双通道脉冲宽度调制（ PWM ）控制电路 DUAL-CHANNEL PULSE-WIDTH-MODULATION PWM CONTROL CIRCUIT
description
The TL1454 is a dual-channel pulse-width-modulation PWM control circuit, primarily intended for low-power, dc/dc converters. Applications include LCD displays, backlight inverters, notebook computers, and other products requiring small, high-frequency, dc/dc converters. Each PWM channel has its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver. The voltage reference,
oscillator, undervoltage lockout, and short-circuit protection are common to both channels.
Two Complete PWM Control Circuits
Outputs Drive MOSFETs Directly
Oscillator Frequency...50 kHz to 2 MHz
3.6-V to 20-V Supply-Voltage Range
Low Supply Current...3.5 mA Typ
Adjustable Dead-Time Control, 0% to 100%
1.25-V Reference