TIDA-00550: Changing input voltage range and power

Caleb Swieson

Part Number: TIDA-00550
Other Parts Discussed in Thread: LM5160, LM5017, TIDA-00661

I have an application that will be very close to TIDA-00550, except for two changes:

Input voltage range is 12-36VDC
I need to supply more power than is available through the transformer.

I was thinking of using the LM5160 instead of the LM5017, and use the DC-DC converter from TIDA-00661. Are there any issues with redesigning this to accept 12-36VDC?

Thanks,

Caleb

over 7 years ago

0 Lars Lotzenburger over 7 years ago

TI__Intellectual 1270 points

Hi,

the TIDA-00661 is for nominal input voltages 19V-30V. If the system is supposed to start from 12V we recommend to decrease Vpri from 8V to 6V and to adapt the transformer accordingly. However, if the 12V happens occasionally, e.g. input voltage drops) TIDA-00661 can be used as-is.

Hope this help!

Thanks,
Lars

0 Caleb Swieson over 7 years ago in reply to Lars Lotzenburger

Prodigy 110 points

Thank you Lars,
We are planning to have the system start (and run) from 12V, so I will look into decreasing Vpri and adapting the transformer.

Caleb

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TIDA-00550: Changing input voltage range and power