GENERAL DESCRIPTION
 The CM6805BO is the Green-Mode PFC/PWM Combo controller for Desktop PC and High Density AC Adapter.
For the power supply, it’s input current shaping PFC performance could be very close to the performance of the CM6800 or ML4800 leading edge modulation average current topology.
CM6805BO 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 CM6805BO includes circuits for the implementation of a leading edge modulation, input current shaping technique “boost” type PFC and a trailing edge modulation current, PWM.
The CM6805BO’s PFC and PWM operate at the same frequency, 100kHz.
A PFC OVP comparator shuts down the PFC section in the event of a sudden decrease in load.
The PFC section also includes peak current limiting for enhanced system reliability.
PFC has a PFCOFFB pin which can use for AC brown out application and determine the GMth to turn off PFC.

FEATURES
* 10-Pin SOIC package.
* Use RAC around 4~8 Mega Ohm at IAC pin.
* Easy to configure into Boost Follower.
* 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.
* Feed forward IAC pin to do the automatic slope compensation.
* PFCOVP, Precision -1V PFC ILIMIT, PFC Tri-Fault Detect comparator to meet UL1950
* 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
* VIN-OK Comparator to guarantee to enable PWM when PFC reach steady state
* High efficiency trailing-edge current mode PWM
* Exact 50% PWM maximum duty cycle
* UVLO, REFOK, and brownout protection
* Digital PFC and PWM soft start, ~10mS
* Precision PWM 1.5V current limit for current mode operation
* PFCOFFB pin to sense light load to turn off PFC or PFCOFFB pin to sense Input voltage as AC Brown Out

CM6805BOGIR

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Features
■ Proprietary multiplier design for minimum thd
■ Very accurate adjustable output overvoltage
protection
■ Ultra-low (30µA) Start-up current
■ Low (2.5mA) quiescent current
■ Digital leading-edge blanking on current sense
■ Disable function on E/A input
■ 1.4% (@ TJ = 25 °C) internal reference voltage
■ -600/+800mA totem pole gate driver with active
pull-down during UVLO and voltage clamp
■ DIP-8/SO-8 packages

Applications
PFC pre-regulators for:
■ IEC61000-3-2 compliant SMPS (Flat TV,
desktop PC, games)
■ HI-END AC-DC adapter/charger up to 400W
■ Electronic ballast
■ Entry level server & web server

Description
 The L6562A is a current-mode PFC controller operating in Transition Mode (TM). Coming
with the same pin-out as its predecessors L6561 and L6562, it offers improved performance.
The highly linear multiplier includes a special circuit, able to reduce AC input current
distortion, that allows wide-range-mains operation with an extremely low THD, even over a
large load range.

 The output voltage is controlled by means of a voltage-mode error amplifier and an accurate
(1.4% @TJ = 25°C) internal voltage reference.
The device features extremely low consumption (60µA max. before start-up and <5 mA
operating) and includes a disable function suitable for IC remote ON/OFF, which makes it
easier to comply with energy saving requirements (Blue Angel, EnergyStar, Energy2000,
etc.).

 An effective two-step OVP enables to safely handle overvoltages either occurring at start-up
or resulting from load disconnection.
The totem-pole output stage, capable of 600 mA source and 800 mA sink current, is suitable
to drive high current MOSFETs or IGBTs. This, combined with the other features and the
possibility to operate with the proprietary Fixed-Off-Time control, makes the device an
excellent low-cost solution for EN61000-3-2 compliant SMPS in excess of 350W.

L6562AN
L6562AD
L6562ADTR

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