CP494

SWITCHMODE Pulse Width Modulation Control Circuit

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU ,

TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525

Http: www.ceramate.com.tw

Fax:886-3-3521052

Page 1 of 11

Rev 1.0 Apr.19,2004

The CP494 is a fixed frequency, pulse width modulation control

circuit designed primarily for SWITCHMODE power supply control.

unless otherwise noted.)

Rating

Symbol

Value

Unit

Power Supply Voltage

42

V

Collector Output Voltage

42

V

Collector Output Current

(Each transistor) (Note 1)

500

mA

Amplifier Input Voltage Range

–0.3 to +42

V

1000

mW

Thermal Resistance,

Junction–to–Ambient

80

°C/W

Operating Junction Temperature

125

°C

Storage Temperature Range

–55 to +125

°C

Operating Ambient Temperature Range

0 to +70

°C

Derating Ambient Temperature

45

°C

1. Maximum thermal limits must be observed.

Ground

C1

1

Inv

Input

C2

Q2

E2

E1

1

≈ 0.1 V

Oscillator

5.0 V

REF

(Top View)

Noninv

Input

Inv

Input

Output

Contro

l

Noninv

Input

Compen/PWN

Comp Input

Deadtime

Control

Error

Amp

+

-

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

2 Error

Amp

+

-

Q1

PIN CONNECTIONS