Shagon tsayawa ɗaya don abubuwan lantarki TLV1117LV33DCYR SOT223 mai sarrafa guntu ic hadedde da'ira

Shagon tsayawa ɗaya don abubuwan lantarki TLV1117LV33DCYR SOT223 guntu mai sarrafa guntu ic hadedde da'ira Featured Hoto

taƙaitaccen bayanin:

Jerin TLV1117LV na ƙananan dropout(LDO) linearegulators shine ƙaramin sigar shigarwar lantarki na mashahurin mai sarrafa wutar lantarki na TLV1 117.
TLV1117LV wata na'ura ce mai ƙarancin ƙarfi wacce ke cinye sau 500 ƙananan ƙarfin halin yanzu fiye da na gargajiya 11 17 masu kula da wutar lantarki, yana sa na'urar ta dace da aikace-aikacen da ke ba da izinin ƙarancin jiran aiki.Iyalin TLV1117LV na LDOS suma suna da ƙarfi tare da 0 mA na kaya na yanzu: babu ƙaramin buƙatun buƙatu, yin na'urar kyakkyawan zaɓi don aikace-aikacen inda mai sarrafa kayan aiki yana ɗaukar ƙananan lodi yayin jiran aiki ban da manyan igiyoyin ruwa akan tsari na 1 A yayin aikin nomaoperation.TLV1117LV yana ba da kyakkyawan layi kuma yana ɗaukar aiki na wucin gadi, wanda ke haifar da ƙarancin ƙarancin ƙarfi da haɓaka ƙarfin fitarwa lokacin da buƙatu na yanzu ya canza daga ƙasa da 1 MA zuwa sama da 500 mA.

Aika mana imel Zazzage Kwanan wata

Cikakken Bayani

Tags samfurin

Madaidaicin bandgap da amplifier kuskure yana ba da daidaiton 1.5%.Matsakaicin ƙin yarda da samar da wutar lantarki (PSRR) yana ba da damar amfani da na'urar don ƙaddamarwa bayan mai sarrafa sauyawa.Sauran fasalulluka masu kima sun haɗa da ƙaramar amo da ƙaramar ɗigon ruwa.
Ana biyan na'urar a ciki don ta kasance mai ƙarfi tare da 0-Ω daidai gwargwado juriya (ESR) capacitors.Waɗannan mahimman fa'idodin suna ba da damar yin amfani da ƙimar yumbu mai ƙarancin ƙima, ƙaramin girman yumbu.Ana iya amfani da capacitors masu fa'ida mai tsada waɗanda ke da ƙarfin ƙarfin son rai kuma ana iya amfani da ƙarancin zafin jiki idan ana so Ana samun jerin TLV1117LV a cikin fakitin SOT-223.

Halayen Samfur

TYPE	BAYANI
Kashi	Haɗin kai (ICs) PMIC - Masu Gudanar da Wutar Lantarki - Layi
Mfr	Texas Instruments
Jerin	-
Kunshin	Tape & Reel (TR) Yanke Tape (CT) Digi-Reel®
SPQ
Matsayin samfur	Mai aiki
Kanfigareshan fitarwa	M
Nau'in fitarwa	Kafaffen
Adadin Masu Gudanarwa	1
Wutar lantarki - Input (Max)	5.5V
Voltage - Fitarwa (min / Kafaffen)	3.3V
Wutar lantarki - Fitarwa (Max)	-
Fitar da wutar lantarki (Max)	1.3V @ 800mA
Yanzu - Fitowa	1A
Yanzu - Quiescent (Iq)	100 µA
PSRR	75dB (120Hz)
Siffofin sarrafawa	-
Siffofin Kariya	Sama da Yanzu, Sama da Zazzabi
Yanayin Aiki	-40°C ~ 125°C
Nau'in hawa	Dutsen Surface
Kunshin / Case	TO-261-4, ZUWA-261AA
Kunshin Na'urar Mai bayarwa	SOT-223-4
Lambar Samfurin Tushen	Saukewa: TLV1117

Mai sarrafa LDO?

LDO, ko ƙaramin mai sarrafa dropout, ƙaramin madaidaicin layi ne.Wannan yana da alaƙa da mai sarrafa layi na gargajiya.Masu tsara layin layi na gargajiya, irin su 78XX jerin kwakwalwan kwamfuta, suna buƙatar ƙarfin shigarwar ya zama aƙalla 2V ~ 3V sama da ƙarfin fitarwa, in ba haka ba, ba za su yi aiki da kyau ba.Amma a wasu lokuta, irin wannan yanayin yana da tsanani sosai, kamar 5V zuwa 3.3V, bambancin ƙarfin lantarki tsakanin shigarwa da fitarwa shine kawai 1.7v, wanda bai dace da yanayin aiki na masu kula da layi na gargajiya ba.Dangane da wannan yanayin, masana'antun guntu sun haɓaka kwakwalwan kwamfuta masu juyawa irin na LDO.
LDO shine mai sarrafa layin layi wanda ke amfani da transistor ko bututu mai tasirin filin (FET) da ke aiki a yankin saturation don samar da ingantaccen ƙarfin fitarwa ta hanyar cire wuce haddi daga wutar lantarkin aikace-aikacen.Ƙarfin fitar da wutar lantarki shine ƙaramin bambanci tsakanin ƙarfin shigarwa da ƙarfin fitarwa da ake buƙata don mai sarrafawa don kula da ƙarfin fitarwa tsakanin 100mV sama ko ƙasa da ƙimar sa.Ingantattun ƙarfin wutar lantarki na LDO (ƙananan faduwa) masu gudanarwa yawanci suna amfani da transistor wuta (wanda kuma aka sani da na'urar canja wuri) azaman PNP.Ana barin wannan transistor ya cika don haka mai sarrafa zai iya samun ƙarancin ƙarancin wutar lantarki, yawanci kusan 200mV;Idan aka kwatanta, masu kula da layin layi na al'ada masu amfani da NPN masu haɗa wutar lantarki suna da raguwar kusan 2V.LDO mara kyau yana amfani da NPN azaman na'urar isar da saƙo kuma yana aiki a cikin irin wannan yanayin zuwa na'urar PNP na ingantaccen fitarwa LDO.

Sabbin ci gaba suna amfani da transistor wutar lantarki na MOS, waɗanda ke da ikon samar da mafi ƙarancin wutar lantarki.Tare da MOS mai wutar lantarki, ƙarancin wutar lantarki ta hanyar mai sarrafawa yana haifar da juriya na ON na na'urar samar da wutar lantarki.Idan nauyin yana ƙarami, raguwar ƙarfin lantarkin da aka samar ta wannan hanya shine kawai 'yan dubun millivolts.
DC-DC na nufin DC zuwa DC (canza dabi'un DC daban-daban) kuma duk na'urar da ta dace da wannan ma'anar ana iya kiranta da DC-DC Converter, gami da LDOs, amma ma'anar kalmar ita ce kiran na'urori inda ake samun DC zuwa DC ta hanyar canzawa. .
LDO yana nufin ƙarancin wutar lantarki, wanda aka bayyana a cikin sakin layi ɗaya: Ƙananan farashi, ƙaramar hayaniya, da ƙarancin ƙarancin halin yanzu na ƙaramin dropout (LDO) mai daidaita layi shine fitattun fa'idodinsa.Hakanan yana buƙatar ƴan abubuwan haɗin waje, yawanci ɗaya ko biyu kawai capacitors kewaye.Sabbin masu kula da layin LDO na iya cimma waɗannan ƙayyadaddun bayanai: fitarwar amo na 30μV, PSRR na 60dB, da quiescent halin yanzu na 6μA (TI's TPS78001 ya cimma Iq = 0.5uA), da raguwar ƙarfin lantarki na 100mV kawai (LDOs da aka samar da yawa tare da da'awar). 0.1mV).Babban dalilin da yasa masu kula da layin LDO zasu iya cimma wannan matakin aikin shine cewa bututun mai sarrafawa a cikinsu shine MOSFET ta tashar P, yayin da masu sarrafa layi na yau da kullun suna amfani da transistor PNP.MOSFET tashar P-tashar wutar lantarki ce kuma baya buƙatar halin yanzu, don haka yana rage yawan abin da na'urar ke amfani da ita sosai;A gefe guda kuma, a cikin da'irori tare da transistor PNP, hana PNP A gefe guda, a cikin da'irori tare da PNP transistor, raguwar ƙarfin lantarki tsakanin shigarwa da fitarwa ba dole ba ne ya yi ƙasa sosai don hana PNP transistor daga saturating da rage yawan fitarwa;Juyin wutar lantarki a fadin MOSFET ta tashar P ya kusan daidai da samfurin abin da ake fitarwa a halin yanzu da kuma kan juriya.Tun da kan-juriya na MOSFET yana da ƙanƙanta, raguwar ƙarfin lantarki a cikinsa yana da ƙasa sosai.

Idan ƙarfin shigarwa da fitarwa suna kusa sosai, yana da kyau a yi amfani da mai sarrafa LDO, wanda zai iya samun inganci sosai.Don haka, ana amfani da masu sarrafa LDO galibi a aikace-aikace inda aka canza ƙarfin baturi na lithium-ion zuwa ƙarfin fitarwa na 3V.Ko da yake ba a yi amfani da makamashin baturi zuwa kashi goma na ƙarshe, mai kula da LDO zai iya tabbatar da tsawon lokacin aiki na baturi tare da ƙaramar amo.
Idan na'urar shigarwa da fitarwa ba su kusa sosai ba, ya kamata a yi la'akari da DCDC mai sauyawa domin, kamar yadda ake iya gani daga ƙa'idar da ke sama, shigar da LDO ɗin yana daidai da abin da ake fitarwa, kuma idan raguwar ƙarfin lantarki ya yi girma sosai. makamashin da ake cinyewa a cikin LDO yana da girma da yawa kuma ba shi da inganci sosai.
Masu canza DC-DC sun haɗa da mataki-sama, mataki-saukar, mataki-sama/ƙasa, da kuma jujjuyawar da'irori.Abubuwan da ake amfani da su na masu canza DC-DC suna da inganci sosai, da kuma ikon fitar da manyan igiyoyi da ƙananan igiyoyin ruwa.Tare da haɓaka haɗin kai, yawancin sabbin masu canza DC-DC suna buƙatar ƴan inductor na waje kawai da masu tacewa.Duk da haka, fitarwar bugun jini da jujjuyawar hayaniyar waɗannan masu sarrafa wutar lantarki suna da yawa kuma farashin yana da girma.
A cikin 'yan shekarun nan, tare da haɓaka fasaha na semiconductor, masu samar da wutar lantarki na sama, capacitors, da kwakwalwan kwamfuta masu sarrafa wutar lantarki sosai sun zama ƙarami da ƙananan farashi.Misali, don shigar da wutar lantarki na 3V, ana iya samun fitowar 5V/2A ta amfani da NFET akan guntu.Abu na biyu, don ƙananan aikace-aikacen wutar lantarki, ƙananan farashi, ƙananan fakiti za a iya amfani da su.Bugu da ƙari, idan an ƙara mitar sauyawa zuwa 1MHz, yana yiwuwa a rage farashi da amfani da ƙananan inductor da capacitors.Wasu sabbin na'urori kuma suna ƙara sabbin abubuwa da yawa kamar farawa mai laushi, iyakancewa na yanzu, PFM, ko zaɓin yanayin PWM.
Gabaɗaya, zaɓin DCDC don haɓaka dole ne.Don tsabar kuɗi, zaɓin DCDC ko LDO kwatance ne dangane da farashi, inganci, hayaniya, da aiki.

Mabuɗin bambance-bambance

LDO wani ƙaramin iko ne mai ƙaramin iko wanda yawanci yana da ƙaramar ƙarar amo da babban ƙimar Ƙimar Samar da Wuta (PSRR).
LDO wani sabon ƙarni ne na haɗakar da masu sarrafa da'ira, wanda ya bambanta da gwaji a cikin cewa LDO ƙaramin tsari ne akan guntu (SoC) tare da ƙarancin cin kai.Ana iya amfani da shi don sarrafa babban tashar ta yanzu, guntu ya haɗa MOSFETs tare da ƙarancin in-line akan juriya, Schottky diodes, resistors samfur, masu rarraba wutar lantarki, da sauran da'irori na hardware, kuma yana da kariya ta yau da kullun, yawan zafin jiki. PG sabon ƙarni ne na LDO, tare da kowace fitarwa jihar gwajin kai, jinkirin aikin samar da wutar lantarki, kuma ana iya kiransa Power Good, watau "ikon mai kyau ko kwanciyar hankali" .

tsari da ka'ida

Tsarin da ka'idar aiki.
Tsarin LDO low dropout mikakke mai kayyade yafi hada da farawa-up da'irar, m halin yanzu tushen son rai naúrar, ba da damar kewaye, daidaitawa aka gyara, tunani tushen, kuskure amplifier, a feedback resistor cibiyar sadarwa, kariya kewaye, da dai sauransu Ainihin aiki ka'idar ne. kamar haka: tsarin yana da ƙarfi, idan fil ɗin kunnawa yana cikin babban matakin, kewayawa ya fara farawa, da'ira na yau da kullun na yau da kullun yana ba da ra'ayi ga duka kewaye, kuma ƙarfin wutar lantarki yana da sauri ya kafu, fitowar ta ci gaba da tashi. tare da shigarwar lokacin da fitarwa ke gab da kai ga ƙayyadaddun ƙima, ƙarfin haɓakar fitarwar da aka samu ta hanyar hanyar sadarwa shima yana kusa da ƙimar ƙarfin lantarki, a wannan lokacin amplifier ɗin kuskure zai fitar da ƙarfin amsawa da ƙarfin magana tsakanin ƙaramin ƙarami. Ana ƙara siginar kuskure, sannan kuma ƙara ta hanyar bututun daidaitawa zuwa fitarwa, don haka samar da ra'ayi mara kyau don tabbatar da cewa ƙarfin fitarwa ya tsaya tsayin daka a ƙayyadaddun ƙimar.Hakazalika, idan ƙarfin shigarwar ya canza ko fitarwa na yanzu ya canza, wannan rufaffiyar madauki zai kiyaye ƙarfin fitarwa ba canzawa.