By Zhanyou Sha, Xiaojun Wang, Yanpeng Wang, Hongtao Ma
A modern assessment of switching strength layout tools with genuine international applications
• Written via a number one writer well known in his field
• makes a speciality of switching strength offer layout, manufacture and debugging
• Switching strength provides have relevance for modern functions together with cellular phone chargers, laptops and PCs
• in accordance with the authors' profitable "Switching strength Optimized layout 2d variation" (in Chinese)
• hugely illustrated with layout examples of genuine global purposes
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Additional resources for Optimal design of switching power supply
It is a closed-loop control system with only one voltage feedback loop (or voltage control loop) and simple circuit design. 2. It can work stably in the process of modulation. 3. With low output impedance, it allows power to be supplied through multiple channels to a load. The cons of VMC-type SMPS are as follows: 1. Laggard response. Although the current sense resistor RS is used in the VMC-type circuit, RS is not connected to the control loop. As a result, when the input voltage changes, the pulse width can be modulated only after the output voltage changes as well.
2. It can work stably in the process of modulation. 3. With low output impedance, it allows power to be supplied through multiple channels to a load. The cons of VMC-type SMPS are as follows: 1. Laggard response. Although the current sense resistor RS is used in the VMC-type circuit, RS is not connected to the control loop. As a result, when the input voltage changes, the pulse width can be modulated only after the output voltage changes as well. Owing to lag time in the filter circuit, the changes of output voltage can only be seen after multiple cycles.
If there is a cycle skipping, and the rest cycles will be powered off by the maximum current limitation point, which means that the voltage input is high voltage; the adaptive limited current regulator circuit will reduce the maximum value ILIMIT (max) by 10%, so as to reduce the overload output power (PeakSwitch series products) ′ externally by changing the resistance value of Set the value of ILIMIT resistance set by the limited current Used to extend the conducting period of power MOSFET. As long as the current of primary side is less than ILIMIT , the adaptive switching cycle conducting time control circuit will keep the switching cycle conducted.