149 views Yuda Electronic (HK) Technology Co.,Limited. 2019-08-15
How to customize power adapter according to customer requirements
Power adapter features
1, small size, light weight, easy to carry out. The switching power adapter does not use a bulky power frequency transformer. Since the power dissipation on the switching MOS tube is greatly reduced, a large heat sink is omitted. For these two reasons, the switching power adapter is small in size and light in weight.
2. Low power consumption and high efficiency. In the switching power adapter circuit, the switching MOS tube is excited by the excitation signal, and the conversion speed is fast, and the frequency is generally above 50 kHz, This makes the power consumption of the switching MOS transistor small, the efficiency of the power supply can be greatly improved, and the efficiency can reach 90%.
3. The efficiency of filtering is greatly improved, so that the capacity and volume of the filter capacitor are greatly reduced. The operating frequency of the switching power adapter is basically working above 50 kHz. Under the same ripple output voltage, when the switching power supply is used, the capacity of the filter capacitor is only 1/500 to 1/1000 of the filter capacitor in the linear regulated power supply.
4. Wide voltage regulation range. The output voltage of the switching power adapter is regulated by the duty cycle of the excitation signal, and the change in the input signal voltage can be compensated by frequency modulation or widening. In this way, when the voltage of the power frequency grid changes greatly, it can still ensure a relatively stable output voltage. Therefore, the switching power supply adapter is regulated, so the switching power supply adapter has a wide voltage regulation range and the voltage regulation effect is very good. The switching regulator power supply not only has the advantage of wide voltage regulation range, but also has many methods for realizing voltage regulation. The designer can according to the requirements of practical applications, such as anti-surge soft start, anti-overvoltage, undervoltage, overheat, over Flow, short circuit, protection circuit. Flexible selection of various types of switching power supply integrated circuit chip solutions.
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