Constant Current Control 28-Pin DSO

The TLE7242-2G IC is a four channel low-side constant current control pre-driver IC. Each channel can be configured to function either in on/off mode or in constant current mode by setting the appropriate MODE bit in SPI message #7.

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