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.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TPS6105x 1.2-A High-Power White LED Driver 2-MHz Synchronous Boost Converter With I2C Compatible Interface datasheet (Rev. A) | PDF | HTML | Sep 30, 2015 |
| White paper | Common LED Functions and LED Driver Design Considerations | Sep 21, 2020 | ||
| Application note | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | Dec 11, 2018 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun 25, 2018 | ||
| Application note | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | Nov 29, 2017 | ||
| Application note | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | Jun 15, 2017 | ||
| Application note | Minimizing Ringing at the Switch Node of a Boost Converter | Sep 15, 2006 |
For additional terms or required resources, click any title below to view the detail page where available.
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.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YZG) | 12 | Ultra Librarian |
| VSON (DRC) | 10 | Ultra Librarian |
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