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ڣ2019-08-20  


OӋҼLT1083/LT1033 ϵдʵ͉˷оƬĸ߷ȵͼyֱԴB˽VԷLC ͨVҪģKyԇYԴݔ늉ȸߡݔ󡢵ͼy͹ĵc

ԷԴV춿Сӡ僡Vҕl䡢ͨŵI Ǵ󌣸ߵԺУҵM·оɻȱăxO䡣ǂyԷԴ׃DQЧʵ͡оƬ󡢞V·Ƶȱc rFݔyЧʵ͡lgӵؽoϵyӟ•Ȇ}ښvOӋِУ ¶ëŮɫͼ,5,www.66aaaa.comڱِ؜yԇ ָyԇ؜yur ·ͻȻָ_ԭˮƽĬFrаl ҼҪԭǜyuṩķԴ늉Ӵ󡢹ؓ늉ƥ䡣ˣ ߷ԡͼyķԴǿЄºOӋِɻȱıϡ

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  • 1 ϵywOӋ

    OӋɽģKVģKԷģK͵ͨVģKMɣ D1 ʾ׃220 V/50 Hz 늷քe16 V6 V+6 V, ͨ^ԼݞVᣬ M ؓ ԷģK ٽ^ͨVģKVֱĎ֔_̖ քeݔ15 V5 V+5 V ķ늉This design is composed of step-down module, rectifier filter module, linear voltage regulator module and low-pass filter module, as shown in figure 1. The transformer reduces the ac voltage of 220v / 50hz to 16v, 6v and + 6v respectively, and enters the positive (negative) linear voltage stabilizing module after the rectifier bridge rectifier and large-capacity capacitance filtering, and then filters the interference signals other than dc through the low-pass filtering module, and outputs the stable voltage of 15v, 5v and + 5v respectively.

    2 ҪģK

    2.1 VģK
    V·ҪѺʹVݽMɣ D2 ʾѾweСɡݔ󡢰bȃݣ Kܴ4 ֻOܽMɵĂyʽ·V·ô늽ݞVݔ늉ķԡʽ1 V

    ݔ늉5 V2 A rR=U/I=2.5 Ω ˕rC= kT/2R =20 000 μF,Уk=5 .͉Umax≥√2Ui≈24.038 V.УUi=17 V, Umaxȡֵ25 V.늽C6 ɶˁK“Ҽ0.01 μF ĴƬC10 ЧƸl֔_

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  • 2.2 ԷģK
    LT1083/LT1033 ϵؓ{Чʴ춬Fṩ7.5 A5 A 3 A ݔKڵ1 V ĉl\Уl±C1.5 V ԃȡؓdpСrSͬrpС¶ëŮɫͼ,5,www.66aaaa.comڶNˮƽlͨ^Ƭ·ṩCСK܉ʹݔ늉ʴ_{1%.늉{ʞ0.015%,ؓd{ʞ0.01%,ֵҲM޶ȵ؜pС^dl·Դ·ϳܵđПṦƱo[10].LT1083/LT1033 ϵ_cʽ˷ݣcOӋе10 μF ݔԼPNP _10%ݔoBIJͬLT1083/LT1033 ϵеoBؓd 󽵵ԴġоƬ늉{Сؓd{Сc܉Cݔ늉ȸߡؓԷģK·D3 ʾR1=R3,R2=R4.·е腢ɸݔ{늉ʽ_

    УUref=1.25 V,IADJ=50 μA,R1=200 Ω

    2.3 ͨVģK
    ͨV·LC V· Vݞ4 700 μF늽ݺ0.01 μF Ƭݣ Чpֱļy͸l֔_ ɂ33 μH/3A 늸ЁK“ԸxKݔֹlʣ

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  • УL=33 μH,C=4 700 μF, D4 ͨV·D

    3 Դܜyԇ

    yԇxù̾4 λ딵fñGDM-8245 ϺۃxAS2294D {׃TDGC -0.5/0.5 .ؓdˮ裨2.5Ω/20 W5Ω/20 W15Ω/20 W .Դ܅1 ʾԿ ؓd{ʺ늉{ʷӳԴ^ߵķȣ yϵָ˷ӳͼyԡTest equipment using solid weft four and a half digital multimeter (GDM - 8245), Shanghai love ac millivoltmeter (AS2294D) and the regulating transformer (TDGC - 0.5/0.5). The load resistance using cement resistance (2.5, 5 / 20 W / 20 W, 15 / 20 W). The power performance parameters are shown in table 1. It can be seen that the load regulation rate and voltage regulation rate reflect the high stability of the power supply, and the ripple coefficient index reflects the low ripple characteristic.

    4 Y

    yԴ늉ӴЧʵ͡weȱcӰӮaƷĸָˡOӋԴHи߷ԡͼyăc ݔ늉{늉СؓdweСɡ¶ëŮɫͼ,5,www.66aaaa.comOӋԴзdzС늉{ʣ ҼOú늉 ʹ늾Wӣ ԴҲܱCݔ늉cO늉ͬ ΢̖͸l̖̎ṩıϣ HЧرӸِyur춸QԴµƷָ½¼l ҌӾ·ĸоʮҪx

     


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