LM25118Q1MH/NOPB Yophatikizana Circuit IC REG CTRLR BUCK 20TSSOP Ic Chip LM25118Q1MH/NOPB
Makhalidwe a Zamalonda
| TYPE | DESCRIPTION |
| Gulu | Magawo Ophatikizana (ICs) |
| Mfr | Texas Instruments |
| Mndandanda | Magalimoto, AEC-Q100 |
| Phukusi | Chubu |
| SPQ | 73 Tube |
| Mkhalidwe wa Zamalonda | Yogwira |
| Mtundu Wotulutsa | Woyendetsa Transistor |
| Ntchito | Yendani Pamwamba, Yang'anani Pansi |
| Kukonzekera kwa Zotulutsa | Zabwino |
| Topology | Buck, Boost |
| Chiwerengero cha Zotuluka | 1 |
| Zotuluka Gawo | 1 |
| Voltage - Supply (Vcc/Vdd) | 3V ~ 42V |
| pafupipafupi - Kusintha | Mpaka 500 kHz |
| Duty Cycle (Max) | 75% |
| Synchronous Rectifier | No |
| Kulunzanitsa koloko | Inde |
| Zithunzi za seri | - |
| Control Features | Yambitsani, Frequency Control, Ramp, Soft Start |
| Kutentha kwa Ntchito | -40°C ~ 125°C (TJ) |
| Mtundu Wokwera | Surface Mount |
| Phukusi / Mlandu | 20-PowerTSSOP (0.173", 4.40mm M'lifupi) |
| Phukusi la chipangizo cha Supplier | 20-HTSSOP |
| Nambala Yoyambira Yogulitsa | LM25118 |
1. Synchronous bucking
Ubwino wake.
Kuchita bwino kwambiri: kukana kwamkati kwa chubu cha mos ndikochepa kwambiri ndipo kutsika kwamagetsi paboma ndikocheperako kuposa kutsika kwamagetsi kwa Cosmos kwa Schottky diode.
Zoipa.
Kukhazikika kosakwanira: kufunikira kopanga dera loyendetsa, ndikupewa chubu chapamwamba ndi chotsika nthawi yomweyo, derali ndizovuta kwambiri, zomwe zimapangitsa kuti pakhale bata losakwanira.
2. tonde sanali synchronous
Ubwino wake.
Kuchita bwino pang'ono: Kutsika kwamagetsi a Schottky diode ndikokulirapo, poyerekeza ndi kugwiritsa ntchito mphamvu kopangidwa ndi mos chubu
Zoipa.
Kukhazikika kwapamwamba: sipadzakhalanso kuyendetsa nthawi imodzi kwa machubu apamwamba ndi apansi.
1: PFM (njira yosinthira pafupipafupi)
Kusintha kwa pulse m'lifupi ndikotsimikizika, posintha ma frequency a pulse linanena bungwe, voteji yotulutsa imakhazikika.mtundu wowongolera uli ndi mwayi wogwiritsa ntchito mphamvu zochepa ngakhale zitagwiritsidwa ntchito kwa nthawi yayitali, makamaka pazonyamula zing'onozing'ono.
2: PWM (Pulse Width Modulation)
Mtundu wowongolera wa PWM ndiwothandiza kwambiri ndipo umakhala ndi phokoso labwino lotulutsa mphamvu komanso phokoso.
Mwachidule: Mwambiri, kusiyana kwa magwiridwe antchito pakati pa otembenuza a DC-DC omwe ali ndi njira ziwiri zosinthira, PFM ndi PWM, ndi motere.
PWM pafupipafupi, PFM duty cycle kusankha njira.PWM/PFM kutembenuka kwa mtundu wa PFM kuwongolera pazonyamula zing'onozing'ono ndikusinthiratu kuwongolera kwa PWM pazolemetsa zolemetsa.
3.
Kodi pali kusiyana kotani pakati pa synchronous boost ICs ndi asynchronous boost ICs?
Kusiyana kwakukulu pakati pa synchronous boost ICs ndi ma asynchronous boosts ndi kusiyana kwa njira zokonzanso.
Dongosolo la synchronous boost IC limagwiritsa ntchito MOS chifukwa machubu a MOS amakhala otsika kwambiri mkati mwamalo otseguka ndipo zotayika pakukonzanso ndizotsika kwambiri, kotero kuti mphamvu ya synchronous boost ndi yayikulu ndipo kutulutsa kutentha kumakhala kochepa.Itha kugwiritsidwa ntchito pazowonjezera mphamvu zamagetsi.
Asynchronous boost IC mabwalo amagwiritsa ntchito ma diode kukonzanso.Ma diode amakhala ndi kutsika kwamagetsi olumikizirana panthawi yokonzanso.Kukwera kwamakono mu ndondomeko yokonzanso, kumapangitsanso kutaya.Kawirikawiri, mphamvu sizingakhale mphamvu zapamwamba.
