FSQ0565RQ

Manufacturer Part NumberFSQ0565RQ
DescriptionA Quasi-Resonant Converter (QRC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency
ManufacturerFairchild Semiconductor
FSQ0565RQ datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
Page 1/23

Download datasheet (3Mb)Embed
Next
FSQ0565RS/RQ
Green-Mode Fairchild Power Switch (FPS™) for
Quasi-Resonant Operation -
Features
Optimized for Quasi-Resonant Converters (QRC)
!
Low EMI through Variable Frequency Control and AVS
!
(Alternating Valley Switching)
High-Efficiency through Minimum Voltage Switching
!
Narrow Frequency Variation Range over Wide Load
!
and Input Voltage Variation
Advanced Burst-Mode Operation for Low Standby
!
Power Consumption
Simple Scheme for Sync Voltage Detection
!
Pulse-by-Pulse Current Limit
!
Various Protection Functions: Overload Protection
!
(OLP), Over-Voltage Protection (OVP), Internal
Thermal Shutdown (TSD) with Hysteresis,
Output Short Protection (OSP)
Under-Voltage Lockout (UVLO) with Hysteresis
!
Internal Startup Circuit
!
Internal High-Voltage Sense FET (650V)
!
Built-in Soft-Start (17.5ms)
!
Applications
Power Supply for LCD TV and Monitor, VCR, SVR,
!
STB, and DVD & DVD Recorder
Adapter
!
Related Resources
Visit: http://www.fairchildsemi.com/apnotes/ for:
AN-4134: Design Guidelines for Offline Forward
!
Converters Using Fairchild Power Switch (FPS
AN-4137: Design Guidelines for Offline Flyback
!
Converters Using Fairchild Power Switch (FPS
AN-4140: Transformer Design Consideration for
!
Offline Flyback Converters Using Fairchild Power
Switch (FPS
)
AN-4141: Troubleshooting and Design Tips for
!
Fairchild Power Switch (FPS
AN-4145: Electromagnetic Compatibility for Power
!
Converters
AN-4147: Design Guidelines for RCD Snubber of
!
Flyback Converters
AN-4148: Audible Noise Reduction Techniques for
!
™)
Fairchild Power Switch (FPS
AN-4150: Design Guidelines for Flyback Converters
!
Using FSQ-Series Fairchild Power Switch (FPS
© 2008 Fairchild Semiconductor Corporation
FSQ0565RS/RQ Rev. 1.0.3
Low EMI and High Efficiency
Description
A Quasi-Resonant Converter (QRC) generally shows
lower EMI and higher power conversion efficiency than a
conventional hard-switched converter with a fixed
switching frequency. The FSQ-series is an integrated
Pulse-Width
SenseFET specifically designed for quasi-resonant
operation and Alternating Valley Switching (AVS). The
PWM controller includes an integrated fixed-frequency
oscillator, Under-Voltage Lockout (UVLO), Leading-
Edge Blanking (LEB), optimized gate driver, internal soft-
start, temperature-compensated precise current sources
for a loop compensation, and self-protection circuitry.
Compared with a discrete MOSFET and PWM controller
solution, the FSQ-series can reduce total cost,
component count, size, and weight; while simultaneously
increasing efficiency, productivity, and system reliability.
This device provides a basic platform for cost-effective
designs of quasi-resonant switching flyback converters.
)
)
) Flyback Applications
Applications
)
December 2009
Modulation
(PWM)
controller
www.fairchildsemi.com
and

FSQ0565RQ Summary of contents

  • Page 1

    ... Fairchild Power Switch (FPS AN-4150: Design Guidelines for Flyback Converters ! Using FSQ-Series Fairchild Power Switch (FPS © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 Low EMI and High Efficiency Description A Quasi-Resonant Converter (QRC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency ...

  • Page 2

    ... Number FSQ0565RSWDTU TO-220F- -25 to +85°C 6L FSQ0565RQWDTU FSQ0565RSLDTU TO-220F- 6L -25 to +85°C FSQ0565RQLDTU (L-Forming) For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. Notes: 1. The junction temperature can limit the maximum output power. 2. 230V or 100/115V with doubler Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient temperature. ...

  • Page 3

    ... Figure 2. Internal Block Diagram of FSQ0565RS Sync 5 AVS OSC PWM S Q Soft- LEB Start 250ns S Q TSD R Q LPF V good CC Figure 3. Internal Block Diagram of FSQ0565RQ 3 V Drain str ref V good CC 8V/12V Gate driver AOCP 2 V GND OCP (1.1V) FSQ0565RS Rev.00 ...

  • Page 4

    ... Startup. This pin is connected directly, or through a resistor, to the high-voltage DC link. At startup, the internal high-voltage current source supplies internal bias and charges the exter str nal capacitor connected to the V disabled not recommended to connect V © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0 STR 5. Sync ...

  • Page 5

    ... Symbol θ Junction-to-Ambient Thermal Resistance JA θ Junction-to-Case Thermal Resistance JC Notes: 8. Free standing with no heat-sink under natural convection. 9. Infinite cooling condition - refer to the SEMI G30-88. © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 = 25°C, unless otherwise specified. A Parameter T = 25° 100° ...

  • Page 6

    ... FB D Minimum Duty Cycle MIN V START UVLO Threshold Voltage V STOP t Internal Soft-Start Time S/S V Over-Voltage Protection (FSQ0565RS) OVP V OVP Over-Voltage Protection (FSQ0565RQ) t OVP BURST-MODE SECTION V BURH V Burst-Mode Voltages BURL Hysteresis © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 Condition 100µ ...

  • Page 7

    ... STR Notes: 10. Propagation delay in the control IC. 11. Guaranteed by design; not tested in production. 12. Includes gate turn-on time. © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 (Continued) Condition FSQ0565RS T = 25°C, di/dt = 370mA/µs J FSQ0565RQ T = 25°C, di/dt = 370mA/µ 15V (11 25°C ...

  • Page 8

    ... Frequency PWM Frequency EMI Reduction Modulation Hybrid Control Burst-Mode Burst-Mode Operation Operation Strong Protections OLP, OVP 145°C without TSD Hysteresis Differences Between FSQ0565RS and FSQ0565RQ Function FSQ0565RS I 2.25A LIM V OVP CC Over Voltage (triggered by V Protection voltage) © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev ...

  • Page 9

    ... Figure 5. Operating Supply Current (I 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 7. UVLO Stop Threshold Voltage (V ) vs. T STOP 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 9. Initial Switching Frequency (f © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 6. UVLO Start Threshold Voltage OP A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 Figure 8 ...

  • Page 10

    ... Figure 11. Blanking Time (t 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 13. Shutdown Delay Current (I 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 15. Burst-Mode Low Threshold Voltage (V ) vs. T burl © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 (Continued) = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 12. Feedback Source Current ( 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 - ...

  • Page 11

    ... Temperature [°C] Figure 19. Shutdown Feedback Voltage (V 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 21. Sync High Threshold Voltage vs. T SH2 © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 (Continued) = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 Figure 18. Sync Low Threshold Voltage 1 A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 20 ...

  • Page 12

    ... FB KA431 - V SD FSQ0565 Rev.00 Figure 24. Pulse-Width-Modulation (PWM) Circuit © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 2.1 Pulse-by-Pulse Current Limit: Because current- mode control is employed, the peak current through the SenseFET is limited by the inverting input of PWM comparator (V pin that the 0.9mA current source flows only through the ...

  • Page 13

    ... Figure 26. V > 4. sync t =15us sync internal delay Figure 27. V < 4. sync © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0 case of a heavy W and waits for goes below sync , the Figure 28. After Protection Circuits: The FSQ-series has several ...

  • Page 14

    ... The voltage across the resistor is compared with a preset AOCP level. If the sensing resistor voltage is greater than the AOCP level, the set signal is applied to the latch, resulting in the shutdown of the SMPS. © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0 FSQ0765R Rev.00 Figure 31 ...

  • Page 15

    ... CC 4.4.2 Sync Over-Voltage FSQ0565RQ: If the secondary-side feedback circuit malfunctions or a solder defect causes an opening in the feedback path, the current through the opto-coupler transistor becomes almost zero. V similar manner to the overload situation, forcing the preset maximum current to be supplied to the SMPS until the overload protection triggers ...

  • Page 16

    ... Figure 35. QRC Operation with Limited Frequency © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 To overcome these problems, FSQ-series employs a frequency-limit function, as shown in Figures 35 and 36. Once the SenseFET is turned on, the next turn-on is prohibited during the blanking time (t blanking time, the controller finds the valley within the detection time window (t shown in Figures 35 and Figure 36 (Cases A, B, and C) ...

  • Page 17

    ... Those traces should not draw across or close to the drain line. When the heat sink is connected to the ground, it should be connected to the power ground. If possible, avoid using jumper wires for power ground and drain. © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 V continued 2 pulses V ...

  • Page 18

    ... LF101 30mH R101 12MΩ 1W C101 RT1 150nF F1 5D-9 275V AC FUSE 250V 2A © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 Input Voltage Rated Output Power Range 85-265V AC input and 0.5W load R103 C104 3.3nF 43kΩ 2 630V 1W D101 1N 4007 ...

  • Page 19

    ... Insulation: Polyester Tape t = 0.025mm, 2 Layers N /2 14V Insulation: Polyester Tape t = 0.025mm, 2 Layers Bottom Electrical Characteristics Inductance Leakage 5. Core & Bobbin Core: EER3016 (Ae=109.7mm ! Bobbin: EER3016 ! © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 FSQ0565RS Rev.0 14V ...

  • Page 20

    ... C105 33nF/50V C106 100nF/50V C107 47µF/50V Electrolytic (Samyoung) C201 1000µF/25V C202 1000µF/25V C203 2200µF/10V C204 1000µF/10V © 2008 Fairchild Semiconductor Corporation FSQ0565RS/RQ Rev. 1.0.3 Note Part C205 1W C301 1/2W 1W L201 jumper L202 optional, 1/4W 1/4W, 1% D101 ...

  • Page 21

    ... 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 22

    ... 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 23

    ... TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended exhaustive list of all such trademarks. AccuPower Auto-SPM Build it Now CorePLUS CorePOWER CROSSVOLT CTL™ Current Transfer Logic™ ® ...