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| BTS54040-LBF_15 Datasheet, PDF (35/67 Pages) Infineon Technologies AG – SPI Power Controller | |||
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BTS54040-LBF
Protection Functions
For the condition n < nretry the counter of automatic reactivations is reset by every channel activation if HWCR.RCR
bit is set to 1. In Figure 20 the different behavior of retry counters according to HWCR.RCR bit value can be seen.
In Limp Home Mode, the thermal counters of the protection functions are only operative if VDD is provided in the
specified range. Otherwise the counters are not active and all channels are in âunlimited restartâ mode.
In case of the short circuit to ground, current sense ratio (kILIS) is deactivated as soon as VDS > VDS(SB) (Switch
bypass monitor threshold). Usually a short circuit to ground condition tends to set VDS = VS therefore in most of
the cases no current sensing diagnostic is possible in short circuit.
The error information related to the given channel are available also on Warnings Diagnosis (ERRn bits).
Refer to Figure 18 and Figure 19 for details.
Data Sheet
35
Rev. 2.1, 2014-12-05
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