Nā kumu a me ka pale ʻana i ka hemahema MOSFET

ʻO nā kumu nui ʻeluaof MOSFET hāʻule:

Voltage hāʻule: ʻo ia hoʻi, ʻoi aku ka mana BVdss ma waena o ke kahawai a me ke kumu ma mua o ka volta helu o kaMOSFET a hiki kekahi mana, e hoʻopau ai ka MOSFET.

ʻAʻole i hāʻule ka ʻīpuka: Ua loaʻa ka ʻīpuka i kahi puʻupuʻu uila maʻamau, ka hopena i ka hāʻule ʻana o ka ʻīpuka oxygen layer.

Nā kumu a me ka pale ʻana i ka hemahema MOSFET

ʻO ka hewa hāʻule (voltage hāʻule)

He aha ka pōʻino o ka avalanche? ʻO ka ʻōlelo maʻalahi,he MOSFET He ʻano hana ʻole i hana ʻia e ka superposition ma waena o nā volta kaʻa, nā volta hoʻohālikelike transformer, nā leakage spike voltages, a me ka MOSFET. I ka pōkole, he hana maʻamau ia i ka wā i ʻoi aku ai ka volta ma ke kumu punawai o kahi MOSFET ma mua o kona kumukūʻai uila i ʻōlelo ʻia a hiki i kahi palena o ka ikehu.

Nā hana e pale ai i ka pōʻino o ka avalanche:

- E ho'ēmi i ka dosage kūpono. Ma kēia ʻoihana, hoʻemi pinepine ʻia e 80-95%. E koho ma muli o nā ʻōlelo hoʻokō o ka hui a me nā mea nui o ka laina.

-Maikaʻi ka voltage Reflective.

-RCD, TVS absorption circuit hoʻolālā kūpono.

-ʻO nā wili o kēia manawa e like me ka nui e hiki ai ke hōʻemi i ka inductance parasitic.

-E koho i ke kuʻekuʻe puka kūpono Rg.

-Hoʻohui i ka RC damping a i ʻole Zener diode absorption no nā lako mana kiʻekiʻe inā pono.

Nā kumu a me ka pale ʻana o MOSFET hāʻule (1)

ʻAʻole i hāʻule ka ʻīpuka

ʻEkolu kumu nui o nā voltage mānoanoa kiʻekiʻe ʻole: ka uila static i ka wā o ka hana ʻana, ka lawe ʻana a me ka hui; resonance voltage kiʻekiʻe i hana ʻia e nā ʻāpana parasitic o nā mea hana a me nā kaapuni i ka wā o ka ʻōnaehana mana; a me ka hoʻouna ʻana i ka uila kiʻekiʻe ma o ka Ggd i ka mākia i ka wā o nā haʻalulu uila kiʻekiʻe (he hewa i maʻamau i ka wā o ka hoʻāʻo ʻana i ka uila).

Nā hana e pale ai i nā hemahema o ka puka makani:

ʻO ka pale overvoltage ma waena o ka puka a me ke kumu: Ke kiʻekiʻe loa ka impedance ma waena o ka ʻīpuka a me ke kumu, ua hui pū ʻia ka hoʻololi koke ʻana o ka volta ma waena o ka ʻīpuka a me ke kumu i ka puka ma o ka capacitance ma waena o nā electrodes, e hopena i kahi kiʻekiʻe UGS voltage over-regulation, e alakaʻi ana i ka hoʻoponopono ʻana i ka puka. Poino oxidative mau. Inā aia ka UGS i ka volta transient maikaʻi, hiki i ka mea hana ke hana hewa. Ma kēia kumu, pono e hoʻemi ʻia ka impedance o ke kaʻa kaʻa kaʻa ʻīpuka a pono e hoʻopili ʻia kahi pale pale a i ʻole 20V stabilizing voltage ma waena o ka puka a me ke kumu. Pono e mālama pono i ka pale ʻana i ka hana puka hāmama.

ʻO ka pale o ka overvoltage ma waena o nā paipu hoʻokuʻu: Inā loaʻa kahi inductor i ke kaapuni, hoʻololi koke i ka leakage au (di/dt) i ka wā e pio ai ka ʻāpana e hopena i ka leakage voltage overshoots ma luna o ka uila hāʻawi, e hōʻino i ka ʻāpana. Pono e hoʻopaʻa ʻia i kahi pale ʻo Zener, RC clamp, a i ʻole RC suppression circuit.