Here are some common test methods:
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1. Voltage test: Use a multimeter or oscilloscope to test whether the input and output voltage of the chip is normal. Under normal working conditions, the input voltage should be within the specified range, and the output voltage should be stable near the set value.
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2. Current test: Use a multimeter or oscilloscope to test whether the output current of the chip is normal. Under normal working conditions, the output current should be stable in the range of specified values.
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3. Temperature test: Use the infrared thermal imager and other tools to test whether the temperature of the chip is normal. Under normal working conditions, the temperature of the chip should be within the specified range.
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4. Static test: Use a digital multimeter and other tools to test whether the resistance, capacitance and other parameters between each pin of the chip are normal.
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It should be noted that during the testing process, test according to the test conditions provided in the data manual, and strictly follow the relevant safety operation procedures to avoid damage to the chip or personal injury. If you do not have relevant testing experience or equipment, it is recommended to consult a professional technician for testing.
It can be tested by electronic testing equipment.
Specifically, measuring the quality of 7-pin switching power chip 8654 requires the use of a multimeter, which is connected to each pin of the chip for measurement, the voltage value and current value displayed by the multimeter can reflect the working status and quality of the chip.
In addition, the oscilloscope can also observe the output waveform of the chip to judge the quality of the chip. Because the output waveform of the chip is correct, it directly affects the normal operation of the entire circuit.
It should be noted that when measuring, it is necessary to operate according to the indicators in the chip specification book, and strictly follow the circuit operation process and safety specifications to avoid safety accidents caused by misoperation.
Using the oscilloscope to measure 8654 chip can judge its good or bad. Because the oscilloscope can detect voltage, current and its changes, if the measured data shows normal, that is, the voltage and current meet the standard, and there is no abnormal waveform, it can be considered that the 8654 chip is good.
On the other hand, if the voltage and current waveform is abnormal, then the chip may be damaged.
At the same time, it can also be disassembled to check whether there is physical damage or short circuit.
8654 chip is an IC chip widely used in power switches, and its normal working state is very important for power stability and to ensure electrical safety. Therefore, measuring the quality of 8654 chip is of great significance for the normal operation and reliability of electrical appliances.
1 The chip can be judged by testing whether the power supply is stable.
2 Since the main role of the pin switching power supply chip 8654 is to convert the input voltage of the power supply to the output voltage, it is necessary to test whether it can stabilize the output voltage.
Its stability can be judged by measuring the fluctuation of its input voltage and output voltage. If the output voltage fluctuation is too large or can not be output normally, it indicates that there is a problem with the chip.
At the same time, it can also be considered to test whether the output current of the external load meets the requirements, and to measure whether the working condition under the rated temperature is normal to further confirm its quality.
3 During the test, you need to pay attention to the impact of the test environment, such as the temperature of the chip to be tested, and the instruments and equipment used for testing.
If these factors are not effectively controlled and addressed, the test results may show errors.
Use a multimeter to measure 7-pin switching power chip 8654.
First you need to select the multimeter to resistance test mode, and then connect the test pen to the 7 pins and ground of the chip (that is, the large piece at the bottom of the chip).
If the multimeter displays an infinite value, the chip is broken.
If the value is small, the chip may be damaged or faulty.
Next, you can consider connecting the chip to the circuit board, and check whether the chip works properly through the circuit board.
If there is no problem with the chip, there may be problems with other components in the board that need further investigation.
By measuring the feedback voltage and output current, the 7-pin switching power supply chip 8654 is judged to work normally.
If the feedback voltage and output current are within the normal range, it indicates that the chip is working properly; If the feedback voltage or output current is too high or too low, the chip may be faulty or damaged.
At the same time, some other measurements can also be made, such as the measurement of input voltage, output voltage, temperature and other parameters, to obtain a more comprehensive chip working state.
The defects of the chip itself can also be eliminated by replacing the chip.
Measuring the quality of electronic components is an important part of electronic engineering, and it is necessary to master the relevant test methods and skills.
For the chip, it is also necessary to master the circuit connection and working principle of the chip in order to better measure and troubleshoot.
Through the tool measurement clear conclusion is feasible 8654 is a commonly used switching power supply chip, often used in the design of power modules.
If we want to measure whether the power chip is good or bad, we need to use a special tool, such as a multimeter.
Multimeter can be used to test the on-chip, voltage and other parameters, we can connect the test pin of the multimeter to the pin of the chip, and test the value of each pin one by one.
In this way, you can determine whether the chip is working properly.
If there is a significant difference in the test results, then the chip has failed. In short, the use of tools measurement is the correct way to measure the quality of 7-pin switching power chip 8654, multimeter is a commonly used measurement tool, can help us more accurately judge the work of the chip.
1 According to official information, the main function of 7-pin switching power chip 8654 is power management and protection control.
2 A variety of methods can be used to measure the quality, including testing the input\/output voltage, checking whether the overvoltage protection is normal, checking whether the short circuit protection is normal, etc.
3 For different test methods, different test tools need to be used, such as multimeters, oscilloscopes, etc.
At the same time, it is necessary to know the normal working status and parameter range of the chip before testing, so as to determine whether the test results meet the requirements.
In short, the correct test method and tool selection is the key to ensure accurate measurement of 7-pin switching power chip 8654.
1 It can be judged by measuring the stability of its output voltage.
2 Generally speaking, the voltage output stability is considered excellent if it can fluctuate within 1%.
If there is a large fluctuation in the output voltage, it is most likely because of the aging of the circuit in each part of the chip, which leads to problems in its conversion ability, indicating that the reliability of the chip has been reduced.
3 If you want to measure more rigorously, you can use an oscilloscope and load resistance, and follow the relevant steps to measure, so as to get more accurate measurement results.
1, first switch the multimeter function to AC voltage (manual 500V or 750V), to ensure that the input voltage is normal;
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2, and then switch the multimeter function switch to the DC voltage (manual switch according to the marked voltage is adjusted to a higher voltage unit), measure the output voltage, and the marked voltage can be considered to be good.
1 Test with a multimeter to determine the quality of the power chip.
2 Measure whether the positive and negative poles are energized, and whether the input and output voltages meet specifications. If they do not meet standards, it indicates that there is a problem with the power chip.
3 During the test, it is necessary to pay attention to whether the circuit connection is correct, and at the same time, it is also necessary to compare the specifications and data manuals of the power chip in order to more accurately judge the quality of the power chip.