Need constant current for steady LED brightness, which the TL431 can certainly d... | Hacker News

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m-ee on Jan 8, 2019 | parent | context | favorite | on: Anker PowerPort PD 1 USB-C Wall Charger Teardown

Need constant current for steady LED brightness, which the TL431 can certainly do. Maybe they just wanted to use a chip they were already sourcing in large quantities.

SlowRobotAhead on Jan 8, 2019 [–]

Constant current for a single blue LED is a little nuts to me, but you’re probably right and it made financial sense somehow.

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