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.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | TPS61043 Constant Current LED Driver データシート (Rev. C) | PDF | HTML | 2016/02/02 | ||
| ホワイト・ペーパー | Common LED Functions and LED Driver Design Considerations.. | 英語版 | 2020/09/21 | |||
| アプリケーション・ノート | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018/12/11 | ||||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| アプリケーション・ノート | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | 2017/11/29 | ||||
| アプリケーション・ノート | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 2017/06/15 | ||||
| アナログ デザイン ジャーナル | Design considerations for a resistive feedback divider in a DC/DC converter | 2012/04/26 | ||||
| アナログ デザイン ジャーナル | IQ: What it is, what it isn’t, and how to use it | 2011/06/17 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| VSON (DRB) | 8 | Ultra Librarian |
購入と品質
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