NCP112

http://onsemi.com

6

Figure 2. Timing Diagram

3.3 V, 5 V, 12 V

PGO

PGI

FAULT

REMOTE

Tremote (ON)

Tpg

Tremote (OFF)

OVP

Tfault (OV)

UVP

Table 1. FUNCTION TABLE

PGI

REMOTE

ADJ

Undervoltage

Overvoltage

FAULT

PGO

<1.28 V (L)

L

<1.28 V (L)

No

No

H

L

<1.28 V (L)

L

<1.28 V (L)

No

Yes

H

L

<1.28 V (L)

L

<1.28 V (L)

Yes

No

H

L

<1.28 V (L)

L

>1.28 V (H)

No

No

L

L

<1.28 V (L)

L

>1.28 V (H)

No

Yes

H

L

<1.28 V (L)

L

>1.28 V (H)

Yes

No

H

L

>1.28 V (H)

L

<1.28 V (L)

No

No

H

L

>1.28 V (H)

L

<1.28 V (L)

No

Yes

H

L

>1.28 V (H)

L

<1.28 V (L)

Yes

No

H

L

>1.28 V (H)

L

>1.28 V (H)

No

No

L

H

>1.28 V (H)

L

>1.28 V (H)

No

Yes

H

L

>1.28 V (H)

L

>1.28 V (H)

Yes

No

H

L

X

H

X

X

X

H

L

2. X = > Don’t care.

3. FAULT = L means main PWM is Enable.

4. PGO = H means power supply is working within ATX specifications.