Texas Instruments LM3477 Buck Controller Module

Ozi ngwaahịa

LM3477 Buck Controller Evaluation Module bụ ọnọdụ dị ugbu a, onye njikwa FET nke akụkụ N dị elu. A na-ejikarị ya eme ihe na nhazi ego.
LM3477 na-enye ohere maka ọtụtụ ntinye, ntinye na ibu dị iche iche.
Ụlọ nyocha ahụ na-abịa na njikere ịrụ ọrụ na ọnọdụ ụfọdụ.

Ntuziaka ojiji ngwaahịa

1. Gbaa mbọ hụ na etinyere akụrụngwa ike (catch diode, inductor, and filter capacitors) nso na nhazi PCB. Mee ka akara dị n'etiti ha dị mkpụmkpụ.
2. Jiri akara obosara n'etiti akụrụngwa ike yana maka njikọ ike na sekit ihe ntụgharị DC-DC.
3. Jikọọ ntụtụ ala nke ntinye na mmepụta ihe nzacha capacitors wee jide diode nso dị ka o kwere mee site na iji usoro nhazi kwesịrị ekwesị.

Ụgwọ ihe (BOM)

Akụkụ	Uru	Nọmba akụkụ
CIN1	594D127X0020R2	Mba, jikọọ
CIN2	Mba, jikọọ	Mba, jikọọ
COUT1	LMK432BJ226MM (Taiyo Yuden)	LMK432BJ226MM (Taiyo Yuden)
COUT2	DO3316P-103 (Coilcraft)	1.8k
L	CRCW08051821FRT1 (Vitramon)	12 nF/50V
RC	VJ0805Y123KXAAT (Vitramon)	Mba, jikọọ
CC1	5 A, 30V	ILMS2002 (IRF)
CC2	100 V, 3 A	MBRS340T3 (Motorola)
Q1	20	CRCW080520R0FRT1 (Vitramon)
D	1k	CRCW08051001FRT1 (Vitramon)
RDR	16.2k	CRCW08051622FRT1 (Vitramon)
RSL	10.0k	CRCW08051002FRT1 (Vitramon)
RFB1	470pf	VJ0805Y471KXAAT (Vitramony)
RFB2	0.03	Mba, jikọọ

Arụmọrụ

E gosipụtara arụmọrụ vs ibu na arụmọrụ vs eserese VIN na ntuziaka onye ọrụ maka ntụnye aka.

Ntọala ntọala

Maka nhazi nke ọma nke LM3477 Buck Controller Evaluation Module, soro ntuziaka ndị a:

1. Debe ihe ndị ahụ ike (catch diode, inductor, and filter capacitors) nso na nhazi PCB. Mee ka akara dị n'etiti ha dị mkpụmkpụ.
2. Jiri akara obosara n'etiti akụrụngwa ike yana maka njikọ ike na sekit ihe ntụgharị DC-DC.
3. Jikọọ ntụtụ ala nke ntinye na mmepụta ihe nzacha capacitors wee jide diode nso dị ka o kwere mee site na iji usoro nhazi kwesịrị ekwesị.

Rụtụ aka na ntuziaka onye ọrụ maka eserese okirikiri PCB LM3477 Evaluation Board.

Okwu mmalite

LM3477 bụ ọnọdụ dị ugbu a, onye na-ahụ maka ọwa N dị elu. A na-ejikarị ya eme ihe na nhazi ego, dịka egosiri na foto 1-1. Ihe niile na-eduzi ike nke sekit bụ mpụga na LM3477, yabụ enwere ike ịnabata nnukwu ntinye, ntinye na ibu dị iche iche site na LM3477.
Ụlọ nyocha LM3477 dị njikere ịrụ ọrụ na ọnọdụ ndị a:

• 4.5 V ≤ VIN ≤ 15 V
• VOUT = 3.3 V
• 0 A ≤ Ọpụpụ ≤ 1.6 A
• Enyere sekit na BOM maka ngwa a na eserese 1-1 na tebụl 1-1.

Isiokwu 1-1. Bill of Materials (BOM)

Akụkụ	Uru	Nọmba akụkụ
CIN1	120µF/20V	594D127X0020R2
CIN2	Enweghị njikọ
COUT1	22µF/10V	LMK432BJ226MM (Taiyo Yuden)
COUT2	22µF/10V	LMK432BJ226MM (Taiyo Yuden)
L	10 µH, 3.8 A	DO3316P-103 (Coilcraft)
RC	1.8 kΩ	CRCW08051821FRT1 (Vitramon)
CC1	12 nF/50V	VJ0805Y123KXAAT (Vitramon)
CC2	Enweghị njikọ
Q1	5 A, 30V	ILMS2002 (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	470pf	VJ0805Y471KXAAT (Vitramony)
RSN	0.03 Ω	WSL 2512 0.03 Ω ±1% (Dale)

Arụmọrụ

• Ọgụgụ 2-1 ruo na eserese 2-2 na-egosi ụfọdụ data benchmark ewepụtara na sekit dị n'elu na bọọdụ nyocha LM3477. Enwere ike iji bọọdụ nleba anya iji nyochaa sekit regulator nke ebuka ahaziri maka ebe arụ ọrụ dị iche ma ọ bụ iji nyochaa azụmaahịa n'etiti ọnụ ahịa yana ụfọdụ oke arụmọrụ. Maka example, enwere ike ịbawanye arụmọrụ ntughari site na iji obere RDS(ON) MOSFET, ripple vol.tage nwere ike wedata ya na ndị na-emepụta mmepụta ESR dị ala, a pụkwara ịgbanwe ọnụ ụzọ hysteretic dị ka ọrụ nke RSN na RSL resistors.
• Enwere ike ịbawanye arụmọrụ ntụgharị site na iji obere RDS(ON) MOSFET, agbanyeghị, ọ na-adaba dị ka ntinye vol.tage na-abawanye. Ịrụ ọrụ nke ọma na-ebelata n'ihi ụbara oge nchịkwa diode yana mmụba ngbanwe mgbanwe. Mgbanwe ngbanwe bụ n'ihi mfu mgbanwe Vds × Id yana mfu ụgwọ ọnụ ụzọ ámá, nke enwere ike belata ha abụọ site na iji FET nwere ikike ọnụ ụzọ dị ala. Na obere ọrụ cycles, ebe ọtụtụ n'ime ike ọnwụ
  na FET sitere na ngbanwe mgbanwe, ịzụ ahịa kwụsịrị RDS (ON) dị elu maka ikike ọnụ ụzọ dị ala ga-abawanye arụmọrụ.
• Ọnụọgụ 3-1 na-egosi atụmatụ bode nke LM3477 meghere nzaghachi ugboro ugboro site na iji ihe ndị dị n'èzí depụtara na Tebụl 1-1.

Ụdị hysteretic

Ka ibu ugbu a na-ebelata, LM3477 ga-emecha banye n'ụdị ọrụ 'hysteritic'. Mgbe ole
ibu ugbu a na-adaba n'okpuru ọnọdụ ọnọdụ hysteritic, mmepụta voltage bilie ntakịrị. The overvoltage nchedo (OVP) comparator hụrụ ịrị elu a ma mee ka MOSFET ike mechie. Ka ibu ahụ na-ewepụta ugbu a na capacitor mmepụta, ihe mmepụta voltage na-adaba ruo mgbe ọ ruru ala ala nke OVP comparator na akụkụ ahụ malitere ịgbanwee ọzọ. Omume a na-ebute mbelata ugboro ole, elu elu-to-peak mmepụta voltage ripple karịa na nkịtị usu obosara modulation atụmatụ. Ogo nke mmepụta voltagA na-ekpebi e ripple site na ọkwa ọnụ ụzọ OVP, nke a na-ezo aka na nzaghachi voltage ma na-abụkarị 1.25 V ruo 1.31 V. Maka ozi ndị ọzọ, lee Tebụl Njirimara Eletriki dị na LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator Data Sheet. N'ihe gbasara mmepụta 3.3-V, nke a na-atụgharị na mmepụta nke edoziziri voltage n'etiti 3.27 V na 3.43 V. Ebe ọnụ ụzọ hysteretiiki bụ ọrụ nke RSN na RSL. Ọgụgụ 3-1 na-egosi ọnụ ụzọ hysteretic na VIN maka bọọdụ nyocha LM3477 nwere na enweghị RSL.

Na-abawanye oke ugbu a

• RSL resistor na-enye mgbanwe n'ịhọrọ ramp nke nkwụghachi ụgwọ mkpọda. Nkwụghachi ụgwọ mkpọda na-emetụta opekempe inductance maka nkwụsi ike (lee ngalaba nkwụghachi ụgwọ mkpọda na LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator Data Sheet), ma na-enyekwara aka chọpụta njedebe dị ugbu a na ọnụ ụzọ hysteretic. Dị ka example, RSL nwere ike ịkwupụ ma dochie ya na 0-Ω resistor ka ọ dịghị mgbakwunye mkpọda slope agbakwunyere na nke ugbu a sense waveform ka mụbaa oke ugbu a. Ụzọ a na-emekarị iji dozie oke dị ugbu a bụ ịgbanwe RSN. A na-eji RSL ebe a iji gbanwee oke dị ugbu a maka ịdị mfe yana igosi ndabere nke oke ugbu a na RSL. Site n'ịgbanwe RSL ka ọ bụrụ 0 Ω, enwere ike imezu ọnọdụ ndị a:
• 4.5 V ≤ VIN ≤ 15 V
• VOUT = 3.3 V
• 0 A ≤ Ọpụpụ ≤ 3 A
• Oke dị ugbu a bụ ọrụ na-adịghị ike nke nkwụghachi mkpọda na ọrụ siri ike nke ihe mgbochi uche. Site na ibelata RSL, nkwụghachi ụgwọ mkpọda na-ebelata, n'ihi nke a, oke dị ugbu a na-abawanye. Ọnụ ụzọ ọnọdụ hysteretic ga-abawanye ruo ihe dịka 1 A (lee eserese 3-1).
• Ọnụọgụ 4-1 na-egosi nhụta bode nke LM3477 mmeghe loop ugboro nzaghachi site na iji ihe gbanwetụrụ (RSL = 0 Ω) iji nweta ikike mmepụta dị elu ugbu a.

Ntọala ntọala

Enwere ike itinye nhazi dị mma maka ndị ntụgharị DC-DC site n'ịgbaso ụkpụrụ nhazi ole na ole dị mfe:1. Debe akụrụngwa ike (catch diode, inductor, na filter capacitors) nso ọnụ. Mee ka akara dị n'etiti ha dị mkpụmkpụ.

1. Jiri akara obosara n'etiti akụrụngwa ike yana maka njikọ ike na sekit ihe ntụgharị DC-DC.
2. Jikọọ ntụtụ ala nke ntinye na mmepụta ihe nzacha capacitors wee jide diode dị ka o kwere mee site na iji ihe mejupụtara akụkụ ọla kọpa na-emesapụ aka dị ka ụgbọ elu pseudo-ala. Mgbe ahụ, jikọọ nke a na ụgbọ elu ala na ọtụtụ vias.
3. Hazie akụrụngwa ike ka ọ bụrụ loops na-agbanwe ugbu a curl n'otu uzo.
4. Jigharịa ike ugboro ugboro dị elu na nloghachi ala dị ka ụzọ na-aga n'ihu na-aga n'ihu.
5. Ụzọ dị iche iche nwere mmetụta mkpọtụ, dị ka voltage ụzọ nzaghachi, sitere n'ụkpụrụ mkpọtụ jikọtara ya na akụrụngwa ike.
6. Gbaa mbọ hụ na ezigbo ala adịghị ike maka onye ntụgharị IC.
7. Debe ihe ndị na-akwado IC nke ntụgharị, dị ka nkwụghachi ụgwọ, nhọrọ ugboro ugboro na ihe mgbapụta mgbapụta, dị nso na IC ntụgharị dịka o kwere mee mana pụọ ​​​​na mkpọtụ mkpọtụ na ngwa ike. Mee njikọ ha na onye ntụgharị IC na ụgbọ elu pseudo-ala ya dị mkpụmkpụ dị ka o kwere mee.
8. Debe sekit nke nwere mmetụta mkpọtụ, dị ka ihe mgbochi redio-modem IF blocks, pụọ na ihe ntụgharị DC-DC, blocks dijitalụ CMOS, na sekit ndị ọzọ na-eme mkpọtụ.

Akụkọ ngbanwe

IHE: Nọmba ibe maka ngbanwe gara aga nwere ike ịdị iche na ọnụọgụ ibe na ụdị dị ugbu a.
Mgbanwe site na Ndozigharị E (Eprel 2013) gaa na Ndozigharị F (February 2022)

• Emelitere usoro ọnụọgụ maka tebụl, ọnụ ọgụgụ, na ntụaka n'ofe akwụkwọ ahụ dum. ………………….2
• Emelitere aha ntuziaka onye ọrụ emelitere2

Ọkwa dị mkpa na nkwupụta

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• TI jụrụ ma jụ usoro mgbakwunye ọ bụla ma ọ bụ dị iche iche ị nwere ike chepụta.

Ọkwa dị mkpa

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Akwụkwọ / akụrụngwa

Texas Instruments LM3477 Buck Controller Module [pdf] Ntuziaka onye ọrụ LM3477 Buck Monitor Module Evaluation Module, LM3477, Buck Controller Evaluation Module, Module Nyocha Onye njikwa, Module nyocha, Module

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