LM76003EVM-500K

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LM76003EVM-500K is an evaluation board for DC/DC and AC/DC (off-line)SMPS (Switch Mode Power Supplies). It is used for a variety of applications, mainly in the automotive, industrial and medical markets. The board offers a simple evaluation platform that is suitable for both device evaluation and product development. The board allows the designer to evaluate the performance of LM76003, a PWM controller used in AC/DC and DC/DC SMPS systems.

The general application field for the LM76003EVM-500K board includes a wide range of products such as automotive, industrial, medical, consumer, computing, lighting, and many other electronic applications. It is well suited for high reliability applications such as AC/DC and DC/DC SMPS where the load current is high and the conversion efficiency is critical. This evaluation board can also be used to test and develop other switching power supply applications such as: DC-DC converters, AC-DC adapters, switch-mode noise filters, resonant power supplies, and DC motor drives.

The working principle of the LM76003EVM-500K board is based on the standard Voltage Mode (VM) or constant frequency architecture. This architecture employs a high frequency current mode PWM controller, which is based on the LM76003 Vxo family. The operational amplifier in the controller is responsible for comparing the sensed output voltage with a reference voltage, and then modulating the PWM duty cycle to match the desired output voltage. A MOSFET driver is used to control the MOSFET switch, which is connected to the output of the transformer. The transformer isolates the input from the output power supply, providing power conversion in both AC/DC and DC/DC SMPS designs.

The LM76003EVM-500K evaluation board features a wide 500 kHz operation frequency range. This high switching frequency, combined with the constant voltage mode architecture, makes the board suitable for high efficiency applications. Furthermore, the board supports both discontinuous and continuous current mode operations, and is capable of producing up to 40W of power at an efficiency of up to 91%.

To ensure reliability and robustness, the LM76003EVM-500K evaluation board incorporates a platform of protection and diagnosis features. This includes under voltage lockout (UVLO) protection, over temperature shutdown (OTSD) protection, and over current protection (OCP). In addition, the board also features a complete set of monitoring and diagnostic capabilities, including an LED indicator for switching power supply health and fault indication, as well as an LED indicator for software status.

In conclusion, the LM76003EVM-500K evaluation board is a great tool for the evaluation and testing of AC/DC and DC/DC SMPS designs. Its wide 500 kHz operation frequency range and constant voltage mode architecture allows for high efficiency applications, while its built-in protection and diagnosis features ensure reliability and robustness. The board can also be used to evaluate and develop other switching power supply applications, such as DC-DC converters, AC-DC adapters, switch-mode noise filters, resonant power supplies, and DC motor drives.

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