TPS61055
- Four Operational Modes
- Torch and Flash up to ILED = 700 mA
- Voltage-Regulated Boost Converter: 5.0 V
- Shutdown: 0.3 µA (Typical)
- Total Solution Circuit Area < 25 mm2
- Up to 96% Efficiency
- Integrated LED Turnon Safety Timer
- Zero Latency TX-Masking Input
- Integrated Low Light Dimming Mode
- LED Disconnect During Shutdown
- Open/Shorted LED Protection
- Over-Temperature Protection
- Available in a 12-Pin NanoFree™ (CSP) and 10-
Pin VSON Packaging
The TPS6105x device uses a high-frequency synchronous-boost topology with constant current sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current.
The 2-MHz switching frequency allows the use of small and low-profile 2.2-µH inductors. To optimize overall efficiency, the device operates with only a 250-mV LED feedback voltage.
The TPS6105x device not only operates as a regulated current source, but also as a standard voltage-boost regulator. This additional operating mode can be useful to supply other high-power devices in the system, such as a hands-free audio power amplifier, or any other component requiring a supply voltage higher than the battery voltage.
The LED current or the desired output voltage can be programmed through two logic signals (MODE0/1). To simplify flash synchronization with the camera module, the device offers a trigger pin (FLASH_SYNC) for fast LED turnon time.
When the TPS6105x is not in use, it can be put into shutdown mode, reducing the input current to 0.3 µA (typical). During shutdown, the LED pin is high impedance to avoid leakage current through the LED.
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 | High Power White LED Driver 2-MHz Synchronous Boost Converter datasheet (Rev. B) | PDF | HTML | 2015/9/11 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 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 | ||||
| 應用說明 | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | 2017/11/29 | ||||
| 應用說明 | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 2017/6/15 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (DRC) | 10 | Ultra Librarian |