PI3301-20-EVAL1

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The PI3301-20-EVAL1 board provides an evaluation platform for the PI3301 PWM controller for DC/DC and AC/DC off-line SMPS. It is a low cost, reliable and simple tool designed to enable designers to quickly evaluate the design and performance of the PI3301 in a working system. In the following sections, the application field and working principle of the PI3301-20-EVAL1 will be discussed.

Application Field

The PI3301-20-EVAL1 board is suitable for use in a wide range of DC/DC and AC/DC off-line SMPS applications such as AC/DC adapters, open frame supplies, PC power supplies, telecom power supplies, notebook power supplies and embedded SMPS applications. The board is designed to work with 5V and 12V input voltage, and the output voltage can be adjusted from 3.3V to 24V. The board can provide a maximum output current of 20A and a maximum output power of 192W.

Working Principle

The PI3301-20-EVAL1 board is an evaluation board based on the PI3301 PWM controller. The board features an inductor-based Buck (step down) topology where the output voltage is lower than the input voltage. The PI3301 is a single-channel synchronous rectified PWM controller which adopts a fixed frequency pulse width modulation (PWM) scheme. The PI3301 is designed to work with green mode PFC and supports an 85Vac load with online and line feed forward functions to reduce the line transient effects. The PI3301 has an optional built-in programmable components to set the start-up current limiting, the minimum off-time of the synchronous rectification, and the PWM average current control.

The PI3301-20-EVAL1 board also features a step up topology for higher voltage applications. It has an input voltage range of 3V to 24V and an output voltage range of 6V to 65V. It is capable of providing a maximum input current of 20A and a maximum output power of 1.2kW. It also features an optional built-in programmable components to set the soft-start period, the start-up current limiting, and the PWM average current control.

The PI3301-20-EVAL1 board features an on-board secondary-side synchronous rectification for high efficiency. It also features over voltage protection, over current protection, short-circuit protection, and external compensation for faster transient response. The PI3301-20-EVAL1 board can be used with the PI3301-SW software to further optimize the power supply design.

In conclusion, the PI3301-20-EVAL1 board is the perfect tool for evaluating the design and performance of the PI3301 PWM controller for DC/DC and AC/DC off-line SMPS applications. It provides designers with a low cost, reliable and simple platform for testing and validating their designs. The board features an optional on-board programmable components to customize the power supply design for specific applications.

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