UCC2810DW集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

UCC2810DW属于集成电路（IC）的ACDC转换器离线开关。由德州仪器制造生产的UCC2810DWAC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。

FEATURES

· Single Oscillator Synchronizes Two PWMs

· 150-μA Startup Supply Current

· 2-mA Operating Supply Current

· Operation to 1 MHz

· Internal Soft-Start

· Full-Cycle Fault Restart

· Internal Leading-Edge Blanking of the Current

Sense Signal

· 1-A Totem Pole Outputs

· 75-ns Typical Response from Current Sense

to Output

· 1.5% Tolerance Voltage Reference

DESCRIPTION

The UCC3810 is a high-speed BiCMOS controller

integrating two synchronized pulse width modulators

for use in off-line and dc-to-dc power supplies. The

UCC3810 family provides perfect synchronization

between two PWMs by usin g the same oscillator.

The oscillator’s sawtooth waveform can be used for

slope compensation if required.

Using a toggle flip-flop to alternate between

modulators, the UCC3810 ensures that one PWM

does not slave, interfere, or otherwise affect the other PWM. This toggle flip- flop also ensures that

each PWM is limited to 50% maximum duty cycle,

insuring adequate off-time to reset magnetic

elements. This device contains many of the same

elements of the UC3842 current mode controller

family, combined with the enhancements of the

UCC3802. This minimizes power supply parts count.

Enhancements include leading edge blanking of the

current sense signals, full cycle fault restart, CMOS

output drivers, and outputs which remain low even

when the supply voltage is removed.