Texas Instruments LM3477 Buck Controller Evaluation Module

Product Information

Iyo LM3477 Buck Controller Evaluation Module ndiyo yazvino modhi, yakakwira-parutivi N chiteshi FET controller. Inonyanya kushandiswa mukugadzirisa buck.
Iyo LM3477 inobvumira kwakakura kwakakura kwekuisa, zvinobuda, uye mitoro.
Dare rekuongorora rinouya rakagadzirira kushanda nemamiriro chaiwo.

Mirayiridzo Yekushandiswa Kwechigadzirwa

1. Ita shuwa kuti masimba emagetsi (catch diode, inductor, uye mafirita capacitors) akaiswa padhuze paPCB marongero. Ita kuti mitsetse iri pakati pavo ipfupike.
2. Shandisa zvakafara zviteshi pakati pezvikamu zvemagetsi uye zvekubatanidza magetsi kune DC-DC inoshandura dunhu.
3. Batanidza mapini epasi eiyo yekupinza uye yekubuda mafirita capacitors uye ubate diode padhuze sezvinobvira uchishandisa akakodzera marongero maitiro.

Bhiri Rezvinhu (BOM)

Chikamu	Value	Chikamu Nhamba
CIN1	594D127X0020R2	Kwete, batanidza
CIN2	Kwete, batanidza	Kwete, batanidza
COUT1	LMK432BJ226MM (Taiyo Yuden)	LMK432BJ226MM (Taiyo Yuden)
COUT2	DO3316P-103 (Coilcraft)	1.8 k
L	CRCW08051821FRT1 (Vitramon)	12 nF/50 V
RC	VJ0805Y123KXAAT (Vitramon)	Kwete, batanidza
CC1	5A, 30v	IRLMS2002 (IRF)
CC2	100 V, 3 A	MBRS340T3 (Motorola)
Q1	20	CRCW080520R0FRT1 (Vitramon)
D	1 k	CRCW08051001FRT1 (Vitramon)
RDR	16.2 k	CRCW08051622FRT1 (Vitramon)
RSL	10.0 k	CRCW08051002FRT1 (Vitramon)
RFB1	470 pF	VJ0805Y471KXAAT (Vitramony)
RFB2	0.03	Kwete, batanidza

Performance

Kubudirira vs mutoro uye kushanda zvakanaka vs VIN magirafu anoratidzwa mubhuku remushandisi rekutarisa.

Layout Basics

Nekurongeka kwakaringana kweLM3477 Buck Controller Evaluation Module, tevera mirairo iyi:

1. Isa zvinhu zvemagetsi (catch diode, inductor, uye mafirita capacitors) pedyo pamwe chete pane PCB dhizaini. Ita kuti mitsetse iri pakati pavo ipfupike.
2. Shandisa zvakafara zviteshi pakati pezvikamu zvemagetsi uye zvekubatanidza magetsi kune DC-DC inoshandura dunhu.
3. Batanidza mapini epasi eiyo yekupinza uye yekubuda mafirita capacitors uye ubate diode padhuze sezvinobvira uchishandisa akakodzera marongero maitiro.

Tarisa kune bhuku remushandisi re LM3477 Evaluation Board PCB Layout diagram.

Nhanganyaya

Iyo LM3477 ndiyo yazvino modhi, yakakwira-side N chiteshi FET controller. Inonyanya kushandiswa mukugadzirisa buck, sezvinoratidzwa mumufananidzo 1-1. Ese masimba ekuitisa masimba edunhu ari kunze kune LM3477, saka yakakura siyana yekupinza, zvinobuda, uye mitoro inogona kugarwa neLM3477.
Iyo LM3477 evaluation board inouya yakagadzirira kushanda pane zvinotevera mamiriro:

• 4.5 V ≤ VIN ≤ 15 V
• VOUT = 3.3 V
• 0 A ≤ IOUT ≤ 1.6 A
• Dunhu neBOM yechishandiso ichi zvinopihwa muMufananidzo 1-1 uye Tafura 1-1.

Tafura 1-1. Bhiri reZvinhu (BOM)

Chikamu	Value	Chikamu Nhamba
CIN1	120 µF/20 V	594D127X0020R2
CIN2	Hapana chinobatanidza
COUT1	22 µF/10 V	LMK432BJ226MM (Taiyo Yuden)
COUT2	22 µF/10 V	LMK432BJ226MM (Taiyo Yuden)
L	10 μH, 3.8 A	DO3316P-103 (Coilcraft)
RC	1.8 kΩ	CRCW08051821FRT1 (Vitramon)
CC1	12 nF/50 V	VJ0805Y123KXAAT (Vitramon)
CC2	Hapana chinobatanidza
Q1	5A, 30v	IRLMS2002 (IRF)
D	100 V, 3 A	MBRS340T3 (Motorola)
RDR	20 Ω	CRCW080520R0FRT1 (Vitramon)
RSL	1 kΩ	CRCW08051001FRT1 (Vitramon)
RFB1	16.2 kΩ	CRCW08051622FRT1 (Vitramon)
RFB2	10.0 kΩ	CRCW08051002FRT1 (Vitramon)
CFF	470 pF	VJ0805Y471KXAAT (Vitramony)
RSN	0.03 Ω	WSL 2512 0.03 Ω ±1% (Dale)

Performance

• Mufananidzo 2-1 kusvika Figure 2-2 inoratidza imwe bhenji data yakatorwa kubva kudunhu riri pamusoro paLM3477 evaluation board. Iri bhodhi rekuongorora rinogona kushandiswawo kuongorora dhizaini regulator rakagadziridzwa kune imwe nzvimbo yekushandisa kana kuongorora kutengeserana pakati pemutengo uye imwe dhizaini yekuita. For example, iko kutendeuka kushanda kunogona kuwedzerwa nekushandisa yakaderera RDS (ON) MOSFET, iyo ripple vol.tag+
• Iko kushandiswa kwekushandura kunogona kuwedzerwa nekushandisa yakaderera RDS (ON) MOSFET, zvisinei, inodonha sekuisa vol.tage inowedzera. Iko kushanda kunodzikira nekuda kwekuwedzera diode conduction nguva uye kuwedzera kurasikirwa kwekuchinja. Kurasikirwa kwekuchinja kunokonzerwa nekurasikirwa kweVds × Id shanduko uye kurasikirwa kwegedhi rekuchaja, ese ari maviri anogona kudzikiswa nekushandisa FET ine yakaderera gedhi capacitance. Panguva yakaderera-basa cycles, apo zhinji simba kurasikirwa
  muFET kunobva pakurasikirwa kwekuchinja, kutengesa kure kumusoro RDS(ON) kune yakaderera gedhi capacitance kuchawedzera kushanda zvakanaka.
• Mufananidzo 3-1 inoratidza bode plot yeLM3477 yakavhurika loop frequency mhinduro uchishandisa ekunze zvikamu zvakanyorwa muTafura 1-1.

Hysteretic Mode

Sezvo mutoro wazvino unodzikira, iyo LM3477 inozopedzisira yapinda mu 'hysteretic' maitiro ekushanda. Rini
mutoro wazvino unodonha pazasi peiyo hysteretic modhi chikumbaridzo, iyo inobuda voltage inosimuka zvishoma. The overvoltage dziviriro (OVP) muenzanisi anonzwa kusimuka uku uye anoita kuti simba MOSFET rivhare. Sezvo mutoro unodhonza ikozvino kunze kweinobuda capacitor, iyo inobuda voltage inodonha kusvika yarova chikumbaridzo chakaderera chemuenzanisi weOVP uye chikamu chinotanga kushandura zvakare. Maitiro aya anoguma nekudzikira frequency, yepamusoro peak-to-peak kubuda voltage ripple kupfuura neyakajairika pulse wide modulation scheme. Hukuru hwekubuda voltage ripple inotarwa neOVP pachikumbaridzo mazinga, ayo anotumirwa kune mhinduro voltage uye anowanzo 1.25 V kusvika 1.31 V. Kuti uwane mamwe mashoko, ona tafura yeMagetsi eMamiriro muLM3477 High Efficiency High-Side N-Channel Controller yeKushandura Regulator Data Sheet. Kana iri 3.3-V inobuda, izvi zvinoturikira kune yakadzorwa kubuda voltage pakati pe3.27 V uye 3.43 V. The hysteretic mode threshold point ibasa reRSN uye RSL. Mufananidzo 3-1 inoratidza hysteretic pachikumbaridzo maringe neVIN yeLM3477 evaluation board ine uye isina RSL.

Kuwedzera Current Limit

• Iyo RSL resistor inopa kuchinjika pakusarudza iyo ramp yemuripo wemateru. Kutsikirira muripo kunokanganisa diki inductance yekugadzikana (ona chikamu cheSlope Compensation muLM3477 High Efficiency High-Side N-Channel Controller yeSwitching Regulator Data Sheet), asi inobatsirawo kuziva muganhu wezvino uye hysteretic threshold. Sezvo example, RSL inogona kudimburwa nekutsiviwa ne 0-Ω resistor kuitira kuti pasave nekuwedzera muripo wemutsetse unowedzerwa kune yazvino pfungwa waveform kuti uwedzere muganhu wazvino. Imwe nzira yakajairwa yekugadzirisa muganho wazvino ndeyekuchinja RSN. RSL inoshandiswa pano kushandura muganhu wazvino nekuda kwekureruka uye kuratidza kutsamira kwemuganho wazvino kuRSL. Nekuchinja RSL kuita 0 Ω, zvinotevera zvinogona kusangana:
• 4.5 V ≤ VIN ≤ 15 V
• VOUT = 3.3 V
• 0 A ≤ IOUT ≤ 3 A
• Muganho wazvino ibasa risina simba remuripo wemateru uye basa rakasimba remushonga wepfungwa. Nekudzikisa RSL, muripo wemateru unodzikira, uye nekudaro muganhu unowedzera. Iyo hysteretic mode pachikumbaridzo ichawedzerawo kusvika pa1 A (ona Mufananidzo 3-1).
• Mufananidzo 4-1 unoratidza bode plot yeLM3477 yakavhurika loop frequency mhinduro uchishandisa yakagadziridzwa (RSL = 0 Ω) zvikamu kuti uwane yakakwirira kuburitsa ikozvino kugona.

Layout Basics

Kurongeka kwakanaka kweDC-DC converter kunogona kuitwa nekutevera mashoma akareruka dhizaini dhizaini:1. Isa zvinhu zvemagetsi (catch diode, inductor, uye mafirita capacitors) pedyo pamwe chete. Ita kuti mitsetse iri pakati pavo ipfupike.

1. Shandisa zvakafara zviteshi pakati pezvikamu zvemagetsi uye zvekubatanidza magetsi kune DC-DC inoshandura dunhu.
2. Batanidza mapini epasi eiyo yekupinza uye yekubuda mafirita capacitors uye bata diode padhuze sezvinobvira uchishandisa rupo chikamu-padivi mhangura kuzadza senge pseudo-pasi ndege. Zvadaro, batanidza izvi kune pasi-ndege ine vias akawanda.
3. Ronga zvikamu zvemagetsi kuitira kuti zvishwe zvinoshandura zvino curl munzira imwe chete.
4. Nzira yepamusoro-frequency simba uye kudzoka kwepasi senzira dzakanangana dzakafanana.
5. Kupatsanura zvinonzwa ruzha, senge voltage mhinduro nzira, kubva kune ruzha runyoro rwakabatana nemagetsi emagetsi.
6. Ita shuwa yakanaka yakaderera-impedance ivhu rekushandura IC.
7. Isa zvikamu zvinotsigira zvekushandura IC, zvakadai sekubhadhara, kusarudzwa kwefrequency uye zvikamu zvekuchaja-pombi, padyo neinoshandura IC sezvinobvira asi kure nekutsvaga kwemhere uye zvikamu zvesimba. Ita kubatanidza kwavo kune inoshandura IC uye ndege yayo yepseudo-pasi ipfupi sezvinobvira.
8. Isa ruzha runonzwa sedunhu, senge redhiyo-modemu IF mabhuroko, kure neDC-DC inoshandura, CMOS dhijitari mabhuroko, uye mamwe madhijitari ane ruzha.

Revision History

CHERECHEDZA: Nhamba dzepeji dzedzokororo yapfuura dzinogona kusiyana nenhamba dzepeji mushanduro yazvino.
Shanduko kubva kuRevision E (Kubvumbi 2013) kuenda kuRevision F (Kukadzi 2022)

• Vandudza fomati yenhamba yematafura, manhamba, uye mamwe mareferensi mugwaro rese. …………… .2
• Yakagadziridzwa zita regwaro remushandisi rakagadziridzwa…………………………………………………………………………………………………………………………………………

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Zvinyorwa / Zvishandiso

Texas Instruments LM3477 Buck Controller Evaluation Module [pdf] Bhuku reMushandisi LM3477 Buck Controller Evaluation Module, LM3477, Buck Controller Evaluation Module, Controller Evaluation Module, Evaluation Module, Module

References

• User Manual