TPS92074
- Controlled Reference Derived PFC
- Digital 50/60 Hz Synchronization
- Constant LED current operation
- Single Winding Magnetic Configurations
- Low Typical Operating Current
- Fast Start-up
- Overvoltage Protection
- Feedback Short-Circuit Protection
- Wide Temperature Operation Range
- Low BOM Cost and Small PCB Footprint
- Patent Pending Digital Architecture
- 8-Pin SOIC and 6-Pin TSOT Available
The TPS92074 is a hybrid power factor controller (PFC) optimized for driving LED lighting solutions. The device monitors the converter rectified AC waveform using an internal, low-power, digital controller. The controller and DAC generate a synchronized triangular reference to regulate the output current. By allowing for some variation in the LED current over a line cycle and maintaining a regulated overall average current, high power factor solutions can be achieved.
Using a constant off-time control, the solution achieves low component count, high efficiency and inherently provides variation in the switching frequency. This variation creates an emulated spread spectrum effect easing the converters EMI signature and allowing a smaller input filter.
The TPS92074 also includes standard features: current limit, overvoltage protection, thermal shut-down, and VCC undervoltage lockout, all in packages
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 | Non-Isolated, Buck PFC LED Driver with Digital Reference Control datasheet | 2013/7/26 | |||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| SOT-23-THN (DDC) | 6 | Ultra Librarian |