3 ms·
Sure. You could use an SOT23 or a QFN like this: http://www.digikey.com/product-detail/en/texas-instruments/TPS61090RSAR/296-15259-2-ND/566911 http://www.digik
by hwillis 10y ago
Sure. You could use an SOT23 or a QFN like this: http://www.digikey.com/product-detail/en/texas-instruments/TPS61090RSAR/296-15259-2-ND/566911 http://www.digikey.com/product-detail/en/texas-instruments/T...
That's 4 mm x 4 mm (more with passives, but not too bad), and hits a solid 95% efficiency at the normal load of an iphone, and is above 90% all peak loads. Heat dissipation will be fine, all parts cost about $1.20. Low EMI.
However, its still a dozen new components. It's a ~10% tradeoff somewhere and while that may be totally worth it, its not simple. Phones do not have square millimeters to spare.
- Arizhel 10y ago>Phones do not have square millimeters to spare. Actually, they do, when you're replacing the battery with one with 3 times the energy density. Use some of the saved space for your DC-DC converter.
- hwillis 10y agoIts like... adding a turbocharger to a car. Yes, it is possible. There are even kits, after a fashion. But it is still not simple. Also, its not even at the stage of a hypothetical question yet. This battery would last about two weeks in an iphone under these load conditions. The only reason it "looks" possible is if you're considering a battery that is not this one.