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best power supply topology?

 Post time:  2009-05-15
 

Author:sitha_m

Points:  10

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Hi everyine!
Based on your experience, what is the most appropriate power supply toplogy for low cost applications?
Thanks a lot!
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Reply:best power supply topology? Post time:  2009-05-18
 

Author:vishal.gupta0

Points:  5

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Hi, Assuming you are talking about dc-dc power conversion: 1. Typically Linear Regulators are the cheapest. But efficiency is poor. 2. Amongst SMPS topologies: a. If only step-down is required, go for Buck as plenty of ICs with integrated FETs are available. b. If only step-up is required, Boost is the way to go. c. If isolation and/or step-up/down is required, Flyback is acknowledged to be the lowest part count topology. -vishal
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Reply:best power supply topology? Post time:  2009-05-20
 

Author:mane

Points:  5

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Considering the green tendecy, most of the of line SMPS will need a PFC at the front end. This will force the use of a balanced resonant swither for best efficience. We need integration of components in less chips. Manoel Pereira
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Reply:best power supply topology? Post time:  2009-06-03
 

Author:CK_Mind

Points:  5

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The best topology to be followed depends on the input voltage, output voltage and output current.
Based on the above parameters we can suggest a topology optimised for cost
 
Regards
CK
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Reply:best power supply topology? Post time:  2009-06-05
 

Author:null

Points:  5

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half bridge can also considered for higher efficiency and a dedicated yet cost effective PWM ic TL494
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Reply:best power supply topology? Post time:  2009-06-16
 

Author:smartpower

Points:  5

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For off line low power below 60w(L6566B like), Fly back is good topolgy. For off line
70--400w Boost PFC+Resonant Half Bridge(L6562A\3+L6599A) will give best effeciency. For low voltage dc-dc L598x or L497X Family are good for buck or Buck boost. Similar devices are available from STMicro,Onsemi,Fairchild,Lineartech and TI. STMicro and Fairchild has complete solutuins with ref designs.
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Reply:best power supply topology? Post time:  2009-06-18
 

Author:Ram Anant

Points:  70

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One can suggest the most appropriate topology once we know the following: 1. Vin 2. Vout 3. Iout 4. isolation required or not 5. Application (Load) Ram
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Reply:best power supply topology? Post time:  2009-07-07
 

Author:Ram Anant

Points:  70

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Discontinuous flybacks are best suited below 50W, CCM flybacks upto 100W, Forward converters single and two transistor are good up to 500W and then over 500W, it becomes the double ended converter play. These are push pull, half bridge and full brigde with some topological variations for higher power applications. I have mentioned converters here that help you get the needed isolation between input and output. If you have any furher interest in knowing more specifics about any type, please ask.
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Reply: best power supply topology? Post time:  2010-01-18
 

Author:Joller

Points:  60

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Specifying the Best PFC Topology for Your Power Supply by Tom Brooks Director of Engineering, Power Systems Group Taiyo Yuden, USA, Inc.
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