[sdiy] Phantom power generation

Steve Lenham steve at bendentech.co.uk
Wed Jun 22 10:08:38 CEST 2016


Good enough for on-air use by national broadcasters :-)

We used a second stage of LC filtering on the output of the converter 
(and decent decoupling throughout), but nothing more.

Cheers,

Steve L.

On 21/06/2016 21:00, Tim Ressel wrote:
> I looked at that very chip thanks to web bench. Was the output clean
> enough? The Mic pre is going to have mondo gain.
>
> --TimR
>
>
> On 6/21/2016 2:24 AM, Steve Lenham wrote:
>> On 21/06/2016 07:59, Tim Ressel wrote:
>>> Hi,
>>>
>>> I need to make phantom power from 12 volts. Anybody got a kewl circuit?
>>>
>>> Thanks!
>>>
>>>
>>> --Tim Ressel
>>
>> Take a look at the TI LM5002 high-voltage boost converter chip. I've
>> used it for exactly that purpose in a production design. The datasheet
>> has almost the circuit you need on p15; you just need to tweak it
>> slightly for the lower input voltage, and the Webench tool on TI's
>> website will probably do that for you.
>>
>> HTH,
>>
>> Steve L.
>> Benden Sound Technology
>>
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>




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