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VND5E050ACKTR-E Datasheet(PDF) 27 Page - STMicroelectronics |
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VND5E050ACKTR-E Datasheet(HTML) 27 Page - STMicroelectronics |
27 / 43 page VND5E050ACJ-E, VND5E050ACK-E Application information Doc ID 022515 Rev 2 27/43 It is preferable that VPU is switched off during the module standby mode to avoid an increase in overall standby current consumption in normal conditions, that is, when the load is connected. An external pull-down resistor (RPD) connected between output and GND is mandatory to avoid misdetection in case of floating outputs in off-state (see Figure 33: Current sense and diagnostic). RPD must be selected in order to ensure VOUT < VOLmin unless pulled up by the external circuitry: RPD ≤ 22 KΩ is recommended. For proper open load detection in off-state, the external pull-up resistor must be selected according to the following formula: For the values of VOLmin,VOLmax, IL(off2)r and IL(off2)f see Table 10: Open load detection (8V<VCC<18V). V V I R V OL f off L PD OFF up Pull OUT 2 min ) 2 ( _ = < ⋅ = − V V R R I R R V R V OL PD PU r off L PD PU PU PD ON up Pull OUT 4 max ) 2 ( _ = > + ⋅ ⋅ − ⋅ = − |
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