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CM6903B PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 CM6903B
部品説明 Low Pin Count PFC/PWM CONTROLLER COMBO
メーカ Champion Microelectronic
ロゴ Champion Microelectronic ロゴ 

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CM6903B Datasheet, CM6903B PDF,ピン配置, 機能
GENERAL DESCRIPTION
CM6903B
Low Pin Count PFC/PWM CONTROLLER COMBO
FEATURES
The CM6903B is a space-saving PFC-PWM controller for ‹ Patent Number #5,565,761, #5,747,977, #5,742,151,
power factor corrected, switched mode power supplies that
#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
PFC performance could be very close to CM6800 or ‹ Internally synchronized PFC and PWM in one IC
ML4800 architecture.
‹ Patented slew rate enhanced voltage error amplifier with
advanced input current shaping technique
Power Factor Correction (PFC) offers the use of smaller, ‹ Universal Line Input Voltage
lower cost bulk capacitors, reduces power line loading and ‹ CCM boost or DCM boost with leading edge modulation
stress on the switching FETs, and results in a power supply
PFC using Input Current Shaping Technique
fully compliant to IEC1000-3-2 specifications. The ‹ Feedforward IAC pin to do the automatic slope
CM6903B includes circuits for the implementation of a
compensation
leading edge, input current shaping technique “boost” type ‹ PFCOVP, PFC VCCOVP, Precision -1V PFC ILIMIT,
PFC and a trailing edge, PWM.
Tri-Fault Detect comparator to meet UL1950
‹ No bleed resistor required
The CM6903B’s PFC and PWM operate at the same ‹ Low supply currents; start-up: 100uA typical, operating
frequency, 67.5kHz. This higher frequency allows the user
current: 2mA typical.
to design with smaller PWM components while maintaining ‹ Synchronized leading PFC and trailing edge modulation
the optimum operating frequency for the PFC. An PFC OVP
PWM to reduce ripple current in the storage capacitor
comparator shuts down the PFC section in the event of a
between the PFC and PWM sections and to reduce
sudden decrease in load. The PFC section also includes
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: CM6903B (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
‹ 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
PIN CONFIGURATION
SIP-09 (Z09)
Front View
2007/04/13 Rev1.0
Champion Microelectronic Corporation
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