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SY8876DFC (SY20246DFC) 6A Buck Regulator: Whakamāramatanga, Pinout, Hiko, me ngā rerekētanga

Oct02

Tirotiro: 477

Ko te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs he 6 A synchronous step-down DC-DC regulator i hangaia e Silergy, e whakamahia ana hei huri i te 2.7 V ki te 6.5 V input ki te whakaora i teputa tautuhia. I te wa e noho ana a Silergy i te taputapu hei SY20246DFC (SY8876DFC). Kei te mau wātea ko te 1.2 MHz te rēreti huri, kei roto i ngā MOSFETs pūngao, me te pakete DFN2×2-8 pātea. Ka kapi tēnei tuhinga i ōna whakaritenga, pinout, te kaupapa mahi, ngā āhuatanga pūngao, ngā kōwhiringa tiaki, te hiko tono, ngā rahi pātea, te rārangi PCB, me ngā taputapu rerekē.

Kākau

1. SY8876DFC Overview and Ordering Information

2. SY8876DFC Specifications

3. SY8876DFC Pinout and Pin Functions

4. SY8876DFC Block Diagram and Working Principle

5. SY8876DFC Electrical Characteristics and Protection

6. SY8876DFC Application Circuit and Design Considerations

7. SY8876DFC Package Dimensions and PCB Layout

8. SY8876DFC Alternatives

9. Conclusion

Figure 1. Representative SY8876DFC Package Image

Whakaahua 1. Whakaaturanga Pūnaha SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs

SY8876DFC Overview and Ordering Information

Ko te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs he synchronous step-down DC-DC regulator i hangaia e Silergy. E kī ana te whārangi pātea o Silergy nāna i tautuhi te taputapu hei SY20246DFC (SY8876DFC). E piri ana mai i te 2.7 V ki te 6.5 V input ka tuku i te 6 A te paehau kei te pātea. E rua ngā MOSFET pūngao e whakaheke ana i te rahi o ngā pūtau pūngao taha.

Kei te whakahaerehia te regulator i te whakaritenga huri i te 1.2 MHz, e taea ai te whakamahi i ngā inductors me ngā capacitors iti. E tuku ana hoki i te tīmatanga māmā, he pūnaha hiko pai, tiaki i te pāmahana, te pupuni i te teitei, me te tiaki i te pāmahana. E tukuna ana te taputapu i roto i te pakete DFN2×2-8 āta.

Ota Rūma	Te tikanga
SY8876	Tūhuratanga rēhita pūnaha synchronous step-down DC-DC
SY20246	Te rātaka taputapu mōna i nāianei
DF	Ko te waehere pakete DFN2×2-8
C	Waehere pāmahana / ota
Pākete	8-pin DFN, 2 × 2 mm
Packaging	Pānui me te rīpene

I te wā e noho ana a Silergy i te hua hei SY20246DFC (SY8876DFC) kaua e whakaatu i te SY20246DFC hei taputapu whakakapi rangitahi.

Tonoā tō rahi e hiahiatia ana me te wāhi tuku i roto i te puka RFQ ki te tono mō ngā pātea e wātea ana, te utu, te wā hopu, te rā waehere, te pūngao, me ngā pārongo pātea.

SY8876DFC Specifications

Tūtohu	Whakamāramatanga
Kaihanga	Silergy
Te rātaka taputapu nāianei	SY20246DFC ( SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs )
Momo taputapu	Synchronous step-down DC-DC regulator
Te rahi o ngā ouput kāwai	1
Te pēhanga input	2.7 V ki 6.5 V
Te pēhanga ouput	0.6 V ki 5 V i te whārangi pūtea Silergy nāianei
Te ōrau ouput mōrā	Kia tae ki te 6 A
Te rēreti huri	1.2 MHz pātea
Te whaihua	Kia tae ki te 94% i raro i ngā whakaritenga whakamātautau e hāngai ana
Te pēhanga tohutohu hiko	0.6 V pātea
Te mōhiohio pātea o te pēhanga tohutohu	±1.5%
Ruarua MOSFET teitei	38 mΩ tikanga
Ruarua MOSFET iti	15 mΩ tikanga
Atoatoa hihi	60 µA tikanga
Hihi kati	0.1 µA tikanga
Te tikanga teitei rawa	100%
Wā tiimata pātea	0.8 ms tikanga
Te pokanga hihi teitei	7.5 A iti rawa
Bunga mokowā tiaki	0.25 V tikanga i FB
Pūrere hātepe pāhotanga	150°C tikanga
Pākete	DFN2×2-8
Rahi Pākete	2 × 2 mm
Whakamātautau	Rongoā RoHS, kore halogen

Ka whakamārama te whārangi hua Silergy i te rahi o te putanga-tau ki te 0.6 V ki te 5 V. Ko te kōwae tuarua Rev. 0.9A SY8876 i pānuitia i muri mai i tēnei tuhinga e whakaatu ana i te 0.6 V ki te 6 V i raro i ngā āhuatanga e tūtohu ana. Na, ko te rahi o te whārangi hua Silergy o naianei, 0.6–5 V, e whakamahia ana mō te whakaahua matua i runga ake. I pānuitia e te tuhinga i mua te Rev. 0.9A mō ana raraunga ā-āwhina hiko.

Ka taea e te taputapu te whakatutuki i te 94% te whakahaere i ngā tikanga whakamātautau e pā ana; ko te whakarahi pono e whakawhirinaki ana ki te VIN, VOUT, hihi tāpiri, kōwhiringa kōwae, me te whakaritenga PCB. E whakaahua ana a Silergy i te wāhanga hei whai i te whakahaere i te 94%.

SY8876DFC Pinout and Pin Functions

Ka whakamahia e te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs he pākete 8-pin DFN2×2. Ko āna pin e tuku ana i te mana whakauru, te whakahaere e taea ai, te putanga huri, te whenua, te tohu pai-mana, me te hiko ki te whakautu. Ko ngā hononga LX me GND e whakamahi ana i ngā pin e rua hei tautoko i te wāhanga mana.

Figure 2. SY8876DFC Pinout

Whakaahua 2. SY8876DFC Pinout

Nama Pin	Ingoa Pin	Mahi
1	EN	Whakauru ki te whakahohe. Huaki teitei ki te huri i te kaiwhakaora. Kaua e waiho hei rao.
2	IN	Mana whakauru. Honohono ki te whakauru i te pūmua me te whakatakoto te capacitor keramik ki te IN me GND.
3, 6	LX	Ruarua huri pin. Honohono i ngā pin e rua ki te inductor hōhonu.
4, 5	GND	Hononga whenua mō te kaiwhakaora.
7	PG	Putanga mana-pai kāore i te kākahu. E hiahiatia ana he rēreti pātea ki te tiketike i te taumata pane.
8	FB	Whakauru hiko. Honohono ki te pokapū o te whakaoti-pūhiko hiko.

SY8876DFC Block Diagram and Working Principle

Ka whakamahia e te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs ngā MOSFET rongoā teitei me ngā MOSFET rongoā iti, te rahi whakahaere, te tirohanga hihi, me te whakautu hiko hei whakawhānui i te mana ākonga DC teitei ki te mana kāwe hiko iti.

Figure 3. SY8876DFC Block Diagram

Whakaahua 3. SY8876DFC Block Diagram

Ko ngā mahi matua e whakauru ana i te:

• Mana Tuku
: Ka tango i te 2.7 V ki te 6.5 V DC whakauru.

• Whakahaere ki te hihiri
: He taumata teitei i runga i EN e whakahohe i te kaiwhakaora me te tīmata i tana raupapa tiimata pātea.

• Huringa MOSFET
: Ka huri te kaiwhakahaere i ngā MOSFET rongoā teitei me ngā MOSFET rongoā iti.

• Wiri Hoko
: Ko te inductor ā-ātea me ngā capacitor e whakawhiti i te wiri huringa ki te mana kāwe hiko.

• Whakahaere Te Whakautu
: Ko te pin FB e tirotiro ana i te hiko whakahaere nāna ngā rēreti ā-ātea.

• Tiaki
: Ko te hiko teitei, te pācool ngā hiko, me te pā nga pārahi e tautoko ana i te kaiwhakaora.

• Putanga Mana-Pai
: PG e tuku ana i te tohu o te āhua pāhotanga hiko.

SY8876DFC Electrical Characteristics and Protection

Ka mahi te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs mai i te 2.7 V ki te 6.5 V whakauru ka tautoko i te 6 A o te hiko putanga noho tonu. Ka whakamahi i te paerewa 0.6 V whakarāpopoto ka mahi i te 1.2 MHz i te pāhekoheko.

Tāke	Iti	Tikanga	Rahi	Wātea
Te pāmahana whakauru	2.7	—	6.5	V
Te pāmahana whakarāpopoto	0.591	0.600	0.609	V
Atoatoa hihi	—	60	—	µA
Hihi kati	—	0.1	1	µA
Ruarua MOSFET teitei	—	38	—	mΩ
Ruarua MOSFET iti	—	15	—	mΩ
Te hōkakatanga huringa	—	1.2	—	MHz
Te wa iti rawa	—	60	—	ns
Te tikanga teitei rawa	100	—	—	%
Wā tiimata pātea	—	0.8	—	ms
Te kāinga teitei whakarahi	1.2	—	—	V
Whakauruhia te paerata e taka ana	—	—	0.4	V
LX te puranga hiko mo te whakaheke	—	50	—	Ω

Ko nga raraunga āhuatanga hiko o Rev. 0.9A i whai i te tuhinga taketake ka whakamahia nga tikanga whakamatautau o VIN = 5 V, VOUT = 2.5 V, L = 0.47 µH, COUT = 2 × 22 µF, TA = 25°C, me IOUT = 1 A ina kaua e korero atu.

Nga Mahi Tiaki

Mahi Tiaki	Whakatau	Whakamārama
Tiaki pāmahana teitei	7.5 A te iti rawa te reeti pāmahana teitei	Ka whakaitihia te pāmahana pātea teitei
Tiaki hiko kīanga	0.25 V te tikanga i FB	Ka kitea te pāmahana hiko kāore e taea
Tiaki pāmahana kāore e taea	2.7 V te pae teitei	Ka aukati i te mahi ka heke te VIN
UVLO te tīwae	0.3 V te tikanga	Ka awhina ki te aukati i te whakahekenga e maharahia ana i te pae
Ka whakangaro i te pāmahana	150°C te tikanga	Ka whakaweto i te mea whakarite i te pāmahana teitei
Te whakaweto pāmahana	15°C te tikanga	Ka whakaratohia te wehenga pāmahana i mua i te whakaara
Pae pai hiko	0.54 V te tikanga i FB	Ka tirohia te whakahaere i te putanga
Whakaara māmā	0.8 ms te tikanga	Ka awhina ki te whakaritenga i te pāmahana e tīkaingia ana

SY8876DFC Huringa Whakamahi me nga Whakaaro Hoahoa

Ko te e pā ana ki te 1.8 V e whakamahia ana e te rārangi raraunga e whai ake nei ngā whakauru ā-waho:

Wahi	Uara tikanga	Mahi
VIN	2.7 V ki te 6.5 V	Tūhono pāmahana hiko
VOUT	1.8 V	Putanga whakahaere
CIN	22 µF	Ka whaitake i te pāmahana hiko
L	0.47 µH	Ka pupuri me te whakawhiti te pūngao
COUT	2 × 22 µF	Ka tohe te pāmahana putanga
RH	100 kΩ	Whakatūpato hiko teitei
RL	49.9 kΩ	Whakatūpato hiko iti
CFF	22 pF	Kapasitor pānui
RPG	100 kΩ	Whakatūpato hiko mo PG
REN	1 MΩ	Whakatūpato hiko mai i VIN ki EN i te rārangi raraunga tikanga

I te whakamahi tikanga, ko te 1 MΩ REN e tūhonohia ana te VIN ki EN hei whakararo ahua, ahakoa te huringa tono e tūhonohia ana te 1 MΩ i waenga i te VIN me te EN. Ko nga rauemi tono a Silergy e whakaatu ana i te 1 MΩ REN i pāngia ki te hononga VIN ki EN.

Ko te pāmahana putanga e whakaritea e nga whakaeke e rua e tūhonohia ana ki te pīn FB:

VOUT = 0.6 V × (1 + RH/RL)

I reira:

• RH: Te whakatū hiko e tūhonohia ana i waenga i te VOUT me te FB.

• RL: Te whakatū hiko e tūhonohia ana i waenga i te FB me te GND.

Mo RH = 100 kΩ me RL = 49.9 kΩ, VOUT ≈ 1.80 V.

Nga Whakaaro Hoahoa

• Kapasitor Tūhono: Whakaritehia te kapasitor keramine 22 µF ki te IN me te GND kia whakahekehia te pāmahana hiko me te haruru hiko.

• Hiko Tūnga: Whakamahia he hiko 0.47 µH e đủ te pāmahana me ngā whakaheke pā maia mo te taumahatanga e whakamahia ana.

• Kapasitor Putanga: Ko te whakamahinga tikanga kei te whakamahi e rua nga kapasitor putanga 22 µF.

• Whakatūpato Hiko: Me pupuri te whakatūpato hiko i te awhina FB me te tawhiti atu i te hōtaka LX.

• Whakauru: Ko te whakamahinga tikanga e tūhonohia ana te 1 MΩ REN hei pātea mai i VIN ki EN.

• Pānga Pai: Ko PG he putanga tuwhera-i-raina, ka hiahiahia he whakatūpato ā-waho.

• Hiko PCB: Me pupuri te hiko teitei hiko ṭika me te whakarato i te mātika mīhini kia taea te raru me te tāpiri pāmahana.

• Hoahoa Pāmahana: Tēnā tirohia te pāmahana hohonu i raro i te taumahatanga e tīkina ana me ngā āhuatanga tuu nui.

• Pānga: E whakawhirinaki ana te pānga tūturu ki te VIN, VOUT, hiko putanga, ngā ngū te hiko me ngā whakaurangi, hiko PCB, me ētahi atu whakaritenga.

SY8876DFC Rahi Pākete me te Hiko PCB

Figure 4. SY8876DFC DFN2×2-8 Package Dimensions

Whakaahua 4. SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs DFN2×2-8 Rahi Pākete

Whakarite	Rahi
Momo Pākete	DFN2×2-8
Te nama o nga pin	8
Te roa o te tinana	1.90–2.10 mm
Te whānui o te tinana	1.90–2.10 mm
Te teitei o te pākete	0.45–0.65 mm
Te pāmahana pūti	0.50 mm
Nga tūtohu taupānga PCB	Nāti ki te 2.30 × 2.40 mm

Nga Aratohu Hiko PCB

Figure 5. PCB Layout Suggestion

Whakaahua 5. Tūtohu Hiko PCB

Punaha: Puka ā-ratonga Silergy

• Whakauruhia te capacitor input tata ki te IN me nga pins GND.

• Whakauruhia te inductor tata ki nga pins LX.

• Pupuri te LX switching-node copper hei poto me te tawhiti i te korero whakahoki.

• Whakauruhia nga capacitors putanga tata ki te inductor me te hokinga whenua.

• Hokia te FB i te ara hiko tere nui haruru.

• Whakamahia nga hononga whenua poto me te copper PCB e tika ana mo te paungarahu mahana.

Nga Whakaritenga SY8876DFC

Hua Whakaritenga	Nga Whakaritenga Matua	Nga Tino Rerekētanga me nga Tirohanga Whakarite
SY8816DFC / SY20228DFC	Silergy, te hāngai ki te 2.75–6 V input, 6 A putanga, 1.2 MHz, DFN2×2-8	He pokapū iti ake te hātepe input i te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs . Whakaritehia te pinout, te rohe paerewa, te tukanga whakahoki, te pātea PCB, me nga mahi tiaki.
TPS62870	Texas Instruments, 6 A buck regulator, tae atu ki te 6 V input	Ka tautoko te pāmahana whakamutunga he iti iho te hātepe hihiri i te SY8876DFC, e mahi ana ki te 6.5 V. Ka whakamahi i tetahi pūnaha rerekē, te whakaritenga hiko, me te whakatakotoranga PCB, nā reira he mea kāore e taea te whakakapi. Tīmatahia nga rohe input me putanga, pinout, te tukanga whakahoki, ngā wāhanga waho, te hanga pāmahana, me ngā whakaritenga PCB.

Ko enei taputapu te whiringa e hiahia ana ki te tāuta, kāore e taea te whakakapi i runga i te whakatutukitanga. I mua i te whakakapi, tirohia te pinout, te pūnaha, te rohe tuku, te rohe pūtanga, te rohe hiko, te tikanga hiko, te tukanga whakahoki, ngā wāhanga waho, te mahi pāmahana, te pātea PCB, me ngā whakaaetanga e hiahiatia ana.

Whakakapi

Ko te SY8876DFC SY8876DFC SILERGY 12481 In Stock: 6100 pcs , i whakaratohia i te wā nei e Silergy hei SY20246DFC (SY8876DFC), he pūnaha kākano e kākahu ana ki te tuku tae atu ki te 6 A i te 2.7 V ki te 6.5 V input. Ko te whārangi hua Silergy e wātea ana he hātepe putanga 0.6–5 V me te pai ka tae ki te 94%, i te mea ko te pai tūturu e pīnono ana i runga i ngā āhuatanga e mahi ana me te hoahoatanga o te aratau. Mō tētahi poari e wātea ana, tirohia te pūnaha, te tukanga whakahoki, te hono EN, te whakatakotoranga PCB, te mahi pāmahana, me te tohu tuku i runga i ngā whakaritenga i mua i te hoko, i te mea rānei i te whakakapi.

Nga Pātai Auau [FAQ]

1. He aha te rohe voltage input o te SY8876DFC?

E mahi ana te taputapu i nāna i te 2.7 V ki te 6.5 V input supply.

2. He aha te rohe pūtanga-voltage e tika ana mo te SY8876DFC?

Ko te whārangi hua o Silergy e wātea ana i te wā nei e tohu ana i te 0.6 V ki te 5 V. Ko te tuhinga matua Rev. 0.9A e kōrero ana i tēnei tuhinga i te 0.6 V ki te 6 V i raro i ngā āhuatanga e tika ana ki te mahi. Mō ngā kōrero hua o nāna, whakamahia te 0.6–5 V rohe i te mea kāore e tohu atu te Silergy.

3. Me pēhea te whakauru i te pūtanga voltage o te SY8876DFC?

Whakamahia:

VOUT = 0.6 V × (1 + RH/RL)

Ko RH te rīni o runga mai i VOUT ki FB, ā, ko RL te rīni o raro mai i FB ki GND. I runga i RH = 100 kΩ me RL = 49.9 kΩ, ko te pūtanga e kākahu ana he tata ki te 1.80 V.

4. Ko te 1 MΩ rīni EN he rīni pātea?

Kāore. I roto i te tuku pātea o te tuhinga pūtaiao, ko REN = 1 MΩ he rīni pātea teitei e hono ana mai i VIN ki EN, kāore mai i EN ki te whenua.

5. Ko te SY20246DFC he whakaritenga mō te SY8876DFC?

I whakahuatia e Silergy te hua hei SY20246DFC (SY8876DFC), nā reira kāore e taea te tango te SY20246DFC hei whakaritenga motuhake i te taiwhanga whakakapi.