LM2756
- Drives up to 8 LEDs with up to 30mA of Diode Current Each
- 32 Exponential Dimming Steps with 800:1 Dimming Ratio for Group A (Up to 6 LEDs)
- 8 Linear Dimming States for Groups B (Up to 3 LEDs) and D1C (1 LED)
- Programmable Auto-Dimming Function
- 3 Independently Controlled LED Groups Via I2C Compatible Interface
- Up to 90% Efficiency
- Total Solution Size < 21mm2
- Low Profile 20 Bump DSBGA Package (1.615mm × 2.015mm × 0.6mm)
- 0.4% Accurate Current Matching
- Internal Soft-Start Limits Inrush Current
- True Shutdown Isolation for LED’s
- Wide Input Voltage Range (2.7V to 5.5V)
- Active High Hardware Enable
All trademarks are the property of their respective owners.
The LM2756 is a highly integrated, switched-capacitor, multi-display LED driver that can drive up to 8 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver excellent current and brightness matching in all LEDs.
The LED driver current sinks are split into three independently controlled groups. The primary group (Group A) can be configured to drive four, five or six LEDs for use in the main phone display, while the secondary group (Group B) can be configured to drive one, two or three LEDs for driving secondary displays, keypads and/or indicator LEDs. An additional driver, D1C, is provided for additional indicator lighting functions.
The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass-Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.
The LM2756 is available in TI's tiny 20-bump, 0.4mm pitch, thin DSBGA package.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | Multi-Display Inductorless LED Driver w/32 Exponential Dimming Steps in DSBGA 数据表 (Rev. C) | 2013-5-1 | |||
| 白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020-9-21 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | Designing Energy-Efficient Handheld Illum Solutions (Rev. A) | 2013-4-30 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 20 | Ultra Librarian |