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BTT6200-1ENA Scheda tecnica(PDF) 28 Page - Infineon Technologies AG |
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BTT6200-1ENA Scheda tecnica(HTML) 28 Page - Infineon Technologies AG |
28 / 46 page Data Sheet 28 Rev. 1.0 2018-05-14 PROFET™+ 24 V BTT6200-1ENA Diagnostic Functions 7.3.4 SENSE Signal in Short Circuit to VS In case of a short circuit between the OUTput-pin and the VS pin, all or portion (depending on the short circuit impedance) of the load current will flow through the short circuit. As a result, a lower current compared to the normal operation will flow through the DMOS of the BTT6200-1ENA, which can be recognized at the current sense signal. The open load at OFF detection circuitry can also be used to distinguish a short circuit to VS. In that case, an external resistor to ground RSC_VS is required. Figure 26 gives a sketch of the situation. Figure 26 Short Circuit to Battery Detection in OFF Electrical Equivalent Circuit 7.3.5 SENSE Signal in Case of Overload An overload condition is defined by a current flowing out of the DMOS reaching the current limitation and / or the absolute dynamic temperature swing TJ(SW) is reached, and / or the junction temperature reaches the thermal shutdown temperature TJ(SC). Please refer to Chapter 6.5 for details. In that case, the SENSE signal given is by IIS(FAULT) when the diagnostic is selected. The device has a thermal latch behavior, such that when the overtemperature or the exceed dynamic temperature condition has disappeared, the DMOS is reactivated only when the IN is toggled LOW to HIGH. If the DEN pin is activated the SENSE follows the output stage. If no reset of the latch occurs, the device remains in the latching phase and IIS(FAULT) at the IS pin, even though the DMOS is OFF. 7.3.6 SENSE Signal in Case of Inverse Current In the case of inverse current, the sense signal will indicate open load in OFF state and indicate open load in ON state. VS Vbat VOL(OFF) IIS(FAULT) IS Short circuit to Vs.vsd VBAT OUT GND RSC_VS RIS ZGND OL comp. |
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