Automotive proportional solenoid drive with highly accurate current sensor reference design
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Key Document


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.

  • 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

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA253  80V, bi-directional, precision current sense amp w/pwm rejection & int. shunt resistor  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TLV1805-Q1  Automotive high volt comparator with push-pull output and shutdown  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS709-Q1  Automotive 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA253 Download -
TLV1805-Q1 Download Download
TPS709-Q1 Download Download
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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 4521 15 May 2019
Design files (6)
Title Type Size (KB) Date
ZIP 198 15 Apr 2019
ZIP 2464 15 Apr 2019
PDF 345 15 Apr 2019
PDF 83 15 Apr 2019
PDF 93 15 Apr 2019
PDF 211 15 Apr 2019

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