Fairchild FPS Series Design Manual Download Page 4 | Manualshive

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Summary of Contents for FPS Series

Page 1: ...www fairchildsemi com Building Block Solutions for Multi Market Applications FPS Design Guide Fairchild Semiconductor FPS Fairchild s Power Switch for Switch Mode Power Supply Design Guide...

Page 2: ......

Page 3: ...solated Flyback 16 2 5W Single Output Isolated Flyback Using FSD200 with KA431 Reference 17 10W Single Output Isolated Flyback Using FSDM0265R and Zener Diode 18 10W Multiple Output Isolated Flyback U...

Page 4: ......

Page 5: ...d excessive voltage of controlled DC output These necessary protection features are combined with advanced control features such as burst mode operation for low standby power a precision oscillator wi...

Page 6: ...llator Additional functions Startup circuit with soft start Frequency modulation Burst operation Protection function Over load protection Over voltage protection Over current protection Pulse by pulse...

Page 7: ...t mode boards in white goods for example FSDL312 Built in startup Soft start Medium Power FSD1000 Auxiliary supplies PC main supply and PC auxiliary supply FPS with main power PWM integrated Burst mod...

Page 8: ...quency Synchronization Quasi Resonant Snubber Circuit Load Feedback Circuit Control IC FPS Advantages Low Standby Consumption with Burst Mode Operation Fully Avalanche Rugged 650V and 800V SenseFETs I...

Page 9: ...eedback voltage to decrease When the feedback voltage goes below VBURSTL threshold switching stops in the FPS device saving considerable power Depending on load current the output voltages will eventu...

Page 10: ...devices modulate its frequency over a 4kHz frequency range EMI is thus spread over a wider range of frequencies Allows simple EMI filters to be employed for meeting world wide EMI requirements Refer...

Page 11: ...en feedback voltage continues to rise At 3V the feedback voltage is pulled up with a small internal 5 A current allowing for adjusting the delay as shown above When the feedback voltage crosses the ov...

Page 12: ...art No No No FSD210 Internal Soft Start Yes Yes Needed Voltage Auto Restart Auto Restart No No Yes FSDM311 Internal Soft Start No Yes Needed Voltage Auto Restart Auto Restart No Auto Restart Yes FSD10...

Page 13: ...5RN DVDP STB VCR 24 0 28 0 2 2 650 4 5 50kHz DIP 8L FSDM0365RN DVDP STB VCR 24 0 28 0 2 2 650 4 5 67kHz DIP 8L KA5H0365R DVDP STB VCR 32 0 40 0 2 2 650 4 5 100kHz TO 220F 4L KA5H0380R DVDP STB VCR 32...

Page 14: ...ns 80 250W Output Power Range 50 100W Output Power Range 10 50W Output Power Range 0 12W Output Power Range FSCQ0765RT FSCQ1265RT FSCQ1565RT FSD200 FSD210 FSDL312 FSD1000 FDSH321 FSDM311 FSDM0565R FSD...

Page 15: ...y from the high voltage bus For output voltages of 12V and over the device may be powered directly from the output winding A low cost Zener diode circuit provides the regulation reference Less than 10...

Page 16: ...flyback is used to generate voltages which are negative with respect to the neutral power line This is used in applications where triacs are driven such as in household appliances A Zener diode a bipo...

Page 17: ...put accuracy is improved using the KA431 voltage reference The values R201 R203 C206 R204 and C104 set the closed loop control parameters and performance Using a Schottky diode is a cost effective met...

Page 18: ...feedback circuit using a Zener diode R104 is used to reduce the current limit Higher power parts in the green FPS family have a higher current limit and a lower RDS on than the lower power parts Using...

Page 19: ...4kHz BZX84Cxx Zener Diodes 10V 12V P6KE200 Transient Voltage Suppressor 600W 200V SB140 Schottky Diode 1A 40V 1N4935 Fast Recovery Diode 1A 200V 1N4937 Fast Recovery Diode 1A 600V UF4007 Fast Recovery...

Page 20: ...o reduce the EMI caused by the switching Buck converter using FSDL0165 has high efficiency and low standby power Ideal replacement for 50Hz transformer solutions FSDL0165RN has a fully avalanche rated...

Page 21: ...g the size of the FPS device and the transformer The FSDM0265RN uses current mode control which provides excellent response to line and load transient conditions The flexible overload protection can d...

Page 22: ...01 1000uF 50V L221 10uH 5A BEAD101 FERRITE BEAD BD100 R118 68K 0 5W R305 22K 0 6W D241 FYPF0545 T301 VOGT EF25 PFC D105 1N4937 D302 EGP30J C241 1000uF 50V VR301 10K D211 EGP20D R307 0 3R 0 6W R110 S10...

Page 23: ...ich is typically supplied by a microcontroller is Low the current increases through the optocoupler the feedback voltage goes to ground and the device enters burst mode In this case the output voltage...

Page 24: ...ctance value is used to ensure that the associated leakage inductance is also kept low in this application remembering that snubber losses are proportional to the leakage inductance and to the square...

Page 25: ...is the additional L S pin which serves two functions First if the voltage drops below 2 55V the device stops switching If the voltage drops below 1 8V the device goes into a shutdown mode which consu...

Page 26: ...d 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...

Page 27: ...k design process Provides a lookup into a database of available devices Gives a first stab design for practical optimization Can be used with controllers other than FPS Application Notes and Demo Boar...

Page 28: ...28 www fairchildsemi com fps FPS Design Guide Ordering Guide...

Page 29: ...29 www fairchildsemi com fps FPS Design Guide Notes...

Page 30: ...n Office 82 3 Dodang Dong Wonmi Ku Bucheon Gyounggi do 420 711 Korea Tel 82 32 680 1000 Fax 82 32 680 1949 Fairchild Korea Semiconductor Ltd Suwon Office Saemaeul hoi Building 1122 12 Ingye Dong Palda...

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