TPS92690EVM

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TPS92690EVM is one of Texas Instruments\' many evaluation modules that help designers evaluate and prototype solutions using the company\'s products. This particular module is part of TI’s LED Drivers, designed to facilitate the evaluation of the TPS92690, a direct high-voltage, constant-current LED driver.

The TPS92690 can drive an LED string from an AC or DC power source, offering the flexibility of a wide, dimmable input and a dedicated LED control input. It also supports the dimming of up to 25 LED strings in series, while providing constant LED current accuracy across a range of LED forward voltage values.

The TPS92690EVM evaluation module provides design engineers with the ability to develop high-performance LED systems. It is offered in two configurations, with either a 220VAC input voltage and a 100mA LED current, or with a 240VAC input voltage and a 150mA LED current.

The evaluation board includes an integrated power supply, a closed-loop feedback control circuit, a constant-current control circuit, a high-side current sense resistor, and two high-side MOSFET switches. The integrated power supply is designed to convert an AC or DC power source into a regulated, adjustable voltage that can be used to power the LED string.

The closed-loop feedback control circuit monitors the output of the LEDs and adjusts the current accordingly. This ensures that the LED current is maintained within a certain range as the LED forward voltage fluctuates. This ensures that the LEDs maintain a consistent light output.

The constant-current control circuit is responsible for regulating the current through the LEDs. This circuit is responsible for adjusting the current through the LEDs to maintain the dimming level desired. The circuit contains an integrated PWM generator that is used to control the current through the LEDs.

The high-side current sense resistor is used to measure the current being delivered to the LED string. This feedback is then used to adjust the output current in order to maintain a desired level of accuracy.

The two high-side MOSFET switches are used to control the current through the LED string. The switches allow the LED string to be turned on or off as needed.

Using the evaluation board, LED designers can develop LED lighting solutions that are capable of providing constant current control accuracy and dimming performance to meet the most demanding requirements. This will ensure that a wide variety of LED lighting solutions can be developed that meet the performance, safety, and cost targets of various applications.

The TPS92690EVM evaluation board provides designers with the flexibility of testing a wide variety of LED configurations, from low-voltage applications to high-voltage LED strings. This offers designers the ability to develop LED lighting solutions with high levels of efficiency, performance, and cost savings.

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