Product details


Channels (#) 3 LED current per channel (mA) 25.5 LED configuration Parallel Program memory Yes Programmable ramp control Yes Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Iout (Max) (A) 0.0765 Features Analog/PWM Mixed Dimming, Constant Current, Current Control, I2C Control, Power Save Mode, Programmable Lighting Engines Iq (Typ) (mA) 1.5 Shutdown current (Typ) (uA) 0.2 Peak efficiency (%) 95 Operating temperature range (C) -30 to 85 open-in-new Find other RGB LED drivers

Package | Pins | Size

DSBGA (YFQ) 20 0 mm² 2.103 x 1.743 WQFN (NJA) 24 20 mm² 5 x 4 open-in-new Find other RGB LED drivers


  • Adaptive Charge Pump With 1× and 1.5× Gain Provides Up to 95% LED Drive Efficiency
  • Charge Pump with Soft Start and Overcurrent, Short-Circuit Protection
  • Low Input Ripple and EMI
  • Very Small Solution Size, No Inductor or Resistors Required
  • 200-nA Typical Shutdown Current
  • Automatic Power Save Mode
  • I2C-Compatible Interface
  • Independently Programmable Constant Current Outputs with 8-Bit Current Setting and 8-Bit PWM Control
  • Typical LED Output Saturation Voltage 50 mV and Current Matching 1%
  • Three Program Execution Engines with Flexible Instruction Set
  • Autonomous Operation Without External Control
  • Large SRAM Program Memory
  • Two General Purpose Digital Outputs
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The LP5521 is a three-channel LED driver designed to produce variety of lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, LP5521 can operate autonomously without processor control allowing power savings.

The device maintains excellent efficiency over a wide operating range by automatically selecting proper charge pump gain based on LED forward voltage requirements and is able to automatically enter power-save mode, when LED outputs are not active and thus lowering current consumption.

Three independent LED channels have accurate programmable current sources and PWM control. Each channel has program memory for creating desired lighting sequences with PWM control.

The LP5521 has a flexible digital interface. Trigger I/O and a 32-kHz clock input allow synchronization between multiple devices. Interrupt output can be used to notify processor, when LED sequence has ended. The LP5521 has four pin selectable I2C-compatible addresses. This allows connecting up to four parallel devices in one I2C-compatible bus. GPO and INT pins can be used as a digital control pin for other devices.

The LP5521 requires only four small, low-cost ceramic capacitors.

Comprehensive application tools are available, including command compiler for easy LED sequence programming.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technical documentation

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Type Title Date
* Data sheet LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump datasheet (Rev. I) Nov. 04, 2016
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Application note How to Select a RGB LED Driver Aug. 08, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
User guide AN-1632 LP5521TM Evaluation Kit (Rev. E) Sep. 23, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014
Technical article Solving the automotive EMI issues in new cars with all the screens Sep. 11, 2014
Application note AN-1523 LP5521 Power Efficiency Considerations (Rev. C) Apr. 30, 2013
Application note AN-1562 LP5521 Programming Considerations (Rev. A) Apr. 30, 2013
Application note Color-Management LED Drivers Have a Bright Future Jun. 20, 2007

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The LP5521 is a three channel LED driver designed to produce a variety of lighting effects for mobile devices. A high efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has (...)

  • Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency
  • Charge pump with soft start and overcurrent/short circuit protection
  • Low input ripple and EMI
  • Very small solution size, no inductor or resistors required
  • 200 nA typical shutdown current
  • Automatic power save mode
  • I2C (...)

The LP5523 is a fully integrated lighting management unit for producing lighting effects for mobile devices. The LP5523 includes all necessary power management, high-side current sources, temperature compensation, two wire (I2C compatible) control interface and programmable pattern generators. The (...)

Software development

Linux Driver for LP5521
LP5521SW-LINUX The Linux driver supports the LP5521 Three Channel LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.


Linux Mainline Status

Available in Linux Main line: Yes
Available through N/A

Supported Devices:

  • lp5521


Linux Source Files

The files (...)

SLAC731.ZIP (6117 KB)

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YFQ) 20 View options
WQFN (NJA) 24 View options

Ordering & quality

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