AMS494CN データシートの表示（PDF） - Advanced Monolithic Systems Inc

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AMS494CN

Internal regulator provides a stable 5V reference supply

Advanced Monolithic Systems Inc 

Features

• Internal regulator provides a stable 5V reference supply

trimmed to 5%

• Uncommitted output TR for 200mA sink or source

current

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

• Variable duty cycle by dead time control (pin 4) Complete

PWM control circuit

• On-chip oscillator with master or slave operation

• Internal circuit prohibits double pulse at either output

Description

The AMS494 is used for the control circuit of the PWM

switching regulator. The AMS494 consists of 5V reference

voltage circuit, two error amplifiers, flip flop, an output con-

trol circuit, a PWM comparator, a dead time comparator and

an oscillator. This device can be operated in the switching

frequency of 1 KHz to 300 KHz.

Internal Block Diagram

AMS494

PIN CONFIGURATION

1B 1

2B 2

3B 3

4B 4

5B 5

6B 6

7B 7

E8

1 6 1C

1 5 2C

1 4 3C

1 3 4C

1 2 5C

1 1 6C

1 0 7C

9 COM

(Top View)

1

Advanced Monolithic Systems http://www.ams-semitech.com

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