New Original LM25118Q1MH/NOPB Integrated Circuit IC REG CTRLR BUCK 20TSSOP Ic Chip LM25118Q1MH/NOPB
Njirimara ngwaahịa
| Ụdị | Nkọwa |
| Otu | Sekit jikọtara ọnụ (ICs) |
| Mfr | Ngwa Texas |
| Usoro | Ụgbọ ala, AEC-Q100 |
| ngwugwu | Tube |
| SPQ | 73 Tube |
| Ọnọdụ ngwaahịa | Na-arụ ọrụ |
| Ụdị mmepụta | Onye na-anya transistor |
| Ọrụ | Nkwụghachi-elu, mgbada-ala |
| Nhazi mmepụta | Nke dị mma |
| Topology | Buck, kwalite |
| Ọnụọgụ nke mmepụta | 1 |
| Usoro mmepụta | 1 |
| Voltaji - Ntinye (Vcc/Vdd) | 3V ~ 42V |
| Ugboro - Ịgbanwe | Ruo 500kHz |
| Usoro ọrụ (Max) | 75% |
| Ihe nrụpụta mmekọrịta | No |
| Mmekọrịta elekere | Ee |
| Oghere Usoro Interface | - |
| Njirimara njikwa | Kwado, njikwa ugboro ugboro, Ramp, Soft Start |
| Okpomọkụ na-arụ ọrụ | -40°C ~ 125°C (TJ) |
| Ụdị nkwụnye | Ugwu elu |
| Ngwungwu / Akpa | 20-PowerTSSOP (0.173 ", obosara 4.40mm) |
| Ngwungwu ngwaọrụ ndị na-eweta ihe | 20-HTSSOP |
| Nọmba ngwaahịa ntọala | LM25118 |
1. Mkpakọrịta mmekọrịta
Uru.
Ịrụ ọrụ dị elu: nkwụsi ike nke mos tube dị ntakịrị na nkwụsị voltaji na steeti dị ntakịrị karịa n'ihu Cosmos voltaji dobe nke Schottky diode.
Ọdịmma.
Nkwụsi ike na-ezughị ezu: mkpa ịmepụta sekit mbanye, ma zere tube nke elu na nke ala n'otu oge ahụ, sekit ahụ dị mgbagwoju anya, na-akpata nkwụsi ike zuru oke.
2. ego na-enweghị synchronous
Uru.
Ịrụ ọrụ dị ala: Schottky diode voltaji ọdịda dị ukwuu, n'ihe metụtara ike ike nke mos tube na-emepụta.
Ọdịmma.
Nkwụsi ike dị elu: a gaghị enwe nhazi oge nke tubes elu na nke ala.
1: PFM (usoro modulation ugboro ugboro)
Ịgbanwe obosara pulse bụ ihe doro anya, site n'ịgbanwe ugboro ugboro nke mmepụta ihe ọkụkụ, a na-eme ka mmepụta voltaji kwụsie ike.ụdị njikwa nwere uru nke obere ike oriri ọbụna mgbe ejiri ya ogologo oge, karịsịa na obere ibu.
2: PWM (Mgbanwe Obosara Pulse)
Ụdị njikwa PWM na-arụ ọrụ nke ọma ma nwee ezigbo mmepụta voltaji ripple na mkpọtụ.
Iji chịkọta: N'ozuzu, ọdịiche arụmọrụ dị n'etiti ndị ntụgharị DC-DC nwere ụzọ mgbanwe abụọ dị iche iche, PFM na PWM, bụ ndị a.
Ugboro PWM, usoro nhọrọ okirikiri ọrụ PFM.Ụdị ntụgharị PWM/PFM njikwa PFM na obere ibu yana mgbanwe akpaaka na njikwa PWM na ibu dị arọ.
3.
Kedu ihe dị iche n'etiti nkwalite nkwalite ICs na nkwalite nkwalite ICs asynchronous?
Isi ihe dị iche n'etiti nkwalite ICs synchronous na nkwalite asynchronous bụ ọdịiche dị na ụzọ mmezi.
The synchronous boost IC sekit na-eji MOS n'ihi na MOS tubes nwere nnọọ ala n'ime ime nguzogide na oghe ala na mfu na rectification usoro bụ nnọọ ala, ya mere arụmọrụ nke synchronous nkwalite dị elu na okpomọkụ ọgbọ dị ala.Enwere ike iji ya maka ngwa nkwalite ike dị elu.
Asynchronous boost IC sekit na-eji diodes maka mmezi.Diodes nwere mgbada voltaji junction na nhazi nhazi.Ihe dị elu dị ugbu a na nhazi nhazi, nke na-efunahụ ya.Ọtụtụ mgbe, ike enweghị ike ịbụ ike dị elu.
