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.| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump datasheet (Rev. I) | PDF | HTML | Nov 4, 2016 |
| White paper | Common LED Functions and LED Driver Design Considerations | Sep 21, 2020 | ||
| Application note | How to Select a RGB LED Driver | Aug 8, 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun 25, 2018 | ||
| 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 |
For additional terms or required resources, click any title below to view the detail page where available.
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 (...)
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 (...)
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.
Available in Linux Main line: Yes
Available through git.ti.com: N/A
The (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YFQ) | 20 | Ultra Librarian |
| VQFN (NJA) | 24 | Ultra Librarian |
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