Document
A3935 3-Phase Power MOSFET Controller for Automotive Applications
Features and Benefits
▪ Drives wide range of N-channel MOSFETs in 3-phase bridges ▪ PFM boost converter for use with low-voltage battery supplies ▪ Internal LDO regulator for gate-driver supply ▪ Bootstrap circuits for high-side gate drivers ▪ Current monitor output ▪ Adjustable battery overvoltage detection ▪ Diagnostic outputs ▪ Motor lead short-to-battery, short-to-ground, and bridge-
open protection ▪ Undervoltage protection ▪ –40°C to 150°C TJ operation ▪ Thermal shutdown
Package 36-pin QSOP (LQ):
Approximate scale 1:1
Description
TheA3935 is designed specifically for automotive applications that require high-power motors. Each provides six high-current gate drive outputs capable of driving a wide range of N-channel power MOSFETs.
A requirement of automotive systems is steady operation over a varying battery input range. The A3935 integrates a pulsefrequency modulated boost converter to c.