The difference between N-channel MOS tube and P-channel MOS tube helps manufacturers to better choose packaging MOS tube manufacturers!

The difference between N-channel MOS tube and P-channel MOS tube helps manufacturers to better choose packaged MOS tube manufacturers!

　　

　　I think circuit design designers have considered a question when choosing MOS transistors. Should they choose P-channel MOS transistors or N-channel MOS transistors? As a manufacturer, you must want your products to be able to compete with other businesses at a lower price, and you also need to repeatedly choose. How to choose? MOS tube manufacturers with 30 years of experience will share with you.

　　

　　 Guanhua Albert MOS tube

　　

　　 difference one: conduction characteristics

　　

　　 The characteristics of N-channel MOS, Vgs is greater than a certain value, it will be turned on, suitable for the case when the source is grounded (low-side drive), as long as the gate voltage reaches 4V or 10V. The characteristics of PMOS, Vgs is less than a certain value will be turned on, suitable for the situation when the source is connected to VCC (high-side drive).

　　

　　 Difference 2: MOS switch tube loss

　　

　　 Regardless of whether it is an N-channel MOS or a P-channel MOS, there is an on-resistance after it is turned on, so that the current will consume energy on this resistance. This part of the energy consumed is called conduction loss. Choosing a MOS tube with a small on-resistance will reduce the conduction loss, and the on-resistance of current low-power MOS tubes is generally around tens of milliohms, but also a few milliohms. In addition, when the MOS is turned on and off, it must not be completed instantaneously. This is a falling process, and the current flowing there is also a rising process.

　　

　　 During this time, the loss of the MOS tube is the product of voltage and current, called switching loss. Usually the switching loss is much larger than the conduction loss, and the higher the switching frequency, the greater the loss. The product of the voltage and current at the moment of turn-on is large, and the loss caused is also large. Therefore, shorten the switching time and reduce the loss during each turn-on; reducing the switching frequency can reduce the number of switching times per unit time.

　　

　　Package MOS tube

　　

　　 Difference 3: MOS tube use

　　

　　P-channel MOS tube has a low hole mobility, so when the geometric size of the MOS tube is equal to the absolute value of the working voltage, the transconductance of the PMOS tube is smaller than that of the N-channel MOS tube. In addition, the absolute value of the threshold voltage of the P-channel MOS tube is relatively high, requiring a higher operating voltage. Because of the large logic swing, long charging and discharging process, and small transconductance of the device, PMOS has a lower operating speed. After the emergence of N-channel MOS transistors, most of them have been replaced by NMOS transistors. However, due to the simple process and low price of P-channel MOS tubes, some medium-scale and small-scale digital control circuits still use PMOS circuit technology.

　　

　　Okay, today the sharing of packaged MOS tube manufacturers comes to mind. For more information, you can find us on the official website of Guanhua Albert. Guanhua Weiye has been focusing on MOS tube for 15 years and its headquarter is located in Shenzhen. Mainly engaged in high current field effect tube, high power MOS tube, large package MOS tube, low voltage MOS tube, small package MOS tube, low current MOS tube, MOS field effect tube, package MOS tube, power MOS, MOS tube package, MOS Tube original, packaged MOSFET, etc. The main agent product WINSOK (Wei Shuo).