LINEAR TECHNOLOGY LT1913EMSE Step-Down Switching Regulator

Nga korero hua

Ingoa Hua	LT1913EMSE 3.5A, 25V Kaiwhakarite Whakawhiti Whakaheke-iho me te Tukutahi Mahi
Whakaahuatanga	Ko te taiawhio whakaaturanga 1316 he hikoi monolithic DC/DC te kaiwhakahaere whakawhiti e whakaatu ana i te LT1913. Ka taea e te LT1913 tukutahia i runga i te awhe 250 KHz ki te 2 MHz. Ko te poari demo i hangaia mo te putanga 5V mai i te 6.5V ki te 25V whakauru. Ko te whakauru whanui Ka taea e te awhe o te LT1913 te maha o nga puna whakauru. Ko te tikanga Ko nga puna ko nga pākahiko motuka, nga taputapu pakitara me nga umanga taonga.
Waitohu Rehita	Ko te LTC me te LT he tohu rehita o te Hangarau Raina Kaporeihana. Ko ThinSOT me PowerPath nga tohu tohu o Linear Hangarau Corporation.
Whakarāpopototanga Mahi	Voltage: 6.5v Whakauru Mōrahi Voltage: 25v Putanga Voltage PUTANGA: 5V +/- 4% Morahi Putanga Naianei: 3.5A Auautanga Whakawhiti Angamaheni: 800kHz

Nga Tohutohu Whakamahi Hua

1. 1. Whakanohoia a JP1 ki te turanga RUN.
   2. Ka mutu te hiko, honoa te tuku hiko whakauru ki a Vin me GND.
   3. Whakakāhia te hiko i te whakauru.
   4. Tirohia mo te putanga tika voltage.

Tuhipoka: Mena karekau he putanga, momotuhia te utaina mo te wa poto kia kore ai te utaina kia teitei rawa.

1. Kia te putanga tika voltage kua whakaritea, whakatikahia te kawenga i roto i te awhe mahi me te mataki i te vol putangatage ture, ripple voltage, kakama, me etahi atu tawhā.
2. Ka taea te taapiri i tetahi karaka o waho ki te titi SYNC ina whakamahia ana te mahi SYNC. Tirohia te waahanga tukutahi i roto i te papanga raraunga mo nga taipitopito.

Whakaahua 1. Te Tatūnga Taputapu Ine Tika

Whakaahua 2. Te Ine i te Whakauru, te Ripple Putanga ranei

Whakaahua 3. Ko te Raro o te Poari demo me te Taapiri Kōwhiringa me te Tapahia Aroturu Whakauru

WHAKAMAHI

Ko te ara iahiko Whakaaturanga 1316 he whakanekeneke monolithic DC/DC whakahuri kaiwhakahaere e whakaatu ana i te LT1913.
Ka taea te tukutahi i te LT1913 i runga i te awhe 250 KHz ki te 2 MHz. Kua hangaia te papa demo mo te putanga 5V mai i te 6.5V ki te 25V whakauru. Ko te whanui whakaurunga o te LT1913 ka taea te maha o nga puna whakauru. Ko nga punaa tikanga ko nga pākahiko miihini, nga taputapu pakitara me nga taonga ahumahi.

Ko te whiriwhiringa EMC tātari i te whakaurunga ka tukuna ki raro o te poari, ka tino whakaitihia te haruru EMI i te taha whakauru. Ka taea e nga kaihoko te whakamahi i tenei ara iahiko ma te tapahi i te tohu whakauru kei raro o te papa me te whakauru i nga waahanga. Ko te kaupapa mana aratau o naianei ka hanga i te whakautu tere tere me te pai o te pukoro.
Ko te puku o te kuaha o te whakawhiti o roto ka whakanuia ki te voltage he teitei ake i te Vin ki te whakarite waiwai o te pana. Ko te LT1913 o te diode whakanui whakahiato ka whakaiti i nga tatau waahanga. Ka taea te whakamahi i te titi RUN/SS ki te tautuhi i te waahanga ki te miihini miihini
aratau whakaweto, whakaiti i te naianei tuku ki te iti iho i te 1uA. Ka taea hoki te whakamahi i te titi RUN/SS ki te whakarite i te tiimata ngawari. I tenei aratau, ka peia te titi RUN/SS i roto i te tātari RC waho ki te hanga voltagēamp i runga i tenei titi. Ko te mahi ngawari o te tiimata ka whakaiti i te ngaru o naianei whakauru i te tiimatanga.

Ko nga papaaarangi LT1913 he whakamaarama katoa mo te waahanga, te mahi me nga korero tono.
Me panui te papaaarangi me tenei aratohu tiimata tere mo te ara iahiko demo 1316.

Tuhipoka: He pai ake te whakamau i te titi SYNC ki te kore te mahi SYNC e whakamahia ana.
Hoahoa files mo tenei poari ara iahiko e waatea ana.
Karangatia te wheketere LTC.

Whakarāpopototanga Mahinga mo te Kaiwhakarite Whakawhiti Whakawhiti (TA = 25oC)

PARAMETER MO NGA PAKA HE TUARUA	TE KAUPAPA	UARA
Voltage		6.5V
Whakauru Mōrahi Voltage		25V
Putanga Voltage VKI WAHO		5V +/- 4%
Morahi Putanga Naianei		3.5A
Auautanga Whakawhiti Angamaheni		800kHz

NGICK TIKANGATANGA KAUPAPA KAUPAPA

He ngawari te whakarite iahiko whakaaturanga 1316 hei arotake i te mahinga o te LT1913. Tirohia te Whakaahua 1 mo te tatūnga taputapu ine tika ka whai i nga tikanga i raro nei:

WHAKAARO. I te ine i te whakauru, te whakaputa voltage ripple, me tupato ki te karo i te mata whenua roa i runga i te oscilloscopeprobe. Inehia te whakaurunga, te whakaputanga voltage ripple ma te pa atu ki te pito rangahau puta noa i nga pito o Vin, Vout me GND. Tirohia te Whakaahua 2 mo te tikanga tirotiro whanui tika.

TOHUTOHU

1. Whakanohoia a JP1 ki te turanga RUN.
2. Ka mutu te hiko, honoa te tuku hiko whakauru ki a Vin me GND.
3. Whakakāhia te hiko i te whakauru.
4. Tirohia mo te putanga tika voltage.
   WHAKAARO. Mena karekau he putanga, momotuhia te utaina mo te wa poto kia kore ai te utaina kia teitei rawa.
5. Kia te putanga tika voltage kua whakaritea, whakatikahia te kawenga i roto i te awhe mahi me te mataki i te vol putangatage ture, ripple voltage, kakama me etahi atu tawhā.
6. Ka taea te taapiri i tetahi karaka o waho ki te titi SYNC ina whakamahia ana te mahi SYNC. Tirohia te waahanga tukutahi i roto i te papanga raraunga mo nga taipitopito.

FAKATOKANGA: KI TE KAUPAPA KAUPAPA

1. KATOA WHAKAARO KEI OHMS, 0402.
   KATOA KAUPAPA KEI MICROFARADS, 0402.
2. WHAKATOU TE WHAKAMAHI KI NGA PIN JP1 182.

Tuhinga / Rauemi

LINEAR TECHNOLOGY LT1913EMSE Step-Down Switching Regulator [pdf] Aratohu Kaiwhakamahi LT1913EMSE Kaiwhakarite Whakawhiti Whakawhiti Raro, LT1913EMSE, Kaiwhakarite Whakawhiti Whakawhiti Raro, Kaiwhakarite Whakawhiti, Kaiwhakarite

Tohutoro

• Pukapuka Kaiwhakamahi