IC-Hersteller Onsemi

IC-Hersteller (99)

Onsemi NCP1361

Low Power Offline Constant Current PWM Current-Mode Controller with/without High Voltage Startup Current Source

Details

TopologieSperrwandler
Eingangsspannung90-375 V
Schaltfrequenz80-110 kHz
Ausgang 120 V / 4.5 A
IC-Revision1

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 ProduktserieL
(µH)
IR
(A)
ISAT
(A)
RDC max.
(Ω)
fres
(MHz)
VersionAnwendungInterface typTypGenderPins (Value)
(pcs)
MontageartIR 1
(A)
Arbeitsspannung
(V (AC))
VerpackungCVR
(V (DC))
Endurance
(h)
BetriebstemperaturIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Raster
(mm)
Ø D
(mm)
L
(mm)
Muster
7447462010SPEC
8 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-TI Tonneninduktivität 1 8.5 8 0.015 140 Schrumpfschlauch THT 6
7447462221SPEC
8 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-TI Tonneninduktivität 220 0.5 0.5 1.2 4.8 Schrumpfschlauch THT 6
870025374005SPEC
7 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WCAP-PTG5 Aluminium-Polymer-Kondensatoren Radial THT Ammopack330 µF 16 2000 -55 °C bis zu +105 °C 4500 528 8 3.5 8 8
614104150121SPEC
7 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WR-COM USB 2.0 Type A Horizontal THT Short Type 1.5 USB 2.0 Type A Horizontal - Short Type Receptacle 4 THT 1.5 30 Tape and Reel & Mylar -40 °C bis zu +85 °C
750315544SPEC
Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. Offline Transformer
Artikel Nr. Daten­blatt Simu­lation
7447462010SPEC
7447462221SPEC
870025374005SPEC
614104150121SPEC
750315544SPEC
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieL
(µH)
IR
(A)
ISAT
(A)
RDC max.
(Ω)
fres
(MHz)
VersionAnwendungInterface typTypGenderPins (Value)
(pcs)
MontageartIR 1
(A)
Arbeitsspannung
(V (AC))
VerpackungCVR
(V (DC))
Endurance
(h)
BetriebstemperaturIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Raster
(mm)
Ø D
(mm)
L
(mm)
Muster