General Description

The CM6500/1 is a single Power Factor Controller for offline switched mode power suppliers. The power supply of CM6500/01 allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully compiles with IEC-1000-2-3 specifications. CM6500/1 includes circuits for the implementation of leading edge, average current, "boost" type power factor correction and a synchronized 47% PWM clock. The CM6500/1 has additional features besides all the features of CM6800. Additional features are Inrush Current Control, Separated PFC OVP pin, Separated Power VCC pin and Analog VCC pin, and Separated Power Ground pin and Analog Ground pin. Gate-driver with 1A capabilities minimizes the need for external driver circuits. Low power requirements improve efficiency and reduce component costs.

An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting and input voltage brownout protection. The synchronized 47% PWM clock can on/off down stream DC to DC PWM stages, and PFC section can have the best timing switching with the down stream DC to DC PWM stages.

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Features

• Inrush Current Control
• Separated PFC OVP pin
• Separated Power Ground and Analog Ground
• PWMSDB to turn off PWMCLK without disturbing PFC section
• 23V Bi-CMOS process
• VIN OK guaranteed turn on PWM Clock at 2.5V instead of 1.5V
• Internally synchronized leading edge PFC and trailing edge PWM Clock in one IC
• Slew rate enhanced transconductance error amplifier for ultra-fast PFC response
• Low start-up current (100ŁgA typ.)
• Low operating current (3.0mA type.)
• Low total harmonic distortion, high PF
• Reduces ripple current in the storage capacitor between the PFC and PWM sections
• Average current, continuous or discontinuous boost leading edge PFC
• VCC OVP Comparatoru Low Power Detect Comparator
• PWM configurable for current mode or voltage mode operation
• Current fed gain modulator for improved noise immunity
• Brown-out control, over-voltage protection, UVLO, and soft start, and Reference OK

• Desktop PC Power Supply
• Internet Server Power Supply
• IPC Power Supply
• UPS
• Battery Charger
• DC Motor Power Supply
• Monitor Power Supply
• Telecom System Power Supply
• Distributed Power

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Packages

• CM6500IP: 16-PIN PDIP (P16)
• CM6500IS: 16-PIN Wide SOP (S16)
• CM6501IP: 16-PIN PDIP (P16)
• CM6501IS: 16-PIN Wide SOP (S16)

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