Datasheet > CM6805BOXIRTR

CM6805BOXIRTR

更新时间： 2022-10-22 07:37:51

品牌	Logo	应用领域
虹冠电子 - CHAMP		功率因数校正控制器
页数	文件大小	规格书
15页	198K
描述
10-PIN Green-Mode PFC/PWM Combo CONTROLLER

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CM6805BOXIRTR 数据手册

CM6805BO

10-PIN Green-Mode PFC/PWM Combo CONTROLLER

GENERAL DESCRIPTION

FEATURES

The CM6805BO is the Green-Mode PFC/PWM Combo

controller for Desktop PC and High Density AC Adapter.

For the power supply, it’s input current shaping PFC

performance could be very close to the performance of the

CM6800 or ML4800 leading edge modulation average

current topology.

10-Pin SOIC package.

Use RAC around 4~8 Mega Ohm at IAC pin.

Easy to configure into Boost Follower.

Enable lowest BOM for power supply with PFC.

Internally synchronized PFC and PWM in one IC.

Patented slew rate enhanced voltage error amplifier

with advanced input current shaping technique.

Universal Line Input Voltage

CM6805BO offers the use of smaller, lower cost bulk

capacitors, reduces power line loading and stress on the

switching FETs, and results in a power supply fully

compliant to IEC1000-3-2 specifications. The CM6805BO

includes circuits for the implementation of a leading edge

modulation, input current shaping technique “boost” type

PFC and a trailing edge modulation current, PWM.

CCM boost or DCM boost with leading edge

modulation PFC using Input Current Shaping

Technique.

Feed forward IAC pin to do the automatic slope

compensation.

PFCOVP, Precision -1V PFC ILIMIT, PFC Tri-Fault

Detect comparator to meet UL1950

The CM6805BO’s PFC and PWM operate at the same

frequency, 100kHz. A PFC OVP comparator shuts down

the PFC section in the event of a sudden decrease in load.

The PFC section also includes peak current limiting for

enhanced system reliability.

Low supply currents; start-up: 100uA typical,

operating current: 2mA typical.

Synchronized leading PFC and trailing edge

modulation PWM to reduce ripple current in the

storage capacitor between the PFC and PWM

sections and to reduce switching noise in the system

VIN-OK Comparator to guarantee to enable PWM

when PFC reach steady state

PFC has a PFCOFFB pin which can use for AC brown out

application and determine the GMth to turn off PFC.

High efficiency trailing-edge current mode PWM

Exact 50% PWM maximum duty cycle

UVLO, REFOK, and brownout protection

Digital PFC and PWM soft start, ~10mS

Precision PWM 1.5V current limit for current mode

operation

PFCOFFB pin to sense light load to turn off PFC or

PFCOFFB pin to sense Input voltage as AC Brown

Out

2010/04/20 Rev 1.3

Champion Microelectronic Corporation

Page 1

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