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Zaim
Level 1
Level 1
5 sign-ins First reply posted First like given

Dear infineon team

 

I want to design an SMPS circuit with the following specifications:

 

* Input can be either 33-265 VAC or 48-375 VDC (ultra-wide input)

 

* Multiple DC outputs

 

1.output : 24V with 0.7 A

 

2.output : +10V with 0.8 A

 

1.output : -10V with 0.8 A

 

1.output : 5V with 0.5 A

 

1.output : 3.3V with 1 A

 

* Output power (40-100W)

 

.

 

How to design an power supply isolated circuit with the specifications above ?

 

sincerely,

 

Zaim.

 

 

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1 Solution
sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

Hi, 

you can use this block diagram for the reference.  

for power below 60W PFC is not necessary but above 60W PFC is required as per the standard compliance.   wide input one op.png

you can check this link for the design of Flyback for 24V output. 

https://www.infineon.com/dgdl/Infineon-EngineeringReport_EvaluationBoard_EVAL_5QR2270AZ_33W1-AN-v01_...

for LDO1 - you can use TLS850F0TA V50

for LDO2 - you can use TLE4284D V33

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10 Replies
sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

Hi, 

thanks for posting the query on infineon community

thanks!

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sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

Hi, 

you can use this block diagram for the reference.  

for power below 60W PFC is not necessary but above 60W PFC is required as per the standard compliance.   wide input one op.png

you can check this link for the design of Flyback for 24V output. 

https://www.infineon.com/dgdl/Infineon-EngineeringReport_EvaluationBoard_EVAL_5QR2270AZ_33W1-AN-v01_...

for LDO1 - you can use TLS850F0TA V50

for LDO2 - you can use TLE4284D V33

Zaim
Level 1
Level 1
5 sign-ins First reply posted First like given

Thank you very much for your answer,  and forgive me because of late response.

My question is what is the range of ac input of this circuit?

How can I take 5 output from the transformer without using regulatours?

Sincerely, 

Zaim

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sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

Wide AC voltage range

to take 5 output from transformer you need multiple output winding transformer , for this case you need 5 output winding and 1 input winding. 

Zaim
Level 1
Level 1
5 sign-ins First reply posted First like given

Thank you very much 

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sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

due to no further questions we are closing this thread

thanks!

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Zaim
Level 1
Level 1
5 sign-ins First reply posted First like given

Also is there any way to simulate this circuit on any simulation program like LTspice or Tina ...etc ?

 

If yes how can I make the flyback transformer because I couldn't find any spice model for it and for the optocoupler,  if you have the simulation of them for Tina please share them with us.

Sincerely, 

Zaim

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sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

hi 

you can simulate it on ltspice 

for flyback transformer simulation you can use two inductor coupled together using the statement K L1 L2 1

and keep the inductor dots on the opposite side and for optocoupler go to optos in ltspice component selection

thanks!

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Zaim
Level 1
Level 1
5 sign-ins First reply posted First like given

Thank you for your fast response, 

 

I already started to do the circiut with Tina program but I couldn't find any optocoupler to simulate it , and I think your chips also are avaliable with spice model for Tina , is your spice model for PWM avaliable for Ltspice also ?

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sushank
Moderator
Moderator
Moderator
25 solutions authored 100 sign-ins 50 replies posted

spice model works for both TINA and ltspice,      

 

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