Main/camera cell phone LED driver

March 2006
Portable Design;Mar2006, Vol. 12 Issue 3, p32
This article discusses the light emitting diodes in mobile phones. The LTC3210 is a synthesized 800-kHz 1x/1.5x/2x multimode charge for pump intended for the drivers of the main and camera LEDs in cell phones. Five LED current sources are supplied with a current value of 500-mA of the total output current for a 4x25-mA LED main display and a high current value of 400-mA LED display. Its voltage input ranges from 2.9 to 4.5 volts and is used for Li-Ion cellular applications. Two resistors are set as maximum currents for the display set.


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