LM3691TL-1.8EV/NOPB

Series:	--
Part Status:	Active
Main Purpose:	DC/DC, Step Down
Outputs and Type:	1, Non-Isolated
Voltage - Output:	1.8V
Current - Output:	1A
Voltage - Input:	2.3 V ~ 5.5 V
Regulator Topology:	Buck
Frequency - Switching:	4MHz
Board Type:	Fully Populated
Supplied Contents:	Board(s)
Utilized IC / Part:	LM3691

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<strong>Introduction</strong>The LM3691TL-1.8EV/NOPB is an evaluation board developed by Texas Instruments to evaluate the LM3691 primary-side, DC/DC and AC/DC (off-line) synchronous buck SMPS controller. It is designed to demonstrate the performance of the LM3691 in the applications such as buck converters and power systems for automotive power solutions. <strong>Application Field</strong>The LM3691TL evalution board can be used for various applications which require off-line SMPS power supply. It is suitable for power systems such as automotive power solutions, which require high efficiency and low EMI. The LM3691TL-1.8EV/NOPB evaluation board is particularly designed to handle up to 1.8 A of output current, over a wide range of input voltages from 4.3 V to 42 V.The LM3691TL-1.8EV/NOPB also finds its applications in buck converters where its power ratio is continuously adjustable from 2:1 to 4:1, based on Vref voltage. It is particularly useful for buck converters used in automotive power systems, enabling efficient power delivery.<strong>Working Principle</strong>The LM3691TL-1.8EV/NOPB operates in a single-stage buck synchronous converter configuration to regulate the output voltage. Its internal startup circuitry removes the need for an external startup resistor. The Vref voltage terminal is used to set the output voltage, and the current limit is fully adjustable.The LM3691TL-1.8EV/NOPB features over- and under-voltage protections, over-current protection and thermal shutdown. It also features short-circuit protection with an adjustable fault-time period. Other features of the evaluation board include low-ripple Burst Mode operation, low operating current and low EMI. The LM3691TL-1.8EV/NOPB evaluation board also comes equipped with a LED status indicator and a shutdown switch. This switch can be used to disable the output voltage or the entire board, thereby providing an easy and efficient way to monitor and control the output voltage. <strong>Conclusion</strong>The LM3691TL-1.8EV/NOPB evaluation board is an easy and efficient way to evaluate the LM3691 primary-side, DC/DC and AC/DC (off-line) synchronous buck SMPS controller. It is a great device for a variety of applications, particularly automotive power solutions, enabled by its adjustable power ratios and low EMI. Other features of the evaluation board include low-ripple Burst Mode operation, low operating current, adjustable fault-time period and over- and under-voltage protections. The LED status indicator and the shutdown switch allow for easy and efficient monitoring and control of the output.

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