Date：2017-03-03 09:49:47       View
Prototyping is one of the more exciting steps in the design. At this stage, in the ideal case, you have seen the design vision to become a reality, if everything can be planned. There may be a lot of problems, such as circuit board wiring, solder joints, component placement and parasitic capacitance, so in the test prototype power supply, it is best to be careful.
This is a common practice, but it should be noted that a digital multimeter should be used to check if there is a short circuit in all input and output phases. Also, check all the critical power points on the board to ensure that the circuit is not unintentionally shorted. The low-voltage analog circuits and digital circuits should be isolated as many sub-circuits as possible, which can help to debug problems and control losses in the event of problems.
The circuit board is likely to have at least one auxiliary power supply. The next step is to isolate this power and test the output with a load and no load. This helps analyze the characteristics of the power supply itself and helps isolate any problems that exist. You can use a precision multimeter to check voltage and ripple, such as the DMM 7510 (shown above), to ensure that all metrics meet the specifications. The DMM7510's graphical interface also helps you to observe high-frequency ripples on the screen. If you want to learn more about ripple measurement, the application guide here introduces you to the detailed measurement process.