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AT1729

Preliminary

3-Channel PWM Controller for LCD Bias

General Description

The AT1729 is a PWM DC/DC converter control

IC with 3 channel outputs that can directly drive

power MOSFET. This IC ia suitable for very small

DC/DC converters because of their small and thin

package(1.1 mm max.), and high operation

frequency (up to 1.0 MHz).

Features

鈥?Low input voltage: 2.5V to 7V

鈥?3-Channels PWM Control:

2 Boost Controller(CH1,CH2)

1 Inverting Controller (CH3)

鈥?Adjustable Soft start time and maximum duty

cycle

鈥?Built-in timer latch for short circuit protection:

Delay time=216/(Switching frequency)

鈥?Built-in under-voltage lockout, thermal

shutdown.

鈥?High operating frequency: 100kHz to 1MHz

Applications

鈥?LCD Displays Bias

鈥?Power Supply for general equipment

Block Diagram

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

WWW:

http://www.aimtron.com.tw

Fax: 886-3-563-0879

Email:

service@aimtron.com.tw

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