The module power supply is widely used in various fields such as switching equipment, access equipment, mobile communication, microwave communication, and optical transmission, routers and other communication fields as well as automotive electronics, aerospace and life. In order to ensure the safety and reliability of the module power supply, the power module is inseparable from the complete test. Complete testing of AC-DC, DC-DC power modules often includes boot time, shutdown time, rise time, fall time test. Test systems, such as the ITECH ITS9500 power test system, can be tested in a complete and efficient manner. If you do not use a test system, how can you use a DC power supply + DC electronic load to simply test the on/off time and rise/fall times of the DC-DC power supply module?
ITECH IT85150/IT85300 series electronic load provides innovative time measurement function, which can conveniently and quickly test the power on time and rise time, and has a very wide range of applications in the power supply industry.
Power-on time test
Turn On Time (Turn On TIme): The time from when the input voltage starts to supply power to the power supply output voltage to the required voltage value Va, as shown in the figure above.
Test Methods:
(1) Startup test: Select the trigger source for the start test as external trigger. You can use our IT6500C/D series DC power supply or IT7600 series AC power supply as the DC/AC input of the power supply under test, and provide the synchronization signal to the load through the analog interface. When the load receives the TRI signal, start the test;
(2) end of the test: select the end of the test trigger source for the level of triggering, the trigger level is set to Va, when the power supply to be measured when the output voltage reaches Va, stop the test;
(3) The load calculates the time difference between the two trigger signals, which is the power-on time of the power supply to be tested.
1 test chart
2 IT6500C/D analog interface
Power rise time test
The difference between the power rise time and the boot time, rise time (Rise TIme): the voltage never rises to a stable period of time (usually measuring the upper and lower output voltage is 10% to 90% or 5% to 95%), as above As shown in the figure, Va is 10% of the output voltage, Vb is 90% of the output voltage, and the time between Va and Vb is the startup voltage rise time.
Test Methods:
(1) Start-up test: Select the trigger source for the start-up test to be level-triggered, and set the trigger level to Va. When the output voltage of the power supply under test reaches Va, start the test.
(2) end of the test: select the end of the test trigger source for the level of triggering, the trigger level is set to Vb, when the power supply to be measured output voltage reaches Vb, stop the test;
(3) Load Calculate the time difference between the two trigger signals, which is the rise time of the power supply under test.
A similar method can test the power module shutdown time and fall time. Simple power supply, load construction, without software control, can complete the traditional test project of the test system. Of course, if you need to perform a complete module power test, such as hybrid effect test, voltage limit test, power off test, etc., you also need ITECH9500 power test system, you can test the DC-DC module, you can also test AC-DC Modules, test automation, modular construction, easy system expansion, suitable for batch testing of factory production lines.
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