Main items and handling process of power supply reliability test

Date：2022-02-24 17:16:54Views：1020

The power module is a kind of power converter, which can be directly welded and inserted into the circuit board. As the power source for the survival of modern science and technology, it has become one of the most critical components. The reliability of power supply will affect the reliability of equipment to a great extent. Therefore, the reliability test of power supply has become the premise of all parameters and performance guarantee. What are the reliability test items of power module?

Reliability test items of power module

1. Short circuit test

No load short-circuit test (let the power supply repeat the test from no-load to short circuit), full load short-circuit test (let the power supply continue the test from full load to short circuit), short-circuit startup (let the power supply repeat the test from short circuit to power on).

2. Switch on test

Input mains power, over input voltage point, under input voltage point, the maximum load of the power module, close for 15 seconds and disconnect for 5 seconds.

3. Input transient high voltage test

Rated voltage input, use oscilloscope to record the number of cycles of high voltage, the power supply operates at full load, and the superimposed voltage jump operates continuously.

4. Output dynamic load test with unstable input power supply

Adjust the input voltage to unstable jump and the output to maximum load and no-load jump for continuous operation.

5. Power waveform test

Simulate voltage inputs such as spikes, burrs and harmonics, test the performance and parameters of the power supply, and check the Q & A of components.

6. Voltage test

Test a variety of operating overvoltage to see the impact of Overvoltage on the equipment.

7. High and low temperature test

Because the performance parameters of components are abnormal under the condition of high and low temperature, the hidden dangers of products can be exposed after long-time testing.

8. Insulation strength test

Increase the value based on the insulation strength of the product, and conduct continuous test to obtain the limit value and abnormal conditions.

9. Anti interference test

Using EFT, the anti-interference voltage can be set to different levels of voltage for continuous impact anti-interference test.

10. Input low voltage test

Test whether the continuous low-voltage input of the power supply module, under voltage for a long time, affects the performance parameters of the power supply, etc.

Different designs and different uses will affect the reliability of the module. Customers should not only pay attention to the parameters of the power supply.

Handling process of power module reliability test report

1. Business consultation: the applicant provides product data, pictures and test requirements to Chuangxin for testing;

2. Project quotation: according to the information provided by the applicant, the engineer makes an evaluation, determines the items to be tested, and makes an oral quotation to the applicant;

3. Provide information: After accepting the oral quotation, the applicant shall fill in the test application form and submit it to the environmental testing authority for testing together with the test samples;

4. Payment: Send a written quotation to the applicant after receiving the application form and samples, and the applicant will arrange payment according to the written quotation;

5. Sample test: conduct product test according to applicable standards or customer requirements;

6. Issue the test report: the test report is issued by the laboratory after the test is completed;

7. Mailing report: after the project is completed, the report will be mailed and the case will be closed.

In short, the reliability of power supply will affect the reliability of equipment to a great extent, so the reliability test of power supply has become the premise of all parameters and performance guarantee.