LM317 mgbanwe ugbu a regulator

Atọ-ọnụ mgbanwe regulator LM317 enye ugbu a ibu nke 100 MA. mmepụta voltaji nso 1.2 na 37 V. The ngwaọrụ bụ mfe iji na-achọ naanị a ụzọ mpụga resistors na-enye mmepụta voltaji. Plus, akwusighi nke na-arụ ọrụ parameters nwere mma nhọrọ karịa tụnyere ụdị na a ofu ọkọnọ voltaji na mmepụta.

nkọwa

LM317 - voltaji na ugbu a stabilizer nke na ọrụ ọbụna mgbe ná mgbagwoju akara pin ADJ. Na nkịtị ọrụ, ngwaọrụ adịghị mkpa a ga-ejikọrọ na ọzọ capacitor. Isịneke e mere mgbe ngwaọrụ bụ na a bukwanu anya si isi ike ọkọnọ iyo. Na nke a, achọrọ nwụnye nke input uzo capacitor.

Na mmepụta nke analogue na-enye ohere iji melite arụmọrụ nke ugbu a regulator LM317. N'ihi ya, ụba osisi ike na-akwụsị akwụsị ripple uru nke smoothing ọnụọgụ. Dị otú ahụ ezigbo ọnụ ọgụgụ ike nweta ọzọ atọ ọnụ analogues.

Nzube nke ngwaọrụ n'okpuru echiche abụghị naanị nnọchi nke stabilizers na ofu mmepụta egosi, ma n'ihi na a dịgasị iche iche nke ngwa. Ka ihe atụ, LM317 ugbu regulator ike ga-eji na-elu-ike na sekit na sekit. Na nke a usoro onye unit-ekpebi ihe dị iche n'etiti ọsọ ọsọ na-mmepụta voltaji. Ọrụ nke ngwaọrụ nke a mode nwere ike ịnọgide na ruo mgbe ebighị ebi, ruo mgbe ihe dị iche n'etiti abụọ udu (ndenye na mmepụta voltaji) anaghị gafere karịa allowable ebe.

atụmatụ

Ọ bụ uru na-arịba ama na LM317 ugbu regulator adabara mfe mgbanwe usu ngwá. Ha nwere ike ji mee ka a nkenke stabilizer, site na njikọ ofu resistor n'etiti abụọ ndapụta.

Ịmepụta a abụọ ọkọnọ isi mmalite na-arụ ọrụ na-abụghị inogide mkpụmkpụ-na sekit na sekit, mere omume site optimizing voltaji egosi na akara usoro mmepụta. Ihe omume na-eme ya n'ọnụ ụzọ nso nke 1.2 volts, n'ihi na ọtụtụ ndị na ibu dị nnọọ obere. Na a ugbu a regulator LM317 voltaji transistor bụ na e mere a ọkọlọtọ TO-ọkpụkpụ 92 mode nke ọrụ okpomọkụ sitere na site -25 ka +125 degrees Celsius.

e ji mara

Anya ngwá zuru okè ruru eru maka imewe nke mfe nkanka na usoro ike onunu. The parameters nwere ike ịtọ ma gbazie na okwu nke ibu.

N'iru ugbu a na stabilizer LM317 nwere ndị na-esonụ e ji mara:

• Mmepụta voltaji nso - si 1.2 na 37 volts.
• The ibu ugbu a na kacha - 1.5 A.
• E nwere a nchedo obere sekit na sekit.
• E nwere fuuz circuit si ekpo oke ọkụ.
• The njehie na mmepụta voltaji bụ karịa 0,1%.
• The ụlọ IC mgbawa - ụdị TO-220, TO-3 ma ọ bụ D2PAK.

Na-akwọ ụgbọala ugbu stabilizer maka LM317

Dị ka mgbe ngwaọrụ na ajụjụ na-eji na ikanam ike onunu. Ọzọkwa ya ọnọde a mfe circuit nke resistor na mgbawa na-arụ ọrụ.

Na ndenye ike isi iyi voltaji na-ọnọ, na isi na kọntaktị na jikọọ na analọg mmepụta iji resistor. Ọzọkwa, aggregation emee na anode nke ikanam. The kasị ewu ewu ugbu a circuit LM317 stabilizer dị ka nke ahụ a kọwara n'elu, na-eji ndị na-esonụ usoro: R = 1/25 / I. Ebe m - bụ ngwaọrụ mmepụta ugbu a, ya nso dịgasị n'etiti 0, 01-1.5 A. Resistor kwere na nha 0, 8-120 ohms. Agamevu ike resistor na gbakọọ site usoro: R = IxR (2).

Ozi nwetara na-mechie. Ofu resistors emepụta na a obere mgbasa ikpeazụ eguzogide. Nke a na-emetụta na nnata nke ịkwụ ụgwọ egosi. Iji dozie nsogbu a, na atụmatụ, ihe ọzọ kwụsie ike resistor chọrọ ike.

Uru na ọghọm

Practice na-egosi na ime ihe ike nke resistor bụ mma ntọt ke size dispersion na 30%, na na ala convection ogige - na 50%. E wezụga a ọtụtụ uru, LM317 Ikanam ugbu regulator nwere a ole na ole drawbacks. N'etiti ha:

• Obere arụmọrụ.
• The mkpa iji wepụ okpomọkụ si usoro.
• AC Stabilization n'elu 20% nke ịgba uru.

Izere nsogbu na-arụ ọrụ nke ngwaọrụ ga-eji ịmafe regulators.

Ọ bụ uru na-arịba ama na ọ bụrụ na ị chọrọ ijikọ a elu-ike Ikanam unit ike nke 700 milliamps chọrọ gbakọọ uru nke usoro: R = 1, 25/0, 7 = 1.78 ohms. Power dissipation ga-karị 0, 88 watts.

njikọ

Ngụkọta oge LM317 ugbu regulator dabeere na ọtụtụ ụzọ nke njikọ. N'okpuru ebe bụ isi atụmatụ:

1. Ọ bụrụ na ị na-eji a ike transistor ụdị Q1, i nwere ike na-enweghị a heatsink Micro mmepụta ugbu a nke 100 MA. Ọ bụ iji ịchịkwa transistor. Dị ka a na nchekwa net si oké ụgwọ D1 na D2 na-eji na-echebe diodes, na yiri electrolytic capacitor nwere ọrụ iji belata ndabere mkpọtụ. Mgbe iji transistor Q1, karịa mmepụta ike nke ngwaọrụ 125 Watts.
2. Na ọzọ imewe na-enye mmachi ugbu a ọkọnọ na anụ ọrụ LEDs. Special ọkwọ ụgbọala na-enye ohere ị na ike ọcha nke ikike si na 0, 2 watts na 25 volts.
3. Na ọzọ imewe etinyere voltaji ẹsụhọde transformer si netwọk agbanwe site 220 watts na 25 watts. Site n'enyemaka nke diode akwa AC voltaji na-ghọọ a na-adịgide adịgide ezu. Ọzọkwa, niile mmejọ na-larịị n'ihi na capacitor C1 ụdị na-enye anụ ọrụ nke voltaji regulator.
4. Ndị na-esonụ wiring esereese bụ otu n'ime ndị kacha. The voltaji ọnọ si abụọ asọfe nke transformer na 24 volts, na-adị na-agafe nyo na-enwetara na issuance ọnụego mgbe nile 80 volts. Nke a-ezere uku karịa ọkọnọ voltaji mbata.

Ọ bụ uru na-arịba ama na a mfe batrị chaja nwekwara ike-anakọtara na ndabere nke mgbawa n'okpuru echiche nke ngwaọrụ. Kwadebere ọkọlọtọ linear regulator na kemeghi mmepụta voltaji egosi. Na a yiri ọrụ nwere ike na-arụ ọrụ microassembly ngwaọrụ.

analogs

Ike stabilizer LM317 nwere ọtụtụ analogues na anụ ụlọ na ndị mba ọzọ na ahịa. The kasị ama nke ha bụ ndị na-esonụ ụdị:

• Domestic mgbanwe KR142 na KR115 EN12 EN1.
• GL317 nlereanya.
• Ọdịiche SG31 na SG317.
• UC317T.
• ECG1900.
• SP900.
• LM31MDT.

Nyocha

Dị ka ọ pụtara ìhè site nzaghachi si ọrụ, akuko regulator si anagide ya ọrụ. Karịsịa mgbe ọ na-abịa aggregation na ikanam ọcha, na voltaji 50 volts. Simplifies mmezi na ime ihe nke ngwá na-ekwe omume ukpụhọde njikọ dị iche iche atụmatụ. Gripe na ngwaahịa a bụ dị na uche na nso na ọkọnọ voltaji nyere ya ole na ịgba ụkpụrụ.

Ná ngwụsị nke

Kemeghi stabilizer integral ụdị LM317 bụ ezigbo maka imewe nke mfe ike onunu, gụnyere mmiri na akụkụ ahụ mapụtara maka kọmputa akụrụngwa, onwem na a dịgasị iche iche nke mmepụta kwa. Nke a ngwaọrụ nwere ike ịbụ a gaghị agara ugbu a na voltaji ma ọ bụ a usoro gosiri e ji mara. N'ihi na ala nke ngụkọta oge, ntuziaka nwere a pụrụ iche mgbako stabilizer enye gị ohere ịhọrọ nri atụmatụ na-ekpebi ekwe omume nke ịmụta.