TLE6270R Datasheet, PDF (14/35 Pages) Infineon Technologies AG – Quad Low Side Injector Driver

TLE6270R
Quad Low Side Injector Driver
Functional Description
5.4
Diagnostic
The TLE6270R detects too high output current and too short or too long time to reach the peak current in ON state,
too high output voltage in OFF state. It is also informed of too high current in the high side transistors via the
HS_Diag pin.
According to these comparator outputs and the NON signals, a logic circuit defines the failures (failure detection).
When the failure is dangerous for the ECU, the engine management system, the vehicle or the car driver, all
transistors T1, T2, T3, T4 are immediately switched off for protection (failure protection).
Then, for limp home and for repairing, the failures are read by the microcontroller via SPI (failure information).
SDI
CLK
SDO
GROUP_A
FAILURES
PROTECTION
GROUP_A
FAILURES
DETECTION
SPI
INTERFACE
for
FAILURES
INFORMAT°
GROUP_B
FAILURES
DETECTION
overcurrent 1A & 4A
overtemperature 1A & 4A
HS_DiagA pin
peak current overtime 1A & 4A
VOL 1A & 4A
overcurrent 1B & 4B
overtemperature 1B & 4B
HS_DiagB pin
peak current overtime 1B & 4B
VOL 1B & 4B
NCS
GROUP_B
FAILURES
PROTECTION
Figure 10 Diagnostic Schematic
DIAGNOSTIC CONTROL
RST
IN1 (NON1 inverted)
IN4 (NON4 inverted)
Data Sheet
14
V1.3, 2008-12-23