Constant current control IC for transmission
Constant current regulation with high-accuracy for inductors for automotive applications
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 transmissions, active suspension, and electronic stability controls.
- 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
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 TLE 82452 -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.
