CM6565数据手册Champion中文资料规格书

描述 Description

The CM6565 is the industry first 16 pin self-start interleaved PFC with 180 degree phase shift CRM PFC controller for total power supply system efficiency greater 90% or 85%. The CM6565 is like a combination of  two 180 degree phase shift CM6561s plus a lot of light load efficiency boost functions. CM6565 gives the best noise free performance of the offline power supply.  The desired frequency range for each PFC controller should be above 35KHz.

 Mismatches between two boost converters for the interleaved PFC can be less than +/-5%.

 Basically, it is like two 6561s work together with 180 degree phase shift plus light load improvements.1. IAC (pin 1), Multiplier input pin: Current input instead of Voltage input; it will enhance input current THD and the system will be less sensitive to the noise. The system can reduce one resistor between ground and IAC, multiplier input pin.

2. IAC (pin 1), Multiplier input pin: During the start up condition (the VCC is less than UVLO, 13V), IAC is connected to VCC, and the RAC resistor (between VIN pin and IAC pin) serves as a bleed resistor. Once the VCC is greater than UVLO, then, RAC resistor provides the sine wave current from VIN pin to IAC pin. After VCC is greater than UVLO,  the voltage of the IAC pin is around 1.4V.

Therefore, the RAC resistor can be served as a bleed resistor.  Usually, the value of the RAC is from 4Mega to 10Meg ohm.

3. IAC (pin 1), Multiplier input pin: During the start up, if the system turn-on time needs to be fast, an external high voltage bipolar and a diode can be added for VCC during the start-up, once VCC is greater than UVLO, 15V, IAC pin will go low and turn off the high voltage bipolar.   

4. For the fast load transient and line transient, a transconductance error amplifier has been implemented between the output pin VEAO and the input pin VFB to replace the conventional OP.  Since transconductance amplifier does not need the local feed back (OP needs the local feedback); therefore, its VFB can fast and accurately sense OVP condition not like traditional OP, operational amplifier can not sense VFB for OVP.

5. Open Control Loop protection/Tri-Fault Detect Comparator on VFB pin for easy passing the single fault protection test of the UL1950 regulation.

 The CM6565¡¦s interleaved PFC has two PFC controllers, Master PFC and Slave PFC. The Slave PFC is lagged ~ 180 degree phase shift from the Master PFC. Both PFC controllers consisted of ZCS plus about ZVS functions. It provides the high efficient of power supply at both full load and at light load. To input EMI filter, the currents are overlapping and it looks like a CCM boost system with double frequency. The ZCS plus about ZVS on feature reduce the EMI noise further.

 It has a superior performance multiplier making the device capable of working in universal input voltage range applications with an excellent THD.

The totem pole output stage is capable of driving a power MOS or IGBT with +500mA source and -1A sink currents. The device is operating in transition mode and it is optimized for Electronic Lamp Ballast application, AC-DC adaptors and SMPS.

特性 Features

·Industry first interleaved PFC with 180 phase shift\r
·CCM for EMI filter but CRM for PFC boost diodes\r
·Due to ZCS and about ZVS, it is about noise free\r
·Design for LCD TV or 90+ power supply\r
·Critical Conduction Mode (CRM) = ZCS with about ZVS\r
·Current input multiplier, IAC (Patented)\r
·For 90+ system, an LLC or SRC should be the PWM\r
·For 85+ system, an Dual Forward or a half bridge should be the PWM\r
·At light load, PFC bulk will drop ~ 40V at low line and Slave PFC will be disabled (Patented)\r
·PGB pin also can be used to turn on the CM6900/CM6901 which is LLC/SRC controller for 90+ applications\r
·VRMS does not need high voltage resistor; IAC determines VRMS1 and VRMS2\r
·AC Brown out by comparing VRMS2 with 1.25V on and 1.0V off ·No bleed resistor during the start up (Patented)\r
·Can ON-OFF high voltage bipolar during the system start up (Patented)\r
·500mV Current Limit and about 130uS Current Loop Open time out protection\r
·Precision output over voltage protection comparator with 2.75V threshold which is 10% increased from 2.5V.\r
·GM for Fast line and load transient response (Patented)\r
·Soft Start pin at pin 6\r
·Open control loop protection/Tri-Fault Detect Comparator for UL1950 (Patented)\r
·16.5V 50mA Shunt Regulator at VCC\r
·Micro power start-up current (60uA Typ.)\r
·Very low operating supply current (1.5mA Typ.)\r
·Internal start up timer\r
·1% precision 3mA Buffered 7.5V reference\r
·Totem pole driver output current: 30ohm (VCC=15V) sourcing current and 15 ohm (VCC=15V) sink current\r
·16-Pin DIP/SOIC packages\r

应用 Application

·LCD TV\r
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·Desktop PC Power Supply\r
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·AC Adaptor\r
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·Internet Server Power Supply\r
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·IPC Power Supply\r
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·UPS\r
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·Battery Charger\r
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·DC Motor Power Supply\r
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·Monitor Power Supply\r
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·Telecom System Power Supply\r
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·Distributed Power