Some thoughts on DCDC converters What is a DC/DC converter? What is DC (Direct Current)? It refers to a DC power supply, such as a dry cell or a car battery. The 100V power supply for home use is an AC power supply (AC). If a DC voltage (3.0V) can be converted into another DC voltage (1.5V or 5.0V) through a converter, this converter is called a DC/DC converter or a switching power supply or a switching regulator. A DC/DC converter is generally composed of a control chip, an inductor, a diode, a transistor, and a capacitor. A DC/DC converter is a voltage converter that effectively outputs a fixed voltage after converting the input voltage. DC/DC converters are divided into three categories: boost DC/DC converters, buck DC/DC converters, and buck-boost DC/DC converters. Three types of control can be used according to demand. The PWM control type has high efficiency and good output voltage ripple and noise. The PFM control type has the advantage of low power consumption even when used for a long time, especially when the load is small. The PWM/PFM conversion type implements PFM control when the load is small, and automatically switches to PWM control when the load is heavy. Currently, DC-DC converters are widely used in products such as mobile phones, MP3s, digital cameras, and portable media players.
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