TPS61140EVM-157

Texas Instruments TPS61140EVM-157 is a low power and cost effective evaluation board for constant current LED drivers. It is designed to test the driver performance and superior color accuracy of single- and multi-string LED applications. This evaluation board is ideal for testing and optimizing individual components or complete system development that uses an array of LEDs.

The TPS61140EVM-157 can provide directional thrust to drive one or two LEDs in series and parallel. The board also supports two-step dimming, constant voltage, analog dimming, and pulse-width modulation (PWM). It features a wide output voltage range of 6V to 42V, and a standard output current of 200 mA.

The board circuit includes two ICs, two capacitors, two resistors, five LEDs and two toggle switches. The functional ICs consist of a high efficient step-down regulator TPS61140, and a high-side power transistor TPS61110.

The TPS61140 IC is designed to provide a wide range of power support for LEDs used in automotive, industrial and consumer applications. The TPS61140 IC supports a variety of operating modes such as buck-boost or buck with its high efficiency, fast transient response and current loop architecture.

The TPS61110 IC is a high-side power transistor, which can provide directional thrust for LEDs with low power loss and high efficiency. The board also includes components like resistors, two divider networks and two toggle switches that enable two-step dimming and analog dimming functions.

The TPS61140EVM-157 also contains LEDs of different colors. The LEDs are connected in series and in parallel with the circuit. This connection layout enables the board to achieve different color combinations with different drive current levels. The TPS61140EVM-157 also supports PWM dimming for dimming applications.

The evaluation board works with 12V input voltage and also provides an integrated temperature sensing mechanism. It integrates seven temperature modes ranging from -40oC to 150oC. The board also has a steady state input current of 3.5A and a minimum switching frequency of 1.2MHz.

The TPS61140EVM-157 evaluation board is a complete solution for LED applications. Its features make it suitable for a wide range of LED applications, including automotive, industrial, general lighting, LED signs, display backlighting, and more. Furthermore, its integrated two-step dimming and analog dimming capabilities allow designers to optimize system performance.

In conclusion, the TPS61140EVM-157 evaluation board can provide a wide range of power options for driving single- and multi-string LED applications, with a maximum efficiency of up to 95%. It also offers two-step dimming and analog dimming functions, along with a temperature sensing mechanism for reliable performance over a wide temperature range.