A4938 Description
The A4938 is a plete 3-phase brushless DC (BLDC) motor pre-driver, supplying direct, high-current gate drive of an all N-channel power MOSFET 3-phase bridge. The device has three Hall-element inputs, a sequencer for mutation control, fixed off-time pulse width modulation (PWM) current control, and locked-rotor detection. Output current is scaled by the capability of the external MOSFETs.
A4938 Key Features
- Drives 6 N-channel MOSFETs
- Synchronous rectification for low power dissipation
- Internal UVLO and thermal shutdown circuitry
- Hall element inputs
- PWM current limiting
- Dead time protection
- FG outputs
- Standby mode
- Lock detect protection
- Overvoltage protection