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.技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump 数据表 (Rev. I) | PDF | HTML | 2016年 11月 4日 | ||
白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020年 9月 21日 | |||
应用手册 | How to Select a RGB LED Driver | 2019年 8月 8日 | ||||
选择指南 | 电源管理指南 2018 (Rev. K) | 2018年 7月 31日 | ||||
选择指南 | 电源管理指南 2018 (Rev. R) | 2018年 6月 25日 | ||||
用户指南 | AN-1632 LP5521TM Evaluation Kit (Rev. E) | 2016年 9月 23日 | ||||
应用手册 | AN-1523 LP5521 Power Efficiency Considerations (Rev. C) | 2013年 4月 30日 | ||||
应用手册 | AN-1562 LP5521 Programming Considerations (Rev. A) | 2013年 4月 30日 | ||||
应用手册 | AN-1523 LP5521 Power Efficiency Considerations (cn) | 2008年 4月 17日 | ||||
应用手册 | 具备颜色管理功能的发光二极管驱动器:前景一片璀璨 | 英语版 | 2007年 6月 20日 |
设计和开发
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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
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lp5521
Linux Source Files
The (...)
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
DSBGA (YFQ) | 20 | Ultra Librarian |
VQFN (NJA) | 24 | Ultra Librarian |
订购和质量
- RoHS
- REACH
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- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
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