3512

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 9

www.unisonic.com.tw

QW-R502-073,A

PIN CONFIGURATION

1

2

3

4

5

6

78

9

10

11

12

13

14

PGO

PGI

GND

FPO

PSON

RI

PIN DESCRIPTION

PIN NO

PIN NAME

TYPE

DESCRIPTION

1

PGI

input

Power good input.

3

FPO

output

Fault protection output, open drain output stage.

4

PSON

input

Power on/off control signal sends from CPU or main-board. The power

supply will be turned on/off after 38mS/115mS respectively.

8

input

5V over current protection.

9

input

3.3V over current protection.

5

input

12V over current protection. Regarding typical application, this pin is

connected to the positive end of a current shunt through one resistor.

When the voltage on IS12 is higher than that of VS12 by 5mV, OCP

voltage drop between the positive end of the current shunt and VS12.

Adjusting the value of the external resistor can adjust the threshold for

OCP accordingly. The operation for IS5 or IS33 is the same.

6

RI

input

Current sense setting. An external resistor Ri is connected between RI

function.

12

input

5V over/under-voltage protection.

7

input

Second 12V over/under-voltage protection.

10

input

12V over/under-voltage protection.

11

input

3.3V over/under-voltage protection.

13

power

Supply voltage. 4V ~ 15V.

14

PGO

output

Power good logic output, open drain output stage. The power good

delay is 300mS from PGI to PGO.

2

GND

power

Ground.