LM3424BSTEVAL/NOPB

Series:	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Current - Output / Channel:	1A
Moisture Sensitivity Level (MSL):	--
Outputs and Type:	1, Non-Isolated
Voltage - Output:	--
Features:	Dimmable
Voltage - Input:	10 V ~ 26 V
Supplied Contents:	Board(s)
Utilized IC / Part:	LM3424

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Evaluation Boards - LED Drivers: LM3424BSTEVAL/NOPB Application Field and Working Principle

The LM3424BSTEVAL/NOPB is an LED driver evaluation board from Texas Instruments, developed as a part of their LED Driver portfolio. It helps designers evaluate the capabilities of their LM3424/LM3426 LED drivers in linear boost or buck-boost mode. The board is capable of powering LEDs from 8V to 24V, and it can handle load currents from 10mA to 1A. This evaluation board comes with TPS3707EVM, an adjustable voltage regulator for DC output ranges from 3.3V to 0.7V. Both the LM3424 and LM3426 have adjustable switching frequency and peak current settings, allowing users to adjust the evaluation board to their needs.The LM3424BS Evaluation Board offers an integrated boost topology with a peak current control. This feature enables higher efficiency while regulating the currents and protecting against overloading and short-circuiting. It also comes with a low-side current sense circuit and a load disconnect circuit, allowing for accurate current sensing, as well as efficient battery management and over-discharging protection. Moreover, the LM3424BS has a wide voltage operation range (from 8V to 24V) and adjustable output current ranging from 10mA to 1000mA, allowing configurable power solutions for LED light application.The LM3424BS LED driver evaluation board is designed to operate in linear boost or buck-boost mode. The operating principles of the board can be broken down into three main parts:1. The input stage: This stage consists of an input voltage regulator, which is placed between the output voltage source and the LM3424/LM3426 switch. This voltage regulator regulates the input voltage according to the input voltage source, allowing the LM3424/LM3426 to start up properly and allowing the output voltage to be accurately predicted and monitored.2. The current sensing and control stage: This stage comprises of a feedback sensing resistor and a current sense amplifier. The feedback resistor prevents excessive input currents from getting through, while the current sense amplifier senses the amount of load current flowing and regulates it appropriately.3. The output and control stage: This stage consists of LM3424/LM3426 switches, and the output is determined by the input voltage and the load. The internal adjustment of the switches allows users to adjust the power output, either in boost or buck-boost mode, according to the load current drawn from the output.The LM3424BS Evaluation Board also comes with various protection features, such as temperature protection, input under-voltage protection, output over-voltage protection, and intelligence-protection, which protect the system in the event of a failure. By utilizing these protection features and the current regulating capability, the LM3424BS Evaluation Board is suitable for a variety of LED lighting applications, including architectural lighting, LCD backlighting, and automotive lighting. The board is also versatile, as it is able to power multiple loads at once and can quickly change the output voltage according to the load current.In conclusion, the LM3424BSTEVAL/NOPB is an LED driver evaluation board from Texas Instruments. It is designed with a linear boost or buck-boost topology and features adjustable current settings, feedback sensing prevention circuit, overload, and short-circuiting protection features. The board is capable of supplying 8V to 24V of output voltage using a TPS3807EVM variable voltage regulator, and has adjustable outputs of 10mA to 1000mA. It is also capable of powering multiple loads at once and helps protect other components with its integrated protective features.The LM3424BS Evaluation Board is suitable for architectural lighting, LCD backlighting, and automotive lighting applications.

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