BYM3615_UPA1870GR Introduction

The core of power semiconductors is the PN junction. From diodes, triodes to field effect transistors, various applications are made according to the characteristics of the PN junction. Field effect transistors are divided into junction type and insulated gate type, among which the insulated gate type is also called MOS tube (Metal Oxide Semiconductor). According to whether the inversion layer exists in the case of no electricity, MOS tubes can be divided into enhancement type and depletion type.

VentureCraft is a pioneering company in this area, leading the development of high-resolution portable amplifiers, music players and headphone amplifiers, including the popular SounDroid Vantam product line. . Although high-resolution technology is only just getting started in the audio market, its evolution is already underway.

BYM3615_UPA1870GR

BYS36580A

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The reason is that the on-resistance is small and it is easy to manufacture. Therefore, in the application of switching power supply and motor drive, NMOS is generally used.

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MOS tube 3306 product features 1. RDS(on)=7mΩ@VGS=10V 2. Lead-free green equipment 3. Low resistance switch to reduce conduction loss 4. High avalanche current.

BYM3615_UPA1870GR

SP8K3-TB

The N-channel enhancement mode MOS transistor uses a low-doped P-type semiconductor as the substrate, and forms two heavily doped N+ regions on the substrate by a dispersed method, and then generates a very thin one on the P-type semiconductor. A silicon dioxide insulating layer, and then photolithography is used to etch away the silicon dioxide layer on the upper end of the two heavily doped N+ regions, exposing the N+ regions, and finally on the outer surface of the two N+ regions and the two between them. The surface of silicon oxide is sprayed with a layer of metal film by evaporation or sputtering. These three metal films constitute the three electrodes of the MOS tube, which are called source (S), gate (G) and drain (D) respectively. .

The parasitic capacitance structure of the MOS tube is as follows. Among them, the width of polysilicon, the width of the channel and the trench, the thickness of the G oxide layer, and the doping profile of the PN junction are all factors that affect the parasitic capacitance. .

BYM4610 BYM4640 BYM4875 BYM81080 BYM81095 BYM826 BYM8311 BYM8315 BYH8415 BYM8415.

. The characteristics of a MOSFET can be characterized by a transfer characteristic curve and a drain output characteristic curve. Figure 3 shows the handling characteristics of a certain FET. The transfer characteristic refers to the relationship curve between the gate voltage UGS and the corresponding drain current ID when the voltage UDS between the drain and the source is at a certain fixed value.

BYM3615_UPA1870GR

NCE2302D NCE2302F NCE1012E NCE2302B NCE2302.

In the lithium battery protection board, the most important thing is to protect the chip and MOS tube.

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