The TPS6105x device is based on 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 (refer to TPS61052).
For highest flexibility, the LED current or the desired output voltage can be programmed through an I2C compatible interface. 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 through the I2C-compatible interface, reducing the input current to 0.3 µA (typical). During shutdown, the LED pin is high impedance to avoid leakage current through the LED.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | TPS6105x 1.2-A High-Power White LED Driver 2-MHz Synchronous Boost Converter With I2C Compatible Interface datasheet (Rev. A) | PDF | HTML | 30/09/2015 | |
| Informe | Common LED Functions and LED Driver Design Considerations | 21/09/2020 | |||
| Nota sobre la aplicación | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 11/12/2018 | |||
| Guía de selección | Power Management Guide 2018 (Rev. R) | 25/06/2018 | |||
| Nota sobre la aplicación | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | 29/11/2017 | |||
| Nota sobre la aplicación | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 15/06/2017 | |||
| Nota sobre la aplicación | Minimizing Ringing at the Switch Node of a Boost Converter | 15/09/2006 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
The TPS6105x EVM Software provides a software interface for the TPS6105x EVM boards. Use this software to change the TPS6105x IC registers via the USB Interface Adapter.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| DSBGA (YZG) | 12 | Ultra Librarian |
| VSON (DRC) | 10 | Ultra Librarian |
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