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BTS7020-2EPA Scheda tecnica(PDF) 32 Page - Infineon Technologies AG |
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BTS7020-2EPA Scheda tecnica(HTML) 32 Page - Infineon Technologies AG |
32 / 58 page Data Sheet 32 Rev. 1.00 2017-08-24 BTS7020-2EPA PROFETTM+2 Protection Power supply voltage VS can increase above 18 V for short time, for instance in Load Dump or in Jump Start condition. Whenever VS ≥ VS(JS), the overload detection current is set to IL(OVL_JS) as shown in Figure 26. Figure 26 Overload Detection Current variation with VS voltage When IL ≥ IL(OVL) (either IL(OVL0) or IL(OVL1)), the channel is switched OFF. The channel is allowed to restart according to the retry strategy described in Chapter 8.3. 8.3 Protection and Diagnosis in case of Fault Any event that triggers a protection mechanism (either Overtemperature or Overload) has 2 consequences: • the affected channel switches OFF and the internal counter is incremented • if the diagnosis is active for the affected channel, a current IIS(FAULT) is provided by IS pin (see Chapter 9.2.2 for further details) The channel can be switched ON again if all the protection mechanisms fulfill the “restart” conditions described in Table 14. Furthermore, the device has an internal retry counter (one for each channel) to maximize the robustness in case of fault. 8.3.1 Retry Strategy When IN is set to “high”, the channel is switched ON. In case of fault condition the output stage is switched OFF. The channel can be allowed to restart only if the “restart” conditions for the protection mechanisms are fulfilled (see Table 14). Table 14 Protection “Restart” Condition Fault condition Switch OFF event “Restart” Condition Overtemperature TJ ≥ TJ(ABS) or (TJ - TJ(REF)) ≥ TJ(DYN) TJ < TJ(ABS) and (TJ - TJ(REF)) < TJ(DYN) (including hysteresis) Overload IL ≥ IL(OVL) IL < 50 mA TJ within TJ(ABS) and TJ(DYN) ranges (including hysteresis) Protection_JS.emf IL(OVL) VS VS(JS) IL(OVL_JS) |
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