Hangzhou Ruimeng Tech MS31703NA

MS31703NA is a compact single-channel H-bridge gate driver that uses four external N-channel MOSFETs to drive a bidirectional brushed DC motor. It supports supply voltages from 5.5V to 45V and offers three control modes — PH/EN, independent half-bridge, and PWM — for easy interface to controller circuits. An internal sense amplifier provides adjustable current control, and an integrated charge pump enables 100% duty cycle operation and drives an external reverse battery switch. Independent half-bridge mode supports half-bridge sharing for control of multiple DC motors, while programmable slew rate control reduces EMI. The driver features comprehensive protection functions, an integrated internal digital oscillator, and spread-spectrum clocking via an internal charge pump to minimize radiated emissions.

• Single-channel H-bridge gate driver
• Drives four external N-channel MOSFETs
• Supports 100% PWM duty cycle
• Operating supply voltage range: 5.5V to 45V
• Three control modes: PH/EN, independent half-bridge, and PWM
• Serial interface for configuration
• Adjustable slew rate control
• Independent control of each half-bridge
• Supports 1.8V, 3.3V, and 5V logic inputs
• Current sense amplifier
• Integrated PWM current regulation
• Low-power sleep mode
• Protection features: UVLO, CPUV lockout, OCP, GDF, TSD, watchdog timer, nFAULT output

• Power window lifter
• Sunroof
• Seat
• Sliding door
• Brushed DC pump