Pūnaha tiaki matatau i roto i te rihi maha-tauranga
Kei te piki haere te rongonui o ngā rihi maha-tauranga i roto i ngā kāinga, i ngā tari, tae atu ki ngā wāhi tūmatanui. E kiia ana he watea te urutau kotahi me ngā tauranga USB-A me/ranei USB-C maha nā te mea ka taea te utu i ngā waea, ngā papa, ngā pona, ngā taringa taringa, ngā mataarataki atamai, tae atu ki ngā pēke hiko i te wā kotahi. Engari kei muri i taua watea kei reira te uaua hangarau kāore e kitea: te tohatoha atamai i te hiko, te pupuri i te pumau o te ngaohiko, me te tiaki i ngā taputapu hono mai i ngā momo mōrearea hiko. Koinei te wāhi e whai wāhi nui ai ngā pūnaha tiaki matatau. Ka matapakihia e tēnei tuhinga ngā momo tiaki e whakamahia whānuitia ana ki ngā rihi maha-tauranga hou, me pēhea te mahi, me ngā mea me aro atu ngā kaiwhakamahi ina whiriwhiri ana i tētahi hua.
He aha i hiahia ai ngā rihi maha-tauranga ki te tiakitanga pakari ake?
He rerekē ki ngā rihi tauranga kotahi, me whakahaere e ngā rihi tauranga maha ngā āhuatanga maha i te wā kotahi: ngā taputapu he rerekē ngā hiahia hiko, ngā taura he rerekē te kounga, te whiriwhiringa kawa utu tere, me ngā huringa ohorere o te kawenga ka puta ina monohia, ina momotuhia rānei ngā taputapu. Ina utuhia ngā taputapu e rua, e toru rānei i te wā kotahi, ka piki ake te iahiko katoa, ā, ka kaha ake te mahi a ngā wāhanga o roto. Ki te kore he parenga tika, ka pāngia te rihi me ngā taputapu e ngā mōrearea pēnei i te wera nui, te poto o ngā taura, te ngaru hiko, te tohatoha hiko kore pumau rānei.
Ehara te tiakitanga o te rihi i te āhuatanga "tāpiri" noa iho; he wāhanga matua o te hoahoa haumaru. I te nuinga o te wā, e rua ngā take matua e arohia ana e te hoahoa tiakitanga pai: te haumaru o te kaiwhakamahi (te ārai i te ahi/te ru hiko) me te haumaru o te taputapu (te ārai i te kino o te pākahiko, te IC utu, te tauranga rānei).
1) Te Parenga o te Iahiko Nui (OCP) – te parenga o te iahiko nui
Mā te OCP ka whakarite kia kore te putanga o te iahiko mai i te tauranga e neke atu i ngā rohe haumaru. Ka taea e te iahiko te piki ake nā ētahi āhuatanga, pērā i te taura kua pakaru, te hononga paru, te taputapu rānei e ngana ana ki te kukume i te hiko ki tua atu i te kaha o te tauranga. I runga i ngā rihi maha-tauranga, e rua ngā taumata o te mahi a te OCP:
– OCP mō ia tauranga: he rohenga iahiko motuhake tō ia tauranga. Mēnā ka rahua tētahi taputapu, ka momotuhia taua tauranga, ka whakaitihia rānei tōna mana me te kore e whakaweto i ngā tauranga kē atu.
– OCP Katoa: ka whakawhāiti i te iahiko katoa mai i ngā tauranga katoa hei tiaki i te urutau matua me ngā wāhanga hurihanga hiko.
Ka taea te whakatinanatanga hei ātete ine iahiko ka pānuihia e te kaiwhakahaere, kātahi ka whakaitihia e te kaiwhakahaere te huringa mahi i roto i te ara whakawhiti, ka tapahia rānei te ara hiko.
2) Te Parenga Ngaohiko Nui (OVP) – te parenga ngaohiko nui
Ka tiakina e te OVP ngā taputapu mai i ngā ngaohiko putanga tino teitei. He mea nui rawa tēnei mō ngā taputapu Tuku Mana USB-C (PD) nā te mea ka taea te whiriwhiri i te ngaohiko (5V, 9V, 12V, 15V, 20V, me ngā rerekētanga PPS). Ka taea e ngā hapa whakahaere, ngā rahunga wāhanga, ngā raruraru rangitahi rānei te mea ka nui ake te ngaohiko i ngā whakaritenga o te taputapu.
Mā te rihi pai ka:
– te aroturuki i te ngaohiko putanga i te wā tūturu,
– whakamutua te tuku hiko, whakaitihia rānei te ngaohiko mēnā ka hipa i te paepae,
– whakahohea te whakaweto i raro i ētahi tikanga (ka whakawetohia te tauranga kia momotu rā anō te taura).
Ko te tikanga, ka āwhinahia tēnei parenga e tētahi IC kaiwhakahaere PD me tētahi ara iahiko whakataurite OVP tere.
3) Te Parenga Porowhita Poto (SCP) – te parenga porowhita poto
Ko te SCP tētahi o ngā parenga tino taketake engari he mea nui. Ka puta pea ngā ara iahiko poto nā:
– ngā taura kua tihorea,
– te putanga whakauru o te mea kawe hiko,
– te hononga kua pakaru,
– te wai, te waikura rānei.
Ina puta he poto hiko, ka piki te iahiko i roto i te wā poto, ka wera pea ngā wāhanga, ka pakaru hoki. Ko te tikanga, ka tapahia e ngā rihi maha-tauranga te putanga i roto i ngā mirihekona i muri i te kitenga i te poto hiko, kātahi ka ngana ki te whakaora i ia wā, ka tatari rānei kia momotu te taura e te kaiwhakamahi.
4) Te Parenga i te Pāmahana Nui (OTP) – te parenga i te pāmahana nui
Ko te hoariri matua o ngā hikohiko mana ko te wera. I roto i ngā rihi maha-tauranga, ko ngā pūtake matua o te wera e ahu mai ana i:
– te tahuritanga AC-DC auau teitei,
– te tiritiri mana i te wā kotahi,
– te kounga o ngā wāhanga (MOSFET, inductor, transformer),
– te hoahoa o te hauhautanga me te anga.
Ka whakamahia e te OTP tētahi pūoko pāmahana (NTC/thermistor, pūoko IC ā-roto rānei) hei:
– whakaitihia te mana mā te āta haere (whakaiti i te wera),
– ka whakaweto i te putanga mēnā ka nui ake te pāmahana i te rohe,
– ka ārai i te pirau o ngā wāhanga mō te wā roa.
Kāore te rihi pai me te OTP e "kati noa ina wera," engari ka taea hoki te whakaiti i te putanga kia haumaru, kia pumau hoki.
5) Te parenga ngaru me te taupua (Te parenga ngaru/taupua)
Kāore te whatunga hiko e ma i ngā wā katoa. Tērā pea ka puta he ngaru hiko poto nā:
– te uira (tika, te uira rānei),
– ngā kawenga whakapūmau (hauhautanga, pouaka whakamātao, papu),
– te kounga tāutanga ngoikore.
Ko ngā rihi kounga teitei e whakamahi ana i ngā wāhanga pēnei i te Metal Oxide Varistor (MOV) i te taha whakauru AC me ētahi atu ara iahiko mimiti-ngaru hei whakaiti i ngā ngaohiko tihi. I te taha putanga, ka taea te whakamahi i te diode TVS, i te kaupapa tiaki ESD rānei hei ātete i ngā whakawhiti i roto i te tauranga USB, inā koa ka pā te kaiwhakamahi ki te hononga i roto i te taiao maroke.
6) Te tiakitanga ESD – he ārai-patū mō ngā tauranga me ngā kaiwhakahaere
Ka taea e te Tukunga Hiko Pūmau (ESD) te kino i ngā IC whakahaere, inā koa i ngā tauranga USB-C e kawe ana i ngā raina whakawhitiwhiti kōrero (CC, raraunga, me ētahi wā SBU). Ko te tiakitanga ESD he tikanga kei roto he huinga diode e "hurihuri" ana i ngā ngaru pūmau ki te whenua i mua i te taenga atu ki ngā ara iahiko tairongo. He mea nui tēnei i roto i te whakamahinga o ia rā, pērā i te mono i te taura i muri i te hikoi i runga i ngā papa whāriki, i roto rānei i tētahi rūma hauhautanga.
7) Te tiakitanga whakawhitiwhiti kōrero USB-C PD me te whakahaere whiriwhiringa hiko
Ka whakahaerehia e ngā rihi maha-tauranga o ēnei rā he "kōrero" matihiko me te taputapu. Mā te USB-C PD, ka whiriwhiria e te rihi me te taputapu te ngaohiko/au. He arorau ake te pūnaha tiaki i konei:
– Whakamana kōtaha hiko: ka whakaratohia e te rihi ngā kōtaha anake e tutuki ana i te paerewa.
– Te whakahaere hapa: mēnā he raruraru te whakawhitiwhiti PD, ka hoki te rihi ki te 5V taunoa.
– Mana whakahaere PPS: I roto i te PPS (Programmable Power Supply), ka taea e te ngaohiko te huri haere i roto i ngā pikinga iti. Me pupuri e te rihi ngā huringa i roto i ngā rohe haumaru hei ārai i te nui rawa.
Mena he maha ngā tauranga PD o te rihi, me āhei te kaiwhakahaere ki te ārai i ngā taupatupatu, me te whakarite hoki ka whiwhi ia tauranga i te tohatoha hiko haumaru.
8) Te Tiritiri Mana Hihiri – te tiritiri mana haumaru
Koinei te āhuatanga tino kitea o te whakamahinga maha-tauranga: ina tāpirihia he taputapu hou, ka rerekē pea te whakamahinga hiko o ētahi atu tauranga. Me whai whakaaro te pūnaha tohatoha hiko pai ki:
– te tapeke o te mana o te urutau (hei tauira, 65W, 100W),
– te kaupapa matua o ētahi tauranga (he maha ngā wā ka whakaritea te tauranga USB-C matua),
– ngā whakaritenga taputapu (rorohiko me te waea pūkoro),
– ka ārai i te "hekenga" o te ngaohiko mō te wā poto.
Ka whakamahia e ētahi rihi te tohatoha tūmau (hei tauira, "C1 65W, C2 20W, A 18W"), ko ngā mea matatau ake ka whakamahia te mana whakahaere hihiri me te aroturuki kawenga. Ka mahi tahi te tiakitanga me te whakahaere mana hei ārai i te nui rawa o te iahiko o te tauranga me te pupuri i te pāmahana. Ka kitea te kounga o te whakatinanatanga i roto i te pumau o te rihi i te wā e mono ana, e momotu ana rānei i ngā taputapu: ka whakaitihia e ngā rihi pai te hononga anō, ā, kāore e puta he "matenga" auau.
9) Te wehenga taha AC me te tiaki haumaru (tuatahi-tuarua)
Me mau tonu te wehewehe o ngā rihi AC-DC i waenga i te taha ngaohiko teitei (AC 220V) me te taha putanga USB (ngaohiko iti). Kei roto i te hoahoa tiaki:
– he whakawhiti hiko me te whakamarumaru e tika ana,
– te tawhiti ngoki me te ātea i runga i te PCB,
– te optocoupler me te mana whakahaere urupare haumaru,
– te whakawhāiti i te fiusi me te iahiko tomo.
Ahakoa kāore e kitea e te kaiwhakamahi, he mea tino nui tēnei āhuatanga hei whakatau mēnā he haumaru te rihi mō te whakamahinga roa.
10) Ngā tohu kounga tiwhikete me te tiakitanga
He huarahi whai hua hei aromatawai i tētahi pūnaha tiaki ko te rapu i te tutuki i ngā paerewa me te ōritetanga o ngā whakaritenga. Ētahi mea hei whakaaroaro:
– Tiwhikete haumaru: SNI (mō te mākete Initonīhia), IEC/EN 62368-1, UL, TUV, ētahi atu tiwhikete ā-rohe rānei.
– Tautoko kawa: USB-IF mō te PD (kei hea te rārangi), me ngā whakaahuatanga mārama o te kōtaha mana.
– Ngā whakatakotoranga putanga mārama: ka whakamāramahia te tohatoha mana mō ia tauranga, tae atu ki te whakamahinga o ngā tauranga katoa.
– Ngā arotake o te ingoa o te kaihanga me ngā whakamātautau hangarau: he maha ngā wā ka whakaatuhia e ngā whakamātautau pāmahana me te pumau o te putanga te kounga o te tiakitanga.
He mea nui kia maumahara ko te tapanga "utu tere" me te whakatauranga mana nui ehara i te mea he pūnaha tiaki pai rawa atu. I ētahi wā ka taea e ngā rihi utu iti te whakanui ake i ngā taumata mana nui, ā, ka nui ake ngā pūoko pāmahana, ngā wāhanga tiaki ngaru, te tiaki motuhake rānei mō ia tauranga.
Ngā tikanga whakamahi mō te tiakitanga tino pai
Kua hangaia ngā pūnaha tiaki hei ārai haumaru, ehara i te mea hei whakakapi mō ngā tikanga haumaru. Mā ētahi mahi māmā noa iho ka āwhina:
1. Whakamahia he taura kounga teitei me te iahiko e tika ana (ina koa ko te USB-C 3A/5A mō te wattage teitei).
2. Kaua e hipokina te rihi ki te kakahu, kaua hoki e waiho ki tētahi wāhi whaiti ina utua ana ngā taputapu maha.
3. Momotuhia te mono mēnā he tino wera te taputapu/hononga, he haunga kaha rānei.
4. Āta karohia ngā kōhao wetekina me ngā toronga mekameka ina utaina ana te hiko kaha nui.
5. Mō ngā pona rorohiko, whakamahia ngā tauranga me ngā taura e tautoko ana i te PD e ai ki ngā whakaritenga wattage.
Te Katinga
He tino māmā noa iho ngā taputapu utu maha-tauranga, engari he maha ngā pūnaha whakahaere me te tiaki hiko kei roto. Ka mahi tahi te OCP, OVP, SCP, OTP, tiaki ngaru hiko, ESD, whakahaere whiriwhiringa PD USB-C, me te tiritiri hiko hihiri hei whakarite kia tere, kia pumau, kia haumaru hoki te utu. I te wā e whiriwhiri ana i tētahi utu maha-tauranga, kaua e whakaarohia te maha o ngā tauranga me te wattage anake, engari me te kounga o te tiakitanga hoki—nā te mea, ehara i te utu tere noa te utu pai; engari ko te tiaki i ō taputapu utu nui mai i ngā tūponotanga hiko o ia rā.
