How to choose a more cost-effective power supply? (II)

6, ripple

Since the DC stabilized power supply is generally formed by the rectification and voltage regulation of the AC power supply, it is inevitable that some AC components are present in the DC stability amount, and the AC component superimposed on the DC stability amount is called For ripple. The smaller the ripple, the smaller the impact on the operation of the circuit.

7, load adjustment rate

When the input voltage is constant and the load changes from zero to the rated value, the output voltage changes. Usually expressed as a percentage.

8, output voltage programming accuracy

The deviation between the programmable power supply setpoint and the actual output value.

9, communication interface

Because many high-power power supplies are now installed in certain systems, the specific communication interfaces that the system needs must be communicated and confirmed before the purchase.

Selection considerations:

Be sure to consider the use of the power supply when selecting the power supply. For example, for capacitor aging, the ripple is not too large, and generally does not affect the quality of the capacitor. Therefore, the ordinary power supply can be used. For high-speed digital circuits, ripple and noise reaching a certain amplitude will interfere with the normal operation of the digital logic circuit, causing false triggers and logic errors. At this time, the choice of power supply should be a high-precision low-ripple and low-noise power supply.