TI DRV8705HQRHBRQ1

DRV8705-Q1 is a highly integrated H-bridge gate driver capable of driving high-side and low-side N-channel power MOSFETs. It generates appropriate gate drive voltages using an integrated charge pump multiplier (for the high side) and a linear regulator (for the low side). The device reduces system cost and improves reliability through a smart gate drive architecture. The gate driver optimizes dead time to prevent shoot-through, controls EMI reduction via adjustable gate drive current, and prevents drain-source and gate short-circuit conditions through VDS and VGS monitors. A low-side shunt amplifier supports current sensing to measure motor current and provide feedback to an external controller for current limiting or stall detection. The DRV8705-Q1 offers a comprehensive set of protection features to ensure stable system operation. These include undervoltage and overvoltage monitoring for the power supply and charge pump, 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.

• AEC-Q100 qualified for automotive applications: Temperature Grade 1: -40°C to +125°C, TA
• Functional Safety documentation available to support functional safety system design
• 4.9V to 37V (40V absolute maximum) operating voltage range
• Doubler charge pump enables 100% PWM
• Half-bridge and H-bridge control modes
• H-bridge smart gate driver pin-to-pin gate driver models
• Adjustable slew rate control
• 0.5 mA to 62 mA peak source current output
• 0.5 mA to 62 mA peak sink current output
• Integrated dead-time handshaking
• Low-side current shunt amplifier
• Adjustable gain settings (10, 20, 40, 80 V/V)
• Integrated feedback resistors
• Adjustable PWM blanking scheme
• Multiple interface options available
• SPI: detailed configuration and diagnostics
• H/W: simplified control with fewer MCU pins
• Spread spectrum clock for reduced EMI
• Compact VQFN package with wettable flanks
• Integrated protection features
• Dedicated driver disable pin (DRVOFF)
• Power supply and regulator voltage monitors
• MOSFET VDS overcurrent monitor
• MOSFET VGS gate fault monitor
• Charge pump offline for reverse polarity MOSFET
• Open-load and short-circuit diagnostics
• Device thermal warning and thermal shutdown
• Fault condition interrupt pin (nFAULT)

• Automotive brushed DC motors
• Solenoids and relays
• Power window lifters and sliding doors
• Power sunroofs
• Power seat modules
• Power trunk and tailgate
• BDC fuel pumps, water pumps, oil pumps
• Windshield wipers