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.

• 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

• Number of 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
• Operating temperature range (C)
• -30 to 85
• Rating
• Catalog

LP5521的完整型号有：LP5521TM/NOPB、LP5521TMX/NOPB、LP5521YQ/NOPB、LP5521YQX/NOPB，以下是这些产品的关键参数及官网采购报价：

LP5521TM/NOPB，工作温度：-30 to 85，封装：DSBGA (YFQ)-20，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LP5521TM/NOPB的批量USD价格：.464（1000+）

LP5521TMX/NOPB，工作温度：-30 to 85，封装：DSBGA (YFQ)-20，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LP5521TMX/NOPB的批量USD价格：.387（1000+）

LP5521YQ/NOPB，工作温度：-30 to 85，封装：WQFN (NJA)-24，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LP5521YQ/NOPB的批量USD价格：.658（1000+）

LP5521YQX/NOPB，工作温度：-30 to 85，封装：WQFN (NJA)-24，包装数量MPQ：4500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LP5521YQX/NOPB的批量USD价格：.581（1000+）

LP5521TMEV — LP5521 评估套件

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 (...)

LP5523EVM — LP5523 可编程 9 输出 LED 驱动器评估模块

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 (...)

LP5521SW-LINUX — 用于 LP5521 的 Linux 驱动程序

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 (...)

LP5521EVM GUI

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