Description:

The DRV871x-Q1 family of devices is a highly integrated multi-channel gate driver suitable for driving multiple motors or loads. The device integrates 4 (DRV8714-Q1) or 8 (DRV8718-Q1) half-bridge gate drivers, driver power supplies, current shunt amplifiers, and protection monitors to reduce overall system complexity, cost, and size. The smart gate drive architecture manages dead time to prevent shoot-through, controls slew rate to reduce electromagnetic interference (EMI), and optimizes propagation delay to improve performance. The available input modes enable independent half-bridge or H-bridge control. Four PWM inputs can be multiplexed across different drivers and provide SPI control. The wide common-mode shunt amplifiers feature in-line current sensing, enabling continuous motor current measurement even during recirculation. If in-line sensing is not required, the amplifiers can be configured for low-side or high-side sensing. The devices offer a comprehensive set of protection features for robust system operation. These include undervoltage and overvoltage monitoring, VDS overcurrent and VGS gate-fault monitoring for external MOSFETs, offline open-load and short-circuit diagnostics, and internal thermal warning and thermal shutdown protection.

Features:

• AEC-Q100 qualified for automotive applications:

– Temperature Grade 1: –40°C to +125°C, TA

• Multi-channel half-bridge gate drivers

– 4 and 8 half-bridge driver models (pin-to-pin compatible)

– 4.9V to 37V (40V absolute maximum) operating voltage range

– 4 PWM inputs with output mapping

– Triple charge pump for 100% PWM

– Half-bridge, H-bridge, and SPI control modes

• Smart multi-level gate drive architecture

– Adjustable slew rate control

– Adaptive propagation delay control

– 50µA to 62mA peak source current

– 50µA to 62mA peak sink current

– Integrated dead-time handshake

• 2 current shunt amplifiers with wide common-mode voltage range

– Supports in-line, high-side, or low-side sensing

– Adjustable gain settings (10, 20, 40, 80 V/V)

• Multiple interface options available

– SPI: Detailed configuration and diagnostics

– H/W: Simplified control and fewer MCU pins

• Compact VQFN package with wettable flanks

• Integrated protection features

– Dedicated driver disable pin (DRVOFF)

– Low IQ sleep mode and motor braking (BRAKE)

– Power supply and regulator voltage monitors

– MOSFET VDS overcurrent monitor

– MOSFET VGS gate-fault monitor

– Charge pump for reverse polarity MOSFETs

– Offline open-load and short-circuit diagnostics

– Device thermal warning and thermal shutdown

– Window watchdog timer

– Fault condition interrupt pin (nFAULT)

Applications:

• Automotive brushed DC motors

• Power seat modules

• Power liftgate and trunk applications

• Door modules

• Body control modules

• Power sunroof

• Transmission and engine control modules