DRV81646-Q1
Automotive 70V, 3-A, Quad low-side Motor Driver with PWM/SPI and Configurable Slew Rate, CLIM, COD
DRV81646-Q1
- Four-channel integrated low-side switches
- 140mΩ RDS(ON) at 25°C
- Operating supply voltage range: 4.5V to 65V (70V absolute maximum)
- Selectable current limit from 0.5A up to 4A
- Fast PWM switching up to 500kHz
- Flexible interface options:
- Hardware interface with independent channel PWM input
- SPI enables reduction in GPIO and isolation overhead for high channel count designs
- Integrated catch diodes for flexible decay modes with optional external TVS/Zener diode as alternate current path on switch turnoff
- Slew rate configurable (100ns – 1500ns) enables both slow/fast switching applications
- Diagnostic feedback
- MCU fault interrupt signal (nFAULT)
- Per channel fault report available through SPI
- Protection Features
- User settable current limit
- Independent overtemperature and overcurrent protection for each channel
- Configurable overcurrent cut-off delay (COD): 0.5ms - 2ms
The DRV81646-Q1 is a 4.5V to 65V, four-channel low-side driver with 140mΩ RDS(ON) per switch. An integrated freewheeling diode on each channel connects to the VCLAMP pin, enabling current recirculation or fast inductive load turn-off via an external TVS diode.
Control is available via hardware GPIO or 4-wire SPI. Each channel includes independent overtemperature protection. A single resistor on the ILIM pin globally sets the analog current limit threshold across all channels; an optional cut-off delay (COD) limits overcurrent event duration. Output slew rate is also set globally via the RSLEW/CNTL pin. An INRUSH mode temporarily raises the current limit threshold for capacitive load startup.
An nFAULT output pin indicates fault conditions. In SPI mode, per-channel fault status registers allow rapid fault identification and response.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 날짜 |
|---|---|---|---|---|
| * | Data sheet | DRV81646-Q1 Quad low side switches datasheet | PDF | HTML | 2026/05/26 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.