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CM6904

更新时间： 2024-02-24 10:14:50
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 258K
描述
Low Pin Count PFC/PWM Controller Combo

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中文翻译

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CM6904 数据手册

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CM6903/4  
Low Pin Count PFC/PWM CONTROLLER COMBO  
GENERAL DESCRIPTION  
FEATURES  
The CM6903/4 is a space-saving PFC-PWM controller for ꢀ  
power factor corrected, switched mode power supplies that  
Patent Number #5,565,761, #5,747,977, #5,742,151,  
#5,804,950, #5,798,635  
offers very low start-up and operating currents. For the  
ꢀ
Pin to pin compatible with FAN6903/4  
power supply less than 500Watt, its input current shaping ꢀ  
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  
CCM boost or DCM boost with leading edge modulation  
PFC using Input Current Shaping Technique  
Feedforward IAC pin to do the automatic slope  
compensation  
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  
fully compliant to IEC1000-3-2 specifications. The  
CM6903/4 includes circuits for the implementation of a  
ꢀ
leading edge, input current shaping technique “boost” type ꢀ  
PFC and a trailing edge, PWM.  
PFCOVP, PFC VCCOVP, Precision -1V PFC ILIMIT,  
Tri-Fault Detect comparator to meet UL1950  
No bleed resistor required  
ꢀ
The CM6903’s PFC and PWM operate at the same  
frequency, 67kHz. The PFC frequency of the CM6904 is  
automatically set at half that of the 134kHz PWM. 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  
ꢀ
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  
ꢀ
down the PFC section in the event of a sudden decrease in ꢀ  
load. The PFC section also includes peak current limiting  
VINOK Comparator to guarantee to enable PWM when  
PFC reach steady state  
for enhanced system reliability.  
ꢀ
ꢀ
ꢀ
ꢀ
High efficiency trailing-edge current mode PWM  
UVLO, REFOK, and brownout protection  
Digital PWM softstart: CM6903 (10ms), CM6904 (5ms)  
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)  
SOP-16 (S16)  
Top View  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Desktop PC Power Supply  
AC Adaptor  
Front View  
1
2
3
4
5
6
7
8
NC  
16  
15  
14  
13  
12  
11  
10  
9
Internet Server Power Supply  
IPC Power Supply  
PFCOUT  
NC  
GND  
GND  
PWMOUT  
UPS  
Battery Charger  
DC Motor Power Supply  
Monitor Power Supply  
Telecom System Power Supply  
Distributed Power  
NC  
VCC  
NC  
ISENSE  
VEAO  
1
2
3
4
5
6
7
8
9
VFB  
IAC  
DC ILIMIT  
NC  
NC  
2002/12/16 Preliminary Rev. 0.4  
Champion Microelectronic Corporation  
Page 1  
1234567...14

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