Apple iPhone charger teardown: quality in a tiny expensive package (2012)
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HN comment orderIt's a surprise to see my blog post from nine years ago (!) at the top of Hacker News. Anyone have questions about chargers?
Power engineer here. Something that is not apparent is that many small power supplies are limited in power handling not by the components, but by maximum safe touch temperatures for meeting regulations (probably around the 10W level). Therefore making a more efficient power supply means that you can package it smaller since the heat needs lower surface area to dissipate safely. Right now, gallium nitride MOSFETs are gaining popularity allowing for higher efficiencies in power conversion, and some wildly high…
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- Breakout years
- 2
- Total points
- 487
- Total comments
- 344
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2014-10-05 | Apple iPhone charger teardown: quality in a tiny expensive package (2012) | vdfs | 1 | 0 |
| 2020-05-03 | Apple iPhone charger teardown (2012)First breakout | ofrzeta | 107 | 71 |
| 2021-08-03 | Apple iPhone charger teardown: quality in a tiny expensive package (2012)Best thread · Latest 20+ point return | retskrad | 379 | 273 |