High Voltage GreenLine Power Factor Controller
Description
MC33368
High Voltage GreenLinet Power Factor Controller
The MC33368 is an active power factor controller that functions as a boost preconverter in off−line power supply applications.
MC33368 is optimized for low power, high density power supplies requiring a minimum board area, reduced component count and low power dissipation.
The narrow body SOIC package provides a small footprint.
Integration of the high voltage startup saves approximately 0.
7 W of power compared to resistor bootstrapped circuits.
The MC33368 features a watchdog timer to initiate output switching, a one quadrant multiplier to force the line current to follow the instantaneous line voltage a zero current detector to ensure critical conduction operation, a transconductance error amplifier, a current sensing comparator, a 5.
0 V reference, an undervoltage lockout (UVLO) circuit which monitors the VCC supply voltage and a CMOS driver for driving MOSFETs.
The MC33368 also includes a programmable output switching frequency clamp.
Protection features include an output overvoltage comparator to minimize overshoot, a restart delay timer and cycle−by−cycle current limiting.
Features
• Lossless Off−Line Startup • Output Overvoltage Comparator • Leading Edge Blanking (LEB) for Noise Immunity • Watchdog Timer to Initiate Switching • Restart Delay Timer • This is a Pb−Free Device*
16 1
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MARKING DIAGRAM
SO−16 D SUFFIX CASE 751K
16
MC33368D AWLYWWG
1
A = Assembly Location WL = Wafer Lot YY, Y = Year WW = Work Week G = Pb−Free Package
PIN CONNECTIONS (TOP VIEW)
5.
0 Vref 1 Restart Delay 2
Voltage FB 3 Comp 4 Mult 5
Current Sense 6 Zero Current 7 AGND 8
SO−16
16 Line
13 Frequency Clamp 12 VCC 11 Gate 10 PGND 9 LEB
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 4 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques ...
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