TLE8242-2L - Infineon Technologies

Überblick

The TLE8242-2L IC is an eight channel low-side constant current control pre-driver IC

Each channel can be configured to function either in direct PWM mode or in constant current mode by setting the appropriate CM bit in SPI message #1.

Zusammenfassung der Merkmale

Low side constant current control pre-driver integrated circuit
Four independent channels
Output current programmable with 11 bit resolution
Current range = 0 to 1.2A (typ.) with a 0.2Ohm sense resistor
Resolution = 0.78125 mA/bit (typ.) with a 0.2Ohm
sense resistor
+/- 2% full scale error over temperature when autozero is used
Programmable PWM frequency via SPI from approximately 50 Hz to 4 KHz (typ.)
Interface and Control
32 Bit SPI (Serial Peripheral Interface) - Slave only
ENABLE pin to disable all channels or freeze all channels
Active low RESET_B pin resets internal registers to their default state and disables all channels.
Open drain FAULT pin can be programmed to transition low when various faults are detected.
5.0V and 3.3V logic compatible I/O
Protection
Over current shutdown - monitored at POSx pin.
Programmable over current threshold
Programmable over current delay time
Programmable over current retry time
Battery pin (BAT) overvoltage shutdown

Vorteile

Sense resistor can be scaled to expand solenoid current range above 1.2A
Minimal protection circuitry can be added in order to use the TLE8242-2L in 24V applications (commercial vehicles)
Current profile detection feature can be use to determine movement of the solenoid armature

Potentielle Zielanwendungen