UCC28251PW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

UCC28251PW属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由德州仪器制造生产的UCC28251PWDC-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。

1 Features

1• Prebiased Startup

• Synchronous Rectifier Control Outputs with

Programmable Delays (Including Zero Delay

Support)

• Voltage Mode Control with Input Voltage Feed-

Forward or Current Mode Control

• Primary or Secondary-Side Control

• 3.3-V, 1.5% Accurate Reference Output

• Lower Minimum Operating Frequency

• 1% Accurate Cycle-by-Cycle Over Current

Protection with Matched Duty Cycle Outputs

• Programmable Soft-Start and Hiccup Restart

Timer

• Thermally Enhanced 4-mm x 4-mm VQFN-20

Package and 20-pin TSSOP Package

2 Applications

• Half-Bridge, Full-Bridge, Interleaved Forward, and

Push-Pull Isolated Converters

• Telecom and Data-com Power

• Wireless Base Station Power

• Server Power

• Industrial Power Systems

3 Description

The UCC28251 PWM controller is designed for high

power density applications that may have stringent

prebiased startup requirements. The UCC28251’s

integrated synchronous rectifier control outputs target

high efficiency and high performance topologies such

as half-bridge, full-bridge, interleaved forward, and

push-pull. The UCC27210 half bridge drivers and

UCC2752x MOSFET drivers used in conjunction with

the UCC28251 provide a complete power converter

solution.

The UCC28251 is a functional variant of the

UCC28250 PWM Controller. While the same basic

functionality of the UCC28250 is largely maintained,

the UCC28251 is designed to enhance performance

in both offline, 400-V input DC-to-DC applications and

48-V input full-bridge or half-bridge applications.