?Semiconductor Components Industries, LLC, 2011
August, 2011 Rev. 11
1
Publication Order Number:
MC33368/D
MC33368
High Voltage GreenLinet
Power Factor Controller
The MC33368 is an active power factor controller that functions as a
boost preconverter in offline 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 V
CC
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 cyclebycycle current limiting.
Features
" Lossless OffLine Startup
" Output Overvoltage Comparator
" Leading Edge Blanking (LEB) for Noise Immunity
" Watchdog Timer to Initiate Switching
" Restart Delay Timer
" This is a PbFree Device*
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
SO16
D SUFFIX
CASE 751K
1
16
MARKING
DIAGRAM
A
= Assembly Location
WL = Wafer Lot
YY, Y = Year
WW = Work Week
G
= PbFree Package
PIN CONNECTIONS
1
16
13
12
11
10
9
2
3
4
5
6
7
8
5.0 V
ref
Restart Delay
Voltage FB
Current Sense
Zero Current
AGND
Line
LEB
Comp
Mult
Frequency Clamp
V
CC
Gate
PGND
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MC33368D
AWLYWWG
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
ORDERING INFORMATION
1
16
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