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| BTS54220-LBA Datasheet, PDF (38/71 Pages) Infineon Technologies AG – CMOS compatible parallel input pins for four channels | |||
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BTS54220-LBA
Protection Functions
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.
It is not possible to reset the counters using HWCR.CTC bit as long as the SPI is in Limp Home Mode, even if the
VDD is provided.
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
38
Rev. 2.0, 2014-05-26
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