DRV8434ERGER - 48V 2.5A Dual H-Bridge Motor Driver | Texas Instruments
MPN： DRV8434ERGER ✓ 啟用中DRV8434ERGER 概覽
What is a dual H-bridge motor driver? A dual H-bridge motor driver is an integrated power IC that contains two complete H-bridge output stages on one die, each capable of switching current bidirectionally through a DC motor winding. Two H-bridges together can drive one bipolar stepper (four-wire) motor, one BLDC motor with external commutation logic, or two independent brushed DC motors. The H-bridge topology sits within the broader category of motor driver ICs, which are themselves a sub-category of power management semiconductors. Compared to discrete MOSFET H-bridges, integrated drivers add on-chip current sensing, PWM control logic, fault protection, and (in this case) an integrated microstepping indexer.
Key features of the DRV8434ERGER include: 4.5 V to 48 V wide operating supply range, 2.5 A full-scale output current per H-bridge with internal current-sense amplification, programmable decay modes (Smart Tune, Slow, Mixed, Fast), 1 to 1/256 native microstepping without external logic, and a dedicated nSLEEP pin for low-power standby. The Smart Tune decay algorithm automatically selects between slow and fast decay to minimize ripple current and audible noise, a key benefit for office automation and home appliance designs.
Technically, the DRV8434E family uses a charge-pump-generated gate drive for the high-side N-FETs, eliminating the need for a bootstrap capacitor. The integrated current sense uses an internal sense-FET topology, removing the external sense resistor and shrinking the BOM. STEP/DIR inputs allow simple host-MCU control of position, while off-the-shelf step rates from full-step to 1/256 microstep are selectable via the M0/M1 pins.
Typical applications include 3D printers, CNC routers, textile and sewing machines, office automation (printers, scanners, copiers), ATM and POS cash handlers, video surveillance PTZ cameras, factory automation stages, and any small bipolar stepper or dual brushed DC motor up to 2.5 A per winding. The DRV8434ERGER is also suitable for battery-powered robotics using two brushed DC motors.
When designing with this part, choose bulk input capacitance (at least 47 uF) sized for the worst-case motor back-EMF, and connect the exposed thermal pad to a continuous ground copper pour. Configure decay mode to Smart Tune Ripple Control for most stepper loads to minimize audible noise and torque ripple.
直接替換替代品，適用於 DRV8434ERGER — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： DRV8434ERGER （相同外形與佔位） — 差異在於 Control Interface, Motor Type, Package, Protection Features.
DRV8434ARGER
✅ 直接替換聯絡詢價
查看資料表 →DRV8434PRGER
📋 參考替代品（不在目錄中）
DRV8434ERGER
✅ 直接替換聯絡詢價
查看資料表 →DRV8436ERGER
✅ 直接替換📋 參考替代品（不在目錄中）
DRV8436ARGER
✅ 直接替換📋 參考替代品（不在目錄中）
DRV8434ERGER 最大額定值與電氣特性
| Motor Type | Bipolar stepper or dual brushed DC |
| Number of H-Bridges | 2 |
| 工作電源電壓 | 4.5 V to 48 V |
| Continuous Output Current (per H-bridge) | 2.5 A |
| Integrated Current Sense | Yes (internal sense-FET, no external shunt) |
| Microstepping Indexer | Full-step to 1/256 native |
| Decay Modes | Smart Tune, Slow, Mixed, Fast (selectable) |
| Control Interface | STEP/DIR + M0/M1 |
| Sleep Mode Pin | Yes (nSLEEP) |
| Fault Output | Yes (nFAULT, open-drain) |
| Protection Features | UVLO, OCP, short-circuit, open load, thermal shutdown, charge pump fault |
| 封裝 | VQFN-24 (RGE) 4x4 mm with exposed thermal pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40 C to +125 C |
| RoHS 狀態 | Compliant |
DRV8434ERGER 腳位配置
| 腳位 1 | GND — Ground reference |
| 腳位 2 | VM — Motor power supply (4.5 V to 48 V) |
| 腳位 3 | CP1 — Charge pump flying capacitor terminal 1 |
| 腳位 4 | CP2 — Charge pump flying capacitor terminal 2 |
| 腳位 5 | VCP — Charge pump output (decouple to VM with 1 uF) |
| 腳位 6 | AOUT1 — Bridge A output 1 |
| 腳位 7 | AISEN — Bridge A current sense output (analog) |
| 腳位 8 | AOUT2 — Bridge A output 2 |
| 腳位 9 | BOUT1 — Bridge B output 1 |
| 腳位 10 | BISEN — Bridge B current sense output (analog) |
| 腳位 11 | BOUT2 — Bridge B output 2 |
| 腳位 12 | GND — Ground reference |
| 腳位 13 | NC — Not connected (per datasheet) |
| 腳位 14 | nSLEEP — Sleep mode input (active low, internal pull-down) |
| 腳位 15 | nFAULT — Fault output (open-drain, active low) |
| 腳位 16 | STEP — Step input (rising edge advances indexer) |
| 腳位 17 | DIR — Direction input (high = current A->B, low = B->A) |
| 腳位 18 | M0 — Microstepping mode select bit 0 (internal pull-down) |
| 腳位 19 | M1 — Microstepping mode select bit 1 (internal pull-down) |
| 腳位 20 | DECAY0 — Decay mode select bit 0 (Smart Tune / Slow / Mixed / Fast) |
| 腳位 21 | DECAY1 — Decay mode select bit 1 |
| 腳位 22 | VREF — Current set reference input |
| 腳位 23 | V3P3 — Internal 3.3 V LDO output (decouple with 1 uF) |
| 腳位 24 | GND — Ground reference (also thermal pad) |
典型應用
DRV8434ERGER 適用於 7 應用s: 3D Printer Stepper Axes, CNC Router and Engraver, Office Automation - Printers and Scanners, Surveillance PTZ Camera, Textile and Sewing Machine, Battery-Powered Robotics, ATM and POS Cash Handler.
3D Printer Stepper Axes
The DRV8434ERGER's 48 V / 2.5 A envelope and 1/256 native microstepping are ideal for 3D printer X/Y/Z stepper axes where smooth motion, fine resolution, and quiet operation are mandatory. Smart Tune Ripple Control decay automatically regulates the current ripple at low step rates, eliminating the audible mid-band resonance that plagues printers using fixed-decay drivers. Compared to a DRV8825-based discrete bridge, the DRV8434ERGER removes the external current-sense resistors and the bootstrap capacitors, shrinking the BOM. Place the part adjacent to the stepper motor connector and route AOUT1/AOUT2/BOUT1/BOUT2 as differential pairs to keep switching transients out of the MCU logic ground.
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CNC Router and Engraver
For CNC routers and laser engravers driving NEMA 23 bipolar steppers, the DRV8434ERGER's 48 V supply headroom allows high step rates (>1000 RPM) without losing torque. The integrated current sense feeds the host MCU a proportional voltage on xISEN, enabling closed-loop stall detection - critical for protecting a spindle from a stalled axis. Per the TI DRV8434E datasheet, the device tolerates 48 V transient back-EMF when decelerating heavy gantries. Use 100 uF / 63 V bulk aluminum-polymer capacitance on VM, sized to absorb the regenerative energy that flows back during rapid deceleration.
推薦
Office Automation - Printers and Scanners
Office multifunction printers use a paper-transport stepper plus a scanner carriage brushed-DC motor; the DRV8434ERGER drives both simultaneously from one IC. Smart Tune decay minimizes the high-frequency acoustic noise that would otherwise bleed through the printer's plastic enclosure - a key spec for office equipment where audible noise is regulated. The nSLEEP pin lets the host drop Iq below 5 uA between print jobs, meeting Energy Star standby budgets. Integrated OCP and thermal shutdown protect the IC when paper jams stall the carriage motor.
推薦
Surveillance PTZ Camera
PTZ (pan-tilt-zoom) IP cameras use two brushed DC motors for pan and tilt motion; the DRV8434ERGER drives both from one IC with 2.5 A per channel - enough for outdoor PTZ housings. The 48 V supply tolerance is useful for cameras powered over 24 V or 48 V PoE/PoE+ rails. The integrated current sense enables host detection of mechanical obstructions (camera bumped, vandalized), prompting the firmware to back off and alert. nSLEEP keeps standby power below the EU ecodesign limits for network-connected cameras.
推薦
Textile and Sewing Machine
Industrial sewing and embroidery machines use one or two bipolar steppers plus a feed dog brushed DC motor - the DRV8434ERGER's two H-bridges cover both. Smart Tune decay eliminates the high-pitch whine that fixed-decay drivers produce at the sewing head's resonant frequencies, improving operator comfort in long production shifts. The 4.5 V minimum supply is low enough to run the same driver from a 5 V USB-C PD source in portable embroidery equipment. Per TI datasheet, the exposed thermal pad on the 4x4 mm VQFN gives the thermal headroom needed for sustained 2 A operation in a sealed machine housing.
推薦
Battery-Powered Robotics
For battery-powered educational and small-service robots using two brushed DC gearmotors, the DRV8434ERGER's wide 4.5-48 V supply range accepts 1S-10S Li-ion packs directly, eliminating a pre-regulator. The nSLEEP pin drops Iq to microampere levels when the robot is idle, preserving battery life - the integrated solution saves the host MCU a separate low-side switch for sleep. The DRV8434E variant's high 2.5 A current handles wheel motors up to ~50 W mechanical output, while the internal current-sense amplifier feeds back to the MCU for closed-loop velocity control without external shunt resistors.
推薦
ATM and POS Cash Handler
ATMs and POS terminals use stepper motors to drive cash-dispenser rollers and receipt printers. The DRV8434ERGER's 1/256 microstepping eliminates the audible chatter that fixed-step drivers emit during the dispenser's transport phase, reducing the noise floor inside a retail environment. The 48 V supply tolerance allows direct connection to a 24 V industrial backplane common in banking equipment racks. Smart Tune decay combined with the integrated current sense enables jam detection - if a bill sticks, the host sees a current spike on xISEN within microseconds and triggers a reverse-feed without damage to the mechanism.
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推薦產品摘要
工程參考資料，適用於 DRV8434ERGER — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DRV8434ARGER | DRV8434PRGER | DRV8436ERGER | DRV8436ARGER |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-24 (RGE) 4x4 mm | VQFN-24 (RGE) 4x4 mm - same | VQFN-24 (RGE) 4x4 mm - same | VQFN-24 (RGE) 4x4 mm - same | VQFN-24 (RGE) 4x4 mm - same |
| Operating Supply Voltage | 4.5 V to 48 V | 4.5 V to 48 V | 4.5 V to 48 V | 4.5 V to 48 V | 4.5 V to 48 V |
| Continuous Output Current per Bridge | 2.5 A | 2.5 A | 2.5 A | 3.0 A | 3.0 A |
| Control Interface | STEP/DIR + M0/M1 indexer | STEP/DIR + M0/M1 indexer | PH/EN parallel PWM (no indexer) | STEP/DIR + M0/M1 indexer | STEP/DIR + M0/M1 indexer |
| Decay Modes | Smart Tune + Slow/Mixed/Fast | Slow/Mixed/Fast only (no Smart Tune) | Smart Tune + Slow/Mixed/Fast | Smart Tune + Slow/Mixed/Fast | Slow/Mixed/Fast only (no Smart Tune) |
| Microstepping Resolution | Full-step to 1/256 native | Full-step to 1/256 native | N/A (parallel PWM input) | Full-step to 1/256 native | Full-step to 1/256 native |
| Integrated Current Sense | Yes (internal sense-FET) | Yes (internal sense-FET) | Yes (internal sense-FET) | Yes (internal sense-FET) | Yes (internal sense-FET) |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
主要差異化特點
- Smart Tune Ripple Control decay mode (對比DRV8434ARGER)
- STEP/DIR indexer with 1/256 microstepping (對比DRV8434PRGER)
- Integrated current sense without external shunt (對比DRV8412 (HTSSOP-44 DDW))
- Wide 4.5-48 V supply range with no bootstrap (對比DRV8833 (HTSSOP-16, 10.8 V max))
設計說明
At VM = 24 V and 2.5 A continuous per bridge, the DRV8434ERGER dissipates approximately 1.5 W with a typical 250 mOhm total RDS(on). The VQFN-24 (RGE) exposed thermal pad has a theta_JA near 35 C/W on a 4-layer 1-oz JEDEC test board, producing a 53 C junction rise above ambient - acceptable without a heatsink at 1 A continuous, but a continuous ground copper pour of at least 1 square inch is required for sustained 2.5 A operation. Above 2 A continuous per bridge, add an additional inner-layer ground flood stitched with thermal vias on 1 mm pitch directly under the e-pad.
Place the 100 nF VM decoupling capacitor as close as possible to the VM and GND pins, and add a 47 uF / 63 V (or higher) bulk aluminum-polymer capacitor on VM sized to absorb the worst-case regenerative energy during deceleration. The CP1/CP2 charge-pump flying capacitor must be a 100 nF X7R placed within 5 mm of the IC; do not use Y5V. Route AOUT1/AOUT2 and BOUT1/BOUT2 as matched-length differential pairs with at least 30 mil trace width and 30 mil clearance to limit switching transients coupled into adjacent signal lines.
Do not omit the VREF decoupling capacitor (100 nF X7R to GND); without it the current set point becomes noisy and the motor exhibits audible torque ripple. Ensure STEP pulses have rise/fall times below 100 ns - long edges cause indexer glitches that manifest as missed microsteps at high step rates. The nFAULT pin is open-drain and requires an external 10 kOhm pull-up to V3P3; do not leave it floating, because spurious nFAULT assertions will confuse the host state machine. For 3D printer firmware, set decay mode to Smart Tune Ripple Control (DECAY0=DECAY1=high) for the smoothest motion and lowest audible noise; use Smart Tune Dynamic Decay (DECAY0=high, DECAY1=low) for higher step rates where faster response is needed.
Choose bulk input capacitance on VM sized for the worst-case back-EMF energy: C_bulk = (L_motor * I_peak^2) / (V_clamp^2 - V_nominal^2). For a typical NEMA 17 stepper (L = 2 mH) at 2.5 A peak with a 60 V transient clamp on a 36 V nominal supply, C_bulk >= 30 uF is required; 47 uF aluminum-polymer with low ESR is recommended. Place a TVS diode (e.g., SMAJ48CA) on VM to clamp regenerative voltage below the 60 V absolute maximum.
合規資訊
RoHS compliant and lead-free VQFN-24 RGE finish per TI product page. Not AEC-Q100 qualified; for automotive motion control see DRV8434-Q1 portfolio. REACH compliant per TI materials declaration.
