MC33260_05 Datasheet, PDF (1/22 Pages) ON Semiconductor – GreenLine TM Compact Power Factor Controller: Innovative Circuit for Cost Effective Solutions

MC33260
GreenLinet Compact
Power Factor Controller:
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 Startup and Operating Current
• Improved Regulation Block Dynamic Behavior
• Synchronization Capability
• Internally Trimmed Reference Current Source
• Pb−Free Packages are Available
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
L1
D1
1
2
3
4
CT
8 ^VCC
7
M1
6
5
Sync
+ C1
LOAD
(SMPS, Lamp
Ballast,...)
Ro
DIP−8 CONFIGURATION SHOWN
Figure 1. Typical Application
8
1
http://onsemi.com
PDIP−8
P SUFFIX
CASE 626
MARKING
DIAGRAMS
8
MC33260P
AWL
YYWWG
1
8
1
SO−8
D SUFFIX
CASE 751
8
33260
ALYW
G
1
A
WL, L
YY, Y
WW, W
G or G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
Feedback Input 1
8 V_CC
V_control
Oscillator
Capacitor (C_T)
Current Sense
Input
2
7
3
6
4
5
MC33260P
Gate Drive
Gnd
Synchronization
Input
Oscillator
Capacitor (C_T)
Current Sense
Input
Synchronization
Input
Gnd
1
8
2
7
3
6
4
5
MC33260D
V_control
Feedback Input
V_CC
Gate Drive
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 20 of this data sheet.
© Semiconductor Components Industries, LLC, 2005
1
September, 2005 − Rev. 9
Publication Order Number:
MC33260/D