PI3312-21-EVAL1

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PI3312-21-EVAL1 is an evaluation board designed for off-line DC/DC & AC/DC switching mode power supplies (SMPS). It features a max power output of 21W and 18-42V universal input voltage range. It utilizes the PI3312-21S PWM controller to achieve high efficiency and low standby power at full load. The board also includes all the necessary components to build a complete switching mode power supply, such as resonator, rectifiers, EMI filter components, MOSFETs, input and output capacitors, and so on.

The PI3312-21-EVAL1 is capable of operating with high voltage outputs Due to the novel construction and components employed, it is capable of providing excellent load and line regulation over a wide input voltage range. It utilizes an IR1150 MOSFET to minimize gate voltage and reduce switching losses. The board also incorporates high current Mosfets to minimize conduction losses, enabling it to deliver higher power efficiency. Additionally, the built-in synchronous buck converter is capable of supplying a wide range of output current without compromising load regulation.

The PI3312-21-EVAL1 is based on a primary-side control synchronous buck topology. To minimize switching losses, it employs a novel PWM controller design that enables it to operate without an optocoupler and an auxiliary winding secondary-side voltage sense. This eliminates the need for complicated control circuitry and reduces cost, size and component count.

The controller also has a non-overlap clock design to reduce switching noise, which provides excellent output voltage ripple and EMI reduction. Additionally, the PI3312-21-EVAL1 features a soft-start timer to ensure smooth circuit start-up without overshooting transient. This also prevents overloading the supply during start-up and avoids component stress.

The built-in overvoltage and overcurrent protection safeguards the power supply from sudden circuit overloads. The board has a very small footprint due to its miniaturized components. It also includes a PI3312-21-EVAL1 output filter and power rail, a voltage regulator, and a standard 4-pin connector. All these features make the PI3312-21-EVAL1 an ideal choice for applications requiring an efficient, reliable and cost-effective DC/DC & AC/DC switching mode power supply.

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