Automotive proportional solenoid drive with highly accurate current sensor reference design
Description
This reference design demonstrates precise proportional solenoid drive using a simple push-pull output comparator and highly-accurate: integrated current shunt monitor. Precise and accurate control of proportional solenoids is especially necessary in the automatic transmission of a vehicle for smoother drivability. This design addresses two of the main factors that affect the precise position of a solenoid: drive and current-sense accuracy over temperature.
Features
- Current sense accuracy of 0.5% (FSR)Drive frequency and duty cycle: 1 kHzIntegrated shunt facilitates more accuracy over a larger dynamic rangeLower temperature driftsWide common mode: –4 V to 80 VHigh-side drive: high-side solenoid monitor with enhanced PWM rejection
Applications
- Full authority digital engine control (FADEC)
- Automatic transmission
- Shifter system
- Powertrain current sensor
- Electric drive
- Drive line components
- Fuel cell control unit (FCCU)
Product Categories
- Amplifiers