EVAL3AR2280VJZTOBO1

AN - EVAL IC E3AR228 0 VJZ 2 0 W 5 V SMPS Eva lua ti on Board wi th IC E3AR2280VJZ Application Note About this document Scope and purpose This document is an engineering report that describes universal input 20 W 5 V off-line flyback converter using Infineon CoolSET™ F3R80 family, ICE3AR2280VJZ. The converter is operated in Discontinuous Conduction Mode, 100 kHz fixed frequency, very low standby power and various mode of protections for a high reliable system. This evaluation board is designed to evaluate the performance of ICE3AR2280VJZ in ease of use. Intended audience This document is intended for users of the ICE3AR2280VJZ who wish to design low cost and high reliable systems of off-line SMPS for enclosed adapter or open frame auxiliary power supply of white goods, PC, server, DVD, TV, Set-top box, etc. Table of Contents About this document ................................................................................................................... 1 Table of Contents ........................................................................................................................ 1 1 Abstract ..................................................................................................................... 3 2 Evaluation board ........................................................................................................ 3 3 Specifications of evaluation board ................................................................................ 4 4 Features of ICE3AR2280VJZ .......................................................................................... 4 5 5.1 5.2 5.3 5.4 5.5 5.6 Circuit description....................................................................................................... 5 Introduction ............................................................................................................................................... 5 Line input ................................................................................................................................................... 5 Line input over voltage protection .......................................................................................................... 5 Start up ....................................................................................................................................................... 5 Operation mode ........................................................................................................................................ 5 Soft start ..................................................................................................................................................... 5 1 Revision 1.2, 2015-05-12 20 W 5 V SMPS Evaluation Board with ICE3AR2280VJZ Abstract 5.7 5.8 5.9 RCD clamper circuit................................................................................................................................... 5 Peak current control of primary current................................................................................................. 6 Output stage .............................................................................................................................................. 6 6 Circuit diagram ........................................................................................................... 7 7 7.1 7.2 PCB layout ................................................................................................................. 8 Top side ...................................................................................................................................................... 8 Bottom side................................................................................................................................................ 8 8 Bill of material (BOM) .................................................................................................. 9 9 Transformer construction .......................................................................................... 11 10 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 Test results .............................................................................................................. 12 Efficiency, regulation and output ripple ...............................................................................................12 Standby power ........................................................................................................................................13 Line regulation.........................................................................................................................................14 Load regulation .......................................................................................................................................14 Maximum power......................................................................................................................................15 ESD immunity (EN61000-4-2) .................................................................................................................15 Surge immunity (EN61000-4-5)..............................................................................................................15 Conducted emissions (EN55022 class B) ..............................................................................................16 Thermal measurement ...........................................................................................................................18 11 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 11.10 11.11 11.12 Waveforms and scope plots ........................................................................................ 19 Startup at low/high AC line input voltage with maximum load .........................................................19 Soft start ...................................................................................................................................................19 Frequency jittering ..................................................................................................................................20 Drain and current sense voltage at maximum load ............................................................................20 Load transient response (Dynamic load from 10% to 100%) .............................................................21 Output ripple voltage at maximum load ..............................................................................................21 Output ripple voltage during burst mode at 1 W load ........................................................................22 Active Burst mode operation .................................................................................................................22 VCC over voltage protection (Odd skip auto restart mode) .................................................................23 Over load protection (Auto restart mode) ............................................................................................23 VCC under voltage/Short optocoupler protection (Normal auto restart mode) ................................24 AC Line input OVP mode .........................................................................................................................24 12 References ............................................................................................................... 25 Revision History........................................................................................................................ 25 Application Note 2 Revision 1.2, 2015-05-12 20 W 5 V SMPS Evaluation Board with ICE3AR2280VJZ Abstract 1 Abstract This document is an engineering report of a universal input 20 W 5 V off-line flyback converter power supply utilizing F3R80 CoolSET™ ICE3AR2280VJZ. The application evaluation board is operated in Discontinuous Conduction Mode (DCM) and is running at 100 kHz switching frequency. It has a single output voltage with secondary side control regulation. It is especially suitable for small power supply such as DVD player, set-top box, game console, charger and auxiliary power of white goods, server, PC and high power system, etc. The ICE3AR2280VJZ is the latest version of the CoolSET™. Besides having the basic features of the F3R CoolSET™ such as Active Burst Mode, propagation delay compensation, soft gate drive, auto restart protection for major fault (VCC over voltage, VCC under voltage, adjustable input OVP, over temperature, over-load, open loop and short opto-coupler), it also has the BiCMOS technology design, selectable entry and exit burst mode level, adjustable AC line input over voltage protection feature, built-in soft start time, built-in and extendable blanking time and frequency jitter feature, etc. The particular features are the Best-in-Class low standby power and the good EMI performance. 2 Evaluation board This document contains the list of features, the power supply specification, schematic, bill of material and the transformer construction documentation. Typical operating characteristics such as performance curve and scope waveforms are showed at the rear of the report. Figure 1 EVAL ICE3AR2280VJZ Application Note 3 Revision 1.2, 2015-05-12 20 W 5 V SMPS Evaluation Board with ICE3AR2280VJZ Specifications of evaluation board 3 Table 1 Specifications of evaluation board Specifications of EVAL ICE3AR2280VJZ Input voltage 85 VAC~265 VAC Input frequency 50~60 Hz Output voltage 5V Output current 4A Output power 20 W Steady state output ripple voltage (±1% of norminal output voltage) Vripple_P_P< 50 mV Dynamic load response undershoot and overshoot (±3% of norminal output voltage) Vripple_P_P< 200 mV Active mode four point average efficiency (25%,50%,75% and 100%load) (EU CoC Version 5, Tier 1) Active mode at 10% load efficiency (EU CoC Version 5, Tier 1) >82% at 115 VAC and 230 VAC >74% No-load power consumption (EU CoC Version 5, Tier 2) < 75 mW Maximum input power(Peak Power) for universal input range (