TPS61194
- Input voltage operating range 4.5 V to 40 V
- Four high-precision current sinks
- Current matching 1% (typical)
- LED string current up to 100 ma per channel
- Outputs can be combined externally for higher current per string
- High dimming ratio of 10 000:1 at 100 Hz
- Integrated boost/SEPIC converter
for led string power
- Output voltage up to 45 V
- Switching frequency 300 kHz to 2.2 MHz
- Switching synchronization input
- Spread spectrum for lower EMI
- Extensive fault detection
features
- Fault output
- Input voltage OVP and UVLO
- Open and shorted LED fault detection
- Thermal shutdown
- Minimum number of external components
The TPS61194 is a high-efficiency, low-EMI, easy-to-use LED driver with flexibility to support a wide range of applications. It has four high-precision current sinks that can be combined for higher current capability.
The TPS61194 has an integrated DC-DC supporting both boost and SEPIC mode operation. The converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. For EMI control the DC-DC converter supports spread spectrum for switching frequency and an external synchronization with dedicated pin.
The TPS61194 has wide input voltage range from 4.5 V to 40 V for robust support of different types of applications. The TPS61194 integrates extensive fault detection features. The device supports PWM brightness dimming ratio of 10 000:1 for 100-Hz input PWM frequency.
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 | TPS61194 High-Performance Four-Channel LED Driver datasheet (Rev. D) | PDF | HTML | 2021/5/27 | ||
| 應用說明 | Some Guidelines and Tips for the LED Driver Application | 2019/8/14 |
設計與開發
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TPS61194EVM — TPS61194 四通道 LED 驅動器評估模組
TPS61194EVM 評估模組 (EVM) 可協助設計人員評估此裝置的運作和性能。 TPS61194EVM 採用 TPS61194 驅動晶片，可高效驅動最多 4 組 LED 燈串（每組最多 12 顆 LED，共計 36 顆 LED），適用於 LCD 背光應用。 TPS61194EVM 的輸出電壓與電流額定值相關資訊，亦可參閱 TPS61194 產品規格表。 電池的電源供應連接與各訊號測試點，均配置於該評估板上。 LED 亮度可透過外部 PWM 訊號控制。 可單獨使用 LED 板作為負載，或將 LCD 板連接至輸出連接器。
TPS61194 Boost and SEPIC Unencrypted PSpice Transient Model Package (Rev. B)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | 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。