Electrical performance testing of dc-dc converter

DC/DC Converter is a common power converter in electronic devices, used to convert DC power supply to another DC voltage level. In modern electronic devices, DC/DC power supplies are widely used in fields such as communication equipment, computers, and industrial control equipment. To ensure the normal operation of DC/DC Converter, accurate evaluation of its electrical performance is crucial. This article will introduce the electrical performance testing methods and measurement principles of related parameters for DC/DC power supplies.

1、 Electrical performance parameters of DC/DC Converter

Output voltage accuracy: refers to the deviation between the output voltage of a DC/DC Converter and the set value. Generally expressed in percentage or millivolts.

Load adjustment rate: The rate of change in the output voltage of DC/DC Converter when the load changes. Usually expressed as a percentage, for example: 1%.

Output current accuracy: refers to the deviation between the output current of a DC/DC Converter and the set value. Generally expressed as a percentage.

Efficiency: The electrical energy conversion efficiency of a DC/DC Converter from the input end to the output end. Usually expressed as a percentage, such as 90%.

Output ripple: Refers to high-frequency noise in the output voltage or current of a DC/DC Converter. Usually expressed in millivolts or amperes.

Switching frequency: The operating frequency of DC/DC Converter switching components. Usually expressed in kHz or MHz

2、 Electrical performance testing methods for DC/DC power supplies

Output voltage accuracy test: Connect the output voltage of the DC/DC Converter to a standard voltage source, measure the waveform of the output voltage through an oscilloscope, and compare it with the standard voltage source to calculate the error percentage.

Load adjustment rate test: Measure the change rate of output voltage through an oscilloscope under the set load change and compare it with the set load adjustment rate.

Output current accuracy test: connect the output current of DC/DC Converter to the standard current source, measure the output current through a Ammeter, compare it with the standard current source, and calculate the error percentage.

Efficiency test: Calculate the efficiency of a DC/DC Converter by measuring the input voltage, output voltage, and output current.

Output ripple test: Connect the oscilloscope to the output terminal of the DC/DC Converter, and calculate the size of the ripple by measuring the waveform of the output voltage or current.

Switch frequency test: Measure the cycle time of switch components through an oscilloscope and calculate the switch frequency.

3、 Electrical Performance Evaluation and Optimization of DC/DC Power Supplies

Electrical performance evaluation: According to the above testing methods, test and evaluate the electrical performance parameters of DC/DC Converter. By comparing the test results with the requirements of the specifications, it can be determined whether the DC/DC Converter meets the design requirements.

Electrical performance optimization: For DC/DC power supplies with unsatisfactory performance, electrical performance can be improved by optimizing circuit design and component selection. For example, adopting higher precision components, adjusting feedback networks, and other measures to improve output accuracy; Adopting better filtering capacitors and inductors to reduce output ripple, etc.

The electrical performance testing of DC/DC Converter is an important step to ensure its normal operation and performance optimization. As a provider of modular on-board power solutions for new energy vehicles, Landworld will evaluate the quality and performance of DC/DC power supplies by testing parameters such as output voltage accuracy, load adjustment rate, output current accuracy, efficiency, output ripple, and switching frequency. In practical applications, circuit optimization and component selection are carried out based on test results to further improve the performance and stability of DC/DC power supplies.