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Design LM3630A
SNVS974B – APRIL 2013 – REVISED OCTOBER 2015 LM3630A High-Efficiency Dual-String White LED Driver
1 Features 3 Description The LM3630A is a current-mode boost converter
which supplies the power and controls the current in
up to two strings of 10 LEDs per string. Programming
is done over an I2C-compatible interface. The
maximum LED current is adjustable from 5 mA to
28.5 mA. At any given maximum LED current the
LED brightness is further adjusted with 256
exponential or linear dimming steps. Additionally,
pulsed width modulation (PWM) brightness control
can be enabled allowing for LED current adjustment
by a logic level PWM signal. 1 Drives up to 2 Strings of 10 Series LEDs
Wide 2.3-V to 5.5-V Input Voltage Range
Up to 87% Efficient
8-bit I2C-Compatible Programmable Exponential
or Linear Brightness Control …
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