VN7007ALH datasheet(25/37 Pages) STMICROELECTRONICS

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VN7007ALH

Application information

Figure 31: Open-load / short to VCC condition

Table 14: CurrentSense pin levels in off-state

Condition

Output

CurrentSense

FR_DIAG

Open-load

VOUT > VOL

Hi-Z

VSENSEH

VOUT < VOL

Hi-Z

Short to VCC

VOUT > VOL

Hi-Z

VSENSEH

Nominal

VOUT < VOL

Hi-Z

4.4.2

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. Small 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.

It is preferable VPU to be switched off during the module standby mode in order to avoid the

overall standby current consumption to increase in normal conditions, i.e. when load is

connected.

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VN7007ALH Datasheet(PDF) 25 Page - STMicroelectronics