µPD16875
On Detection of Overcurrent
5V
IN (Input)
Flg
(Output)
CTL
(Input)
OUT
(Output)
5V
GND
5V
GND
5V
GND
Overcurrent
IOUT
detection threshold
Inrush current
Slow Normal Output is short-circuited.
start operation
period 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.
10
Data Sheet S13895EJ1V0DS