TPS61187
- Input Voltage 4.5 V to 24 V
- Maximum Output Voltage 38 V
- Integrated 2-A, 40-V MOSFET
- Programmable Switching Frequency 300 kHz to 1 MHz
- Adaptive Boost Output to WLED Voltages
- Wide PWM Dimming Frequency Range
- 100 Hz to 50 KHz for Direct PWM Mode
- 100 Hz to 22 KHz for Frequency Programmable Mode
- 100:1 Dimming Ratio at 20 kHz
- 10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
- Small External Components
- Integrated Loop Compensation
- Six Current Sinks of 30 mA Maximum
- 1.5% (Typical) Current Matching
- PWM Brightness Interface Control
- PWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming Method
- HBM ESD Protection 4 kV
- Programmable Overvoltage Threshold
- Built-in WLED Open/Short Protection
- Thermal Shutdown
The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.
The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.
For all available packages, see the orderable addendum at the end of the data sheet.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 | TPS61187 White-LED Driver For Notebooks With PWM Interface and Automatic Phase Shift データシート (Rev. E) | PDF | HTML | 2016/12/29 | ||
| 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 | Some Guidelines and Tips for the LED Driver Application | 2019/08/14 | ||||
| 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 |
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。
TPS61187EVM-528 — TPS61187EVM-528 評価モジュール
| 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 |
|---|---|---|
| WQFN (RTJ) | 20 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。