Tiny universal LED driver can gradate, blink or turn on nine individual LEDs with minimal external control
Marty Merchant
Abstract
A tiny universal LED driver that can gradate, blink or turn on nine individual LEDs with minimal external control is described.
Keywords
LED driver
charge pump
cell phone
LTC3219
Introduction
LEDs are the lighting workhorse of cell phones, MP3 players and diagnostic lights in telecom systems. Their uses are many, from utilitarian backlighting to eye-catching aesthetic effects such as slowly pulsing multicolor indicators. As device designers strive to differentiate their products on the shelf, the number and complexity of lighting effects grows. It would seem that each new effect requires significant ...
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