Why do power supply designers specify a maximum load capacitance?

Operating in OCP mode is an abnormal condition and thus power supply designers often specify a maximum load capacitance to be placed on the output of the power supply so that the supply is not intentionally operated in OCP mode.

What type of capacitor do I need for a power supply?

applications. Capacitive power supplies designed for long load life require capacitors with foils and dimensions specifically designed for this application. For its capacitance stability and ruggedness, we recommend using THB film capacitors like the Würth supply applications.

What are the characteristics of a capacitive power supply?

In the capacitive power supply, the most important characteristics are capacitance tolerance and stability.

Are capacitive power supplies short-circuit-proof?

In contrast to conventional designs, the capacitive power supplies are short-circuit-proof at the output. The vector diagram makes it clear: The majority of the input voltage drops out at the reactance of the capacitor with virtually no power dissipation being created in the capacitor.

Does increased capacitance affect power supplies?

Unfortunately, other characteristics of power supplies can be affected in a negative manner when the capacitance placed on the output of the supplies is increased. One of the characteristics of power supplies that is affected by increased capacitance on the output of the supply is the output overcurrent protection (OCP) function.

Are capacitive power supply circuits EMC compliant?

The capacitive power supply circuit is a mostly capacitive load as seen from the input. As we expected, there are no EMC compliance issues to consider in our example circuit. 06. SUMMARY