LM2756TMEV

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Evaluation Boards - LED Drivers

LM2756TMEV, which stands for LED Match Evaluation Kit MEV, is an LED driver-specific evaluation board produced by Texas Instruments. It is designed to be used with TI\'s integrated circuits such as LM2756, LM2756-ADJ, etc. This evaluation board provides a platform to evaluate and program, so users can use the board to optimize their designs and check the performance of the ICs, providing in-depth insight. Furthermore, LM2756TMEV supports various LEDs configurations such as constant current single string, constant-current dual-string, and constant-voltage single-string.

LM2756TMEV is based on a powerful closed-loop architecture, optimized to maximize energy efficiency and reduce overall system costs. It is designed with SiC MOSFET and 600V Super Junction, making it one of the most efficient LED drivers in the market. It also features a wide input voltage, high immunity to lighting transients, current sharing capability, very low EMI, and small form factor. Additionally, this evaluation board allows customers to quickly evaluate the features of LM2756 and LM2756-ADJ.

In terms of its working principle, LM2756TMEV uses the Phase-Locked Loop feedback circuit to regulate LED current. It starts by measuring LED current by comparing a voltage from an isolated sense resistor and the voltage from the current sensing comparator. The comparator\'s decision will be used to adjust the phase angle of the PWM. After the adjustment, the switching MOSFET will then regulate the LED current to a predefined level set by the external resistor. When the dimming range is outside the LED\'s linear region, the LED current will be further regulated by altering the PWM duty cycle accordingly. This design helps to reduce the power loss of the LED driver, significantly improving the overall efficiency.

In conclusion, LM2756TMEV is a highly versatile evaluation board designed specifically for evaluating and programming LED drivers. It features a robust closed-loop architecture and has a wide input voltage range to offer stable current output. By using this evaluation board, customers can quickly test out LM2756 and LM2756-ADJ, optimizing their designs and validating the performance of the ICs. In addition, its PLL feedback circuit allows for efficient switching, providing users with a stable and reliable current delivery. These features make LM2756TMEV a highly capable and cost-effective product for any LED driver applications.

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