Datasheet > CM6903A

CM6903A

更新时间： 2024-11-29 03:25:55

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
14页	302K
描述
Low Pin Count PFC/PWM CONTROLLER COMBO

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CM6903A 数据手册

CM6903A

Low Pin Count PFC/PWM CONTROLLER COMBO

GENERAL DESCRIPTION

FEATURES

The CM6903A is a space-saving PFC-PWM controller for ꢀ

Patent Number #5,565,761, #5,747,977, #5,742,151,

#5,804,950, #5,798,635

power factor corrected, switched mode power supplies that

offers very low start-up and operating currents. For the

ꢀ

Pin to pin compatible with FAN6903/4

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

power supply less than 500Watt, its input current shaping ꢀ

PFC performance could be very close to CM6800 or

ML4800 architecture.

ꢀ

Power Factor Correction (PFC) 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

CCM boost or DCM boost with leading edge modulation

PFC using Input Current Shaping Technique

Feedforward IAC pin to do the automatic slope

compensation

fully compliant to IEC1000-3-2 specifications. The

CM6903A includes circuits for the implementation of a

ꢀ

leading edge, input current shaping technique “boost” type ꢀ

PFCOVP, PFC VCCOVP, Precision -1V PFC ILIMIT,

Tri-Fault Detect comparator to meet UL1950

No bleed resistor required

PFC and a trailing edge, PWM.

ꢀ

The CM6903A’s PFC and PWM operate at the same

ꢀ

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

current: 2mA typical.

frequency, 67kHz. This higher frequency allows the user to

design with smaller PWM components while maintaining ꢀ

the optimum operating frequency for the PFC. An PFC OVP

comparator shuts down the PFC section in the event of a

sudden decrease in load. The PFC section also includes

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

peak current limiting for enhanced system reliability.

ꢀ

VINOK Comparator to guarantee to enable PWM when

PFC reach steady state

ꢀ

High efficiency trailing-edge current mode PWM

UVLO, REFOK, and brownout protection

Digital PWM softstart: CM6903A (10ms)

Precision PWM 1.5V current limit for current mode

operation

24 Hours Technical Support---WebSIM

Champion provides customers an online circuit simulation tool

called WebSIM. You could simply logon our website at

www.champion-micro.com for details.

APPLICATIONS

PIN CONFIGURATION

SIP-09 (Z09)

Front View

ꢀ

Desktop PC Power Supply

AC Adaptor

Internet Server Power Supply

IPC Power Supply

UPS

Battery Charger

DC Motor Power Supply

Monitor Power Supply

Telecom System Power Supply

Distributed Power

2005/01/20

Champion Microelectronic Corporation

Page 1

12 3 4 5 6 7...14

中文翻译

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与CM6903A相关器件

型号	品牌	获取价格	描述	数据表
CM6903A_08	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903AGIZ	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903AIZ	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903AXIZ	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903B	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903BGIZ	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903BIZ	CHAMP	获取价格	Low Pin Count PFC/PWM CONTROLLER COMBO
CM6903IS	CHAMP	获取价格	Low Pin Count PFC/PWM Controller Combo
CM6903IZ	CHAMP	获取价格	Low Pin Count PFC/PWM Controller Combo
CM6904	CHAMP	获取价格	Low Pin Count PFC/PWM Controller Combo

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