Automotive proportional solenoid drive with highly accurate current sensor reference design
TIDA-020023
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- Automotive Proportional Solenoid Drive W/ Highly-Accurate Current Sensor Ref. De (Rev. A)
(PDF 4521 KB)
15 May 2019
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 kHz
- Integrated shunt facilitates more accuracy over a larger dynamic range
- Lower temperature drifts
- Wide common mode: –4 V to 80 V
- High-side drive, high-side solenoid monitor with enhanced PWM rejection
See the Important Notice and Disclaimer covering reference designs and other TI resources.
