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MC33368_05 Datasheet, PDF (1/16 Pages) ON Semiconductor – High Voltage GreenLine TM Power Factor Controller
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
• Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
September, 2005 − Rev. 8
16
1
16
1
http://onsemi.com
MARKING
DIAGRAMS
16
PDIP−16
P SUFFIX
CASE 648
MC33368P
AWLYYWWG
1
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
16 Line
15 N/C
14 N/C
13 Frequency Clamp
12 VCC
11 Gate
10 PGND
9 LEB
5.0 Vref 1
Restart Delay 2
Voltage FB 3
Comp 4
Mult 5
Current Sense 6
Zero Current 7
AGND 8
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.
Publication Order Number:
MC33368/D
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