O(sh)ӋһNͨͻɏV(yng)ڽ׃l(q)Դ_P(gun)ԴgԴI(lng)ԓͨͻͨ^黯扻Ԫzyͨa(chn)Ĵň^ЧؙzyyڻԪa(chn)Ļ늄ݺ߀^ʧ{(dio)늉ˌ늉ķŴ͌λ늄ݵaԓO(sh)ӋăɂҪҪQĆ}һԪdӝȵSض׃׃߀Üضa·ضa
1 ϵy(tng)O(sh)Ӌ
ϵy(tng)֞4֣1)ԪĹ·늉(zhn)((zhn))оƬƬṩ2)ԪоБ(yng)ƬБ(yng)Ĵň(ԓňͨa(chn))D(zhun)늉3)Ŵ·Ļ늉M(jn)зŴ4)˴ƽԭһ(c)a(chn)Ĵňͨ^ξȦM(jn)aʹоʼK̎ͨB(ti)ϵy(tng)̈DD1ʾ
2 ϵy(tng)Ӳ·O(sh)Ӌ
ϵy(tng)±5 Vķ(wn)ԴһƬ늉(zhn)оƬREF3012黯ϵеĻԪHW300Bṩ(zhn)늉HW300Bһɲ늉ģʽ늺ģʽ늵ĻԪHW300B_К϶ļŭh(hun)Ě϶zˮԹ̶(Ԫͼŭh(hun)λl(f)׃Ӱ푮a(chn)Ļ늄ݵĴС)ԪݔxŴAD620ŴIJģ˺ģݔŴͨ^{(dio)(ji)18_֮g10 kλ׃ŴݔӷȦԓȦ@ڼŭh(hun)ϣ@ʹͨ^a(chn)Ĵňcŭh(hun)ռĴň෴Ȧĩ˷175 kľӵͨ^yɶ˵늉Ӌ㷴ȦеM(jn)㴩^ŭh(hun)ĵıyĴСw·DD2ʾ
2.1 REF3012
SOT23-3bREF3012һ߾ȡ늉늉ϵоƬREF3012Сߴ͵(50A)dzmڱyʽ늳عҪؓ(f)dκؓ(f)dܷ(wn)ͻԪܜضȵӰ푣ԲúԴԜpСضϵ(sh)ԓϵy(tng)O(sh)ӋREF3012ݔ_1+5 VԴ10F·ԓ·ԴM(jn)ОVԴ(wn)ݔ_2ӵHW300B_1Ҳ1O F·GND()_3ӵϵy(tng)O(sh)ӋҪREF3012HW300Bṩ2.5 VĻ(zhn)늉(j)REF3012Ĕ(sh)(j)YϿ֪(dng)ݔ늉5 Vrݔ늉2.5 VREF3012_1+5 V늉
2.2 Ԫ
O(sh)Ӌ黯ϵеHW300BͻԪݔ늉122204mVݔ롢ݔ迹240550 a늉-77 mVضϵ(sh)-1.8%ݔɲ늉ģʽҲɲģʽ@늉ģʽ늣HW300B_13ݔ_24늉ݔ
ԪnjňD(zhun)Q̖ľԴԪݔ늉
ʽУS˷e`mV(mT.mA)Ic鹤mABŸБ(yng)ȣmT
O(sh)ӋԪM(jn)_К϶ļŭh(hun)Ě϶Ԫͼŭh(hun)̶@ӿԸБ(yng)(wn)Ļ늄ʽ(1)(dng)ScIcһtVhcBֱӾP(gun)ϵͨ늌(do)w܇Ȼa(chn)ň(j)ඨcňP(gun)ϵʽ
BdI=0I0ã
ʽ0մŌ(do)
(j)·ɵõ@N·ʽcňP(gun)ϵ
ʽ(6)֪(j)Ԫij˷e`SIcմŌ(do)ʦ0yI0p@є(sh)N1϶Ll2Ӌ늉Vhҿ֪϶Ll2ԽС늉VhԽԚ϶(yng)ԄÿסԪˡ
2.3 Ŵ·
ɴԪŭh(hun)ռĴňD(zhun)Q̖ݔһ늉茦M(jn)зŴ@AD620̓xŴͨ^׃׃Ŵ(sh)(11000)AD62018_֮gͨ^1ֻ10 kλ1ֻ75 {(dio)Ŵ(sh)Ҫ׃Ŵ(sh){(dio)(ji)λAD620_74քe+5 V-5 VĹ늉ҷքe0.01 F·ÁVɷʹݔֱƽ_32քeӻԪ_24_6ݔŴ늉ֵӷȦ_5Dž(zhn)REF3012_3ϵy(tng)ĵؽ
xŴ·3ŴͬMɣRRGҪڷŴʹ÷(ni)(110k)(j)̶R{(dio)Ŵ(sh)P(gun)ϵʽ£(ҪעÿŴͬF(xin)Ŵݔ늉乤늉±Vc)AD620ݔ늉Vocݔ늉V1V2P(gun)ϵʽʽ(7)ʾ
2010ИI(y)ǽ(jng)(j)ȫ(f)Kһ҂һζ^ȥһИI(y)ļg(sh)c