A4937 Description
The A4937 is a 3-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 for battery voltages down to 7 V and allows the A4937 to operate with a reduced gate drive, down to 5.5 V. A bootstrap capacitor is used to provide the above battery supply voltage required for N-channel MOSFETs.
A4937 Key Features
- High current 3-phase gate drive for N-channel MOSFETs
- SPI patible serial control
- Cross-conduction protection
- Programmable dead time
- 5.5 to 50 V supply voltage range
- TTL inputs patible with 3.3 V and 5 V logic
- Extensive diagnostics output
- Low current sleep mode