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reference designNCP1568 | Demoboard DN05119/D

Onsemi NCP1568 | Demoboard DN05119/D

AC-DC Active Clamp Flyback PWM Controller

Overview

TopologyFlyback Converter
Input voltage90-265 V
Output 19 V / 3 A
Output 220 V / 3 A
Output 35 V / 3 A
Output 415 V / 3 A
IC revision4

Description

This design note describes a 60 W universal input 5 V, 9 V, 15 V and 20 V output ultra-high density power supply for laptop adapters. This featured power supply is an active-clamp flyback topology utilizing ON Semiconductor’s NCP1568 PWM controller, NCP51530 HB Driver, NCP4306 SR Controller and FDMS86202 SR FET. This design note provides complete circuit schematic, PCB, BOM and transformer information of the evaluation board. It also provide efficiency, transient response, output ripple and thermal data of the evaluation board.This design utilized NCP1568 and NCP51530 for the active-clamp flyback topology. Active-clamp flyback topology effectively recycles the leakage energy. Another feature of this topology is the ZVS operation of the power MOSFETS. Because of no leakage losses and ZVS operation, this topology is suited for high frequency operation which results in size reduction of the transformer. Hence active-clamp flyback topology is well suited for high power density sub 100 W power supplies. A ZVS fixed switching frequency power converter also simplifies EMI design and can be easily designed to avoid interference with other sensitive circuits in the system.

Features

  • Universal AC input operation (90 - 265 Vac)
  • High full load and average efficiency
  • Low standby power
  • Very low ripple and noise
  • High frequency operation up to 450 kHz
  • Inherent SCP and OCP protection
  • Thermal and OVP protection
  • Adaptive frequency operation based on AC input and output load conditions
  • Adaptive ZVS operation
  • Smaller EMI components
  • Smooth startup operation

Typical applications

  • AC-DC Power Conversion, USB Power Delivery

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
C
VR(V (DC))
Endurance(h)
IRIPPLE(mA)
ILeak(µA)
DF(%)
Pitch(mm)
Ø D(mm)
L(mm)
Packaging
Application
Interface Type
Type
Gender
Pins
Mount
PCB Thickness(mm)
IR(A)
Working Voltage(V (DC))
SamplesAvailability & Sample
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744316220
SPECWE-HCI SMT Flat Wire High Current Inductor, 2.2 µH, 9.2 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance2.2 µH
Performance Rated Current9.2 A
Saturation Current @ 10%3.5 A
Saturation Current @ 30%7.5 A
DC Resistance11.3 mΩ
Self Resonant Frequency108 MHz
MaterialSuperflux 
Packaging Unit1500 
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Length5.5 mm
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Pins2 
MountSMT 
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860021374009
SPECWCAP-ATG5 Aluminum Electrolytic Capacitors, –, –
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-ATG5 Aluminum Electrolytic Capacitors
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Packaging Unit800 
Capacitance6.8 µF
Rated Voltage400 V (DC)
Endurance 2000
Ripple Current75 mA
Leakage Current81.6 µA
Dissipation Factor15 %
Pitch3.5 mm
Diameter8 mm
Length14 mm
PackagingAmmopack 
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860080472003
SPECWCAP-ATLI Aluminum Electrolytic Capacitors, –, –
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-ATLI Aluminum Electrolytic Capacitors
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Packaging Unit2000 
Capacitance56 µF
Rated Voltage25 V (DC)
Endurance 2000
Ripple Current256 mA
Leakage Current14 µA
Dissipation Factor10 %
Pitch2 mm
Diameter5 mm
Length11 mm
PackagingAmmopack 
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632723300011
SPECWR-USB Type C Connectors, –, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

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Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-USB Type C Connectors
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Packaging Unit700 
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PackagingTape and Reel 
ApplicationUSB 3.1 
Interface TypeType C 
TypeHorizontal 
GenderReceptacle 
Pins24 
MountTHR 
PCB Thickness1.6 mm
Rated Current5 A
Working Voltage48 V (DC)
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750317295
SPECOffline Transformer, –, –
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Offline Transformer
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