IC manufacturers Onsemi

IC manufacturers (98)

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,10%
(A)
RDC max.
(Ω)
fres
(MHz)
VersionApplicationInterface TypeTypeGenderPins
(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
9 files Active i| Production is active. Expected lifetime: >10 years.WE-TI Radial Leaded Wire Wound Inductor 1 8.5 8.5 0.015 140 Heat Shrinking Tube THT 6
7447462221SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-TI Radial Leaded Wire Wound Inductor 220 0.5 0.57 1.2 4.8 Heat Shrinking Tube THT 6
870025374005SPEC
8 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,10%
(A)
RDC max.
(Ω)
fres
(MHz)
VersionApplicationInterface TypeTypeGenderPins
(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