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LP3931ISQX
3 to 6 V, dual RGB LED driver with high current boost DC-DC
LP3931
Dual RGB LED Driver with High Current Boost DC-DC
Converter
General DescriptionThe LP3931isa RGB LED driver with high current boost
DC-DC converter designedfor portable wireless applica-
tions.It contains2 setsof RGB LED drivers that are PWM-
driven with programmable color, intensity and blinking pat-
terns. They additionally featurea FLASH functionto support
picture taking with camera-enabled cellular phones. efficient magnetic boost DC/DC converter provides the
required bias, operating froma single Li-Ion battery. The
DC/DC converter output voltageis user programmablefor
adaptingto different LED types andfor efficiency optimiza-
tion.
All functions are software controllable throughthe SPI inter-
face and internal registers.
Features High Efficiency Programmable 300 mA Magnetic Boost
DC-DC converter2 separately controlled PWM RGB LED drivers with
programmable color, brightness, turn on/off slopes and
blinking patterns FLASH function withupto6 outputs, eachupto
120 mA Functions software controlled through SPI interface Additional LED on/off and dimming hardware control Programmable low current Standby mode Low voltage digital interface downto 1.8V Space efficient 24-pin LLP package
Applications GSM Cellular Phones WCDMA, CDMA and CDMA2000 Phones PHS and PDC Cellular Phone
Typical ApplicationAugust 2004
LP3931
Dual
RGB
LED
Driver
with
High
Current
Boost
DC-DC
Converter
