GUI for evaluation module (EVM)
LP5521
3 channel RGB/White LED driver with internal program memory and integrated charge pump
Data sheet
LP5521
- 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
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.Technical documentation
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View all 8 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump datasheet (Rev. I) | PDF | HTML | 04 Nov 2016 |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Application note | How to Select a RGB LED Driver | 08 Aug 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| User guide | AN-1632 LP5521TM Evaluation Kit (Rev. E) | 23 Sep 2016 | ||
| Application note | AN-1523 LP5521 Power Efficiency Considerations (Rev. C) | 30 Apr 2013 | ||
| Application note | AN-1562 LP5521 Programming Considerations (Rev. A) | 30 Apr 2013 | ||
| Application note | Color-Management LED Drivers Have a Bright Future | 20 Jun 2007 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LP5521TMEV — LP5521 Evaluation Kit
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 (...)
User guide: PDF
Evaluation board
LP5523EVM — LP5523 Programmable 9-Output LED Driver Evaluation Module
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 (...)
Driver or library
LP5521SW-LINUX — Linux Driver for LP5521
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 git.ti.com: N/A
Supported Devices:
- lp5521
Linux Source Files
The (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
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 (...)
| Package | Pins | Download |
|---|---|---|
| DSBGA (YFQ) | 20 | View options |
| VQFN (NJA) | 24 | View options |
Ordering & quality
Information included:
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- REACH
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- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
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Information included:
- Fab location
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