LM2796
- Drives up to 7 LEDs with up to 20mA Each
- LEDs Controlled in 2 Distinct Groups, for Backlighting 2 Displays (Main LCD and Sub-LCD)
- Excellent Current and Brightness Matching
- High-Efficiency 3/2x Charge Pump
- Extended Li-Ion Input: 2.7V to 5.5V
- PWM Brightness Control: 100Hz - 1kHz
- 18-bump Thin DSBGA Package: (2.1mm x 2.4mm x 0.6mm)
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The LM2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting. It can drive up to 7 LEDs in parallel with up to 20mA through each LED. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED-driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display. The second group (3 LEDs) can be used to backlight a secondary display or to provide other lighting features (keypad LEDs, for example). Brightness of the two groups can be adjusted independently with pulse-width modulated (PWM) digital signals.
The LM2796 works off an extended Li-Ion input voltage range (2.7V to 5.5V). Voltage boost is achieved with a high-efficiency 3/2×-gain charge pump.
The LM2796 is available in TI’s chip-scale 18-bump DSBGA package.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM2796 Dual-Display White LED Driver with 3/2x Switched Capacitor Boost 数据表 (Rev. A) | 2013年 5月 2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 | |||
EVM 用户指南 | AN-1321 LM2796 Evaluation Board (Rev. A) | 2013年 4月 30日 |
设计和开发
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LM2796TLEV — 具有 3 2x 开关电容器升压的双显示白光 LED 驱动器
The LM2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting.
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
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DSBGA (YZR) | 18 | Ultra Librarian |
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