TL1454ACNSR集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

TL1454ACNSR属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由美国德州仪器公司制造生产的TL1454ACNSRDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

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%

1.26-V Reference

description

The TL1454A 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.

Channel 1 is configured to drive n-channel MOSFETs in step-up or flyback converters, and channel 2 is

configured to drive p-channel MOSFETs in step-down or inverting converters. The operating frequency is set

with an external resistor and an external capacitor, and dead time is continuously adjustable from 0 to 100%

duty cycle with a resistive divider network. Soft start can be implemented by adding a capacitor to the dead-time

control (DTC) network. The error-amplifier common-mode input range includes ground, which allows the

TL1454A to be used in ground-sensing battery chargers as well as voltage converters.