IC PFC CONTROLLER CCM 16SOP

SG6932SZ

Manufacturer Part NumberSG6932SZ
DescriptionIC PFC CONTROLLER CCM 16SOP
ManufacturerFairchild Semiconductor
SG6932SZ datasheet
 

Specifications of SG6932SZ

ModeContinuous Conduction (CCM)Frequency - Switching65kHz
Current - Startup10µAVoltage - Supply14 V ~ 20 V
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / Case16-SOIC (3.9mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
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SG6932
PFC / Forward PWM Controller
Features
Interleaved PFC/PWM Switching
Low Operating Current
Innovative Switching-Charge Multiplier-divider
Multi-vector Control for Improved PFC Output
Transient Response
Average Current Mode for Input-current Shaping
PFC Over-voltage and Under-voltage Protections
PFC and PWM Feedback Open-loop Protection
Cycle-by-cycle Current Limiting for PFC/PWM
Slope Compensation for PWM
Selectable PWM Maximum Duty Cycle: 50%, 65%
Brownout Protection
Power-on Sequence Control and Soft-start
Applications
Switch-mode Power Supplies with Active PFC
Servo-system Power Supplies
PC-ATX Power Supplies
Ordering Information
Part
Operating Temperature
Number
Range
SG6932DZ
-40°C to +85°C
SG6932SZ
-40°C to +85°C
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2007 Fairchild Semiconductor Corporation
SG6932 • Rev. 1.1.3
Description
The highly integrated SG6932 is designed for power
supplies with boost PFC and forward PWM. It requires
very few external components to achieve versatile
protections and compensation. It is available in 16-pin
DIP and SOP packages.
The
proprietary
synchronizes the PFC and PWM stages and reduces
switching noise. At light load, the switching frequency is
continuously decreased to reduce power consumption.
For PFC stage, the proprietary multi-vector control
scheme provides a fast transient response in a low-
bandwidth PFC loop; in which the overshoot and
undershoot of the PFC voltage are clamped. If the
feedback loop is broken, SG6932 shuts off to prevent
extra-high voltage on output.
For the forward PWM stage, the synchronized slope
compensation ensures the stability of the current loop
under continuous-conduction-mode (CCM) operation.
Hiccup
operation
guaranteed. The soft-start and programmable maximum
duty cycle ensure safe operation.
SG6932 provides complete protection functions, such
as brownout protection and RI open/short latch off.
Package
16-pin Dual In-Line Package (DIP)
16-pin Small Outline Package (SOP)
May 2008
interleave-switching
feature
during
output
overloading
is
Packing
Eco Status
Method
RoHS
Tube
RoHS
Tape & Reel
www.fairchildsemi.com

SG6932SZ Summary of contents

  • Page 1

    ... Part Operating Temperature Number Range SG6932DZ -40°C to +85°C SG6932SZ -40°C to +85°C For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Description The highly integrated SG6932 is designed for power supplies with boost PFC and forward PWM ...

  • Page 2

    ... Application Diagram © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Figure 1. Typical Application 2 www.fairchildsemi.com ...

  • Page 3

    ... Block Diagram © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Figure 2. Function Block Diagram 3 www.fairchildsemi.com ...

  • Page 4

    ... Marking Information SG6932TP XXXXXXXXYWWV Pin Configuration © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 T: D=DIP, S=SOP P : XXXXXXXX: Wafer Lot Y: Year; WW: Week V: Assembly Location Figure 3. Top Mark VRMS IEA 3 14 IPFC IMP 12 6 ISENSE 11 FBPWM 7 10 IPWM 8 9 Figure 4. Pin Configuration (Top View) ...

  • Page 5

    ... A large capacitor value results in a narrow bandwidth and improves the power factor. Input AC Current. For normal operation, this input is used to provide current reference for the 16 IAC multiplier. The suggested maximum I © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 ]kHz, where kΩ. For example 360µ ...

  • Page 6

    ... 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 Parameter T Operating Ambient Temperature A © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Parameter <50°C) A DIP SOP Min. ...

  • Page 7

    ... Clamp-Low Gain FBPFC-L I Maximum Source Current FBPFC-L I Maximum Sink Current FBPFC-H UVP PFC Feedback Under-Voltage Protection VFB V Voltage Level on FBPFC to Disable OPWM OFF-FBPFC © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Conditions V – 0.16V 15V; OPFC OPWM open DD OVP1 R =24kΩ =24kΩ ...

  • Page 8

    ... Output Voltage Maximum V Z-PFC (Clamp) V Output Voltage Low OL-PFC V Output Voltage High OH-PFC t Rising Time R-PFC t Falling Time F-PFC DC Maximum Duty Cycle MAX © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 (Continued) Conditions EA V =0~1. =24kΩ =20+I •0. =24kΩ ...

  • Page 9

    ... Constant Current Output for I SS Soft-Start V Voltage of SS for 50% Maximum Duty Cycle DC-MAX-50% V Voltage of SS for 65% Maximum Duty Cycle DC-MAX-65% R Discharge Resistance D © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 (Continued) Conditions R =24kΩ =24kΩ =15V, OPWM DD Drops to 9V =△ ...

  • Page 10

    ... FB Voltage (V) Figure 9. Duty Cycle vs. FB Voltage © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 11.0 10.8 10.6 10 ...

  • Page 11

    ... Temperature (℃) Figure 15. Reference Voltage vs. Temperature © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 (Continued) 68.0 67.5 67.0 66.5 66.0 65.5 65.0 64.5 64.0 63.5 63.0 62.5 62.0 50℃ ...

  • Page 12

    ... Temperature (℃) Figure 21. PWM Open-Loop Protection Delay Time vs. Temperature Figure 23. Peak Current Limit Threshold Voltage vs. Temperature © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 (Continued) 120.0 110.0 100.0 90.0 80.0 70.0 60.0 50.0 40 ...

  • Page 13

    ... I multiplier. For the linear range of I range input voltage should be connected to a resistance over 1.2MΩ. Figure 24. Input Voltage Detection © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Switching Frequency / Current Sources The switching frequency can be programmed by the resistor R ...

  • Page 14

    ... EA Equation 3. Good RC filtering for V bandwidth (lower than the line frequency) for voltage loop are suggested for better input current shaping. © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 The transconductance error amplifier has output impedance R 10μF) connected to ground (as shown in Figure 28). ...

  • Page 15

    ... SS pin is quickly discharged. FBPFC OPFC 4ms OPWM Figure 30. Power-On Sequence © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Forward PWM and Slope Compensation The PWM stage is designed for forward power converters. Peak-current-mode control is used to optimize system performance. Slope compensation is added to stabilize the current loop ...

  • Page 16

    ... The ground trace 3 is independently tied from the decoupling capacitor to the PFC output capacitor © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 The ground in the output capacitor C ground reference for power switching. To provide a good ground reference and reduce the switching noise ...

  • Page 17

    ... Reference Circuit © 2007 Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 Figure 33. Reference Circuit 17 www.fairchildsemi.com ...

  • Page 18

    ... 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 19

    ... 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 20

    ... Fairchild Semiconductor Corporation SG6932 • Rev. 1.1.3 20 www.fairchildsemi.com ...