MC33368 Datasheet, PDF (1/20 Pages) ON Semiconductor – High Voltage GreenLine Power Factor Controller

MC33368
High Voltage GreenLine™
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.
• Lossless Off–Line Startup
• Output Overvoltage Comparator
• Leading Edge Blanking (LEB) for Noise Immunity
• Watchdog Timer to Initiate Switching
• Restart Delay Timer
http://onsemi.com
16
1
16
MARKING
DIAGRAMS
16
DIP–16
P SUFFIX
CASE 648
MC33368P
AWLYYWW
1
16
SO–16
D SUFFIX
CASE 751K
MC33368D
AWLYWW
1
1
A = Assembly Location
WL = Wafer Lot
YY, Y = Year
WW = Work Week
PIN CONNECTIONS
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
(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
13 Frequency Clamp
12 VCC
11 Gate
10 PGnd
9 LEB
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC33368D
SO–16
48 Units/Rail
MC33368DR2
SO–16 2500 Tape & Reel
MC33368P
DIP–16
25 Units/Rail
© Semiconductor Components Industries, LLC, 2000
1
April, 2000 – Rev. 4
Publication Order Number:
MC33368/D