TPS92511
- Wide Input Voltage Range: 4.5 V to 65 V
- Requires NO External Current Sensing Resistor
- Requires NO External Loop Compensation
- Ease of Use, Needs Minimum 5 Components
- 1000:1 Contrast Ratio Feasible
- Single Layer PCB Feasible
- Can Work as High Voltage Buck Regulators
- Can Work as Linear Current Shunt Regulators
- Integrated Low-side N-channel MOSFET
- LED Current Programmable up to 0.5 A
- Typically ±3.6% LED Current Accuracy
- Switching Frequency Programmable From 50 kHz to 500 kHz
- Current Limit Protection
- VCC Under-voltage Lock-out
- Thermal Shutdown Protection
- Support Analog Dimming and Thermal Foldback
- Power Enhanced SOIC-8 Exposed Thermal Pad Package (HSOP-8)
The TPS92511 is an easy to use 65V constant current buck converter for driving a single LED string with current up to 0.5A and efficiency up to 95%. Only 5 external components are required for basic operation and single layer PCB layout is feasible because of the integration of a N-MOSFET, no external current sensing resistor, no external compensation and the proper terminal assignment. A high-value external resistor programs the LED current so that fine tuning of the LED current can be achieved. Another high-value external resistor programs a constant switching frequency from 50kHz to 500kHz. EMI design becomes easier as a result of constant switching frequency. The TPS92511 provides a wide input voltage range from 4.5V to 65V. By adding simple external circuits, the device can handle applications with even higher input voltages.
The TPS92511 employs a proprietary control scheme to regulate the LED current without the need of sensing the LED current directly. It applies a floating buck topology with a low-side N-channel power MOSFET, which does not need boot-strapping capacitor. For multiple channel systems, the floating buck topology together with the proprietary control scheme allows a common-anode connection of the LED strings without an external current sensing network. This significantly reduces the number of wiring and as well as overall manufacturing cost.
The TPS92511 has very fast PWM dimming response time. For example, if the switching frequency is 500 kHz, the minimum DIM pulse width is 6µs and the dimming frequency is 150Hz, a contrast ratio of more than 1000:1 can be achieved.
The TPS92511 is available in the Power Enhanced SOIC-8 exposed thermal pad package.
For all available packages, see the orderable addendum at the end of the datasheet.技術資料
| 種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
|---|---|---|---|---|---|---|
| * | データシート | TPS92511 500-mA, 65-V Common Anode Constant Current Buck LED Driver Without External Current Sensing Resistor データシート (Rev. A) | PDF | HTML | 2014年 5月 16日 | ||
| ホワイト・ペーパー | Common LED Functions and LED Driver Design Considerations.. | 英語版 | 2020年 9月 21日 |
設計および開発
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TPS92511EVM — TPS92511 評価基板
The TPS92511EVM is an LED driver for a single string of 12 LEDs with an LED current of 0.5A. With the proprietary Pulse Level Modulation (PM) technology and integrated current sensing resistor, the EVM achieves good LED current regulation and a low component count.
PSPICE-FOR-TI — TI Design / シミュレーション・ツール向け PSpice®
設計とシミュレーション向けの環境である PSpice for TI (...)
| 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 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点
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