UCC2808D-2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

UCC2808D-2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UCC2808D-2DC-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• Dual Output Drive Stages in Push-Pull

Configuration

• 130-μA Typical Starting Current

• 1-mA Typical Run Current

• Operation to 1-MHz

• Internal Soft-Start

• On-Chip Error Amplifier With 2-MHz Gain

Bandwidth Product

• On-Chip VDD Clamping

• Output Drive Stages Capable Of 500-mA Peak

Source Current, 1-A Peak Sink Current

2 Applications

• Server and Desktop Power Supplies

• Telecom Power Supplies

• DC-DC Converters

• Switched-Mode Power Supplies

3 Description

The UCCx808-x is a family of BiCMOS push-pull,

high-speed, low-power, pulse-width modulators. The

UCCx808 contains all of the control and drive circuitry

required for offline or DC-to-DC fixed frequency

current-mode switching power supplies with minimal

external parts count.

The UCCx808-x dual output drive stages are

arranged in a push-pull configuration. Both outputs

switch at half the oscillator frequency using a toggle

flip-flop. The dead time between the two outputs is

typically 60 ns to 200 ns depending on the values of

the timing capacitor and resistors, thus limiting each

output stage duty cycle to less than 50%.