TLE7242-2G Datasheet, PDF (18/50 Pages) Infineon Technologies AG – 4 Channel Fixed Frequency Constant Current Control IC

TLE7242-2G
Functional Description and Electrical Characteristics
Two fault tested bits are defined:
The tested bit is set to 1 when the fault test has completed successfully.
Table 3 Diagnostics Tested Bits / Flags
Tested Type
OUTx High
Short to Ground and Open load OFF
tested
Short to Battery tested
Bit SB-T
Each fault type can be described by the two bits: FAULT and TESTED.
OUTx Low
Bit OFF-T
Table 4
FAULT
0
0
1
1
FAULT vs. TESTED Bits Matrix and Interpretation
TESTED Interpretation by microcontroller
0
This fault type has not been tested
1
No Fault - The fault type has been tested and no fault is present
0
This combination cannot occur
1
Fault - This particular fault type has occurred
Divider Select
(SPI register)
read SPI fault
register
Masterclock
V_POS
V_OL
OL-FA
V_POS
V_SG
SG-FA
V_POS
V_SB
SB-FA
PWM mode enabled
PWM Start
Gate is ON
Predivider
1:128
1:192
1:256
fault filter timer
(1..10) (shared)
clear clear clear
digital filter
open load OFF
(only while OFF)
digital filter
short to ground
(only while OFF)
digital filter
short to battery
(only while ON)
Tested timer
1..10
(shared)
clear
LOGIC
OL-OFF-FD
SG-FD
SB-FD
OL-ON-F
SG-F (Short to Ground Fault)
OFF-T (Short to Ground and Open
Load Off Tested)
SB-F (Short to Battery Fault)
SB-T (Short to Battery Tested)
OL-OFF-F (Open Load Off Fault)
OL-ON-F (Open Load On Fault)
Gate On Counter
1..64
Figure 11 Diagnostic Block Diagram
Data Sheet
18
Rev. 1.0, 2008-07-09