Datasheet > SG6901A

SG6901A

更新时间： 2024-10-29 03:32:27

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		功率因数校正控制器
页数	文件大小	规格书
18页	705K
描述
PFC / Flyback PWM Controller

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SG6901A 数据手册

Product Specification

PFC / Flyback PWM Controller

SG6901A

very few external components to achieve versatile

protections. It is available in a 20-pin SOP package.

FEATURES OVERVIEW

Interleaved PFC/PWM switching

Low start-up and operating current

Innovative switching charge multiplier-divider

Multi-vector control for improved PFC output

transient response

The patented interleave-switching feature synchronizes

the PFC and PWM stages and reduces switching noise.

For PFC stage, the proprietary multi-vector control

Average-current-mode control for PFC

Programmable two-level PFC output voltage

PFC over-voltage and under-voltage protections

PFC and PWM feedback open-loop protection

Cycle-by-cycle current limiting for PFC/PWM

Slope compensation for PWM

scheme provides a fast transient response in a

low-bandwidth PFC loop, in which the overshoot and

undershoot of the PFC voltage are clamped. If the

feedback loop is broken, the SG6901A shuts off PFC to

prevent extra-high voltage on output. Programmable

two-level output voltage control reduces the PFC output

voltage at low line input to increase the efficiency of the

power supply.

Constant power limit for PWM

Brownout protection

Over-temperature protection (OTP)

For the flyback PWM, the synchronized slope

compensation ensures the stability of the current loop

under continuous-conduction-mode operation. Built-in

APPLICATIONS

Switching Power Supplies with Active PFC and

Standby Power

line-voltage

compensation

maintains

constant

High-Power Adaptors

output-power limit. Hiccup operation during output

overloading is also guaranteed.

DESCRIPTION

The highly integrated SG6901A is designed for power

supplies with boost PFC and flyback PWM. It requires

In addition, SG6901A provides protection functions, such

as brownout and RI pin open/short protection.

Typical Application

Version 1.0.1 (IAO33.0062.B0)

- 1 -

www.sg.com.tw • www.fairchildsemi.com

September 26, 2007

12 3 4 5 6 7...18

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