LP3952 Datasheet, PDF (1/46 Pages) National Semiconductor (TI) – 6-Channel Color LED Driver with Audio Synchronization

LP3952
www.ti.com
SNVS518A – JULY 2007 – REVISED MARCH 2013
LP3952 6-Channel Color LED Driver with Audio Synchronization
Check for Samples: LP3952
FEATURES
1
•2 Constant current and PWM controlled color
LED drivers
• Maximum current 40mA / output in constant
current mode, supports also switch mode
control with 50 mA maximum current / output
• Complete audio synchronization for color/RGB
LEDs with amplitude, frequency and speed
optimization
• Command based lighting pattern generator for
RGB LEDs
• Programmable ON/OFF blinking sequences for
RGB1 outputs
• High efficiency Boost DC-DC converter with
programmable V_OUTand f_SW
• I²C compatible interface
• Possibility for external PWM dimming control
• Small package – 36-bump DSBGA, 3.0 x 3.0 x
0.65 mm
APPLICATIONS
• Cellular Phones
• PDAs, MP3 players
DESCRIPTION
LP3952 is a color LED driver for battery powered
handheld devices. It drives any color LEDs including
RGB LEDs, indicator LEDs and keypad backlight
LEDs. The boost DC-DC converter drives high
current loads with high efficiency. The stand-alone
command based RGB controller is feature rich and
easy to configure. Different lighting patterns and
blinking sequences can be programmed to driver
registers. Built-in audio synchronization feature allows
user to synchronize the color LEDs to audio signal.
LED lighting can be controlled either by audio signal
amplitude or frequency. There are many controls
available for audio synchronization to get desired
lighting effect, including gain, speed, and different
filter settings. The flexible I²C interface allows easy
control of LP3952. LED outputs can be also
controlled with external PWM signal. Small DSBGA
package together with minimum number of external
components is a best fit for handheld devices.
Typical Application
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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