LM2831XMF EVAL

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The LM2831XMF EVAL AC/DC (Off-Line) SMPS evaluation board is a versatile tool for exploring the features, benefits, and performance of this ultra-low standby power switched-mode power supply (SMPS). It features an integrated Voltage Smoother, offering superior output voltage stability under transient load conditions, and an external EMI filter, which helps achieve significant EMI reductions when compared to other switching power supplies.

The main goal of the evaluation board is to study and test the design parameters of the LM2831XMF regulator. The board consists of a core section, an input filter section, an EMI filter section, and an output converter section. The core section contains the LM2831XMF regulator IC, as well as other components to ensure that the maximum power rating of the regulator is not exceeded. The input filter section includes a line-of-sight filter, an EMI filter, and an output converter. Moreover, the output converter section contains a full-bridge rectifier, which is used to convert the input AC voltage to DC. The entire evaluation board is designed to allow for efficient regulation of the output voltage.

The LM2831XMF EVAL board allows for both AC and DC input voltage. It is compatible with a wide range of AC input voltages, ranging from 85-275 VAC. The internal voltage loop provides a stable output voltage within a few microseconds of a transient load change, achieving excellent stability. The output voltage is adjustable through two external resistors, which may also be used for current-limiting protection during start-up. Moreover, the board incorporates a single On/Off control pin so that it can be easily controlled on/off with an external input.

The power-saving features of the LM2831XMF EVAL are impressive. It can reduce the power dissipation under no load (within 200 mW) and standby (less than 50 mW) conditions as per the requirements of the Energy Star and IEC 62368-1 standards for power consumption. Moreover, it features a maximum efficiency rating of 92%, which is achieved under normal load conditions. The board utilizes a synergistic combination of Control Logic, Power Factor Correction, Voltage Smoothing, and Ripple Cancellation to achieve a minimal power loss while maintaining excellent regulation of the output voltage.

Overall, the LM2831XMF EVAL evaluation board is a valuable tool for anyone interested in designing efficient, low-power, and cost-effective AC/DC (Off-Line) SMPS systems. It allows for easy evaluation and testing of the design parameters of the LM2831XMF regulator, and its efficient operation helps to reduce energy consumption while achieving superior power regulation.

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