Order this document by MC33368/D
MC33368
Advance Information
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.
HIGH VOLTAGE
GREENLINE™ POWER
FACTOR CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
(DIP–16)
•
•
•
•
•
Lossless Off–Line Startup
Output Overvoltage Comparator
Leading Edge Blanking (LEB) for Noise Immunity
Watchdog Timer to Initiate Switching
Restart Delay Timer
16
1
D SUFFIX
PLASTIC PACKAGE
CASE 751K
(SO–16)
PIN CONNECTIONS
5.0 Vref
Restart Delay
Voltage FB
Comp
Mult
Package
SO–16
TJ = –25° to +125°C
DIP–16
Current Sense
Zero Current
AGnd
1
2
DIP–16
(Top View)
SO–16
(Top View)
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
©
Motorola, Inc. 1997
Rev 2
GreenLine is a trademark of Motorola, Inc.
16 Line
15 N/C
14 N/C
13 Frequency Clamp
12 VCC
11 Gate
10 PGnd
9 LEB
3
4
5
6
7
8
ORDERING INFORMATION
Device
MC33368D
MC33368P
Operating
Temperature Range
5.0 Vref
Restart Delay
Voltage FB
Comp
Mult
Current Sense
Zero Current
AGnd
1
2
3
4
5
6
7
8
16 Line
13 Frequency Clamp
12 VCC
11 Gate
10 PGnd
9 LEB
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
