EVB10803_01 Development Boards, Kits, Programmers

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Introduction

The EVB10803_01 evaluation board contains a constant current LED driver capable of driving up to eight LEDs serially or eight strings in parallel. This evaluation board is designed for testing high-current LED driver systems and applications in a variety of industries.

The driver is based on the Texas Instruments LM5109 controller and features a 120-V input, allowing the driver to be used in a variety of applications and adaptable to different voltage sources. The LM5109 driver is designed for driving loads up to 1000 W and provides current regulation, inrush current management, and overvoltage protection (OVP). This evaluation board also includes a user-adjustable current-sense resistor and a test header, allowing current output to be adjusted in real-time.

Application field

The EVB10803_01 evaluation board can be used in a variety of LED driver applications, including outdoor lighting, displays, and automotive lighting. The driver can be used in a variety of LED lighting schemes, such as LED channel lighting, area lighting, and LED spot lighting. The LM5109 driver can also be used to drive regular fluorescent, halogen, and other incandescent lighting sources. Additionally, the driver is also suitable for drive applications in the HVAC, medical, and agricultural industries.

Working principle

The working principle of the LM5109 driver is to regulate the current output by measuring the voltage drop across the current sense resistor. The driver works by adjusting the duty cycle of the output current, maintaining a constant voltage across the LED load. The driver adjusts the duty cycle based on the sensed LED current, creating a closed-loop system that ensures precise LED current regulation.

The driver also features an integrated soft-start circuit, which reduces the peak inrush current at the time of power-up. This feature prevents damage to the LED load due to rapid increase in current at start-up. The integrated overvoltage protection feature ensures that the output voltage does not exceed a certain threshold, protecting the LED load from damage due to excessively high voltage.

The driver is also capable of multiple lighting schemes, such as dimming and pulse width modulation. The driver is capable of dimming the LED current output and easily adaptable to a wide range of dimming curves. Additionally, the driver is capable of pulse-width modulation, providing accurate control over the LED load.

The EVB10803_01 evaluation board also includes a user-adjustable current-sense resistor and a test header, which allows direct monitoring of the LED current. This feature allows users to measure and monitor the LED current with multiple test configurations.

Conclusion

The EVB10803_01 evaluation board is designed for testing high-current LED driver systems and applications in a variety of industries. This evaluation board contains a constant current LED driver based on the Texas Instruments LM5109 controller, which is capable of driving up to eight LEDs serially or eight strings in parallel. The driver features integrated overvoltage protection, a soft-start circuit, and is capable of multiple dimming and PWM schemes. Additionally, the board includes a user-adjustable current-sense resistor and a test header, allowing for precise monitoring and adjustment of the LED current.

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