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UCC28910: ultra wide input buck converter, output 5V, 1A.

Part Number: UCC28910
Other Parts Discussed in Thread: UCC28911


I don't have much experience in building power supplies but I am building a digital input card and I came to this power supply problem.

I want to build ultra input range power supply based on buck converter with the following specifications:

Input voltage: 12 to 160 VDC or more.

Output: 3.3V or 5V or 12VDC.

Output current: 500 mA or better 1A.


I searched on TI web site, and I found some application notes using "UCC28910" to build buck converter power supplies with inputs 85 to 265 V and with limited output current of only 100 mA.  Although I could not find the maximum current supported by the chip but drain current peak is 700 mA so the chip must support much more.

I think the application note limited the input current to 100 mA due to the heat dissipation consideration but if we short the I peak pin to ground then how much the output current could reach?

Also, I understand that non-isolated buck converter support wide input range as long as the input voltage is higher enough than the output voltage. Accordingly, the input of the circuit in the application note can accept 24V if we changed the output voltage settings to 12V for example. Is this correct?

How the above modifications may affect the circuit noise and EMI?

So, please guide us which chip is better to use for our design. And where we can find useful application notes with similar requirements.

Thanks in advance.