AT1743

2-Channel PWM Controller for LCD Display

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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Features
• High-accuracy reference voltage circuit (±1%).
• Built-in short-circuit protection circuit.
• Built-in Undervoltage Lockout protection.
• Internal 2.5V Reference supply.
• Variable Dead time provides control over total
Range.
Applications
• LCD Display
• Portable equipment

General Description
The AT1743 is 2-channel PWM switching
regulator controllers that contains an on-chip 2.5V
reference, two error amplifier, an adjustable
oscillator, two dead-time comparators, under-
voltage lockout circuitry and 2 common-emitter
output. It is idea for step-up, step-down, and
inverting converter.
Block Diagram