DRV8434ERGER - 48V 2.5A Dual H-Bridge Motor Driver | Texas Instruments
부품 번호: DRV8434ERGER ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $2.55 | $2.55 |
| 10 | $2.29 | $22.90 |
| 100 | $2.04 | $204.00 |
| 500 | $1.79 | $895.00 |
| 1,000 | $1.59 | $1,590.00 |
DRV8434ERGER 개요
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.
드롭인 대체품: DRV8434ERGER — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: DRV8434ERGER (동일 폼 팩터 및 풋프린트) — 차이점: Control Interface, Motor Type, Package, Protection Features.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
DRV8434ARGER
✅ 드롭인✓ 재고 있음
$2.65 / 개
데이터시트 보기 →DRV8434PRGER
📋 참조 대체품 (카탈로그에 없음)
DRV8434ERGER
✅ 드롭인✓ 재고 있음
$1.59 / 개
데이터시트 보기 →DRV8436ERGER
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DRV8436ARGER
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DRV8434ERGER 최대 정격 & 전기적 특성
| Motor Type | Bipolar stepper or dual brushed DC |
| Number of H-Bridges | 2 |
| 동작 공급 전압 | 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 |
| 패키지 | VQFN-24 (RGE) 4x4 mm with exposed thermal pad |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40 C to +125 C |
| RoHS 상태 | Compliant |
DRV8434ERGER 핀 구성
| 핀 1 | GND — Ground reference |
| 핀 2 | VM — Motor power supply (4.5 V to 48 V) |
| 핀 3 | CP1 — Charge pump flying capacitor terminal 1 |
| 핀 4 | CP2 — Charge pump flying capacitor terminal 2 |
| 핀 5 | VCP — Charge pump output (decouple to VM with 1 uF) |
| 핀 6 | AOUT1 — Bridge A output 1 |
| 핀 7 | AISEN — Bridge A current sense output (analog) |
| 핀 8 | AOUT2 — Bridge A output 2 |
| 핀 9 | BOUT1 — Bridge B output 1 |
| 핀 10 | BISEN — Bridge B current sense output (analog) |
| 핀 11 | BOUT2 — Bridge B output 2 |
| 핀 12 | GND — Ground reference |
| 핀 13 | NC — Not connected (per datasheet) |
| 핀 14 | nSLEEP — Sleep mode input (active low, internal pull-down) |
| 핀 15 | nFAULT — Fault output (open-drain, active low) |
| 핀 16 | STEP — Step input (rising edge advances indexer) |
| 핀 17 | DIR — Direction input (high = current A->B, low = B->A) |
| 핀 18 | M0 — Microstepping mode select bit 0 (internal pull-down) |
| 핀 19 | M1 — Microstepping mode select bit 1 (internal pull-down) |
| 핀 20 | DECAY0 — Decay mode select bit 0 (Smart Tune / Slow / Mixed / Fast) |
| 핀 21 | DECAY1 — Decay mode select bit 1 |
| 핀 22 | VREF — Current set reference input |
| 핀 23 | V3P3 — Internal 3.3 V LDO output (decouple with 1 uF) |
| 핀 24 | GND — Ground reference (also thermal pad) |
일반적인 애플리케이션
DRV8434ERGER 적합 용도: 7 애플리케이션s: 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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
추천 제품 요약
엔지니어링 참조 데이터: DRV8434ERGER — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
주요 차별점
- Smart Tune Ripple Control decay mode (vs DRV8434ARGER)
- STEP/DIR indexer with 1/256 microstepping (vs DRV8434PRGER)
- Integrated current sense without external shunt (vs DRV8412 (HTSSOP-44 DDW))
- Wide 4.5-48 V supply range with no bootstrap (vs DRV8833 (HTSSOP-16, 10.8 V max))
설계 노트
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.
규정 준수 정보
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.
