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Onsemi NCP1361
Low Power Offline Constant Current PWM Current-Mode Controller with/without High Voltage Startup Current Source
Details
| Topologie | Sperrwandler |
| Eingangsspannung | 90-375 V |
| Schaltfrequenz | 80-110 kHz |
| Ausgang 1 | 20 V / 4.5 A |
| IC-Revision | 1 |
Beschreibung
The NCP1361/66 offers a new solution targeting output powerlevels from a few watts up to 20 W in a universal−mains flybackapplication. Due to a novel method this new controller offers aprimary−side constant current control, saving secondary−sidecomponents to perform current regulation.The NCP1361/66 operates in valley−lockout quasi−resonant peakcurrent mode control mode at nominal load to provide high efficiency.When the secondary−side power starts diminishing, the switchingfrequency naturally increases until a voltage−controlled oscillator(VCO) takes the lead, synchronizing the MOSFET turn−on in adrain−source voltage valley. The frequency is thus reduced bystepping into successive valleys until the number 4 is reached. Beyondthis point, the frequency is linearly decreased in valley−switchingmode until a minimum is hit. Valley lockout during the first fourdrain−source valleys prevents erratic discrete jumps and providesgood efficiency in lighter load situations
Eigenschaften
±10% Current Regulation
- 560 V Startup Current Source
- No Frequency Clamp, 80 or 110 kHz Maximum SwitchingFrequency Options
- Quasi−Resonant Operation with Valley SwitchingOperation
- Fixed Peak Current & Deep Frequency Foldback @Light Load Operation.
- External Constant Voltage Feedback Adjustment
- Cycle by Cycle Peak Current Limit
- Built−In Soft−Start
- Over & Under Output Voltage Protection
- Wide Operation VCC Range (up to 28 V)
- Low Start−up Current (2.5 A typ.) with NCP1361
- Clamped Gate−drive Output for MOSFET
- CS & Vs/ZCD pin Short and Open Protection
- Internal Temperature Shutdown
- Less than 30 mW No−Load Performance at High Linewith NCP1366 Version
- These are Pb−Free Devices
Typische Anwendungen
- Ac−dc USB chargers for Cell Phones, Tablets and camera
- Low power ac−dc Adapters for Chargers.
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | C | VR(V (DC)) | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | DF(%) | Raster(mm) | Ø D(mm) | L(mm) | Verpackung | Interface typ | Typ | Ausführung | Gender | Pins | Montageart | Arbeitsspannung(V (AC)) | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Tonneninduktivität, 1 µH, 8.5 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-TI Tonneninduktivität | Induktivität1 µH | Nennstrom8.5 A | Sättigungsstrom 18.5 A | Gleichstromwiderstand0.015 Ω | Eigenresonanzfrequenz140 MHz | VersionSchrumpfschlauch | – | – | – | – | – | – | – | – | Länge6 mm | – | – | – | – | – | – | MontageartTHT | – | ||||
| WE-TI Tonneninduktivität, 220 µH, 0.5 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-TI Tonneninduktivität | Induktivität220 µH | Nennstrom0.5 A | Sättigungsstrom 10.57 A | Gleichstromwiderstand1.2 Ω | Eigenresonanzfrequenz4.8 MHz | VersionSchrumpfschlauch | – | – | – | – | – | – | – | – | Länge6 mm | – | – | – | – | – | – | MontageartTHT | – | ||||
 | WCAP-PTG5 Aluminium-Polymer-Kondensatoren, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-PTG5 Aluminium-Polymer-Kondensatoren | – | – | – | – | – | – | Kapazität330 µF | Nennspannung16 V (DC) | Endurance 2000 | Rippelstrom4500 mA | Leckstrom528 µA | Verlustfaktor8 % | Raster3.5 mm | Durchmesser8 mm | Länge8 mm | VerpackungAmmopack | – | – | – | – | – | MontageartRadial THT | – | ||||
 | WR-USB Standard Connectors, –, 1.5 A | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-USB Standard Connectors | – | Nennstrom1.5 A | – | – | – | – | – | – | – | – | – | – | – | – | – | VerpackungTape and Reel & Mylar | Interface typType A | TypHorizontal - Short Type | AusführungMit Clips | GenderBuchse | Pins4 | MontageartTHT | Arbeitsspannung30 V (AC) | |||
750315544 | Offline Transformer, –, – | Simulation– | Downloads– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | Produktserie Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |