BYH31012A_AF4920NSLA Introduction

The MOS tube is a voltage-driven device. As long as an appropriate voltage is applied between the gate G and the source S, the conduction path between the source S and D will be formed. As the switch tube of the driving part, the main focus of the MOS tube is the withstand voltage, current withstand value and switching speed.

The power mos used on electric vehicles is a three-dimensional structure. The mos tube we have seen is actually composed of thousands of small mos tubes in parallel. You may think that one or a few bad moss should easily appear in thousands of small mos. In fact, it is not that easy. , the current manufacturing process basically guarantees the high consistency of various parameters of these small units. Low-power mos is a planar structure.

BYH31012A_AF4920NSLA

UT8205AL-P08-R

BYS3105 BYP3105 BYJ31020A BYH31012A BYJ31012A BYP3104 BYF31010A BYP31013A BYS31010A BYH31055 .

Barrier capacitance: In power semiconductors, when the N-type and P-type semiconductors are combined, the electrons of the N-type semiconductor will partially diffuse into the holes of the P-type semiconductor due to the concentration difference, so they will form on both sides of the junction surface. Space charge area (the electric field formed by the space charge area will resist the diffusion movement, and finally make the diffusion movement reach equilibrium);

Power MOSFETs are generally rarely used in P-channel. Since the mobility of holes is lower than that of electrons, the on-resistance of P-channel transistors is larger than that of N-channel transistors for the same channel size. . According to the two points of the conductive channel and the process of channel formation, MOS tubes can be divided into: P-channel enhancement MOS tubes, P-channel depletion MOS tubes, N-channel enhancement MOS tubes and N-channel depletion MOS tubes . Figure four types of MOSFETs and their graphical symbols.

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BYH31012A_AF4920NSLA

HM4884A

Another technique is to intermittently improve the structure of the MOSFET and use a straight V-groove structure. In order to avoid the problems of too small current-carrying capacity and large on-resistance of MOSFET, two techniques are generally used in high-power MOSFETs. One is to connect millions of low-power MOSFET unit cells in parallel to improve the current-carrying capacity of MOSFET. . FIG. 3 is a cross-sectional view of the structure of a V-channel MOSFET.

Diffusion capacitance: When a forward voltage is applied, the non-equilibrium minority carrier concentration near the interface of the depletion layer is high, far from the non-equilibrium minority carrier concentration is low, and the concentration gradually decays from high to 0 until it reaches zero. The process of charge accumulation and release in this phenomenon is the same as that of capacitor charging and discharging, which is called diffusion capacitance. When the applied forward voltage increases, the concentration of unbalanced minority carriers increases and the concentration gradient also increases, and when the applied voltage decreases, the change is opposite.

For example, electronic fuel injection system, anti-lock brake control, anti-skid control, traction control, electronically controlled suspension, electronically controlled automatic transmission, electronic power steering, etc. The electronic device that can be used independently in the environment has no direct relationship with the performance of the car itself. .

BYM4610 BYM4640 BYM4875 BYM81080 BYM81095 BYM826 BYM8311 BYM8315 BYH8415 BYM8415.

BYH31012A_AF4920NSLA

NCE20ND06 NCE2008N NCE2312 NCE2312A NCE8205A.

The performance parameters of NCE3401 are still good, suitable for load switching or pulse width modulation applications, and the impedance value is relatively low, and the new clean energy MOS tube has the characteristic process technology of shielded gate power and super junction power MOSFET. The parameter performance and sample delivery performance can be almost the same as foreign MOS tubes, such as the same used in lithium battery protection boards, NCE3401, AO3401, IRLML5203TR, DMP3098L-7, I think the functions can be satisfied in comparison, and the price is moderate NCE3401 is more suitable.

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