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How to choose the right power adapter for yourself
Different instruments, equipment, and machines often use adapters with different voltages and currents. Therefore, when choosing a power adapter, the following issues need to be noted:
1. To improve the reliability of the system, it is recommended that the power adapter work at 50% -80% load, assuming a power of 20W, a power adapter with an output power of 25W-40W should be selected.
2. Try to use the manufacturer's standard power supply, including standard size and output voltage. This way, the delivery will be faster; On the contrary, special sizes and output voltages will increase development time and costs.
3. Clarify the input voltage range. Taking AC input as an example, commonly used input voltage specifications include 110V and 220V, so there are three corresponding specifications: 110V, 220V AC switching, and universal input voltage (AC: 85V-264V). The input voltage specification should be selected based on the usage region.
4. The power adapter consumes a portion of power during operation and releases it in the form of heat, so users should consider the heat dissipation of the power adapter in system design, especially for enclosed systems.
5. Based on usage, determine the required output voltage and current; The size, installation method, and installation hole position of the power supply; How many outputs are there, and do they need electrical isolation; Input voltage range; Determine the degree of derating and power output of the power adapter based on the ambient temperature; Whether certification and safety standards are required; Cooling method of power supply: natural cooling or forced air cooling; Electromagnetic compatibility standards.
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