TLE7242-2G Datasheet, PDF (3/50 Pages) Infineon Technologies AG – 4 Channel Fixed Frequency Constant Current Control IC

4 Channel Fixed Frequency Constant Current Control
IC
TLE7242-2G
1
Overview
1.1
Features
• 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 0.2 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
50 Hz to 4 KHz (typ)
PG-DSO-28-26
• Programmable KP and KI coefficients for the PI controller for each
channel
• Programmable Transient Mode of operation to reduce settling time when large changes in the current set point
are commanded.
• 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 enabled and 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 function as a simple on/off predriver or a constant current predriver 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.
• Diagnostics
– Over current
Type
TLE7242-2G
Data Sheet
Package
PG-DSO-28-26
3
Marking
TLE7242-2G
Rev. 1.0, 2008-07-09