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VND5E050ACKTR-E Datasheet(PDF) 26 Page - STMicroelectronics |
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VND5E050ACKTR-E Datasheet(HTML) 26 Page - STMicroelectronics |
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26 / 43 page  Application information VND5E050ACJ-E, VND5E050ACK-E 26/43 Doc ID 022515 Rev 2 characteristics Table 9: Current sense (8 V < VCC <18V)). ● Diagnostic flag in fault conditions, delivering a fixed voltage VSENSEH up to a maximum current ISENSEH in case of the following fault conditions (refer to Table 11: Truth table): – Power limitation activation – Overtemperature – Short to VCC in off-state – Open-load in off-state with additional external components. A logic level high on the CS_DIS pin simultaneously sets all the current sense pins of the device in a high impedance state, thus disabling the current monitoring and diagnostic detection. This feature allows multiplexing of the microcontroller analog inputs by sharing the sense resistance and ADC line among different devices. Figure 33. Current sense and diagnostic 3.4.1 Short to VCC and off-state open-load detection Short to VCC A short circuit between VCC and output is indicated by the relevant current sense pin set to VSENSEH during the device off-state. Little or no current is delivered by the current sense during the on-state depending on the nature of the short circuit. Off-state open-load with external circuitry Detection of an open-load in off mode requires an external pull-up resistor (RPU) connecting the output to a positive supply voltage (VPU). Main MOSn 41V OUTn ILoff2r RSENSE RPROT To uC ADC RPD RPU VPU Pwr_Lim VSENSE PU_CMD Overtemperature OL OFF + - VOL CURRENT SENSEn IOUT/KX ISENSEH VBAT ILoff2f VSENSEH Load INPUTn VCC GND CS_DIS |
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