TPS61043
- Current Source With 18-V Overvoltage Protection
- Powers up to 4 LEDs in Series
- Input Voltage Range: 1.8 V to 6 V
- Internal 30-V Switch
- Up to 85% Efficiency
- Precise Brightness Control Using PWM Signal or
Analog Signal - Switching Frequency up to 1 MHz
- Internal Power MOSFET Switch 400 mA
- Operates With Small Output Capacitors Down to
100 nF - Disconnects LEDs During Shutdown
- No Load Quiescent Current 38 µA Typical
- Shutdown Current 0.1 µA Typical
- Available in a Small 3-mm × 3-mm QFN Package
The TPS61043 is a high-frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typical). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured so that the brightness is controlled by an analog signal as well, as described in Application Information. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device by limiting the output voltage to typically 18 V in case of a high-impedance output (for example, faulty LED). The TPS61043 device provides a solution for applications where higher LED currents or more than four LEDs in series must be powered.
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 | TPS61043 Constant Current LED Driver 数据表 (Rev. C) | PDF | HTML | 2016-2-2 | ||
| 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 | |||
| 应用手册 | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018-12-11 | ||||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | 2017-11-29 | ||||
| 应用手册 | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 2017-6-15 | ||||
| 模拟设计期刊 | DC/DC 转换器中电阻式反馈分压器设计考虑因素 | 英语版 | 2012-6-1 | |||
| 模拟设计期刊 | IQ：它是什么、不是什么以及如何使用 | 英语版 | 2011-8-17 |
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 |
|---|---|---|
| VSON (DRB) | 8 | Ultra Librarian |
订购和质量
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