Huizhou (HK) Yingyuan Technology
137-2371-6834 Timber (WhatsApp)
Switching power supplies are an indispensable part of electronic devices, but the noise generated during their operation has caused a lot of trouble for users. Noise not only affects people's mood, but may also have adverse effects on other components of electronic devices. Therefore, how to reduce the noise of switching power supplies has become an important issue that electronic engineers need to face.Firstly, we need to understand the sources of switching power supply noise. The noise in switching power supplies mainly comes from the high-speed switching action of switching tubes and the vibration of components such as inductors and capacitors. When the switching tube switches quickly, the current will suddenly change direction, causing a magnetic field change in the inductance, thereby causing noise. In addition, capacitors can also generate vibration and noise during the charging and discharging process.To reduce the noise of switching power supplies, we can start from the follow...
2024
Power supply noise refers to the fluctuation of voltage or current caused by various factors in the power circuit. This fluctuation not only has a negative impact on the stability and performance of electronic devices, but may also pose a threat to the safety of the devices. The generation of power supply noise can be mainly attributed to the following three aspects:1. Quality issues with the power supply itselfThe design and manufacturing quality of the power supply itself is an important factor in the generation of power supply noise. For example, if the filtering circuit inside the power supply is not designed properly or the quality of the components is not up to standard, it may lead to high-frequency harmonic components in the output voltage or current of the power supply, resulting in noise. In addition, the mismatch between the rated power and load of the power supply may also lead to the generation of noise. When the load of the power supply changes significantly, the output...
Switching power supplies play a crucial role in modern electronic devices, and the choice of their operating frequency not only affects the performance of the power supply itself, but is also closely related to the stability and efficiency of the entire system. So, when choosing a switching power supply, what factors are we based on to determine its operating frequency?1. Efficiency and thermal designThe efficiency of switch mode power supplies is often directly related to their operating frequency. High frequency switching power supplies typically use smaller transformers and capacitors, which reduce their volume and weight, but may also result in higher switching losses. Although low-frequency switching power supplies have lower switching losses, the volume and weight of the filters and transformers they use may be larger. Therefore, when selecting the operating frequency, it is necessary to comprehensively consider efficiency and thermal design to ensure that the power supply can o...
A rectifier load is an electronic component that converts AC electrical energy into DC electrical energy, while a nonlinear rectifier load is a special type of rectifier load, and its relationship between current and voltage is not linear. So, how does nonlinear rectifier load work? This article will provide a detailed introduction to its working principle, characteristics, and applications.1. Working principleThe core of nonlinear rectifier loads is rectifier diodes. A rectifier diode is an electronic component with unidirectional conductivity that only allows current to flow in one direction. When the forward voltage acts on the rectifier diode, it will conduct and the current can pass smoothly; When the reverse voltage acts on the rectifier diode, it will cut off and current cannot pass through.By utilizing the unidirectional conductivity of rectifying diodes, we can convert alternating current into direct current. Specifically, when the positive half cycle of alternating current i...
The relationship between charger voltage and currentWhen choosing a charger, we usually focus on two parameters: voltage and current. Voltage refers to the potential energy transmitted by electrical energy in a circuit, measured in volts (V); Current refers to the number of electrons transferred by electrical energy in a circuit, measured in amperes (A). The product of voltage and current is the power, measured in watts (W).Most electronic devices have a charger voltage of 5 volts or 9 volts, and the current is usually between 1 and 2.4 amperes. This means that if the voltage of two chargers is the same but the current is different, they may be interchangeable, but attention should be paid to whether the charging time and charger power are compatible.The impact of chargers with different powers on devicesThe power of the charger varies, which can affect the charging speed of the device. For example, when you choose a 1-ampere charger to charge your phone, it can only deliver a 1-amper...