A4939 Description
The A4939 is a three-phase controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications. A unique charge pump regulator provides full (>10 V) gate drive at battery voltages down to 7 V and allows the A4939 to operate with reduced gate drive at battery voltages down to 5.5 V. A bootstrap capacitor is used to provide the above battery supply voltage required for...
A4939 Key Features
- High current 3-phase gate drive for N-channel MOSFETs
- Cross-conduction protection
- 5.5 to 50 V supply voltage range
- Regulated logic supply voltage output option
- Motor phase short to supply and short to ground detection
- Undervoltage, overtemperature monitors
- Low current Sleep mode option