FAN6961 Fairchild Semiconductor, FAN6961 Datasheet

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FAN6961

Manufacturer Part Number
FAN6961
Description
The FAN6961 is an 8-pin, boundary-mode, PFC controller IC intended for controlling PFC pre-regulators
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2009 Fairchild Semiconductor Corporation
FAN6961 • Rev. 1.0.3
FAN6961
Boundary Mode PFC Controller
Features
Applications
Ordering Information
FAN6961SZ
FAN6961DZ
FAN6961SY
Number
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
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: 10µA Typical
Low Operating Current: 4.5mA Typical
Feedback Open-Loop Protection
Programmable Maximum On-Time (MOT)
Output Over-Voltage Clamping Protection
Clamped Gate Output Voltage 16.5V
Electric Lamp Ballasts
AC-DC Switching Mode Power Converter
Open Frame Power Supplies and Power Adapters
Flyback Power Converters with ZCS / ZVS
Part
Temperature Range
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Operating
8-Pin, Small Outline Package (SOP)
8-Pin, Dual In-line Package (DIP)
8-Pin, Small Outline Package (SOP)
Package
Description
The FAN6961 is an 8-pin, boundary-mode, PFC
controller
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 20µA
and the operating current has been reduced to under
6mA. The supply voltage can be up to 25V, maximizing
application flexibility.
IC
intended
Eco Status
Green
RoHS
RoHS
for
controlling
Tape & Reel
Tape & Reel
June 2009
www.fairchildsemi.com
Packing
Method
PFC
Tube
pre-

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FAN6961 Summary of contents

Page 1

... For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 Description The FAN6961 is an 8-pin, boundary-mode, PFC controller IC intended regulators. The FAN6961 provides a controlled on-time to regulate the output DC voltage and achieve natural power factor correction ...

Page 2

... Application Diagram Block Diagram © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 Figure 1. Typical Application Figure 2. Function Block Diagram 2 www.fairchildsemi.com ...

Page 3

... Driver Output. Totem-pole driver output to drive the external power MOSFET. The clamped 7 GATE gate output voltage is 16.5V. 8 VCC Power Supply. Driver and control circuit supply voltage. © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 F- Fairchild Logo Z- Plant Code X- Year Code Y- Week Code TT: Die Run Code T: Package Type (S=SOP, D=DIP Free M: Manufacture Flow Code Figure 3 ...

Page 4

... The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol T Operating Ambient Temperature A © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 Parameter Parameter 4 Min. Max. 30 -0.3 30 ...

Page 5

... Z OUT V Output Voltage Low OL V Output Voltage High OH t Rising Time R t Falling Time F © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 = -40°C to 125°C. Current is defined as positive into the device and J Conditions V =V – 0.16V CC CC-ON V =12V, V =0V =3nF, f ...

Page 6

... Disable Function Debounce Time ZCD-DIS Maximum On Time Section V Maximum On Time Voltage MOT Maximum On Time Programming t ON-MAX (Resistor Based) © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 =-40°C to 125°C. Current is defined as positive into the device and negative J Conditions V Increasing ZCD V Decreasing ZCD I ...

Page 7

... Temperature (℃) Figure 5. V REF 24.60 24.52 24.44 24.36 24.28 24.20 -40 -25 - Temperature (℃) Figure 7. t ON-MAX 10.5 10.1 9.7 9.3 8.9 8.5 -40 -25 - Temperature (℃) Figure 9. V th-OFF © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 3.0 2.4 1.8 1.2 0.6 0 110 125 -40 -25 -10 vs 14.0 13.4 12.8 12.2 11.6 11 110 125 vs 16.0 13.6 11.2 8.8 6 ...

Page 8

... Temperature (℃) Figure 11. V MOT 0.87 0.85 0.83 0.81 0.79 0.77 -40 -25 - Temperature (℃) Figure 13 © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 (Continued) 18.0 17.4 16.8 16.2 15.6 15 110 125 vs 110 125 vs -40 -25 - ...

Page 9

... Slope compensation and built-in debounce circuit can alleviate this problem. Because the FAN6961 has a single ground pin, high sink current at the output cannot be returned separately. Good high-frequency or RF layout practices should be followed. Avoiding long PCB traces and component leads, locating compensation and filter components near to the FAN6961, and increasing the power MOSFET gate resistance improve performance ...

Page 10

... Reference Circuit © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 Figure 14. Reference Circuit 10 www.fairchildsemi.com ...

Page 11

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 9.83 9.00 6.67 6.096 3 ...

Page 12

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0 ...

Page 13

... Fairchild Semiconductor Corporation FAN6961 • Rev. 1.0.3 13 www.fairchildsemi.com ...

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