A3938 Description
The A3938 is a three-phase, brushless DC motor controller. It has a high-current gate drive capability that allows driving of a wide range of power MOSFETs and can support motor supply voltages to 50 V. The A3938 integrates a bootstrapped high-side driver to minimize the external ponent count required to drive N-channel MOSFET drivers.
A3938 Key Features
- Drives a wide range of N-channel MOSFETs
- Low-side synchronous rectification
- Power MOSFET protection
- Adjustable dead time for cross-conduction protection
- Selectable coast or dynamic brake on power-down or
- Fast/slow current decay modes
- Internal PWM current control
- Motor lead short-to-ground protection
- Internal 5 V regulator
- Fault diagnostic output