MC33260
Product Preview
GreenLine
™
Compact
Power Factor Controller:
Innovative Circuit for
Cost Effective Solutions
http://onsemi.com
The MC33260 is a controller for Power Factor Correction
preconverters meeting international standard requirements in
electronic ballast and off–line power conversion applications.
Designed to drive a free frequency discontinuous mode, it can also be
synchronized and in any case, it features very effective protections that
ensure a safe and reliable operation.
This circuit is also optimized to offer extremely compact and cost
effective PFC solutions. While it requires a minimum number of
external components, the MC33260 can control the follower boost
operation that is an innovative mode allowing a drastic size reduction
of both the inductor and the power switch. Ultimately, the solution
system cost is significantly lowered.
Also able to function in a traditional way (constant output voltage
regulation level), any intermediary solutions can be easily
implemented. This flexibility makes it ideal to optimally cope with a
wide range of applications.
General Features
8
1
DIP–8
P SUFFIX
CASE 626
PIN CONNECTIONS AND
MARKING DIAGRAM
Feedback Input
Vcontrol
Oscillator
Capacitor (CT)
Current Sense
Input
1
MC33260
AWL
YYWW
(Top View)
2
3
4
8 VCC
7 Gate Drive
6 Gnd
5 Synchronization
Input
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Standard Constant Output Voltage or “Follower Boost” Mode
Switch Mode Operation: Voltage Mode
Latching PWM for Cycle–by–Cycle On–Time Control
Constant On–Time Operation That Saves the Use of an Extra Multiplier
Totem Pole Output Gate Drive
Undervoltage Lockout with Hysteresis
Low Start–Up and Operating Current
Improved Regulation Block Dynamic Behavior
Synchronization Capability
Internally Trimmed Reference Current Source
Overvoltage Protection: Output Overvoltage Detection
Undervoltage Protection: Protection Against Open Loop
Effective Zero Current Detection
Accurate and Adjustable Maximum On–Time Limitation
Overcurrent Protection
ESD Protection on Each Pin
TYPICAL APPLICATION
D1...D4
Filtering
Capacitor
L1
VCC
M1
Ro
Sync
D1
+ C1
LOAD
(SMPS, Lamp
Ballast,...)
AWL = Manufacturing Code
YYWW = Date Code
ORDERING INFORMATION
Device
MC33260P
Package
Plastic DIP–8
Shipping
50 Units / Rail
Safety Features
Vcontrol
R OCP
CT
1
2
3
4
8
7
6
5
R cs
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
©
Semiconductor Components Industries, LLC, 1999
MC33260
1
November, 1999 – Rev. 1
Publication Order Number:
MC33260/D
ONSEMI [ ON SEMICONDUCTOR ]
