KSI-K003-000

1

S494

Pulse Width Modulation

Description

The S494 is a monolithic integrated circuit which includes all the necessary building blocks

for the design of pulse width modulate(PWM) switching power supplies, including push-pull,

bridge and series configuration. The device can operate at switching frequencies between

1KHz and 300KHz and output voltage up to 40V. The S494 is specified over an operating

temperature range of -40℃to85℃.

Features

• Uncommitted output transistors capable of 200mA source or sink

• Internal protection from double pulsing of out-puts with narrow pulse widths or with

supply voltages bellows specified limits

• Easily synchronized to other circuits

• Dead time control comparator

• Output control selects single-ended or push-pull operation

Ordering Information

Type NO.

Marking

Package Code

S494

S494

SOP-16

Outline Dimensions

S

PIN Connections

1. Non-INV Input

2. INV Input

3. Feed-Back

4. Dead-Time Control

7. GND

8. C1

9. E1

10. E2

11. C2

12. Vcc

13 Output Control

14. Ref Out

15. INV-Input

16. Non-INV Input