On Wed, 14 Nov 2007, Jim Jackson wrote:
>
> On Wed, 14 Nov 2007, I dont have one wrote:
>
>> Hello,
>>
>> I have a ts7200 that I am looking to do some battery powered
>> applications with and need to do some testing. I was wondering if
>> there is a tested maximum voltage for powering the boards, the manual
>> simply says "Voltages over 6vdc may cause damage" and that is too
>> vague for me. With my current inventory, I can either have 4.2vdc
>> which is too low, or 6.4vdc which I fear may be too high and do not
>> want to risk damage, if necessary I can apply a voltage regulator, but
>> that is a bit of wasted energy. Thank you for any help.
>>
>
> I used an off the shelf switch mode regulator (a sort of 7805 substitute)
> to give me 5v from any 8v-18v source. Maybe you could find something
> similar, but in boost mode, to run off the 4.2v source you've got.
The max710 has an (off-line) booster to 6.5v followed by a low dropout
linear regulator. I don't think it would be terribly happy supplying the
400mA or so that the ts boards use, but it's an interesting idea. They
claim better efficency than cuk and sepic topologies for some situations.
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