TLE92464EDHP TLE92464EDHP is a high accuracy flexible, monolithic 4 channel solenoid driver IC designed for control of 4 linear solenoids in automatic transmission

Overview

Compared to the existing TLE92464ED, the TLE92464EDHP offers higher accuracy performances, in particular:

  • <±3 mA up to 1200 mA initially
  • <±0.8% up to 1200 mA including aging

Target currents can be programmed from 0 to 1500mA with a resolution of 15 bits. The TLE92464EDHP supports dither currents up to 1800mA. The dither generator superimposes a triangular or trapezoidal waveform with programmable amplitude and frequency on the programmed current setpoint. The device includes the drive transistors and the current sensing resistors to minimize the number of external components. TLE92464EDHP is ISO 26262 compliant and achieves safety level ASIL 

Summary of Features

  • High current control accuracy
    • <±3 mA up to 1200 mA initially (TJ = -40 - 150°C, VBAT = 9 - 16 V)
    • <±0.8% up to 1200 mA including aging (TJ = -40 - 150°C, VBAT = 9 - 16 V)
    • <±1% up to 1500 mA including aging (TJ = -40 - 150°C, VBAT = 6 - 18 V)
  • Four independent low side channels with integrated MOSFETs (RDSon = 115 mΩ)
  • Programmable setpoint from 0mA to 1.5A
  • Load current including dither 1.8A
  • Current in parallel channel mode 2.7A
  • Integrated dither generator with programmable amplitude, frequency, and waveform
  • 15-bit current setpoint resolution
  • Integrated sense resistor RSHUNT = 140 mΩ
  • Excellent immunity to large load supply voltage changes
  • Operation down to 3.5 V at VDD pin
  • 32-bit SPI with 8 bit CRC and SPI watchdog
  • Sophisticated protection and diagnostic functions for each channel in on and off state:
    • Independent thermal shutdown for each channel
    • Diagnostic Function (Open Load, Short Circuit Ground, Over Current)
    • Voltage monitoring
    • Overtemperature protection
  • Two independent current feedback paths
  • Integrated system clock with clock watchdog
  • Temperature range -40°C to 175 °C
  • Small power package PG-DSO-36-72
  • Green product (RoHS-compliant)
  • Pb-free (RoHS-compliant) package
  • AEC-Q100 Grade 0 qualified
  • ISO 26262 Safety Element out of Context for safety requirements up to ASIL C

Benefits

  • Reduction of TCU calibration efforts saving cost and time
  • Enables ASIL D on system level
  • Full temp range up to 175°C
  • +/- 1% Current Accuracy over lifetime (-40°C to 150°C)
  • Excellent regulation performance for step responses
  • Excellent Battery Ripple Rejection
  • Ease of use due to the family concept with 6CH TLE92466ED device
  • Same software and package as TLE92464ED and TLE92466ED enables maximal reuse
  • Scalable solution
  • Integrated Power Devices
  • Minimizes number of components placement, simplifies PCB layout
  • Enables current limitation, slew rate control, and thermal protection
  • Improved Short-to-Battery performance

Potential Applications

  • Variable force solenoids (e.g. automatic transmission and e-Axle)
  • Other constant current solenoids
  • Idle air control
  • Exhaust gas recirculation
  • Vapor management valve
  • Suspension control
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