LM5046EVAL/NOPB

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The LM5046EVAL/NOPB is a high-performance evaluation board from Texas Instruments. Designed for use in applications like high-side DC/DC and AC/DC (off-line) SMPS circuits, it is intended to facilitate the development of high efficiency, low noise and low quiescent current power supplies.

The evaluation board features a LM5046 synchronous buck regulator evaluating a SMPS circuit, from 3V to 80V. The board also includes a robust power supply loop, including an input range of 5V to 80V with LM5046SQ direct-drive of external MOSFETs. This allows for driving larger power outputs using a single-ended secondary-side design.

The LM5046 EVAL/NOPB is designed to simplify the evaluation of the LM5046. Through current-mode control, the board maintains accurate operation over varying input and output voltages, delivering excellent line and load transient response. The board also features a useful variety of components that enables the user to test the LM5046 in different power supply configurations.

The board’s SMPS circuit is featured on the high-side, Linear Technology LT3092 3-phase Synchronous Buck Regulator, current-mode control voltage-mode (VCM) driver. This high-side buck converter is used to produce an output voltage regulation over a wide input voltage range. In this configuration, LM5046 is capable of delivering up to 61A of output current at an efficiency of up to 95%.

In addition to the high-side buck converter, the LM5046 EVAL/NOPB evaluation board also includes an adjustable linear regulator based on an LT3092. This linear regulator provides precise output voltage control for applications requiring flexibility of output voltage with low ripple and noise.

The linear regulator can be operated with a symmetric or asymmetric input voltage, and separate channel p-channel MOSFETs can be used to provide low quiescent current and fast transient response. A programmable soft-start circuit is also integrated, allowing for smooth start-up operation in applications where the input supply voltage drops below the threshold. The board also includes a power good indication, over-voltage protection, and under-voltage protection.

The LM5046 EVAL/NOPB evaluation board is designed to optimize board layout and reduce board size, making it suitable for applications where space is a concern. The board is also optimized for thermal performance, allowing the user to test their designs with very little effort.

Overall, the LM5046EVAL/NOPB is a great tool for evaluating the LM5046 in DC/DC and AC/DC (off-line) SMPS applications. With its wide input range and robust power loop, it provides the user with an efficient and reliable design platform. The board’s programmable soft-start circuit, over-voltage and under-voltage protections, and power good indicator ensure that the user’s designs have the best possible protection, and that they are optimized for the application.

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