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LP3952 Dataheets PDF



Part Number LP3952
Manufacturers National Semiconductor
Logo National Semiconductor
Description 6-Channel Color LED Driver
Datasheet LP3952 DatasheetLP3952 Datasheet (PDF)

LP3952 6-Channel Color LED Driver with Audio Synchronization www.DataSheet4U.com July 2007 LP3952 6-Channel Color LED Driver with Audio Synchronization General 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 lig.

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LP3952 6-Channel Color LED Driver with Audio Synchronization www.DataSheet4U.com July 2007 LP3952 6-Channel Color LED Driver with Audio Synchronization General 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 micro SMDxt package together with minimum number of external components is a best fit for handheld devices. Features ■ 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 VOUTand fSW I2C compatible interface Possibility for external PWM dimming control Small package – 36-bump micro SMDxt, 3.0 x 3.0 x 0.65 mm Applications ■ Cellular Phones ■ PDAs, MP3 players Typical Applications 30023871 © 2007 National Semiconductor Corporation 300238 www.national.com LP3952 Connection Diagrams and Package Mark Information CONNECTION DIAGRAMS www.DataSheet4U.com 36-bump Micro SMDxt Package, 3.0 x 3.0 x 0.65 mm, 0.5 mm pitch NS Package Number RLA36AAA 30023872 30023873 PACKAGE MARK 30023874 Ordering Information Order Number LP3952RL LP3952RLX Package Marking D62B D62B Supplied As TNR 250 TNR 1000 Spec/Flow NoPb NoPb www.national.com 2 LP3952 Pin Descriptions Pin # 6F 6E 6D 6C 6B 6A 5F 5E 5D 5C 5B 5A 4F 4E 4D 4C 4B 4A 3F 3E 3D 3C 3B 3A 2F 2E 2D 2C 2B 2A 1F 1E 1D 1C 1B 1A Name SW FB GND R1 G1 B1 GND_SW GND VDDIO SDA IRGB GND_RGB GND GND PWM ADDR_SEL NRST R2 GND GND VDD1 GND SCL G2 GND GND ASE IRT GNDT B2 GND GND GNDA VREF VDDA VDD2 Type Output Input Ground Output Output Output Ground Ground Power Logic Input/Output Input Ground Ground Ground Logic Input Logic Input Logic Input Output Ground Ground Power Ground Logic Input Output Ground Ground Input Input Ground Output Ground Ground Ground Output Power Power Boost Converter Power Switch Boost Converter Feedback Ground Red LED 1 Output Green LED 1 Output Blue LED 1 Output Power Switch Ground Ground Description www.DataSheet4U.com Supply Voltage for Logic Input/Output Buffers and Drivers Serial Data In/Out (I2C) Bias Current Set Resistor for RGB Drivers Ground for RGB Currents Ground Ground External PWM Control for LEDs. Connect to GND if not used. Address Select (I2C) Reset Pin Red LED 2 Output Ground Ground Supply Voltage Ground Clock (I2C) Green LED 2 Output Ground Ground Audio Synchronization Input Oscillator Frequency Resistor Ground Blue LED 2 Output Ground Ground Ground for Analog Circuitry Reference Voltage Internal LDO Output Supply Voltage 3 www.national.com LP3952 Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V (SW, FB, R1-2, G1-2, B1-2) (Notes 3, 4) VDD1, VDD2, VDDIO, VDDA Voltage on ASE, IRT, IRGB, VREF Voltage on Logic Pins V(all other pins): Voltage to GND I (VREF) I(R1, G1, B1, R2, G2, B2) Continuous Power Dissipation (Note 5) Junction Temperature (TJ-MAX) Storage Temperature Range Maximum Lead Temperature (Soldering) (Note 6) ESD Rating (Note 7) Human Body Model: -0.3V to +7.2V -0.3V to +6.0V -0.3V to VDD1+0.3V with 6.0V max -0.3V to VDDIO +0.3V with 6.0V max -0.3V to 6.0V 10 μA 100 mA Internally Limited 150°C -65°C to +150°C 260°C Operating Ratings (Notes 1, 2) www.DataSheet4U.com V (SW, FB, R1-2, G1-2, B1-2) VDD1,2 with external LDO VDD1,2 with internal LDO VDDA VDDIO Voltage on ASE Recommended Load Current Junction Temperature (TJ) Range Ambient Temperature (TA) Range (Note 8) 0 to 6.0V 2.7 to 5.5V 3.0 to 5.5V 2.7 to 2.9V 1.65V to VDD1 0.1V to VDDA –0.1V 0 to 300 mA -30°C to +125°C -30°C to +85°C Thermal Properties Junction-to-Ambient Thermal Resistance(θJA), RLA36AAA Package (Note 9) 60°C/W 2 kV www.national.com 4 LP3952 www.DataSheet4U.com (Notes 2, 10) Limits in standard typeface are for TJ = 25°C. Limits in boldface type apply over the operating ambient temperature ra.


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