LM3644EVM

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The LM3644EVM evaluation board (E Board) is a device used to evaluate the capabilities of an LM3644 LED driver integrated circuit. The board allows users to analyze the performance of the driver, evaluate its features, and experiment with various configurations and application settings. As an evaluation board, it facilitates tests and experiments with the various features of the LM3644 integrated circuit.

The LM3644 is a Switchmode LED Driver capable of driving up to 7 high-current LEDs from a single inductor. It is a cost-effective and regulation-compliant solution for driving multiple LEDs with a single output. The device offers dimming control for LED current and light intensity, as well as over-temperature and short-circuit protection. The board includes all necessary components to control the LED current and PWM dimming control.

The LM3644EVM is a 32mmx30mm evaluation board developed to facilitate the testing and characterization of the LM3644 LED driver. The board is designed to enable a wide range of tests and experiments on the LM3644 driver, including: closed-loop testing, open-loop testing, temperature-power verification, temperature-current verification, and dimming ratio analysis.

The board consists of several components and interfaces to enable testing of the LM3644 driver. A 9V-15V DC power supply is used to power the LM3644EV. The power supply is connected to the J1 power connector on the board. The inputs for the LM3644EV can be accessed via the J2 connector, which consists of the Voltage IN and EN pins. The Voltage IN pin provides the power input to the LM3644EV while the EN pin is used to enable the driver.

The board includes a current sense resistor (R1), which sets the LED current and is used to measure the current through the LEDs. The current sensing resistor is connected between the RC and IS pins of the E Board. The current sense resistor is adjustable to set the desired LED current. The board also includes an adjustable resistor, Rf, which can be used to adjust the dimming ratio as required.

The board also includes a sensing diode (D1), which is used for temperature sensing. The sensing diode is connected to the TS and GND pins of the E Board. The sensing diode is used to provide temperature feedback to the driver in order to regulate the LED current and to ensure that the LED current remains constant across temperature and load variations.

The board also includes a serial port (J3) that can be used to communicate with the driver and configure the LED current and dimming control. The board also includes digital logic signals for communication and control. These logic signals are connected toC & SEL pins, which are used to select the LED current setting and to enable the driver.

The LM3644EVM provides a versatile platform to evaluate the capabilities of the LM3644 LED Driver. The various features of the driver can be tested and evaluated with different configurations and settings. The board enables testing and evaluation of various aspects of the driver, such as LED current control, dimming control, over-temperature and short-circuit protection, etc.

In addition, the board enables exploration and experimentation with the variety of applications of the LM3644 driver. The board can be used for a range of applications, including automotive and general lighting, LED sign boards and displays, stage and theatrical lighting, and more. The board can also be used to evaluate the performance of the driver in different temperature and load conditions.

The LM3644EVM is an extremely useful tool for evaluating the capabilities of the LM3644 LED Driver. The board provides all the necessary components and interfaces for testing and exploring the driver’s features. It allows users to analyze the performance of the driver, evaluate its features and experiment with various configurations and application settings.

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