LM3450AEV120V30/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LM3450AEV120V30/NOPB evaluation board offers a wide range of features to optimize LED driver performance in applications ranging from consumer lighting to power communication and automotive systems. LED drivers provide direct current (DC) control for LED light sources, and control the current according to the application\'s power demand. This evaluation board enables users to study the working principle of a constant current LED driver.

The LM3450AEV120V30/NOPB evaluation board comprises two distinct sections. The first section is a constant current LED driver, which provides a stable current at the output independent of the inputs. The second section consists of the board-mounted LED array, which is used to study the LED driver stability over time.

The LM3450AEV120V30/NOPB evaluation board incorporates a REB-LM3 voltage regulator as the input voltage switching regulator. This device monitors the input voltage and is automatically activated at a predetermined voltage threshold, allowing the LED driver to run at maximum efficiency. The REB-LM3 voltage regulator works by using a voltage divider on the input voltage to determine the correct switching voltage.

To control the output current, the LM3450AEV120V30/NOPB evaluation board is equipped with a MOSFET gate driver. This gate driver is used to control the on/off switching of the MOSFETs, thereby controlling the output current. The MOSFETs also provide a Faraday shield for insulation, preventing any voltage spikes from leaking through.

The LM3450AEV120V30/NOPB evaluation board also contains a pulse-width modulation circuit to further enhance the output accuracy. This circuit works by sending a fixed frequency square-wave signal to the MOSFET gate driver. The duty cycle of this signal is adjusted depending on the amount of output current desired. At lower output currents, the signal is more heavily dominated by the on-time period, and increasing the output current shortens the on-time period. This ensures that the output current remains consistent, regardless of the input voltage.

The LM3450AEV120V30/NOPB evaluation board also includes heat sinking to aid in thermal management. There is an aluminum sheet on the back side of the board, which is connected to ground and acts as a heat sink. This ensures that the board does not overheat during operation.

In conclusion, the LM3450AEV120V30/NOPB evaluation board is a versatile and efficient constant current LED driver. Its REB-LM3 voltage regulator, MOSFET gate driver, and onboard heat sink enable the board to run at maximum efficiency, while its pulse-width modulation circuit ensures consistent output current. This board is ideal for exploring the working principles of LED drivers in applications ranging from consumer lighting to power communication and automotive systems.

The specific data is subject to PDF, and the above content is for reference