Electric power steering (EPS)

Products and reference designs

Electric power steering (EPS)

Block diagram

Overview

Our integrated circuits and reference designs will help you build a reliable, high-performance, safe electric power steering (EPS) system based on advanced power management, sensors, control and gate drivers.

Design requirements

  • Following state-of-the-art architecture regarding system redundancy in order to allow implementation of the system on the highest safety level.
  • Providing a steering wheel position sensing in ignition-off state with minimal quiescent current.
  • Optimizing size while maintaining the required safety and performance.

Block diagram

Find products and reference designs for your system.

Electric power steering (EPS)

M M Stator-Channel A Stator-Channel A Stator-Channel B Stator-Channel B Safety switch Safety switch Switch driver Switch driver Wired interface Wired interface CAN CAN PMIC PMIC WDT WDT DC/DC DC/DC Super-visor Super-visor LDOs LDOs Sensor DC/DC SensorDC/DC SPI SPI Digital processing Digital processing PWM PWM ADC ADC GPIOs GPIOs CAN CAN SPI SPI MCU core MCU core To power stages To power stages Self-diagnostics/monitoring Self-diagnostics/monitoring Temperature sensor Temperature sensor Reverse battery protection Reverse battery protection Ideal diode controller Ideal diode controller Alternatively to MCU Alternatively to MCU I/V Sense I/V Sense Analog front end Analog front end Analog front end Analog front end Current and voltage sense Current and voltage sense AMP AMP VREF VREF ADC ADC Safety logic Safety logic Comparator Comparator Phase separation relay Phase separation relay Driver Driver Power stage Power stage 3-phase bridge driver 3-phase bridge driver 3-phase bridge 3-phase bridge Sensing Sensing Rotor position sensor Rotor position sensor Steering wheel angle sensor Steering wheel angle sensor Torque sensor Torque sensor

PMIC

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A system basis chip (SBC), also known as a power management IC (PMIC), is a highly integrated multi-rail power supply for the digital processing. It typically integrates a digital interface, watchdog, monitoring and diagnostic features.

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Power management (26)
Multi-channel ICs (PMICs)
  • TPS653860-Q1Automotive 2.3-V to 36-V, 2.8-A power management IC (PMIC) for safety-relevant applications
    Data sheet: PDF | HTML
  • TPS653854A-Q1ISO26262 ASIL-D multi-rail power supply for MCUs with 500-mA I/O rail and rotation counter
    Data sheet: PDF | HTML
  • TPS653852A-Q1SafeTI-ISO26262 ASIL-D multi-rail power supply for MCUs with 500mA I/O rail
    Data sheet: PDF | HTML
  • TPS65321A-Q1Automotive 3.6V to 36V, 3.2A Buck Converter with Wide Vin 280mA LDO Regulator
    Data sheet: PDF | HTML
  • TPS65381A-Q1Multi-rail power supply (PMIC) for microcontrollers in safety applications
    Data sheet: PDF | HTML
  • TPS51200A-Q1Sink and Source DDR Termination Regulator
    Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)
  • LM5164-Q16-V to 100-V input, 1-A synchronous DC-DC buck converter with ultra-low IQ
    Data sheet: PDF | HTML
  • TPS62916-Q1Automotive, 3V to 17V input, 6A low-noise buck converter with integrated ferrite bead filter
    Data sheet: PDF | HTML
  • LMR38010-Q1Automotive SIMPLE SWITCHER® 4.2-V to 80-V, 1-A synchronous buck converter
    Data sheet: PDF | HTML
  • LMR38020-Q1Automotive SIMPLE SWITCHER® power converter 4.2-V to 80-V, 2-A, synchronous buck converter
    Data sheet: PDF | HTML
  • TPS628502-Q12.7-V to 6-V, 2-A automotive step-down converter in SOT583 package
    Data sheet: PDF | HTML
  • LMR36015-Q14.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter
    Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators
  • TPS7B4256-Q1Automotive, 70-mA 40-V voltage-tracking low-dropout regulator with FB and 6-mV tracking tolerance
    Data sheet: PDF | HTML
  • TPS7B4255-Q1Automotive, 70-mA 40-V voltage-tracking low-dropout (LDO) regulator with 5-mV tracking tolerance
    Data sheet: PDF | HTML
  • TPS7B86-Q1Automotive 500-mA, 40-V, ultra-low-IQ, low-dropout (LDO) linear regulator with power good
    Data sheet: PDF | HTML
  • TPS745-Q1Automotive 500-mA, low-IQ, high-PSRR, low-dropout (LDO) voltage regulator with power good

    Data sheet: PDF | HTML
  • TPS784-Q1Automotive, 300-mA, low-IQ, high-PSRR, LDO voltage regulator with high accuracy and enable
    Data sheet: PDF | HTML
  • TPS7B69-Q1Automotive 150-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator
    Data sheet: PDF | HTML
Supervisor & reset ICs
  • TPS3850-Q1Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay
    Data sheet: PDF | HTML
  • TLV803ELow-power voltage supervisor (reset IC) with active-low open-drain output
    Data sheet: PDF | HTML
Shunt voltage references
  • TL431LI-Q1Automotive, adjustable, precision shunt regulator with optimized reference current
    Data sheet: PDF | HTML
  • TLV431B-Q1Automotive, low-voltage adjustable precision shunt regulator
    Data sheet: PDF | HTML
  • TL431-Q1Automotive adjustable precision shunt regulator (pin layout: KRA)
    Data sheet: PDF | HTML
  • TLVH431A-Q1Automotive, low-voltage adjustable precision shunt regulator
    Data sheet: PDF | HTML
  • LM4050-N50-ppm/°C precision micropower shunt voltage reference
    Data sheet: PDF | HTML
AC/DC & DC/DC controllers (external FET)
  • TPS40210-Q14.5-V to 52-V wide input range current mode boost controller with 700-mV reference voltage
    Data sheet: PDF | HTML
  • PMP107083.5 to 36 Vin 6.5 Vout @ 1.2-A Synchronous 4-Switch Buck-Boost Converter Reference Design
    Test report: PDF Schematic: PDF

Technical documentation

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Type Title Date
White paper Bridging 12 V and 48 V in dual-battery automotive systems 21 Nov 2018
* Data sheet TPS65381-Q1 Multirail Power Supply for Microcontrollers in Safety-Relevant Applications datasheet (Rev. G) PDF | HTML 07 Dec 2023
White paper Driving the green revolution in transportation 03 Oct 2016

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