 90%. This makes them essential in power management systems where thermal budget and battery life are critical. The STPM066S belongs to the broader category of power management ICs, specifically within DC-DC converters, and is a key building block in distributed power architectures. Key features of the STPM066S include a peak efficiency of 95%, a switching frequency adjustable from 200kHz to 2.2MHz, and a low quiescent current of 40uA in light-load mode. The device also offers a precision enable pin with hysteresis, soft-start to limit inrush current, and comprehensive protection features including overcurrent, overvoltage, and thermal shutdown. The integrated MOSFETs have low RDS(on) of 80mOhm (high-side) and 40mOhm (low-side), minimizing conduction losses. Technically, the STPM066S employs a current-mode control architecture, providing fast transient response and stable operation with a wide range of output capacitors. The adjustable switching frequency allows designers to optimize efficiency versus component size, while the external compensation pin offers flexibility in loop tuning. The device is available in a QFN-16 package with an exposed thermal pad, achieving a thermal resistance of 25°C/W, enabling reliable operation at high ambient temperatures. Typical applications include industrial power supplies, automotive infotainment systems, battery-powered equipment, and distributed power architectures in telecom and networking equipment. The wide input range and high efficiency make it ideal for pre-regulation in multi-rail systems, where it steps down a high-voltage bus to an intermediate rail for downstream LDOs or point-of-load converters. When designing with the STPM066S, ensure proper input and output capacitor selection to minimize voltage ripple and maintain stability. The bootstrap capacitor for the high-side driver must be placed close to the BST pin, and the feedback network should be routed away from the inductor to avoid noise coupling. Adequate copper pour on the thermal pad is essential for heat dissipation at high output currents.
STPM32TR - 2-Channel Metering AFE, 4x 24-bit Sigma-Delta ADC | STMicroelectronics
The STMicroelectronics STPM32TR is an Application-Specific Standard Product (ASSP) designed for high-accuracy power and energy metering in power-line systems. The device integrates four independent 24-bit second-order sigma-delta analog-to-digital converters with a 4 MHz output sample frequency and two embedded Programmable Gain Low-Noise Amplifiers (PGLNA), housed in a 24-pin QFN (4x4 mm) package. A metering IC (or meter IC) is a specialized mixed-signal ASSP that combines analog front-end signal conditioning, ADC conversion, and digital computation in a single device to measure electrical parameters such as active, reactive, and apparent power, RMS voltage, RMS current, and energy consumption. Within the broader taxonomy, the STPM32TR sits at the intersection of power management ICs (PMIC) and data converters, serving the smart-grid and billing-meter market segment where IEC 62053 family compliance is mandatory. Key features of the STPM32TR include four 24-bit sigma-delta ADCs providing 0.5 percent accuracy over a 1:1000 dynamic range when paired with shunt or current-transformer (CT) sensors, on-chip PGLNAs eliminating external op-amps for current channels, integrated digital signal processing for instantaneous active/reactive/apparent power calculation, and a SPI/UART digital interface for host MCU communication. The ADC supports both Rogowski coil and CT or shunt current-sensing transducers, enabling flexible sensor selection. Architecturally, the STPM32TR uses synchronous sampling on both voltage and current channels, with the modulator oversampling clock feeding a hardware DSP block that computes power line-by-line at every cycle. The integrated PGLNA stages adapt gain across the dynamic range, providing 1:1000 dynamic range without saturation in high-current transient conditions. Typical applications include single-phase and dual-phase residential smart electricity meters, energy-monitoring sub-metering modules, solar inverter DC-side monitoring, EV charging-station metering front-ends, and industrial power-quality analyzers. The 24-QFN package and operating temperature range of -40C to +85C make the part suitable for compact sealed meter housings. A critical design consideration when using the STPM32TR is the anti-aliasing filter on each input channel - typically a first-order RC network with cutoff near 10 kHz for 50/60 Hz line frequencies. Designers should also implement glitch detection on the neutral channel when the meter must detect tamper events, and validate the DC-bias calibration routine against the chosen CT or shunt current sensor. This page synthesizes distributor stock and price data, drop-in alternative parts, and application-level design notes that are not consolidated on the manufacturer datasheet alone.
STPM801 - Programmable Current Limiting Switch | STMicroelectronics
The STPM801 is a programmable current limiting switch from STMicroelectronics, designed for power distribution and protection in a wide range of applications. It integrates a high-side MOSFET switch with programmable current limiting, thermal shutdown, and under-voltage lockout, providing robust protection for downstream circuitry. The device operates from an input voltage range of 2.7V to 5.5V and can deliver up to 1.5A of continuous current, making it suitable for USB ports, hot-swap applications, and general power management. A current limiting switch is a type of power management IC that controls the flow of electrical current to a load, protecting the power source and the load from overcurrent conditions. It is a key component in the power management hierarchy, sitting between the power source (such as a battery or USB port) and the load (such as a peripheral device). By integrating a MOSFET switch, current sensing, and protection features, it simplifies circuit design and enhances system reliability. Key features of the STPM801 include programmable current limiting via an external resistor, allowing designers to set the current limit from 100mA to 1.5A. It also features a low quiescent current of 50µA, a fast 1ms turn-on time, and a low on-resistance of 70mΩ, minimizing power loss. The device includes thermal shutdown at 150°C and under-voltage lockout at 2.5V, ensuring safe operation under fault conditions. It is available in a compact SOT-23-5 package, ideal for space-constrained designs. The STPM801 uses a high-side N-channel MOSFET architecture with an internal charge pump to drive the gate, enabling low voltage drop and efficient power delivery. The current limit is set by an external resistor connected to the ILIM pin, providing flexibility for different applications. The device also features a fault output pin that signals overcurrent or thermal shutdown events, enabling system-level monitoring and control. Typical applications include USB port power distribution, hot-swap power management, and general-purpose load switching in consumer electronics, industrial control, and automotive systems. The wide input voltage range and programmable current limit make it versatile for various power distribution scenarios. When designing with the STPM801, ensure the external current-limit resistor is placed close to the ILIM pin to minimize parasitic inductance. The input and output capacitors should be placed near the device to ensure stable operation and reduce voltage transients. Proper thermal management is essential when operating at high currents, as the device dissipates power proportional to the current and voltage drop.
STR-W6072S - 72W Off-Line PWM Controller w/ MOSFET | Sanken
The Sanken STR-W6072S is an off-line switching power supply controller IC with an integrated power MOSFET, housed in a TO-220F-5 (formed-leads) package. It operates in a fixed-frequency current-mode PWM topology between 60 kHz and 74 kHz, targets flyback converter designs up to approximately 72 W output, and combines the power switch and control circuitry on a single die to reduce BOM count in cost-sensitive adapters and auxiliary supplies. A switching power supply controller (also called an AC-DC converter IC or PWM controller IC) is a semiconductor that regulates output voltage in a switch-mode power supply (SMPS) by modulating the duty cycle of an internal or external power switch at high frequency. The STR-W6072S belongs to the AC-DC converter sub-category of power management ICs (PMICs), sitting inside a flyback converter topology that is the dominant architecture for sub-100 W isolated supplies such as appliance adapters, set-top box wall warts, and standby rails for white goods. Within the device, a current-mode PWM controller IC is co-packaged with a power MOSFET, eliminating the drive loop between separate controller and MOSFET components. Key features include integrated avalanche-rated 650 V MOSFET, automatic standby/burst-mode operation for sub-100 mW standby power, built-in soft-start, over-current protection (OCP) with auto-restart, over-voltage protection (OVP), thermal shutdown, and an under-voltage lockout (UVLO) on the VCC pin. The auxiliary winding feedback topology sets output voltage indirectly via the VCC supply, removing the need for an opto-isolator and TL431 in low-cost designs. The internal architecture uses a current-mode PWM control loop with leading-edge blanking, slope compensation, and a built-in oscillator. The Sanken STR-W6000S series is positioned as a cost-performance optimized family for digital TV, monitor, and appliance standby power, where the controller integrates the high-voltage startup circuit and eliminates external bias components. Compared to a discrete UC3842 + MOSFET implementation, the STR-W6072S achieves a much smaller PCB footprint and lower standby power, at the expense of peak output power ceiling. Typical applications include AC-DC adapters up to 72 W, auxiliary/standby supplies for white goods and industrial equipment, digital TV and monitor main power supplies, set-top box power bricks, and low-cost isolated DC-DC converters. Designers typically use it in quasi-resonant or hard-switched flyback configurations with a simple single-winding auxiliary feedback. When designing with the STR-W6072S, ensure the VCC auxiliary winding is wound to deliver 15 V to 20 V at nominal load so that VCC stays within the 8.5 V to 18 V operating range. Verify that peak drain current does not exceed the integrated MOSFET rating, and add a Y-capacitor and adequate common-mode choke on the input for EMI suppression to meet EN55022 Class B. This page synthesizes Sanken's official datasheet, current distributor pricing, verified drop-in alternatives in the same TO-220F footprint, and practical flyback design notes that are not collected in the equivalent value of a single product listing.
STR-W6072S - Off-Line PWM Controller with 800V MOSFET | Sanken
The Sanken STR-W6072S is an off-line PWM controller with an integrated 800V power MOSFET in a TO-220-5 (TO-220F-6 formed leads) package, designed for AC/DC flyback converters in the 60 kHz to 74 kHz switching range. It combines a current-mode PWM controller IC and a high-voltage avalanche-rugged MOSFET on one die, enabling compact, low-component-count SMPS designs. The STR-W6000S series targets cost-sensitive auxiliary and standby power supplies where a few external parts and built-in protection are required. An off-line PWM controller with integrated MOSFET (sometimes called a Power IC or Power Supply Control IC) is a category of power-management semiconductor that replaces a discrete PWM controller plus external MOSFET pair. Within the system hierarchy, this device sits between an analog PWM controller IC and a high-voltage switching MOSFET, integrating both functions to reduce BOM count and simplify EMI layout. The integrated approach also shortens high-current loops between the MOSFET drain, the transformer primary, and the controller's current-sense input, lowering radiated EMI. The STR-W6072S operates from a universal AC input (via a rectified 100 V to 400 V DC bus) and incorporates an auto-standby function that switches between normal PWM operation and burst oscillation under light-load conditions. This auto-standby behavior yields low standby power consumption, helping designs meet modern energy-efficiency regulations for home appliances and consumer electronics. Built-in protections include over-current protection (OCP), over-voltage protection (OVP), and thermal shutdown. Internally the device uses a current-mode control topology with slope-compensated peak current sensing through the MOSFET source. The integrated MOSFET's avalanche rating is published for unclamped inductive switching events, simplifying snubber design. Operating frequency is trimmed across the 60 kHz to 74 kHz band, allowing the designer to optimize transformer size versus switching loss. According to the manufacturer datasheet, fault protection covers over-temperature and over-voltage events, with thermal shutdown typically engaging above 150 °C junction. Typical applications for the STR-W6072S include low-to-medium-power AC/DC adapters, auxiliary and standby supplies in white goods, set-top box power supplies, and small appliance SMPS modules up to roughly 50 W output. Its 800 V drain rating provides wide margin on 265 V AC rectified inputs where reflected voltage spikes can stress the primary switch. When designing with the STR-W6072S, thermal management of the TO-220-5 tab is critical: the exposed metal tab is the primary heat path and must be soldered (or clipped) to a copper area on the PCB or to a small heatsink. Drain-voltage ringing under 265 V AC operation also demands an RCD snubber sized to the leakage inductance of the flyback transformer.