TPS61185
- 4.2 V to 24 V Input Voltage
- Integrated 2 A/40 V MOSFET
- 600 kHz to 2 MHz Programmable Switching Frequency
- Adaptive Boost Output for Best Efficiency
- Design to Use Small L-C Components
- Integrated Loop Compensation
- Eight 25 mA Current Sinks
- Up to 10 WLED in Series
- 1% Current Matching and Accuracy
- PWM Brightness Interface Control
- 200 mV Ripple Under PWM Dimming
- Driver for Input/Output Isolation PFET
- Programmable Over Voltage Threshold
- 100 Hz to 5 kHz Programmable PWM Dimming Frequency
- Up to 20 kHz Direct PWM Dimming Frequency
- Enhanced Electrostatic Discharge Immunity Level
- Built-in WLED Open/Short Protection
- Over Temperature Protection
- 24 Pin 4 mm × 4 mm QFN Package
- APPLICATIONS
- Notebook LCD Display Backlight
The TPS61185 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2 A/40 V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 80 LEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.
The TPS61185 supports the PWM method for brightness dimming. Simply tie the unused current sinks to ground if fewer than eight are needed. During PWM dimming, each of the eight current regulators is turned on/off at the duty cycle determined by an external pulse width modulation (PWM) signal input to the PWM pin. The frequency at which each current regulator turns on/off follows the input PWM signal on the PWMIN pin if the MODE pin is grounded. If the MODE pin is left floating or tied high, the regulators turn on/off at the frequency programmed by an external resistor on the FPWMO pin.
The TPS61185 IC supports boost switch frequency programming from 600kHz to 2MHz by an external resistor on the FSW pin. The device also provides a driver output for an optional external PFET connected between the input and inductor for truly disconnecting the battery from LED during the shutdown or fault protection. The device integrates resistor programmable over-voltage protection, soft-start, and thermal shutdown.
The TPS61185 IC has a built-in linear regulator to power the internal circuits of the IC. The device is in a 4 mm × 4 mm QFN package.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | WLED Driver for Notebooks with PWM Control Interface datasheet (Rev. A) | 2010/5/18 | |||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 應用說明 | Some Guidelines and Tips for the LED Driver Application | 2019/8/14 | ||||
| 應用說明 | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018/12/11 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 |
設計與開發
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TPS61185EVM-335 — 適用於 TPS61185 2A WLED 驅動器 IC 的評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGE) | 24 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。