LP3954 - Advanced Lighting Management Unit from the PowerWise® Family
Datasheet Packaging Samples & Pricing Application Notes Knowledge Base

Features
• Audio synchronization for color/RGB LEDs
• Command based PWM controlled RGB LED drivers
• High current driver for flash LED with built-in timing.
• 4+2 or 6 low voltage constant current white LED drivers with programmable 8-bit adjustment (0…25mA/LED)
• High efficiency Boost DC-DC converter
• SPI / I 2C compatible interface
• Possibility for external PWM dimming control
• Possibility for clock synchronization for RGB timing
• Ambient light and temperature sensing possibility
• Small package – micro SMD or micro SMDxt, 3.0 x 3.0 x 0.6mm

General Description

LP3954 is an advanced lighting management unit for handheld devices. More...


Applications

• Cellular Phones
• PDAs, MP3 players
  Typical Application
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ParametersValues
Regulated LEDs 13
LED Configuration Parallel
Current Matching 0.20%
Boost Type Inductive
Switching Frequency 2000 kHz
Switching Type PWM
Total LED Current 300 mA
Efficiency (peak) 90 %
PowerWise Technology Audio Adaptive RGB LED Driver
Boost Voltage Regulated
Supply Current 1 mA
Input Min Voltage 3 Volt
Input Max Voltage 7.2 Volt
OutputMax Voltage 5.3 Volt
PWM BrightCtrl Yes
Analog-V BrightCtrl Yes
Ambient Light Compensation Yes
RGB-LED Yes
Temperature Min -30 deg C
Temperature Max 85 deg C
RegType Lighting Management Unit
PowerWise Yes


Typical Performance

click for larger image


  Additional Resources
Application Notes


Block Diagram

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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP3954 Advanced Lighting Management Unit 6185
Kbytes		 23-Jul-07 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LP3954RLMICRO SMDXT36NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$2.10reel
of
250		XYTT
I D63B
6 weeksN/A
LP3954RLXMICRO SMDXT36NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$2.10reel
of
1000		XYTT
I D63B
6 weeksN/A
LP3954TLMICRO SMD36NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$2.10reel
of
250		XYTT
I D49B
8 weeksN/A
LP3954TLXMICRO SMD36NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$2.10reel
of
1000		XYTT
I D49B
8 weeksN/A

General Description

LP3954 is an advanced lighting management unit for handheld devices. It drives any phone lights including display backlights, RGB, keypad and camera flash LEDs. The boost DC-DC converter drives high current loads with high efficiency. White LED backlight drivers are high efficiency low voltage structures with excellent matching and automatic fade in/ fade out function. The new stand-alone command based RGB controller is feature rich and easy to configure. Built-in audio synchronization feature allows user to synchronize the color LEDs to audio input. Integrated high current driver can drive camera flash LED or motor/vibra. Internal ADC can be used for ambient light or temperature sensing. The flexible SPI/I 2C interface allows easy control of LP3954. Small micro SMD package together with minimum number of external components is a best fit for handheld devices.

More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-460: Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors 306
Kbytes		 20-Sep-02 Download
AN-460 (Japanese): Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors
 322 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 8-Nov-2009]