inn4777c-h191 - Please help me.

Posted by: Alex0120012 on 11/28/2024

I have been creating chargers for many years.
I use TOP250 microcircuit. The power of my chargers is up to 210 watts.
I use my unique charging method (algorithm) for lead-acid batteries.
Therefore, I need to very precisely control the output voltage of the charger. About 150-200 times per second, the microprocessor decides to change the control voltage (via an optocoupler).
Now I want to switch to using
https://www.power.com/products/innoswitch/innoswitch4-qr/inn4777c-h191
I cannot use a "clamp zero" microcircuit, it will greatly increase costs.
I cannot use "digital control", because it can be intercepted and I will lose my know-how. So I need only "analog" control, and I think that this one will suit me:
https://www.power.com/products/innoswitch/innoswitch4-qr/inn4777c-h191
but I can't choose this particular chip in your "designer".
Please help me.

Comments

Hello Alex,

The InnoSwitch4-QR currently only has a PI XLS designer and not the full PI Expert designer.

I will link a sample PI XLS designer using your chosen device below. It is enough to get you started with a transformer design.

PI XLS: https://piexpertonline.power.com/piexpert/design/select?share=852098bd9865406d4f293ef4f38cf3de763b9700372e0b3ade6699c60d67c2f8

I hope this helps.

thanks for your help with the calculations!
I have a couple more questions:
1) what is the difference in application of the INN4777C-H191-TL
and INN4777C-H192-TL models? I did not quite understand what I need to provide for in my charger development.

2) INN4777C-H191-TL - is not available for sale anywhere.
They tell me 18 weeks... the figure of 12-18 weeks does not change during the year.
Where can I buy INN4777C-H191-TL in Europe or the USA?
Why are you advertising something that cannot be bought now?

Hello Alex,

For the differences between H191 and H192, you can find a table listing them all on page 31 of the datasheet.

For the availability, it will be better to reach out to our sales team instead. They will be able to answer your question on the availability of our device. You can contact them through our sales inquiry form here: Sales Inquiry | Power Integrations

I hope this answers your questions.

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Thank you for your reply!
I understand the difference between the devices better.

As for buying INN4777C-H191 - I know all these links and all these distributors.
None of the distributors sell INN4777C-H191.
I checked them all.
I wrote a letter to your sales office - I have not received an answer yet.

I am a small independent electronics developer, I cannot buy 2000 units at once. And I cannot wait 18 weeks.

I really like your INN4777C-H191 products, but if I cannot buy them, and cannot buy them in small batches constantly, then I will choose from the Chinese converter options.