LP3954 - Advanced Lighting Management Unit

	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

click for larger image

Parametric Table expand

Parametric Table collapse

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

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

View Using Catalog

Typical Performance

click for larger image

Additional Resources

Application Notes (see below)

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LP3954 Advanced Lighting Management Unit	6185 Kbytes	23-Jul-07	View Online Download

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

Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LP3954RL

MICRO SMDXT

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$2.10

reel
of
250

XYTT
I D63B

6 weeks

N/A

LP3954RLX

MICRO SMDXT

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$2.10

reel
of
1000

XYTT
I D63B

6 weeks

N/A

LP3954TL

MICRO SMD

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$2.10

reel
of
250

XYTT
I D49B

6 weeks

N/A

LP3954TLX

MICRO SMD

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$2.10

reel
of
1000

XYTT
I D49B

6 weeks

N/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

Title	Size in Kbytes	Date
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

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

[Information as of 20-Nov-2008]