Atilẹba Tuntun LM25118Q1MH/NOPB Integrated Circuit IC REG CTRLR BUCK 20TSSOP Ic Chip LM25118Q1MH/NOPB
Ọja eroja
| ORISI | Apejuwe |
| Ẹka | Awọn iyika Iṣọkan (ICs) |
| Mfr | Texas Instruments |
| jara | Oko, AEC-Q100 |
| Package | Tube |
| SPQ | 73 Tube |
| Ipo ọja | Ti nṣiṣe lọwọ |
| Ojade Irisi | Iwakọ Transistor |
| Išẹ | Igbesẹ-soke, Igbesẹ-isalẹ |
| O wu iṣeto ni | Rere |
| Topology | Buck, igbelaruge |
| Nọmba ti Ijade | 1 |
| Awọn ipele Ijade | 1 |
| Foliteji - Ipese (Vcc/Vdd) | 3V ~ 42V |
| Igbohunsafẹfẹ - Yipada | Titi di 500kHz |
| Yiyika Ojuse (Max) | 75% |
| Amuṣiṣẹpọ Rectifier | No |
| Aago amuṣiṣẹpọ | Bẹẹni |
| Tẹlentẹle Awọn atọkun | - |
| Iṣakoso Awọn ẹya ara ẹrọ | Mu ṣiṣẹ, Iṣakoso Igbohunsafẹfẹ, Ramp, Ibẹrẹ Asọ |
| Awọn iwọn otutu ti nṣiṣẹ | -40°C ~ 125°C (TJ) |
| Iṣagbesori Iru | Oke Oke |
| Package / Ọran | 20-PowerTSSOP (0.173 ", 4.40mm Ìbú) |
| Package Device Olupese | 20-HTSSOP |
| Nọmba Ọja mimọ | LM25118 |
1. Amuṣiṣẹpọ bucking
Awọn anfani.
Iṣiṣẹ giga: resistance ti inu ti mos tube jẹ kekere pupọ ati pe idinku foliteji lori ipinlẹ kere pupọ ju ju silẹ foliteji Cosmos iwaju ti diode Schottky.
Awọn alailanfani.
Iduroṣinṣin ti ko to: nilo lati ṣe apẹrẹ Circuit awakọ, ki o yago fun tube oke ati isalẹ ni akoko kanna, Circuit naa jẹ eka sii, ti o mu abajade iduroṣinṣin to.
2. ti kii-synchronous ẹtu
Awọn anfani.
Iṣiṣẹ kekere: Schottky diode foliteji ju silẹ tobi, ni ibatan si agbara agbara ti ipilẹṣẹ nipasẹ mos tube
Awọn alailanfani.
Iduroṣinṣin to gaju: kii yoo ni itọsi nigbakanna ti awọn tubes oke ati isalẹ.
1: PFM (ọna afọwọṣe igbohunsafẹfẹ pulse)
Yiyi pulse iwọn jẹ daju, nipa yiyipada awọn igbohunsafẹfẹ ti awọn polusi o wu, awọn ti o wu foliteji ti wa ni diduro.ti iru iṣakoso ni anfani ti lilo agbara kekere paapaa nigba lilo fun igba pipẹ, paapaa ni awọn ẹru kekere.
2: PWM (Awoṣe Iwọn Iwọn Pulse)
Iru iṣakoso PWM jẹ daradara daradara ati pe o ni ripple foliteji ti o dara ati ariwo.
Lati ṣe akopọ: Ni gbogbogbo, awọn iyatọ iṣẹ ṣiṣe laarin awọn oluyipada DC-DC pẹlu awọn ọna iyipada oriṣiriṣi meji, PFM ati PWM, jẹ atẹle yii.
Igbohunsafẹfẹ PWM, ọna yiyan ọmọ iṣẹ PFM.PWM/PFM iyipada iru PFM iṣakoso ni awọn ẹru kekere ati iyipada laifọwọyi si iṣakoso PWM ni awọn ẹru wuwo.
3.
Kini iyato laarin amuṣiṣẹpọ igbelaruge ICs ati asynchronous igbelaruge ICs?
Iyatọ akọkọ laarin awọn ICs igbelaruge amuṣiṣẹpọ ati awọn igbelaruge asynchronous jẹ iyatọ ninu awọn ọna atunṣe.
Imudarapọ amuṣiṣẹpọ IC Circuit nlo MOS nitori awọn tubes MOS ni iwọn kekere resistance ti inu ni ipo ṣiṣi ati awọn adanu ninu ilana atunṣe jẹ kekere pupọ, nitorinaa ṣiṣe ti igbelaruge amuṣiṣẹpọ jẹ giga ati iran ooru jẹ kekere.O le ṣee lo fun awọn ohun elo igbelaruge agbara giga.
Awọn iyika IC igbelaruge Asynchronous lo awọn diodes fun atunṣe.Diodes ni a junction foliteji ju ninu awọn rectification ilana.Ti o ga julọ lọwọlọwọ ni ilana atunṣe, ti o ga julọ awọn adanu.Nigbagbogbo, agbara ko le jẹ agbara giga.
