LM3549SQEV/NOPB

Series:	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Current - Output / Channel:	700mA
Moisture Sensitivity Level (MSL):	--
Outputs and Type:	1, Non-Isolated
Voltage - Output:	--
Features:	--
Voltage - Input:	--
Supplied Contents:	Board(s)
Utilized IC / Part:	LM3549

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Introduction

Evaluation boards, or EVBs, are development platforms designed to evaluate the functionality, efficiency and performance of a wide range of electronic components and systems. One such device, the Texas Instruments LM3549SQEV/NOPB, is a functional LED driver evaluation board with a wide range of applications and working principles. This article will outline the LM3549SQEV/NOPB’s application field and working principle.

Application Field

The application field for the LM3549SQEV/NOPB includes any applications that require LED driving. This includes LED lightbars and lighting fixtures, LED displays and signs, automotive LED lighting and many more. This device is well suited to a variety of LED driving applications due to its wide range of capabilities, adjustable control parameters and compact size.The LM3549SQEV/NOPB is ideal for driving LEDs in both linear or pulse width modulation (PWM) control modes. In linear mode, the board can output a constant LED current level and provide LED dimming control. In both linear and PWM mode, the LED current is adjustable to ensure optimal LED performance. In addition, this board has several protection features including short circuit, over temperature, and overtemperature protection.

Working Principle

The LM3549SQEV/NOPB operates using a high-side circuit topology in combination with low-side current regulation to achieve superior LED efficiency, performance, and brightness. High-side topology uses an integrated P-channel MOSFET to control the LED current, making it capable of high-current applications without adding an additional component.Low-side current regulation is used to ensure a consistent current is being supplied to the LEDs at all times, regardless of ambient temperature. To achieve this, an integrated current sense amplifier is used to measure the LED current in order to detect and regulate changes in load current.The LM3549SQEV/NOPB also features a wide input voltage range to accommodate various system AC line voltages. The board can be set to operate at either 1.2V or 1.5V, depending on the user’s system requirements. Additionally, this LED driver includes soft start circuitry to reduce inrush current and reverse input protection to prevent damage from wrong polarity.

Conclusion

The LM3549SQEV/NOPB is an impressive LED controller evaluation board that can be used to drive LEDs in a range of applications. This board’s wide range of features, adjustable control parameters, and compact size make it a suitable choice for driving LEDs in all types of applications. The LM3549SQEV/NOPB takes advantage of high-side topology, low-side current regulation, and several protection features to ensure optimal LED performance and protection. These features, combined with its wide input voltage range and soft start circuitry, make the LM3549SQEV/NOPB an attractive solution for those seeking performance-grade LED driver technology.

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