Constant current control IC for transmission

Constant current regulation with high-accuracy for inductors for automotive applications

anchor

Overview

Infineon provides a range of constant current control ICs for inductive loads for various automotive applications, including but not limited to: solenoid valve driver ICs in automatic transmission, active suspension, and electronic stability controls.

Key Features

  • Low/high side configurable channels
  • High current accuracy
  • SPI for control/diagnosis/config
  • Enables ASIL D on system level
  • Thermal shutdown per channel
  • Voltage monitoring
  • Overtemperature protection
  • Green Product (RoHS-compliant)
  • AEC Qualified

Products

About

High-accuracy constant current regulator ICs for automotive inductors

The high-accuracy regulators are capable of driving constant currents up to eight inductors. Moreover, each channel current can be programmed individually via the SPI interface. On top of constant-voltage and constant-current controllers, there are sophisticated monitoring and diagnosis functions to support functional safety concepts. Pre-drivers with external MOSFETs allow constant-current regulation for inductor currents higher than 1.5 A.

Infineon´s solution for variable-force or constant-current controller solenoids is typically used in automatic transmissions, idle speed-/valve-/suspension control, or exhaust gas recirculation applications.

Monitor voltages and ensure they stay in optimal operating range

Infineon’s constant-current control ICs offer integrated low-side switches, control logic, and outputs for external high-side switches and open-load detection in an ON/OFF state. Additionally, our range of constant-current regulator ICs includes a protection circuit that monitors voltages and ensures they remain within the correct operational range. 

Minimize the number of components needed and simplify PCB layout

 With shorted-load detection and short-to-ground detection, Infineon’s constant-current control ICs minimize the number of components placement and simplify PCB layout and reduce power dissipation.

The TLE92466ED and TLE92464ED are monolithic six- and four-channel (respectively) solenoid valve driver ICs that enable ASIL D on the system level. These scalable solutions control the linear solenoids in automatic transmission, electronic stability control, and active suspension applications. The TLE92464EDHP is a high-accuracy four-channel solenoid driver IC that enables the reduction of TCU calibration efforts saving cost and time.

Regulate current flows with wide range of solenoid driver ICs

For either low-side or high-side drivers, our two-channel TLE82452 -3SA and three-channel TLE82453-3SA constant current control ICs regulate average current flows up in a load up to 1500 mA, while the two-channel TLE9241QU is designed for only high-side switches and typically used to provide power to the transmission solenoids.

For 24 V applications, such as for commercial vehicles, low-side constant current control pre-driver ICs, TLE7242-2G and TLE8242-2L require minimal protection circuitry in order to be implemented and the sense resistors can be scaled to expand solenoid current range above 1.2 A.

What is the challenge to drive a current into inductive loads?

An inductor stores magnetic energy, which generates high negative transients when switched off.

The challenge is to discharge the energy in a way that the switch or driver is not destroyed by the negative voltage spikes.

Infineon’s constant-current drivers for inductors include a protection circuit that keeps the voltages within the operational range.

Infineon Smart Power longevity program

Find information relating to the planned long-term availability of semiconductor products “Longevity” for Automotive Smart Power products.

High-accuracy constant current regulator ICs for automotive inductors

The high-accuracy regulators are capable of driving constant currents up to eight inductors. Moreover, each channel current can be programmed individually via the SPI interface. On top of constant-voltage and constant-current controllers, there are sophisticated monitoring and diagnosis functions to support functional safety concepts. Pre-drivers with external MOSFETs allow constant-current regulation for inductor currents higher than 1.5 A.

Infineon´s solution for variable-force or constant-current controller solenoids is typically used in automatic transmissions, idle speed-/valve-/suspension control, or exhaust gas recirculation applications.

Monitor voltages and ensure they stay in optimal operating range

Infineon’s constant-current control ICs offer integrated low-side switches, control logic, and outputs for external high-side switches and open-load detection in an ON/OFF state. Additionally, our range of constant-current regulator ICs includes a protection circuit that monitors voltages and ensures they remain within the correct operational range. 

Minimize the number of components needed and simplify PCB layout

 With shorted-load detection and short-to-ground detection, Infineon’s constant-current control ICs minimize the number of components placement and simplify PCB layout and reduce power dissipation.

The TLE92466ED and TLE92464ED are monolithic six- and four-channel (respectively) solenoid valve driver ICs that enable ASIL D on the system level. These scalable solutions control the linear solenoids in automatic transmission, electronic stability control, and active suspension applications. The TLE92464EDHP is a high-accuracy four-channel solenoid driver IC that enables the reduction of TCU calibration efforts saving cost and time.

Regulate current flows with wide range of solenoid driver ICs

For either low-side or high-side drivers, our two-channel TLE82452 -3SA and three-channel TLE82453-3SA constant current control ICs regulate average current flows up in a load up to 1500 mA, while the two-channel TLE9241QU is designed for only high-side switches and typically used to provide power to the transmission solenoids.

For 24 V applications, such as for commercial vehicles, low-side constant current control pre-driver ICs, TLE7242-2G and TLE8242-2L require minimal protection circuitry in order to be implemented and the sense resistors can be scaled to expand solenoid current range above 1.2 A.

What is the challenge to drive a current into inductive loads?

An inductor stores magnetic energy, which generates high negative transients when switched off.

The challenge is to discharge the energy in a way that the switch or driver is not destroyed by the negative voltage spikes.

Infineon’s constant-current drivers for inductors include a protection circuit that keeps the voltages within the operational range.

Infineon Smart Power longevity program

Find information relating to the planned long-term availability of semiconductor products “Longevity” for Automotive Smart Power products.

Documents

Documents

Design resources

Developer community

{ "ctalist":[ { "link" : "https://community.infineon.com/t5/forums/postpage/choose-node/true", "label" : "Ask the community ", "labelEn" : "Ask the community " }, { "link" : "https://community.infineon.com/t5/Forums/ct-p/products", "label" : "View all discussions ", "labelEn" : "View all discussions " } ] }