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SN6505B-Q1: Isolated power supply Vin =5V to 12V

mudit mittal
Prodigy 100 points

Part Number: SN6505B-Q1
Other Parts Discussed in Thread: SN6505B

Hii

We have a requiremnt of desiging isolated power supply . Following are the specification:

Vin :5V

Vout:12V

Iout : 350mA(max)

for desging we have selected the SN6505B push pull driver . We are facing isues in selecting transformer . as par our calculation then turns ration will be greater than 3.05. following are the option from WE-PPTI Push-Pull Transformers

1.750320340

2.750316818

3. 750316819

Pls verfiy are the selection are right

Regards

Mudit Mittal

 

  • 0
    TI__Intellectual 2900 points

    Hi Mudit,

    I'll check each transformer and confirm by tomorrow

    Regards,

    Prateek

  • 0 in reply to Prateek Verma
    TI__Intellectual 2900 points

    Hi Mudit,

    Please find below input:

    According to the datasheet, SN6505B requires transformer with Vt product > 7.6 V·μs. see snapshot of datasheet 

    Part # Turns Ratio (Ns:Np) Vt Product Secondary current (Typical) Suitability
    750320340 1 : 3.5 16 V·μs 250 mA Warning️ Current rating tight
    750316818 1: 3.5 9 V·μs 380 mA White check mark Best match
    750316819 1 : 2.88 9 V·μs 460 mA Warning Turns ratio < 3.05

    750316818 is most suitable for your application.

    Let me know if you need further help

    Thanks and regards,

    Prateek