Data Sheet S14288EJ1V0DS

11

µµµµPD16876

On Detection of Overcurrent

5 V

5 V

GND

5 V

GND

GND

5 V

GND

Overcurrent detection

threshold

IN (input)

LATCH = "L"

LATCH = "H"

FLG

(output)

Iout

CTL

(input)

OUT

(output)

Slow

start

period

Inrush current

Output is

short-circuited

Inrush current

Output is

short-circuited

5 V

GND

Overcurrent detection

threshold

Iout

OUT

(output)

Slow

start

period

If an overcurrent is detected after the overcurrent detection delay time of 20

µs, the IC executes a slow-start

operation (output rise time: 5 ms TYP.) again.

If an overcurrent is detected while the IC is executing the slow-start operation again, it is assumed that the output

is short-circuited and the FLG pin goes low. When the CTL signal is deasserted inactive, OUT is turned OFF and

FLG goes high. If the CTL signal is asserted active, OUT is turned back ON unless the undervoltage lockout circuit

or thermal shutdown circuit is activated.

When LATCH = “H”, output is turned off at the timing of FLG = “L”.