UCC3580DTR-1屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由美國德州儀器公司制造生產(chǎn)的UCC3580DTR-1DC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓?fù)浣Y(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。

FEATURES

Provides Auxiliary Switch Activation

Complementary to Main Power

Switch Drive

Programmable deadtime (Turn-on

Delay) Between Activation of Each

Switch

Voltage Mode Control with

Feedforward Operation

Programmable Limits for Both

Transformer Volt- Second Product

and PWM Duty Cycle

High Current Gate Driver for Both

Main and Auxiliary Outputs

Multiple Protection Features with

Latched Shutdown and Soft Restart

Low Supply Current (100
A Startup,

1.5 mA Operation)

DESCRIPTION

The UCC3580 family of PWM controllers is designed to implement a variety

of active clamp/reset and synchronous rectifier switching converter topologies.

While containing all the necessary functions for fixed frequency, high

performance pulse width modulation, the additional feature of this design is

the inclusion of an auxiliary switch driver which complements the main

power switch, and with a programmable deadtime or delay between each

transition. The active clamp/reset technique allows operation of single

ended converters beyond 50% duty cycle while reducing voltage stresses

on the switches, and allows a greater flux swing for the power transformer.

This approach also allows a reduction in switching losses by recovering energy

stored in parasitic elements such as leakage inductance and switch

capacitance.

The oscillator is programmed with two resistors and a capacitor to set

switching frequency and maximum duty cycle. A separate synchronized

ramp provides a voltage feedforward pulse width modulation and a programmed

maximum volt-second limit. The generated clock from the oscillator

contains both frequency and maximum duty cycle information.