LMR62421XSDDEMO/NOPB

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The LMR62421XSDDEMO/NOPB evaluation board is an AC/DC (off-line) SMPS with applications such as power supplies, motors, and other constant power sources. It is engineered to bring reliable and efficient design solutions in power conversion. The evaluation board includes the AC power stage for boosting or bucking, and the DC power stage for stabilizing output.

The power stage consists of a switching power supply optimized for high efficiency, wide input voltage range (90-264Vac, 47-63Hz, single-phase), and low-power solution. An AC/DC converter with double-stage topology converters efficiently convert AC input to a DC output voltage on the secondary side. It also provides a regulated output.

For automotive applications, the evaluation board provides an interface to the controller that allows for easy control of the power stages. This connection provides an analog signal that controls the DC/DC converter for power efficiency and noise optimization. It also provides a controller signal to switch the power stages on and off in order to control the output voltage.

The evaluation board also includes integrated protection features such as over-voltage, over-temperature, short-circuit, and brown-out. These protection features will delay the power stages\' activation and prevent the system from damage, failure, or over-current.

The evaluation board operates with a switching frequency of up to 10MHz and uses the Half-bridge structure for the power stages. The Half-bridge is composed of two power FETs, one low-side FET and one high-side FET. When triggered by the PWM signal, the FETs switch on and off alternately, creating a steady DC voltage output. This switching frequency helps reduce switching losses, noise, and EMI (electromagnetic interference).

In order to keep the system efficient, the evaluation board includes a current-mode filter. This filter reduces the ripple current generated by the power stages and maintains constant voltage output without additional noise. It also maintains constant output voltage by compensating for various load conditions.

In addition, the evaluation board contains an embedded controller that allows users to adjust the output voltage, frequency, and current. This embedded controller includes a Graphic User Interface (GUI) to allow users to monitor the system performance and configuration. Furthermore, the controller communicates well with the selected microcontroller for easy power stage control.

Overall, the LMR62421XSDDEMO/NOPB evaluation board integrates real performance and reliable protection features for AC/DC off-line SMPS applications. With a wide input voltage range and a high efficiency design, the board offers an ideal solution for power management.

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