LM21215EVM/NOPB

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The LM21215EVM/NOPB evaluation board is a very useful tool for evaluating different applications for DC/DC and AC/DC (off-line) switching power supplies. LM21215 is a single-channel, single-phase, current mode PWM controller with internal low-side MOSFET. This evaluation kit helps to minimize the effort and cost associated with testing DC/DC and AC/DC (off-line) switching power supplies in the lab. As an evaluation board, the LM21215EVM/NOPB provides quick access to the features of the LM21215 device and enables the user to quickly and easily evaluate the application.

The LM21215EVM/NOPB is designed to be a fully integrated proof-of-concept platform for DC/DC and AC/DC switching power supply applications. The board is populated with all the necessary components to evaluate the operation and behavior of the LM21215 device. The LM21215EVM/NOPB provides a comprehensive range of features to help both initial design and product development. The board features an adjustable output voltage with an internal resistor network, and adjustable switching frequency. The board also includes integrated monitoring and protection circuitry for over current and over temperature protection.

In terms of application fields, the LM21215EVM/NOPB is ideal for applications like AC/DC power adapters, power over Ethernet (PoE), chargers, motor control, lighting, etc. that require fixed-frequency voltage-mode PWM controllers. It also is well suited for DC/DC converter applications such as DC/DC buck, boost, and flyback converters. The board provides a sound platform to engineer and develop DC/DC and AC/DC (off-line) switching power supplies for different end applications.

The LM21215EVM/NOPB operates according to the principle of pulse-width modulation (PWM). The main components of the board are the controller IC, the opto-coupled feedback loop, the integrated MOSFETs and the external components. The controller IC serves as the main control element which drives the switching elements as well as the opto coupler feedback loop. The integrated MOSFETs and the external components are the circuit\'s power components. The controller IC uses a voltage-mode PWM topology which serves to adjust the duty cycle and thus set the output voltage according to the input voltage and feedback from the opto-coupler. The opto-coupler feedback loop measures the output voltage and controls the output voltage by adjusting the duty cycle.

In conclusion, the LM21215EVM/NOPB makes it fast and easy to develop DC/DC and AC/DC (off-line) switching power supplies for a wide variety of applications. The board helps reduce cost and development time in the lab, while providing a fully integrated proof-of-concept platform. It features adjustable output voltage, adjustable switching frequency, as well as integrated monitoring and protection circuitry. The LM21215EVM/NOPB is a great tool for testing and developing high performance switching power supply solutions.

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