SG6105ATP 查看數據表（PDF） - Fairchild Semiconductor

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SG6105ATP

Power Supply Supervisor + Regulator + PWM

Fairchild Semiconductor 

Power Supply Supervisor + Regulator + PWM

Product Specification

SG6105A

PIN DESCRIPTIONS

Name Pin Type

PSON

1

Logic Input

V33

2

Analog Input

V5

3

Analog Input

OPP

4

Analog Input

UVAC

5

Analog Input

NVP

6

Analog Input

V12

7

Analog Input

OP1/OP2 9/8 Analog Output

PG

FB2

VREF2

VREF1

FB1

GND

COMP

IN

10 Logic Output

11 Analog Output

12 Analog Input

13 Analog Input

14 Analog Output

15 Supply

16 Analog Output

17 Analog Input

SS

RI

VCC

18 Analog Input

Program Analog

19

Input

20 Supply

Function

Remote on/off logic input for CPU or controller. Turn on/off the PWM output after the 7.5ms

/ 26ms delay.

PSON = 0, the main SMPS is operational.

PSON =1, the main SMPS is off and the latch is reset.

3.3V over-voltage/under-voltage control sense input.

5V over-voltage/under-voltage control sense input.

Over-power sense input. This pin is connected to driver transformer or the Output of current

transformer. When not in use, this pin should be grounded.

AC fail detection, detect main AC voltage under-voltage and/or failure.

The protection input for negative Output, such as –12V and/or –5V. Trip voltage = 2.1V.

12V over-voltage/under-voltage control sense input.

The totem-pole Output drivers of push-pull PWM. The Output are enabled (low) only when

the NAND gate inputs are high. The maximum duty cycle on an Output (OP1 or OP2) is

46%.

Power-good logic output, 0 or 1 (open-collector). PG = 1, the power is good for operation.

The PG delay is 300ms.

Output for second converter regulation loop.

Reference comparison input for second converter regulation loop, 2.5V.

Reference comparison input for first converter regulation loop, 2.5V.

Output for first converter regulation loop.

Ground.

Error amplifier Output and the input of the PWM comparator.

The negative input of error amplifier. The positive input of error amplifier is a 2.5V reference

voltage.

The soft-start, settable through an external capacitor. The current source output at this pin

is 8µA and the voltage is clamped at 2.5V.

Connected to external resistor for the reference setting. RI = 75kΩ.

Supply voltage. 4.5V ~ 5.5V connected to 5V-standby.

© System General Corp.

Version 1.0.1 (IAO33.0072.B0)

-5-

www.sg.com.tw • www.fairchildsemi.com

September 25, 2007

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