3515A

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 9

www.unisonic.com.tw

QW-R502-105,A

PIN ASSIGNMENT

1

2

3

4

5

6

78

9

10

11

12

13

14

PGI

GND

FPOB

PSONB

RI

PGO

FUNCTION DESCRIPTION

PGI

PSONB

UV&OC Protection

OV Protection

FPOB

PGO

PGI<1.2V

L

No

No

L

L

PGI<1.2V

L

No

Yes

H

L

PGI<1.2V

L

Yes

No

L

L

PGI<1.2V

L

Yes

Yes

H

L

PGI>1.2V

L

No

No

L

H

PGI>1.2V

L

No

Yes

H

L

PGI>1.2V

L

Yes

No

H

L

PGI>1.2V

L

Yes

Yes

H

L

X

H

X

X

H

L

Note: FPOB=L means: fault is not latched. FPOB=H means: fault is latched

PGO=L means: fault. PGO=H means: No fault

X=do not care

PIN DESCRIPTIONS

PIN NO.

PIN NAME

TYPE

DESCRIPTION

1

PGI

Input

Power Good Input. For ATX SMPS, it detects AC line voltage through the

main transformer.

2

GND

Supply

Ground

3

FPOB

Output

Fault Protection Output. Output signal to control the primary PWM IC through

an opto-coupler. When FPOB is low, the PWM IC is enabled.

4

PSONB

Input

Remote On/Off logic input from CPU or main-board. The power supply will

be turned on/off after 38mS delay.

5

Input

6

RI

Input

Reference setting. One external resistor Ri connected between RI and GND

7

Input

12V over/under voltage protection.

8

Input

5V over current protection.

9

Input

3.3V over current protection

10

Input

12V over/under voltage protection.

11

Input

3.3V over/under voltage protection

12

Input

5V over/under voltage protection.

13

Supply

Power supply.

14

PGO

Output

Power good logic output, 0 or 1(open-drain). Power good=1 means that the

power supply is good for operation. The power good delay is 300mS.