IC manufacturers Onsemi

IC manufacturers (99)

Onsemi NCP1361

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

Overview

TopologyFlyback Converter
Input voltage90-375 V
Switching frequency80-110 kHz
Output 120 V / 4.5 A
IC revision1

Description

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

Features

±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

Typical applications

  • Ac−dc USB chargers for Cell Phones, Tablets and camera
  • Low power ac−dc Adapters for Chargers.

More information

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC max.
(Ω)
fres
(MHz)
VersionApplicationInterface TypeTypeGenderPins (Value)
(pcs)
MountIR
(A)
Working Voltage
(V (AC))
PackagingCVR
(V (DC))
Endurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Pitch
(mm)
Ø D
(mm)
L
(mm)
Samples
7447462010SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-TI Radial Leaded Wire Wound Inductor 1 8.5 8 0.015 140 Heat Shrinking Tube THT 6
7447462221SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-TI Radial Leaded Wire Wound Inductor 220 0.5 0.5 1.2 4.8 Heat Shrinking Tube THT 6
870025374005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WCAP-PTG5 Aluminum Polymer Capacitors Radial THT Ammopack330 µF 16 2000 -55 °C up to +105 °C 4500 528 8 3.5 8 8
614104150121SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.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 up to +85 °C
750315544SPEC
Active i| Production is active. Expected lifetime: >10 years. Offline Transformer
Order Code Data­sheet Simu­lation
7447462010SPEC
7447462221SPEC
870025374005SPEC
614104150121SPEC
750315544SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC max.
(Ω)
fres
(MHz)
VersionApplicationInterface TypeTypeGenderPins (Value)
(pcs)
MountIR
(A)
Working Voltage
(V (AC))
PackagingCVR
(V (DC))
Endurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Pitch
(mm)
Ø D
(mm)
L
(mm)
Samples