What do novices tend to overlook when designing a power supply?

62368 Power Adapter Manufacturer: a few points that novice power supply designers tend to overlook.

EAHUNT COMPANY

Design as the beginning of all production activities, in the whole life cycle is critical. The switching power supply design, product quality is also closely related to the design, all subsequent departments will be docked with the design, procurement, production, PM, QC, business, engineering and many other departments will work together. Once there is a mistake, it will produce a very serious chain reaction. We should pay attention to the details. Today 62368 power adapter manufacturers will share with you some tips for switching power supply design.

1. Transformer drawings, PCBs, schematic diagrams of these three transformer fly-by-wire bit numbers need to be consistent.

Reason: safety certification requirements

This is a problem that many engineers will commit when applying for 62368 and other safety certification submittals.

2.X capacitor discharge resistance need to put two groups.

Reason: UL62368, CCC certification requirements to disconnect a group of resistors and then test the residual voltage of the X capacitor. A lot of newbies will make a mistake, the only way to correct the PCB Layout can be changed again, wasting their own time and procurement sampling.

3. Circuit debugging, OCP current limiting resistor more than one parallel resistance value to be designed as the same.

Reason: the larger the resistance value of the resistor to withstand the greater the power!

4. Circuit design, heat sink pin hole into a rectangular oval (experience value: 2 * 1mm).

Reason: to avoid assembly difficulties

Oval hole to facilitate the heat sink has a moving space, which is very favorable to the assembly and over the furnace.

5. Circuit debugging, abnormal test, the output voltage or OVP design should be less than 60Vac(Vpk)/42.4Vdc(Vrms).

Reason: safety requirements

This novice is easier to ignore, so apply for certification of the product must do OVP test, catch the output instant waveform.

6. Circuit design, electrolytic capacitor explosion-proof hole distance is greater than 2mm, the horizontal leg of the bend to stay 1.5mm.

Reason: quality improvement

Generally formal companies have this requirement, explosion-proof holes in the problem of Japan pay more attention to, except in special circumstances.

7. Circuit debugging, the output of the LC filter circuit needs to be aging to confirm the ripple, if the ripple is abnormal, please adjust the loop.

Reason: to verify product stability

This is very important, I often encountered this problem before, the production line after aging test ripple will become high, the phenomenon is the loop oscillation.

8. Circuit debugging, diodes in parallel, you should test a diode failure open circuit, resulting in anomalies (including TO-220 in the two diodes). Reason: quality improvement. Small companies generally do not do this action, a good product is to withstand any test.

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Eahunt62368 power adapter manufacturers, for many years focusing on power supply R & D and production, a variety of adapter safety certification here, military quality, support for customization, welcome to buy.

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