SG6961SY

Manufacturer Part NumberSG6961SY
DescriptionIC PFC CTRLR AVERAGE CURR 8SOIC
ManufacturerFairchild Semiconductor
SG6961SY datasheet
 

Specifications of SG6961SY

ModeAverage CurrentFrequency - Switching50kHz
Current - Startup10µAVoltage - Supply12 V ~ 20 V
Operating Temperature-20°C ~ 125°CMounting TypeSurface Mount
Package / Case8-SOIC (3.9mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
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SG6961
Critical Conduction 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: 10µA (Typical)
Low Operating Current: 4.5mA (Typical)
Feedback Open-Loop Protection
Programmable Maximum On-Time
Output Over-Voltage Clamping Protection
Clamped Gate Output Voltage 16.5V
Applications
Electric Lamp Ballasts
AC-DC Switching Mode Power Converter
Open-Frame Power Supplies and Power Adapters
Ordering Information
Part Number
Temperature Range
SG6961SZ
-30°C to +85°C
SG6961DZ
-30°C to +85°C
SG6961SY
-30°C to +85°C
© 2008 Fairchild Semiconductor Corporation
SG6961 • Rev. 1.3.2
Description
The SG6961 is an 8-pin boundary mode PFC controller
IC intended for controlling PFC pre-regulators. The
SG6961 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 is under 4.5mA. The supply voltage can be up to
20V, maximizing application flexibility.
Operating
8-Pin Small Outline Package (SOP)
8-Pin Dual Inline Package (DIP)
8-Pin Small Outline Package (SOP)
June 2010
Package
Packing Method
Tape & Reel
Tube
Tape & Reel
www.fairchildsemi.com

SG6961SY Summary of contents

  • Page 1

    ... Ordering Information Part Number Temperature Range SG6961SZ -30°C to +85°C SG6961DZ -30°C to +85°C SG6961SY -30°C to +85°C © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Description The SG6961 is an 8-pin boundary mode PFC controller IC intended for controlling PFC pre-regulators. The ...

  • Page 2

    ... Application Circuit VAC Block Diagram © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 ZCD INV COMP VCC GD SG6961 CS MOT GND Figure 1. Typical Application Figure 2. Block Diagram 2 Vo www.fairchildsemi.com ...

  • Page 3

    ... Marking Information ※ Marking for SG6961SZ (pb-free) ※ Marking for SG6961DZ (pb-free) ※ Marking for SG6961SY (Green-Compound) © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 T- D=DIP, S=SOP P- Z=Lead Free + ROHS Compatible Null=Regular Package XXXXXXXX- Wafer Lot Y: Year; WW: Week V: Assembly Location ...

  • Page 4

    ... VCC and GND is recommended. Driver Output. Totem-pole driver output to drive the external power MOSFET. The clamped 7 GD gate output voltage is 16.5V. 8 VCC Power Supply. Driver and control circuit supply voltage. © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Figure 4. Pin Configuration 4 www.fairchildsemi.com ...

  • Page 5

    ... 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 © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Parameter SOP DIP SOP DIP ...

  • Page 6

    ... Zero Duty Cycle Output V OZ Voltage Over Voltage Protection V INV-OVP for INV Input Under Voltage Protection V INV-UVP for INV Input Source Current I COMP Sink Current © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Conditions Min – 0.16V CC CC-ON V =12V, V =0V ...

  • Page 7

    ... Limit) V Disable Threshold Voltage DIS Disable Function t ZCD-DIS Debounce Time Maximum On-Time Section Maximum On Time V MOT Voltage Maximum On Time t Programming ON-MAX (Resistor Based) © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Conditions Min. 0.77 R =24kΩ MOT V =20V 15 =15V, I =100mA ...

  • Page 8

    ... Temperature (℃) Figure 7. Maximum On-Time Turn-off Voltage (Vth_off) vs Temperature 10.20 10.00 9.80 9.60 9.40 9.20 9.00 8.80 8.60 -40 -25 - Temperature (℃) Figure 9. Turn-Off Voltage © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3 110 125 110 125 110 125 8 Continuously Operating Voltage (Icc_op) vs ...

  • Page 9

    ... Over-Voltage Protection CC MOT Voltage (Vmot) vs Temperature 1.289 1.287 1.285 1.283 1.281 1.279 1.277 1.275 -40 -25 - Temperature (℃) Figure 13. MOT Voltage © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 (Continued 110 125 Figure 12. Output Voltage Maximum-Clamp 110 125 Figure 14. Threshold Voltage for Peak Current Limit ...

  • Page 10

    ... A high voltage in CS pin terminates a switching cycle immediately and cycle-by-cycle current limit is achieved. The designed threshold of the protection point is 0.82V. © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Leading-Edge Blanking (LEB) A turn-on spike on CS pin appears when the power MOSFET is switched on ...

  • Page 11

    ... Reference Circuit © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 Figure 15. Reference Circuit 11 www.fairchildsemi.com ...

  • Page 12

    ... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. 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’ ...

  • Page 13

    ... JEDEC MS-001 VARIATION BA B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR EXTRUSIONS. D) DIMENSIONS AND TOLERANC ES PER ASME Y14.5M-1994 E) DRAWING FILENAME AND REVSION: MKT-N08FREV2. © 2008 Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 9.83 9.00 6.67 6.096 3.683 3 ...

  • Page 14

    ... Fairchild Semiconductor Corporation SG6961 • Rev. 1.3.2 14 www.fairchildsemi.com ...