Lithium roj teeb them IC-LP3947

Lithium roj teeb uas them IC-LP3947 yog qhov ua kom zoo microprocessor, nws yog lub siab ua haujlwm ntawm ib leeg ntawm cov roj ntsha lithium roj teeb uas tau sib koom ua ke. Nws muaj cov khoom siv hluav taws xob tawm ncaj ncaj uas tuaj yeem txuas los ntawm USB sib txuas lossis AC lub zog txuas thiab cov teeb tsa ua ke. Nws tuaj yeem siv Hauv Anwen fais fab mov (LDO daim ntawv), cov zis tam sim no tuaj yeem ncav cuag 1A, lub roj teeb nrog lub zog ntawm 4.1V lossis 4.2V raug tso tseg, lub teeb hluav taws xob tas mus li thiab tas li, thiab lub roj teeb hluav taws xob dhau tuaj yeem ua ntej -tshuaj roj teeb, tsim cov roj teeb hluav taws xob tiv thaiv, roj teeb ntsuas kub dhau lawm Thaum nws qis lossis qis dhau lawm, lub xovtooj hluav taws xob txiav tawm, muaj lub sijhawm tiv thaiv kev ruaj ntseg 5.6 teev, kev tiv thaiv tam sim no thiab dhau-tshav kub, them cov xwm txheej qhia. , them tam sim no nrhiav kom tau, thiab tso tawm qhov hluav taws xob ib qho hluav taws xob uas yog ib feem ntawm lub tsub them tam sim no, thiab cov cuab yeej txuas hluav taws xob kub TJ yog nyob ntawm 0 ℃ ≤TJ≤85 ℃. Nyob rau hauv qhov ntsuas, qhov ua kom them tau yog nyob hauv 1%, qhov ntsuas qhov ntsuas voltage: 4.3V - 6.0V, thaum AC adapter tau siv, lub txim them tam sim no teev nplai yog 100mA-750mA, thaum lub chaw nres nkoj USB raug txuas, lub tsub them tam sim no kev teeb tsa qhov ntsuas tau yog 100- 500mA. Kev ua haujlwm kub: -40 ℃ —+85 ℃.

Daim duab qhia tau hais tias ib daim duab sib dhos ntawm lub pins. Cov IC tuaj yeem siv dav hauv cov xov tooj ntawm tes, cov koob yees duab digital, USB-powered IT khoom siv thiab cov cuab yeej ua haujlwm nqa los. Cov haujlwm ntawm txhua tus pin ntawm LP3947 tau piav qhia raws li hauv qab no:

Pin1 (EN): Lub txim nkag tau pab kom lub davhlau ya nyob twg, cov ntsiab lus siab tso cai rau them nqi, cov theem qis kom nres them.

Pin2 (SCL): I2C serial interface moos nkag lub davhlau ya nyob twg.

Pin3 (SDA): I2C serial interface cov ntaub ntawv tawm tswv yim / tawm davhlau ya nyob twg.

Pin4 (BATT): Lub roj teeb lub thawv nkag, lub davhlau ya nyob twg txuas nrog 10uF ceramic capacitor rau hauv av.

Pin5 (VT): 2.78V ruaj khov voltage tawm davhlau ya nyob twg, muaj hluav taws xob ruaj khov rau kev ntsuas roj teeb.

Pin6 (VBSENSE): lub roj teeb hluav taws xob nrhiav lub davhlau ya nyob twg, txuas nrog lub davhlau ya nyob twg zoo ntawm lub roj teeb.

Pin7 (MODE): Xaiv AC adapter lub zog muab hluav taws xob (teeb tsa siab), xaiv USB fais fab mov (teeb tsa qis).

Pin8 (Diff-Amp): tso tawm lub zog tso suab sib txawv uas pom tias lub tsub them tam sim no. Lub tso zis hluav taws xob yog sib npaug rau lub them tam sim no.

Pin9 (Ts): Ntau qhov haujlwm davhlau ya nyob twg, roj teeb kub nrhiav kom pom cov davhlau ya nyob twg, siv rau LDO daim ntawv / them cov roj teeb hluav taws xob cov khoom siv davhlau ya nyob twg, yog tias lub roj teeb tsis txuas, tsis yog roj teeb, nws yog LDO daim ntawv, siv qis qis tawm 4.1V lossis 4.2V tso zis hluav taws xob. Ntaus ntawv.

Pin10 (EOC): Sab hauv qhib-ntws cov zis. Thaum USB chaw nres nkoj lossis AC adapter txuas nrog thiab lub roj teeb puv lawm, lub davhlau ya nyob twg no tso tawm qis, thiab ib qho sab nraud LED tuaj yeem txuas nrog los qhia tias lub roj teeb puv.

Pin11 (GND): Qhov davhlau ya nyob twg.

Pin12 (CHG): Sab hauv qhib-ntws cov zis. Thaum USB chaw nres nkoj lossis AC adapter txuas, lub roj teeb pib them. Lub davhlau ya nyob twg tsim tawm qib qis, thiab ib qho sab nraud LED tuaj yeem txuas tau los qhia tias lub roj teeb tau pib them.

Pin13 (ISEL): Lub tsub roj teeb hluav taws xob txuas los ntawm USB chaw nres nkoj, lub davhlau ya nyob twg txuas nrog theem siab, qhov kev them tam sim no yog 100mA, lub davhlau ya nyob twg txuas nrog theem qis, thiab qhov them tam sim no yog 500mA (qhov them tam sim no tuaj yeem tsim rau lwm I2C cuam tshuam).

Pin14 (CHG-IN): Lub xov tooj hluav taws xob muab hluav taws xob xa khoom siv davhlau ya nyob twg, nkag mus rau cov hluav taws xob tsis txaus tswj nrog cov kev txwv tam sim no, thiab 1uF ceramic capacitor yuav tsum txuas nrog hauv av ntawm qhov chaw no.

Tus txheej txheem them nqi: lub xov tooj ntawm lub xov tooj hluav taws xob sib xyaw LP3947 yog qhia hauv daim duab 2. Cov txheej txheem them nyiaj thiab cov cim qhia txog kev them nyiaj muaj nyob hauv daim duab 3. Cov LED liab yog lub ntsuas hluav taws xob, thiab ntsuab LED yog qhov ntsuas phwj. Kev them nyiaj nres hluav taws xob nyob hauv daim duab yog 4.1V.

Lub charger txuas nrog AC adapter lossis USB fais fab mov, thiab lub charger pib ua haujlwm. Yog hais tias qhov ntsuas hluav taws xob nyob ntawm qhov pib tsis tshua muaj hluav taws xob (≥4.3V) thiab qhov ntsuas hluav taws xob ntau (≤6.0V), lub tshuab hluav taws xob pom qhov ntsuas hluav taws xob uas tsim nyog, thiab cov nqi ua ntej pib, liab LED yog nyob rau thiab ntsuab LED lawm.

Lub sijhawm them hluav taws xob nyob hauv theem ua ntej them yog nruab nrab ntawm 40-70mA, kom cov roj teeb hluav taws xob dhau los tuaj yeem tiv thaiv kev nyab xeeb nrog lub ntsuas hluav taws xob me me. Lub roj teeb hluav taws xob nce mus txog thaum lub roj teeb hluav taws xob nce siab tshaj 3.0V. Lub sijhawm them ua ntej theem xaus thiab lub sijhawm lav hluav taws xob pib. Pib them.

Lub sijhawm them hluav taws xob ntawm qhov kev them nyiaj ceev yog 100mA thaum ISEL davhlau ya nyob twg txuas nrog rau theem siab (USB hom), thiab thaum ISEL cov davhlau ya nyob txuas nrog theem qis, qhov tam sim no yog 500mA. Lub sijhawm no, yog tias AC adapter siv rau them, lub sijhawm them ceev ceev tau teeb tsa los ntawm tus neeg siv (100 -750mA) Qhov tseeb tam sim no ntawm kev them nyiaj ceev yog ± 20mA thaum ≤150mA, thiab ± 10% thaum ≥200mA. Thaum lub tshuab hluav taws xob ceev ceev kom txog 4.1V, qhov hloov hluav taws xob tas mus li tam sim no xaus, thiab nws hloov mus rau 4.1V qhov hluav taws xob tas mus li.

Thaum lub sijhawm hluav taws xob tas mus li lub sijhawm, lub sijhawm them hluav taws xob tsis hloov, tab sis lub sijhawm them tam sim no yuav maj mam poob kom txog thaum lub sijhawm them tam sim no poob mus rau ib theem, qhov kev them tas lawm, tam sim no lub teeb ntsuab ntsuab thiab liab LED tua. Yog tias qhov kev them hluav taws xob ceev tam sim no yog 1C, tus nres tsub hluav taws xob tam sim no tuaj yeem teeb tsa nws mus rau 0.1C, tom qab ntawd lub teeb hluav taws xob tas mus li poob rau 50mA, thiab lub txim tau nres. Thaum lub sijhawm them ceev ceev ntawm 100mA, lub sijhawm ua haujlwm tas sijhawm rau 5.6 teev thiab lub cim nres. Lub sijhawm no, ob qho LED coj los tau.

Tus them hluav taws xob tam sim no raug kuaj los ntawm IC' s sab hauv hluav taws xob sab hauv tam sim no. Diff-Amp tso tawm qhov hluav taws xob uas muaj feem sib luag rau cov kev them nqi tam sim no (tawm tswv yim mus rau ADC voltage ntawm microprocessor). Tom qab tswj tau los ntawm microprocessor, lub teeb liab nres lub teeb liab yog qhov tawm. Kev them nyiaj tam sim no ICHG thiab Diff- Cov kev sib raug zoo ntawm VDIFF ntawm Amp cov zis hluav taws xob yog:

ICHG=(VDIFF-0.497) /1.655

Nco tseg: Chav nyob hauv tus qauv: tam sim no yog A thiab voltage yog V.

Yog tias lub roj teeb tshem tawm tom qab lub roj teeb nres, nws yuav nkag mus rau tus txij nkawm. Thaum lub roj teeb hluav taws xob poob los ntawm 0.2V, qhov kev ntxiv roj teeb yuav raug ua, thiab lub roj teeb yuav tsum nres thaum lub roj teeb hluav taws xob nce mus txog 4.1V.