MC33260 Datasheet, PDF (1/20 Pages) ON Semiconductor – GreenLine Compact Power Factor Controller:Innovative Circuit for Cost Effective Solutions

MC33260
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GPoreweenrLFinaec™_toCr oCmonptarcotller:
Innovative Circuit for
Cost Effective Solutions
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
• 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
Safety Features
• 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
D1...D4
Filtering
Capacitor
Vcontrol
R _cs
ROCP
TYPICAL APPLICATION
L1
D1
1
2
3
4
CT
8 ^VCC
7
M1
6
5
Sync
+ C1
LOAD
(SMPS, Lamp
Ballast,...)
Ro
http://onsemi.com
8
1
DIP–8
P SUFFIX
CASE 626
PIN CONNECTIONS AND
MARKING DIAGRAM
Feedback Input 1
8 VCC
Vcontrol 2
Oscillator
Capacitor (CT)
3
Current Sense
Input
4
7 Gate Drive
6 Gnd
5
Synchronization
Input
AWL = Manufacturing Code
YYWW = Date Code
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC33260P
Plastic DIP–8 50 Units / Rail
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
1
November, 1999 – Rev. 1
Publication Order Number:
MC33260/D