DRV8705-Q1中文资料Automotive, 40-V, H-bridge Smart Gate Driver w/offline diagnostics数据手册TI规格书

描述 Description

The DRV8705-Q1 is a highly integrated H-bridge gate driver, capable of driving high-side and low-side N-channel power MOSFETs. It generates the proper gate drive voltages using an integrated doubler charge pump for the high-side and a linear regulator for the low-side.

The device uses a smart gate drive architecture to reduce system cost and improve reliability. The gate driver optimizes dead time to avoid shoot-through conditions, provides control to decreasing electromagnetic interference (EMI) through adjustable gate drive current, and protects against drain to source and gate short conditions with VDS and VGS monitors.

A low-side shunt amplifier allows for current sensing in order to measure motor current and provide feedback to the external controller for current limiting or stall detection.

The DRV8705-Q1 provide an array of protection features to ensure robust system operation. These include under and overvoltage monitors for the power supply and charge pump, VDS overcurrent and VGS gate fault monitors for the external MOSFETs, offline open load and short circuit diagnostics, and internal thermal warning and shutdown protection.

特性 Features

• AEC-Q100 qualified for automotive applications:
• Functional Safety-Capable
• H-bridge smart gate driver
• Doubler charge pump for 100% PWM
• Pin to pin gate driver variants
• DRV8706-Q1: H-bridge with inline amplifier
• Smart gate drive architecture
• 0.5-mA to 62-mA peak source current output
• Integrated dead-time handshaking
• Low-side current shunt amplifier
• Integrated feedback resistors
• Multiple interface options available
• H/W: Simplified control and less MCU pins
• Spread spectrum clocking for EMI reduction
• Integrated protection features
• Supply and regulator voltage monitors
• MOSFET VGS gate fault monitors
• Offline open load and short circuit diagnostics
• Fault condition interrupt pin (nFAULT)