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Summary of Contents for Fairchild FPS Series
- Page 1 ™ Fairchild’s Power Switch for Switch Mode Power Supply Design Guide Building Block Solutions for Multi-Market www.fairchildsemi.com Applications...
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Page 3: Table Of Contents
™ Design Guide Table Of Contents What is Fairchild Power Switch FPS™ .......................5 FPS™ Integrated Solution .........................6 Green FPS™ – New FPS™ Family......................7 Green FPS™ Features and Advantages......................8 Burst Mode Operation ........................9 Frequency Modulation for EMI ......................10 Over Load Protection ........................11 FPS™... -
Page 5: What Is Fairchild Power Switch Fps
AC to DC but also integrates a myriad of control and protection circuitry that makes yesterday’s off-line converters bulky by comparison. Fairchild Power Switch (FPS™) is a family of products that combines the avalanche rugged power SenseFET with state-of-the-art PWM circuitry to address a variety of Switch Mode Power Supplies (SMPS). -
Page 6: Fps™ Integrated Solution
™ Design Guide ™ Integrated Solution MOSFET – Drive Input MOSFET Current Sensing Controller Startup UC3842 Resistor Comp Vref Isense RtCt Softstart Frequency Setting Optimally Integrated Solution for Off-Line Switch Mode Power Supplies • Integrated features in a single package –... -
Page 7: Green Fps™ - New Fps™ Family
™ Design Guide Green FPS™ – New FPS™ Family Output Power GreenFPS™ Additional Features Application Example Level Part Number Low Power FSD200 Self biasing (FSD200) Charger FSD210 Frequency modulation Auxiliary supply (for small display or controller boards in white goods for example) FSDM311 Burst mode FSDL312... -
Page 8: Green Fps™ Features And Advantages
™ Design Guide Green FPS™ Features and Advantages Simplified Application Circuit for FPS ™ Features • Optimal Solution for Off-Line SMPS • Integrated Avalanche Rugged SenseFET Snubber Load Circuit • Pulse-by-Pulse Current Limiting • Various Protection Functions (Over Voltage, Over Load, Over FPS™... -
Page 9: Burst Mode Operation
™ Design Guide Green FPS™ Feature – Burst Mode Operation Burst Operation Feedback Waveform Normal Operation BURSTH BURSTL Current Waveform Switching Switching (Refer to schematic in Typical Application Circuit 40W Isolated Flyback Power Supply on page 24) • In standby mode, outputs draw very little to no load current •... -
Page 10: Frequency Modulation For Emi
130kHz • Fixed frequency oscillators generate Electromagnetic Interference (EMI) in a narrow band of the frequency spectrum 131kHz 132kHz • Fairchild’s latest FPS devices modulate its frequency over a 133kHz ±4kHz frequency range 134kHz 135kHz • EMI is thus spread over a wider range of frequencies... -
Page 11: Over Load Protection
™ Design Guide Green FPS™ Feature – Over Load Protection 250uA OSC. Secondary Side Shutdown 2.8R Vfb* Voffset Reset Shutdown Time Constant t2 = Thermal Shutdown (Cfb * (V -3V))/5uA • Consider the load current increasing significantly in this overload scenario. •... -
Page 12: Fps™ Core Products
™ Design Guide ™ Core Products Product/Function Function Part Typical Output Power Output Power Peak Current Drain Voltage Static Drain Source Switching Packages Number Applications (85 – 265Vac) (230Vac) ±15% Limit On Resistance MAX Frequency (Ω) (kHz) FSD200 Charger DIP-7L FSD210 Charger DIP-7L... -
Page 13: Complete Fps Product Offering Sorted By Output Power
™ Design Guide Complete FPS ™ Product Offering Sorted By Output Power Function Part Recommended Typical Output Power Output Power Peak Current Drain Static Drain Source Switching Packages Number Replacement Applications (85-265Vac) (230Vac) ±15% Limit Voltage MAX on Resistance Frequency MAX (Ω) 0 to 10W Output Power Range FSD200... -
Page 14: Typical Applications
™ Design Guide Typical Applications FSD200 FSD210 FSDL312 FSCQ0765RT FSD1000 FSCQ1265RT FDSH321 FSCQ1565RT FSDM311 0–12W Output Power Range FSDM0565R FSDH0265RN FSDM07652RB FSDL0165RN FSDL0365RN FSDM0365RN FSDM0265RN www.fairchildsemi.com/fps... -
Page 15: Examples Of Typical Application Circuits
– Inherent short circuit protection • Frequency modulation reduces EMI reduction circuitry – Low cost, compact solution possible Fairchild Devices Description FSD210M Fairchild Power Switch (0.3A/134kHz) P6KE150A Transient Voltage Suppressor (600W/150V) EGP10D Fast Recovery Diode (1A/200V) BZX84C9 Zener Diode (9V) -
Page 16: Dual Negative Output Non-Isolated Flyback
– More compact, lower cost core • Frequency modulation reduces EMI reduction circuitry – Split 400V input capacitor and input inductor sufficient in most cases Fairchild Devices Description FSD200M Fairchild Power Switch (0.3A/134kHz) P6KE150A Transient Voltage Suppressor (600W/150V) EGP10D Fast Recovery Diode (1A/200V) BZX84C5V1 Zener Diode (5.1V) -
Page 17: W Single Output Isolated Flyback Using Fsd200 With Ka431 Reference
• Schottky diode used in output stage – Cost-effective means of improving efficiency • Integrated soft start function – Prevents power surges during switch-on time Fairchild Devices Description FSD200M Fairchild Power Switch (0.3A/134kHz) KA431 2.5V Reference (2.5V) H11A817A Transistor Optocoupler SB180 Schottky Diode (1A/80V) -
Page 18: Single Output Isolated Flyback Using Fsdm0265R And Zener Diode
– Inherent short circuit protection • Current limit may be lowered using an external resistor – Increased flexibility in choice of range of FPS™ parts Fairchild Devices Description FSDM0265RN Fairchild Power Switch (1.5A/70kHz) BZX84C3V9 Zener Diode (3.9V) H11A817A Transistor Optocoupler SB540... -
Page 19: Multiple Output Isolated Flyback Using Fsd210 With Primary Side Regulation
• Overload protection circuit distinguishes between temporary and permanent overload – Device does not shut down during load surge conditions from drive unit – Inherent short circuit protection Fairchild Devices Description FSD210M Fairchild Power Switch (0.3A/134kHz) BZX84Cxx Zener Diodes (10V, 12V) P6KE200 Transient Voltage Suppressor (600W/200V) SB140... -
Page 20: Buck Converter Using Fsdl0165Rn
– Internal soft start feature helps • Frequency modulation helps to reduce EMI – Cost saving in external filter circuit Fairchild Devices Description FSDL0165RN Fairchild Power Switch (1.2A/50kHz) BZX84C15 Zener Diodes (15V) UF4004 Fast Recovery Diode (1A/400V) BC337-25 General Purpose Transistor... -
Page 21: Multiple Output Isolated Flyback Converter Using Fsdm0265Rn
• Current limit may be lowered using an external resistor – Increased flexibility in choice of range of FPS™ parts Fairchild Devices Description Fairchild Devices Description FSDM0265RN Fairchild Power Switch (1.5A/70kHz) SB180 Schottky Diode (1A/80V) FAN1112D Voltage Regulator (1.2V/1A) SB330 Schottky Diode (3A/30V) FAN1616AS25 Voltage Regulator (2.5A/0.5A) -
Page 22: 180W-200W Ka5Q1265Rf Quasi-Resonant Flyback With Input Power
™ Design Guide Examples of Typical Application Circuits 180W-200W KA5Q1265RF Quasi-resonant Flyback with Input Power Factor Correction Using FAN7527B/FQP13N50C Typical Application – Color Televisions NTC100 D302 C200 EGP30J 470pF L201 1000V 10uH T301 R301 R308 VOGT EF25 PFC 470K 0.25W C305 0.25W C201... -
Page 23: Factor Correction Using Fan7527B/Fqp13N50C
– Hysteretic burst mode for KA5Q1265RF device – FAN7527B PFC controller deactivated at low power Fairchild Devices Description Fairchild Devices Description KA5Q1265RF Fairchild Power Switch (8A/quasi resonant) KA431 2.5V Reference (2.5V) FAN7527B Transition mode PFC controller H11A817A Transistor Optocoupler FQP13N50C... -
Page 24: Isolated Flyback Power Supply
– Better regulation • Overload protection distinguishes between temporary and permanent overload • Internal soft start reduces inrush current and output overshoot on turn on Fairchild Devices Description FSDM07652R Fairchild Power Switch (2.5A/70kHz) H11A817A Optocoupler KA431 2.5V Reference (2.5V) 1N4007... -
Page 25: Single Output 48V Dc/Dc Flyback Converter
3.9K 12V 12 turns The Fairchild Power Switch family is also useful in DC input applications. Here the FS6X1220 has a 200V MOSFET with R DS(on) less than 0.3W. The topology is very similar to the AC input flyback topology. One important difference is the additional L&S pin- which serves two functions. -
Page 26: Secondary Side Synchronous Rectification In A Power Over Ethernet Application
0.1V to 0.15V. This lead is to a 4% point increase in efficiency. An auxiliary winding drives the MOSFET. Also shown in Fairchild’s FOD2741A which combines the optocoupler and reference functionality into one chip. All relevant nodes are accessible: LED drive, reference drive and the reference voltage itself. -
Page 27: Design Tools
™ Design Guide Design Tools AC to DC Designer • Download from website at www.fairchildsemi.com/designcenter/acdc • Allows quick and easy fly-back design process. • Provides a lookup into a database of available devices. • Gives a first-stab design for practical optimization. •... -
Page 28: Ordering Guide
™ Design Guide Ordering Guide www.fairchildsemi.com/fps... - Page 29 ™ Design Guide Notes www.fairchildsemi.com/fps...
- Page 30 Tel: 82-31-231-3100 Fax: 82-31-231-9846 The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks: ACEx™, Across the board. Around the world.™, ActiveArray™, Bottomless™, CoolFET™, CROSSVOLT™, DOME™, EcoSPARK™, E 2 CMOS™, EnSigna™, FACT™, FACT Quiet Series™, FAST ®...
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