December 2013
?2013 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6961 " Rev. 1.0.6
FAN6961
Boundary Mode PFC Controller
Features
?   Boundary Mode PFC Controller
?   Low Input Current THD
?   Controlled On-Time PWM
?   Zero-Current Detection
?   Cycle-by-Cycle Current Limiting
?   Leading-Edge Blanking instead of RC Filtering
?   Low Startup Current: 10 ?/SPAN>A Typical
?   Low Operating Current: 4.5 mA Typical
?   Feedback Open-Loop Protection
?   Programmable Maximum On-Time (MOT)
?   Output Over-Voltage Clamping Protection
?   Clamped Gate Output Voltage 16.5 V
Applications
?   Electric Lamp Ballasts
?   AC-DC Switching Mode Power Converter
?   Open Frame Power Supplies and Power Adapters
?   Flyback Power Converters with ZCS / ZVS
Description
The   FAN6961   is   an   8-pin,   boundary-mode,   PFC
controller IC intended for controlling PFC pre-regulators.
The FAN6961 provides a controlled on-time to regulate
the output DC voltage and achieve natural power factor
correction. The maximum on-time of the external switch
is programmable to ensure safe operation during AC
brownouts. An innovative multi-vector error amplifier is
built in to provide rapid transient response and precise
output voltage clamping. A built-in circuit disables the
controller if the output feedback loop is opened. The
startup current is lower than 20 礎 and the operating
current has been reduced to under 6 mA. The supply
voltage can be up to 25 V, maximizing application
flexibility.
Ordering Information
Part Number
Operating Temperature
Range
Package
Packing Method
FAN6961SZ
-40癈 to +125癈
8-Pin, Small Outline Package (SOP)
(1)
Tape & Reel
FAN6961DZ
-40癈 to +125癈
8-Pin, Dual In-line Package (DIP)
Tube
FAN6961SY
-40癈 to +125癈
8-Pin, Small Outline Package (SOP)
(1)
Tape & Reel
Note:
1.    SZ &SY are for Eco status, please refer to http://fsce132/pf/FA/FAN6961.html
.