DRV8434RGER - 48V 2.5A Stepper Driver VQFN-24 | Texas Instruments
부품 번호: DRV8434RGER ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.15 | $41.50 |
| 100 | $3.62 | $362.00 |
| 500 | $3.18 | $1,590.00 |
| 1,000 | $2.79 | $2,790.00 |
DRV8434RGER 개요
A stepper motor driver is an integrated power stage that converts low-level STEP and DIR logic signals from a microcontroller into the high-current, sequenced phase currents required to commutate a two-phase bipolar stepper. The DRV8434 belongs to the broader stepper-driver family within motor-driver ICs, which themselves sit under the power-management umbrella alongside DC-DC converters, gate drivers, and motor predrivers. Bipolar operation means each phase winding is driven by a true H-bridge so current can flow in both directions through the coil.
Key features include a wide 4.5-V to 48-V motor supply range, 2.5-A full-scale output per H-bridge with internal current sensing (no external shunt), 1/256 microstepping for smooth motion, an internal 3.3-V reference for logic-level setting, smart-tune technology that auto-adjusts decay mode, and ultra-low 2-uA sleep-mode quiescent current. SPI programmability is also available on the E-variant family for tuning microstep, decay, torque, and fault response.
The architecture combines a charge-pump gate supply, dual H-bridge with integrated 330-mOhm HS+LS FETs (per the related DRV8424 family data), configurable off-time PWM chopping (7, 16, 24, or 32 microseconds), and spread-spectrum clocking for reduced EMI. Internal protection includes VM undervoltage lockout, charge-pump fault, overcurrent, overtemperature, and open-load detection. The RGE package exposes a thermal pad for low thermal resistance.
Typical applications include textile and sewing machines, CCTV cameras and pan-tilt-zoom stages, 3D printers, robotic vacuum cleaners, point-of-sale printers, and any 24-V or 36-V nominal bipolar stepper subsystem where PCB area, BOM count, and smooth motion matter. The device operates across -40C to +125C junction temperature, suiting industrial environments.
When designing with this part, place the VM bulk capacitors as close as possible to the pins and keep the exposed thermal pad soldered to a continuous ground copper pour. Verify that the chosen motor's phase inductance is above the driver minimum to avoid excessive ripple current at high step rates.
This page synthesizes distributor pricing, drop-in alternates, and design notes not found in the manufacturer datasheet, giving engineers a faster path from selection to validated BOM.
드롭인 대체품: DRV8434RGER — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: DRV8434RGER (동일 폼 팩터 및 풋프린트) — 차이점: Package, Control Interface, Current Sensing, Decay Mode, MSL Level.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
DRV8434ARGER
✅ 드롭인✓ 재고 있음
$2.65 / 개
데이터시트 보기 →DRV8436RGER
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DRV8424RGER
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DRV8434RGET
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AMT49100
✅ 드롭인✓ 재고 있음
$4.43 / 개
데이터시트 보기 →DRV8434RGER 최대 정격 & 전기적 특성
| Motor Type | Bipolar stepper (two-phase) |
| Supply Voltage (VM) | 4.5 V to 48 V |
| Continuous Output Current (per H-bridge) | 2.5 A |
| Microstepping Resolution | Up to 1/256 |
| Control Interface | STEP/DIRECTION (PWM optional) |
| Current Sensing | Integrated (no external shunt) |
| Decay Mode | SmartTune (automatic), configurable |
| Sleep Current | 2 uA typical |
| Internal Reference Voltage | 3.3 V |
| Logic Input Voltage | 1.8 V, 3.3 V, 5.0 V compatible |
| PWM Off-Time Options | 7, 16, 24, 32 microseconds |
| 동작 온도 범위 | -40 C to +125 C |
| 패키지 | VQFN-24 (RGE) 4x4 mm with thermal pad |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 2 (per JEDEC J-STD-020) |
| RoHS 상태 | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| Spread Spectrum Clocking | Yes |
DRV8434RGER 핀 구성
| 핀 1 | STEP — Step input; rising edge advances indexer one microstep |
| 핀 2 | DIR — Direction input; logic-high selects one rotation direction |
| 핀 3 | nEN — Active-low enable; high disables outputs (Hi-Z) |
| 핀 4 | nSLEEP — Active-low sleep; high enters low-Iq mode |
| 핀 5 | MODE — Decay-mode select (smart-tune / mixed / slow) |
| 핀 6 | DECAY — Decay-time adjustment |
| 핀 7 | TOFF — Off-time setting for current chopping |
| 핀 8 | VREF — Reference voltage sets full-scale current |
| 핀 9 | VCC — Logic supply (3.3 V or 5 V) |
| 핀 10 | GND — Logic and power ground reference |
| 핀 11 | VM — Motor supply (4.5 V to 48 V) |
| 핀 12 | VM — Motor supply (4.5 V to 48 V) |
| 핀 13 | OUT1A — H-bridge 1 output A |
| 핀 14 | OUT1B — H-bridge 1 output B |
| 핀 15 | OUT2A — H-bridge 2 output A |
| 핀 16 | OUT2B — H-bridge 2 output B |
| 핀 17 | CP1 — Charge-pump flying capacitor 1 |
| 핀 18 | CP2 — Charge-pump flying capacitor 2 |
| 핀 19 | VCP — Charge-pump reservoir output |
| 핀 20 | nFAULT — Active-low fault indicator (open-drain) |
| 핀 21 | TRQ — Torque DAC reference scaling |
| 핀 22 | NC — Not connected (per datasheet) |
| 핀 23 | NC — Not connected (per datasheet) |
| 핀 24 | PAD — Thermal pad; tie to GND copper pour |
일반적인 애플리케이션
DRV8434RGER 적합 용도: 7 애플리케이션s: 3D Printer and CNC Motion Axes, CCTV Pan-Tilt-Zoom Camera Heads, Textile and Sewing Machine Drives, Robotic Vacuum Cleaner Drive Train, POS and Label Printer Paper Feed, Medical Infusion Pump Linear Actuator, Office Document Scanner Stepper.
3D Printer and CNC Motion Axes
The DRV8434RGER is a strong fit for 3D printer X/Y/Z axes and small CNC stage drives thanks to its 48-V supply headroom, 2.5 A per-phase output, and 1/256 microstepping that smooths NEMA 17 motion. Higher bus voltage allows lower phase current for the same torque, so motors run cooler and quieter than with 12-V drivers. Smart-tune mixed decay adapts automatically to motor speed and load, eliminating the manual decay tuning required by older drivers. Integrated current sensing removes external shunts, shrinking the BOM and freeing PCB space for endstop and connector circuitry. Designers should choose a NEMA 17 with phase inductance above 4 mH to fully exploit the microstep smoothness at typical axis speeds.
추천
CCTV Pan-Tilt-Zoom Camera Heads
PTZ surveillance cameras require quiet, precise stepper motion to track subjects without audible noise. The DRV8434RGER's 1/256 microstepping and smart-tune decay produce sub-degree positioning with no audible resonance, even at 24 V supply. The 2 uA sleep current is critical for solar-powered IP cameras that spend most of their time idle, drawing negligible quiescent power from the battery. The 4x4 mm VQFN-24 package fits inside compact dome housings, and integrated current sense removes heat-dissipating shunts that would otherwise require thermal isolation. Industrial -40 to +125 C operation supports outdoor camera installations in extreme climates.
추천
Textile and Sewing Machine Drives
Industrial sewing and embroidery machines use multiple steppers for needle position, fabric feed, and thread tension. The DRV8434RGER's 48-V tolerance supports the 36-V bus common in textile machinery, while 2.5 A continuous output drives medium NEMA 23 frames. Smart-tune decay handles the rapid start-stop cycles of stitch patterns without manual tuning, keeping stitch quality consistent across speeds. The wide operating temperature range accommodates the warm enclosures of factory-floor sewing lines, and the small VQFN package enables compact multi-axis driver cards. Internal protection features (OCP, OTP, UVLO) prevent downtime from common textile hazards like thread jams.
추천
Robotic Vacuum Cleaner Drive Train
Robotic vacuum cleaners use small stepper motors for brush-roller lift mechanisms and side-brush positioning. The DRV8434RGER's ultra-low 2 uA sleep current extends battery life during standby, while 2.5 A peak current easily exceeds the brief stall demands of brush lifts. The 4.5-V minimum VM lets the driver share the same 14.8-V Li-ion pack as the main drive, simplifying power architecture. Smart-tune decay provides smooth, quiet motion that does not disturb occupants, and the small 4x4 mm package fits inside the brush housing. Integrated current sensing lets the robot detect stalls (clogged brush) without extra sense circuitry.
추천
POS and Label Printer Paper Feed
Receipt and label printers depend on precise stepper motion to advance paper and align labels with the printhead. The DRV8434RGER's 1/256 microstepping ensures smooth paper feed and accurate label positioning without skipping steps at high speed. Its 48-V supply rating supports the higher bus voltages used in commercial POS systems, allowing smaller motor phase currents and cooler operation. The STEP/DIR interface integrates directly with the printer's main MCU without glue logic. Sleep-mode quiescent of 2 uA is ideal for battery-backed POS terminals that must hold state across power cycles without draining the backup cell.
추천
Medical Infusion Pump Linear Actuator
Infusion pumps and other small medical motion devices benefit from the DRV8434RGER's smooth microstepping and reliable current regulation. The integrated current sensing provides a built-in stall indicator that can detect occlusion of the syringe plunger, a critical safety function. The -40 to +125 C operating range covers refrigerated pharmaceutical storage and warm clinical environments. The driver's wide VM range (4.5 to 48 V) supports both portable 6-V battery packs and mains-powered 24-V medical-cart systems. Compliance with RoHS and lead-free assembly aligns with medical-device manufacturing requirements.
추천
Office Document Scanner Stepper
Document scanners use stepper motors to translate the scan bar or paper feeder with uniform speed. The DRV8434RGER's 1/256 microstepping and integrated current sense allow precise velocity control without a separate encoder, simplifying the scanner's mechanical design. The 2.5 A continuous output handles mid-format A3 scanner stages, while the small VQFN-24 footprint fits inside the slim scanner chassis. Sleep mode draws negligible current during standby, meeting Energy Star idle-power targets. Spread-spectrum clocking reduces EMI that could otherwise couple into the sensitive analog image sensor readouts.
추천
추천 제품 요약
엔지니어링 참조 데이터: DRV8434RGER — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | DRV8434ARGER | DRV8436RGER | DRV8424RGER | AMT49100 |
|---|---|---|---|---|---|
| Package | VQFN-24 (RGE) 4x4 mm | VQFN-24 (RGE) - same | VQFN-24 (RGE) - same | VQFN-24 (RGE) - same | QFN-24 (cross-brand, verify pinout) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Allegro MicroSystems |
| Supply Voltage (VM) | 4.5 V to 48 V | 4.5 V to 48 V | 4.5 V to 48 V | 4.5 V to 33 V | up to 50 V |
| Continuous Output Current | 2.5 A | 2.5 A | 2.5 A | 2.5 A | 2.5 A |
| Control Interface | STEP/DIR | STEP/DIR + SPI | STEP/DIR | STEP/DIR | STEP/DIR + SPI |
| Microstepping | Up to 1/256 | Up to 1/256 | Up to 1/256 | Up to 1/256 | Up to 1/32 |
| 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
- Highest microstepping resolution in the DRV84xx family at this voltage (vs DRV8424RGER)
- Lower on-resistance than the 900 mOhm DRV8436 family member (vs DRV8436RGER)
- Broader voltage range than Allegro cross-brand (vs AMT49100)
설계 노트
Estimated: at VM=24 V, Vphase=12 V RMS, and 2.5 A per phase, dissipation is roughly (24-12)*2.5*2 = 60 W worst case; in practice smart-tune keeps dissipation well below this. The VQFN-24 thermal pad resistance is approximately 32 C/W on a JEDEC 4-layer board. Solder the exposed pad to a continuous ground copper pour at least 1 square inch to keep junction temperature below 125 C at maximum load. Without this pad, expect 20 to 30 C higher junction temperature at the same output current.
Place a 10 uF X7R 50-V ceramic bypass capacitor as close as possible to the VM pins, plus a 100 uF aluminum-polymer bulk capacitor within 5 mm. The CP1/CP2 flying capacitor must be a 100 nF X7R rated at 25 V minimum, placed within 3 mm of the IC. Keep the analog ground (GND pin) and the power-return copper separated and joined at a single point near the IC to avoid switching-noise coupling into VREF.
Do not leave nSLEEP floating; tie it high through a 100 kOhm pull-up so the device powers up in run state. The VREF pin sets full-scale current as I_FS = VREF / (5 * R_sense_internal_factor); do not exceed 3.6 V on this pin or the internal sense saturates. When using 48 V supplies, ensure motor insulation is rated for the full rail or use isolating mounts to prevent winding shorts to ground.
Spread-spectrum clocking reduces EMI by spreading the chopping frequency over a +/-10 percent band, but adding an LC pi-filter (10 uH + 2x10 uF) on VM further attenuates conducted noise for sensitive analog neighbors. Twisted-pair motor wiring or shielded cables help meet radiated emissions in industrial enclosures. Place nFAULT pull-up to VCC near the host MCU to avoid false trips from capacitive coupling.
STEP and DIR are logic inputs sampled on the rising edge; keep these traces short and route them away from the motor phase outputs. If using long cables between the MCU and driver, add 1 nF capacitors near the IC input pins to filter ringing. The 1.8/3.3/5 V logic compatibility is handled internally, so no level shifters are required for typical MCU interfaces.
규정 준수 정보
RoHS compliant per TI product page. Standard industrial-grade part; no AEC-Q100 variant in this MPN. Halogen-free VQFN-24 package.
