Data Sheet S19689EJ2V0DS

11

μPD166010

Case 2: Short circuit during on-condition

The device shuts down automatically when either or both of following conditions (a) is detected.

The sense current is fixed at IIS,fault. Shutdown is latched until the next reset via input.

(a) Von > Von(OvL) after td(oc)

Case2-(a) Von > Von(OvL) after td(OC)

(Evaluation circuit)

RL

VCC

IN

OUT

IS

RIS IL

IIS

IIN

VOUT

VIS

Von

VBAT

VIN

: Cable impedance

td(oc): Turn-on check delay after input current positive slope

tsdelay(fault): Fault sense signal delay after short circuit detection

IL(SC): Short circuit detection current

Depending on the external impedance

Short circuit detection

IIN

VOUT/VCC

IL

VBAT

0

0

0

t

IIS

IIS,fault

0

IL(SC)

tsdelay(fault)

VOUT

VCC

Von(OvL) (1 V typ.)

td(oc)