Motor chip


Chip Introduction

The SS6323H is a three-phase brushless DC motor driver. They integrated three half-bridges, including six N-channel power MOS FETs, as well as a pre-driver and gate drive power supply. The SS6323H provides enable and PWM inputs for each 1/2-H bridge.

The SS6323H is capable of continuously delivering 2A of drive current (depending on temperature and PCB conditions) with a peak current protection threshold of 7A. It uses an internal charge pump to generate the gate drive supply voltage for the high-side MOSFETs and uses trickle charge circuitry to maintain sufficient gate drive voltage to operate at 100% duty cycle. Integrated safety features include thermal shutdown, undervoltage lockout (UVLO), and overcurrent protection (OCP).

The SS6323H is available in a 24-pin 3mmx3mm QFN package with an exposed heat sink.

Chip characteristics

  • 3V-18V operating voltage range

  • Three integrated half-bridge drives

  • 2A continuous output current capability

  • On-resistance of MOSFETs: 75mΩ per MOS

  • SS6323H: ENBL&PWM control interface

  • Embedded 3.3V/100mA LDO regulated power supply

  • The built-in charge pump power supply supports PWM 100% duty cycle operation

  • Automatic synchronous rectification function

  • Integrated undervoltage lockout (UVLO) and overtemperature protection 

  • Overcurrent protection threshold up to 7A peak

  • Package type: QFN3x3-20L