UPSR100

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 6

www.unisonic.com.tw

QW-R502-946.c

PIN CONFIGURATION

PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

1

CS

Current sense input.

2

Power supply.

3

OUT

Base drive for power BJT.

4

GND

Ground.

5

FB

The voltage feedback from the auxiliary winding

6

The 5V output of the internal voltage regulator

7

BIAS

This pin sets the bias current inside UTC UPSR100 with an external resistor to GND

8

COMP

This pin connects a bypass capacitor

BLOCK DIAGRAM

6

5V

Regulator

Por

2

Logic core

OVP

8V

+

-

5

FB

+

-

4V

CV

controller

Ibias

Base

drive

7

BIAS

+

-

0.43V

3 OUT

1

+

-

0.5V

LEB

CC

controller

8

COMP

4

GND

Tdemag

detector

CS