Device

Operating

Temperature Range

Package

TL494

SEMICONDUCTOR

TECHNICAL DATA

SWITCHMODE

PULSE WIDTH MODULATION

CONTROL CIRCUIT

ORDERING INFORMATION

TL494CN

TL494IN

TA = 0° to +70°C

TA = – 25° to +85°C

Plastic

Plastic

PIN CONNECTIONS

Order this document by TL494/D

N SUFFIX

PLASTIC PACKAGE

CASE 648

CT

RT

Ground

C1

1

Inv

Input

C2

Q2

E2

E1

1

≈ 0.1 V

Oscillator

VCC

5.0 V

REF

(Top View)

Noninv

Input

Inv

Input

Vref

Output

Control

VCC

Noninv

Input

Compen/PWN

Comp Input

Deadtime

Control

Error

Amp

+

–

2

3

4

5

6

7

89

10

11

12

13

14

15

16

2

Error

Amp

+

–

Q1

D SUFFIX

PLASTIC PACKAGE

CASE 751B

(SO–16)

TL494CD

SO–16

1

MOTOROLA ANALOG IC DEVICE DATA

SWITCHMODE™ Pulse Width

Modulation Control Circuit

The TL494 is a fixed frequency, pulse width modulation control circuit

designed primarily for SWITCHMODE power supply control.

unless otherwise noted.)

Rating

Symbol

TL494C

TL494I

Unit

Power Supply Voltage

VCC

42

V

Collector Output Voltage

VC1,

VC2

42

V

Collector Output Current

(Each transistor) (Note 1)

IC1, IC2

500

mA

Amplifier Input Voltage Range

VIR

–0.3 to +42

V

Power Dissipation @ TA ≤ 45°C

PD

1000

mW

Thermal Resistance,

Junction–to–Ambient

R

θJA

80

°C/W

Operating Junction Temperature

TJ

125

°C

Storage Temperature Range

Tstg

–55 to +125

°C

Operating Ambient Temperature Range

TL494C

TL494I

TA

0 to +70

– 25 to +85

°C

Derating Ambient Temperature

TA

45

°C

NOTE:

1. Maximum thermal limits must be observed.

© Motorola, Inc. 1996

Rev 1