UC3854

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 6

www.unisonic.com.tw

QW-R103-082.a



PIN CONFIGURATION



PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

1

GND

Ground. All voltage are measured with respect to GND .

2

PKLMT

Peak Limit. The threshold for PKLMT is 0V.

3

CA OUT

Current Error Amplifier Output.

4

Current Sense Minus. The negative input to the current amplifier.

5

Mult OUT

Multiplier/Divider Output. Multiplier output and non-inverting input connected together

6

Analog Input AC Current.

7

VA OUT

Voltage Error Amplifier Output.

8

RMS Line Voltage.

9

Voltage Reference Output.

10

ENA

Enable. A logic input, set “H” active.

11

VSNESE

Voltage Error Amplifier Inverting Input.

12

Oscillator Charging Current.

13

SS

Soft Start.

14

Oscillator Timing Capacitor.

15

Positive supply voltage.

16

GT Drv

Gate Driver.



BLOCK DIAGRAM

7

VA

OUT

5

Mult

OUT

CA

OUT

PK

LMT

3

2

RFE

10

ENA

6

8

13

SS

4

14

12

15

16

1

GT Drv

GND

(A) 16V/10V

(B) 10.5V/10V

2.65V/2.15V

3V

A

B

C

A

C

R

R

S

Q

OSCILLATOR

7.5V

REF

7.2V

20V

14µA

9