TLE8242-2 Datasheet, PDF (4/78 Pages) Infineon Technologies AG – 8 Channel Fixed Frequency Constant Current Control With Current Profile Detection

8 Channel Fixed Frequency Constant Current Control
With Current Profile Detection
TLE8242-2
1
Overview
1.1
Features
• Low side constant current control pre-driver integrated circuit
• Eight independent channels
• Output current programmable with 11 bit resolution
– Current range = 0 to 1.2A (typ) with a 0.2 Ω sense resistor
– Resolution = 0.78125 mA/bit (typ) with a 0.2 Ω sense resistor
– +/- 2% full scale error over temperature when autozero is used
• Programmable PWM frequency via SPI from approximately
10 Hz to 4 kHz (typ)
PG-LQFP-64
• Programmable KP and KI coefficients for the PI controller for each
channel
• Programmable superimposed dither
– Dither programmed by setting a dither step size and the number of PWM periods in each dither period
– Programmed via the SPI interface
– The dither for each channel can be programmed independently
• Programmable synchronization of the PWM control signals
– Phase delay time set via the SPI interface
– Synchronization initiated via signal at the PHASE_SYNC input pin
– Channels within one device and between multiple devices can be synchronized
• Each channel can be configured to for constant current control or for direct PWM control via SPI
• In Direct PWM mode, a current profile detection function is engaged
– Verifies solenoid armature movement
– Profile characteristics programmed via SPI
– Pass / Fail Status can be read via SPI
• 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
Type
TLE8242-2
Data Sheet
Package
PG-LQFP-64
4
Marking
TLE8242-2L
Rev. 1.0, 2010-02-09