TPS92311A19230VEVM

Evaluation Boards - LED Drivers contain components that are used to control the brightness and color of individual LEDs. In this article, the TPS92311A19230VEVM is going to be discussed in order to understand its application fields and working principle.

Application Field

The Texas Instruments TPS92311A19230VEVM evaluation board is useful for driving white, red/green/blue (RGB) and three-string/four-string RGB LEDs, and provides control of color, brightness and other parameters for the function of LEDs. With independent temperature control for strings, TPS92311A19230VEVM evaluation boards is suitable for applications like lighting vector, ambient light vector as well as illuminating LED video walls.

Working principle

The Texas Instruments TPS92311A19230VEVM evaluation board is based on LM3418, which is a synchronous buck LED Driver and provides 3-step dimming and up to 1A drive current per string with up to four strings. In addition to its internal PWM, the TPS92311A19230VEVM offers external PWM control as well. The LM3418 includes integrated under-voltage protection, short-circuit protection, and thermal shutdown circuits.

The TPS92311A19230VEVM evaluation board is powered by a separate, 4.5-V to 28-V supply. The board\'s output voltage is regulated, and is set to 12 V for all LEDs strings. The maximum currents for each of the strings are clamped to maximally 1 A, via an external sense resistor. An external VREF pin is provided for adjusting the current setting.

Conclusion

The TPS92311A19230VEVM evaluation board provides control for white, RGB and three-string/four-string RGB LEDs. It is powered with a separate, 4.5-V to 28-V supply and provide up to 1A drive current per string with up to four strings. With its built-in features such as under-voltage protection, short-circuit protection, and thermal shutdown, the TPS92311A19230VEVM is suitable for applications like lighting vector, ambient light vector as well as illuminating LED video walls.