UC3842B/3843B

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 11

www.unisonic.com.tw

QW-R103-012.F



MARKING

Package

UC3842B

UC3843B

DIP-8

UTC

UC3843B

2

3

4

1

5

6

7

8

Date Code

L: Lead Free

P: Halogen Free

Lot Code

SOP-8



PIN CONFIGURATION

1

2

3

4

8

7

6

5

OUTPUT

CS

COMP

GND



PIN DESCRIPTIONS

PIN NO.

PIN NAME

I/O

DESCRIPTION

1

COMP

O

2

I

Error amp inverting input, The non-inverting input of error amp is 2.5V band

gap reference

3

CS

I

Current sense input to PWM control gate drive of output

4

I

To set oscillator frequency and maximum output duty cycle

5

GND

Power ground

6

OUTPUT

O

To direct drive power MOSFET

7

Power supply

8

O