SG6961SZ Fairchild Semiconductor, SG6961SZ Datasheet

IC PFC CTRLR AVERAGE CURR 8SOP

SG6961SZ

Manufacturer Part Number
SG6961SZ
Description
IC PFC CTRLR AVERAGE CURR 8SOP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of SG6961SZ

Mode
Average Current
Frequency - Switching
50kHz
Current - Startup
10µA
Voltage - Supply
12 V ~ 20 V
Operating Temperature
-20°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Output Voltage
1.4 V to 8 V
Input Voltage
0.3 V to 12 V
Switching Frequency
65 KHz
Operating Temperature Range
- 30 C to + 85 C
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SG6961SZ
Manufacturer:
FC
Quantity:
2 730
Part Number:
SG6961SZ
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
SG6961SZ31AM8513802Q
Quantity:
339
© 2008 Fairchild Semiconductor Corporation
SG6961 • Rev. 1.3.2
SG6961
Critical Conduction Mode PFC Controller
Features
Applications
Ordering Information
Part Number
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
Electric Lamp Ballasts
AC-DC Switching Mode Power Converter
Open-Frame Power Supplies and Power Adapters
SG6961SZ
SG6961DZ
SG6961SY
Temperature Range
-30°C to +85°C
-30°C to +85°C
-30°C to +85°C
Operating
8-Pin Small Outline Package (SOP)
8-Pin Dual Inline Package (DIP)
8-Pin Small Outline Package (SOP)
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.
Package
Packing Method
Tape & Reel
Tape & Reel
June 2010
Tube
www.fairchildsemi.com

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SG6961SZ Summary of contents

Page 1

... 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 ...

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 ...

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