TL1454CN

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