CoolS ET ™ F3R Famil y ICE3RBR4765JZ 12V 12W SMPS e va l uat ion boar d wit h I CE3RB R4765J Z ANPS0078 Appl icat ion Not e AN - EVAL- 3RB R4765JZ V1.1, 2013-07-15 Po wer Manag em ent & Mult im ar k et Edition 2013-07-15 Published by Infineon Technologies AG, 81726 Munich, Germany. © 2013 Infineon Technologies AG All Rights Reserved. LEGAL DISCLAIMER THE INFORMATION GIVEN IN THIS APPLICATION NOTE IS GIVEN AS A HINT FOR THE IMPLEMENTATION OF THE INFINEON TECHNOLOGIES COMPONENT ONLY AND SHALL NOT BE REGARDED AS ANY DESCRIPTION OR WARRANTY OF A CERTAIN FUNCTIONALITY, CONDITION OR QUALITY OF THE INFINEON TECHNOLOGIES COMPONENT. THE RECIPIENT OF THIS APPLICATION NOTE MUST VERIFY ANY FUNCTION DESCRIBED HEREIN IN THE REAL APPLICATION. INFINEON TECHNOLOGIES HEREBY DISCLAIMS ANY AND ALL WARRANTIES AND LIABILITIES OF ANY KIND (INCLUDING WITHOUT LIMITATION WARRANTIES OF NON-INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY) WITH RESPECT TO ANY AND ALL INFORMATION GIVEN IN THIS APPLICATION NOTE. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Trademarks of Infineon Technologies AG AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, EconoPACK™, CoolMOS™, CoolSET™, CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPIM™, EconoPACK™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, I²RF™, ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OptiMOS™, ORIGA™, POWERCODE™; PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™, RASIC™, ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SmartLEWIS™, SOLID FLASH™, TEMPFET™, thinQ!™, TRENCHSTOP™, TriCore™. Other Trademarks Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™, PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum. COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™ of Epcos AG. FLEXGO™ of Microsoft Corporation. FlexRay™ is licensed by FlexRay Consortium. HYPERTERMINAL™ of Hilgraeve Incorporated. IEC™ of Commission Electrotechnique Internationale. IrDA™ of Infrared Data Association Corporation. ISO™ of INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. MATLAB™ of MathWorks, Inc. MAXIM™ of Maxim Integrated Products, Inc. MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. MIPI™ of MIPI Alliance, Inc. MIPS™ of MIPS Technologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™ (MWO) of Applied Wave Research Inc., OmniVision™ of OmniVision Technologies, Inc. Openwave™ Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Satellite Radio Inc. SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA, Inc. TEKTRONIX™ of Tektronix Inc. TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™ of Cadence Design Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited. Last Trademarks Update 2011-11-11 Application Note AN-EVAL-3RBR4765JZ 3 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Revision History Major changes since previous revision Date Version Changed By Change Description 15 Jul 2013 1.1 Kyaw Zin Min update format, remove appendix We Listen to Your Comments Is there any information in this document that you feel is wrong, unclear or missing? Your feedback will help us to continuously improve the quality of our documentation. Please send your proposal (including a reference to this document title/number) to: [email protected] Application Note AN-EVAL-3RBR4765JZ 4 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Table of Contents Revision History .............................................................................................................................................. 4 Table of Contents ............................................................................................................................................ 5 1 Abstract ........................................................................................................................................ 7 2 Evaluation board .......................................................................................................................... 7 3 List of features ............................................................................................................................. 8 4 Technical specifications .............................................................................................................. 8 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 Circuit description ....................................................................................................................... 9 Introduction .................................................................................................................................... 9 Line input ....................................................................................................................................... 9 Start up .......................................................................................................................................... 9 Operation mode ............................................................................................................................. 9 Soft start ........................................................................................................................................ 9 RCD clamper circuit ....................................................................................................................... 9 Peak current control of primary current ........................................................................................... 9 Output stage .................................................................................................................................. 9 Feedback and regulation .............................................................................................................. 10 Blanking window for load jump ..................................................................................................... 10 Active burst mode ........................................................................................................................ 10 Jitter mode ................................................................................................................................... 10 Protection modes ......................................................................................................................... 10 6 Circuit diagram........................................................................................................................... 12 7 7.1 7.2 PCB layout.................................................................................................................................. 13 Top side ....................................................................................................................................... 13 Bottom side .................................................................................................................................. 13 8 Component list ........................................................................................................................... 14 9 Transformer construction .......................................................................................................... 15 10 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 Test results................................................................................................................................. 16 Efficiency ..................................................................................................................................... 16 Input standby power ..................................................................................................................... 17 Line regulation ............................................................................................................................. 18 Load regulation ............................................................................................................................ 18 Maximum input power .................................................................................................................. 19 Electrostatic discharge/ESD test (EN6100-4-2)............................................................................. 19 Surge/Lightning strike test (EN61000-4-5) .................................................................................... 19 Conducted emissions (EN55022 class-B) ..................................................................................... 20 11 11.1 11.2 11.3 11.4 11.5 11.6 Waveforms and scope plots ...................................................................................................... 22 Start up at low and high AC line input voltage and maximum load................................................. 22 Soft start at low and high AC line input voltage and maximum load ............................................... 22 Frequency jittering........................................................................................................................ 23 Drain voltage and current @ maximum load ................................................................................. 23 Load transient response (Dynamic load from 10% to 100%) ......................................................... 24 Output ripple voltage at maximum load......................................................................................... 24 Application Note AN-EVAL-3RBR4765JZ 5 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 11.7 11.8 11.9 11.10 11.11 11.12 11.13 Output ripple voltage during burst mode at 1 W load..................................................................... 25 Entering active burst mode ........................................................................................................... 25 Vcc overvoltage protection ........................................................................................................... 26 Over load protection (built-in + extended blanking time) ................................................................ 26 Open loop protection .................................................................................................................... 27 VCC under voltage/Short optocoupler protection ............................................................................ 27 Auto restart enable ....................................................................................................................... 28 12 References ................................................................................................................................. 28 Application Note AN-EVAL-3RBR4765JZ 6 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Abstract 1 Abstract This document is an engineering report of a universal input 12V 12W off-line flyback converter power supply utilizing IFX F3R CoolSET™ ICE3RBR4765JZ. The application demo board is operated in Discontinuous Conduction Mode (DCM) and is running at 65 kHz switching frequency. It has a one 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 high power system, etc. The ICE3RBR4765JZ 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 serious fault (Vcc over voltage protection, Vcc under voltage protection, over temperature, over-load, open loop and short opto-coupler), it also has the BiCMOS technology design, built-in soft start time, built-in and extendable blanking time, frequency jitter feature with built-in jitter period and external auto-restart enable, etc. The particular features needs to be stressed are the best in class low standby power and the good EMI performance. 2 Evaluation board Figure 1 – EVAL3RBR4765JZ 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. Application Note AN-EVAL-3RBR4765JZ 7 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 List of features 3 List of features 650V avalanche rugged CoolMOS™ with built-in Startup Cell Active Burst Mode for lowest Standby Power Fast load jump response in Active Burst Mode 65 kHz internally fixed switching frequency Auto Restart Protection Mode for Overload, Open Loop, Vcc Undervoltage, Overtemperature & Vcc Overvoltage Built-in Soft Start Built-in blanking window with extendable blanking time for short duration high current External auto-restart enable pin Max Duty Cycle 75% Overall tolerance of Current Limiting < ±5% Internal PWM Leading Edge Blanking BiCMOS technology provides wide VCC range Built-in Frequency jitter feature and soft driving for low EMI 4 Technical specifications Input voltage 85VAC~265VAC Input frequency 60Hz Input Standby Power < 50mW at no load Output voltage 12V Output current 1A Output power 12W Active mode average efficiency(25%,50%,75% & 100%load) >84% Output ripple voltage < 50mVp-p Application Note AN-EVAL-3RBR4765JZ 8 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Circuit description 5 Circuit description 5.1 Introduction The EVAL3RBR4765JZ demo board is a low cost off line flyback switch mode power supply ( SMPS ) using the ICE3RBR4765JZ integrated power IC from the CoolSET™-F3R family. The circuit, shown in Figure 2, details a 12V, 12W power supply that operates from an AC line input voltage range of 85Vac to 265Vac, suitable for applications in open frame supply or enclosed adapter. 5.2 Line input The AC line input side comprises the input fuse F1 as over-current protection. The choke L11, X-capacitor C11 and Y-capacitor C12 act as EMI suppressors. Optional surge absorber device SA1, SA2 and varistor VAR can absorb high voltage stress during lightning surge test. A rectified DC voltage (120V ~ 374V) is obtained through the bridge rectifier BR1 and the input bulk capacitor C13. 5.3 Start up Since there is a built-in startup cell in the ICE3RBR4765JZ, there is no need for external start up resistors. The startup cell is connecting the drain pin of the IC. Once the voltage is built up at the Drain pin of the ICE3RBR4765JZ, the startup cell will charge up the Vcc capacitor C16 and C17. When the Vcc voltage exceeds the UVLO at 18V, the IC starts up. Then the Vcc voltage is bootstrapped by the auxiliary winding to sustain the operation. 5.4 Operation mode During operation, the Vcc pin is supplied via a separate transformer winding with associated rectification D12 and buffering C16, C17. Resistor R12 is used for current limiting. In order not to exceed the maximum voltage at Vcc pin, an external zener diode ZD11 and resistor R13 can be added. 5.5 Soft start The Soft-Start is a built-in function and is set at 20ms. 5.6 RCD clamper circuit While turns off the CoolMOS®, the clamper circuit R11, C15 and D11 absorbs the current caused by transformer leakage inductance once the voltage exceeds clamp capacitor voltage. Finally drain-source voltage of CoolMOS™is lower than maximum break down voltage of CoolMOS®. 5.7 Peak current control of primary current The CoolMOS™drain source current is sensed via external shunt resistors R14 and R15 which determine the tolerance of the current limit control. Since ICE3RBR4765JZ is a current mode controller, it would have a cycleby-cycle primary current and feedback voltage control and can make sure the maximum power of the converter is controlled in every switching cycle. Besides, the patented propagation delay compensation is implemented to ensure the maximum input power can be controlled in an even tighter manner throughout the wide range input voltage. The demo board shows approximately +/-0.5% (refer to Figure 12). 5.8 Output stage On the secondary side the power is coupled out by a schottky diode D21. The capacitor C22 provides energy buffering following with the LC filter L21 and C24 to reduce the output voltage ripple considerably. Storage capacitor C22 is selected to have an internal resistance as small as possible (ESR) to minimize the output voltage ripple. Application Note AN-EVAL-3RBR4765JZ 9 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Circuit description 5.9 Feedback and regulation The output voltage is controlled using a TL431 (IC21). This device incorporates the voltage reference as well as the error amplifier and a driver stage. Compensation network C25, C26, R24, R25, R26 and R27 constitutes the external circuitry of the error amplifier of IC21. This circuitry allows the feedback to be precisely matched to dynamically varying load conditions and provides stable control. The maximum current through the optocoupler diode and the voltage reference is set by using resistors R22 and R23. Optocoupler IC12 is used for floating transmission of the control signal to the “Feedback” input via capacitor C18 of the ICE3RBR4765JZ control device. The optocoupler used meets DIN VDE 884 requirements for a wider creepage distance. 5.10 Blanking window for load jump In case of Load Jumps the Controller provides a Blanking Window before activating the Over Load Protection and entering the Auto Restart Mode. The blanking time is built-in at 20ms. If a longer blanking time is required, a capacitor, C19 can be added to BA pin to extend it. The extended time can be achieved by an internal 13µA constant current at BA pin to charge C19 ( CBK =47nF) from 0.9V to 4.0V. Thus the overall blanking time is the addition of 20ms and the extended time. The voltage at Feedback pin can rise above 4.3V without switching off due to over load protection within this blanking time frame. During the operation the transferred power is limited to the maximum peak current defined by the value of the current sense resistor, R14 and R15. Tblanking Basic Extended 20ms 5.11 (4.00.9)*CBK 20ms 238461.5 * CBK 31.2ms IBK Active burst mode At light load condition, the SMPS enters into Active Burst Mode. At this start, the controller is always active and thus the VCC must always be kept above the switch off threshold VCCoff ≥ 10.5V. During active burst mode, the efficiency increases significantly and at the same time it supports low ripple on VOUT and fast response on load jump. When the voltage level at FB falls below 1.35V, the internal blanking timer starts to count. When it reaches the built-in 20ms blanking time, it will enter Active Burst Mode. The Blanking Window is generated to avoid sudden entering of Burst Mode due to load jump. During Active Burst Mode the current sense voltage limit is reduced from 1.03V to 0.34V so as to reduce the conduction losses and audible noise. All the internal circuits are switched off except the reference and bias voltages to reduce the total VCC current consumption to below 450µA. At burst mode, the FB voltage is changing like a saw tooth between 3 and 3.5V. To leave Burst Mode, FB voltage must exceed 4V. It will reset the Active Burst Mode and turn the SMPS into Normal Operating Mode. Maximum current can then be provided to stabilize VOUT. 5.12 Jitter mode The ICE3RBR4765JZ has frequency jittering feature to reduce the EMI noise. The jitter frequency is internally set at 65 kHz (+/- 2.6 kHz) and the jitter period is set at 4ms. 5.13 Protection modes Protection is one of the major factors to determine whether the system is safe and robust. Therefore sufficient protection is necessary. ICE3RBR4765JZ provides all the necessary protections to ensure the system is operating safely. The protections include Vcc overvoltage, overtemperature, overload, open loop, Vcc undervoltage, short optocoupler, etc. When those faults are found, the system will go into auto restart which means the system will stop for a short period of time and restart again. If the fault persists, the system will stop again. It is then until the fault is removed, the system resumes to normal operation. A list of protections and the failure conditions are showed in the below table. Application Note AN-EVAL-3RBR4765JZ 10 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Circuit description Protection function Failure condition Vcc Overvoltage 1. Vcc > 20.5V & FB > 4.0V & during soft start period 2. Vcc > 25.5V Auto Restart Overtemperature (controller junction) TJ > 130°C Auto Restart Overload / Open loop VFB > 4.0V and VBA > 4.0V (Blanking time counted from charging VBA from 0.9V to 4.0V ) Auto Restart Vcc Undervoltage / Short Optocoupler Vcc < 10.5V Auto Restart Auto-restart enable VBA < 0.33V Auto Restart Application Note AN-EVAL-3RBR4765JZ Protection Mode 11 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Circuit diagram 6 Circuit diagram Figure 2 – 12W 12V ICE3RBR4765JZ power supply schematic Application Note AN-EVAL-3RBR4765JZ 12 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 PCB layout N.B. : In order to get the optimized performance of the CoolSET™, the grounding of the PCB layout must be connected very carefully. From the circuit diagram above, it indicates that the grounding for the CoolSET™can be split into several groups; signal ground, Vcc ground, Current sense resistor ground and EMI return ground. All the split grounds should be connected to the bulk capacitor ground separately. Signal ground includes all small signal grounds connecting to the CoolSET™GND pin such as filter capacitor ground, C17, C18, C19 and opto-coupler ground. Vcc ground includes the Vcc capacitor ground, C16 and the auxiliary winding ground, pin 2 of the power transformer. Current Sense resistor ground includes current sense resistor R14 and R15. EMI return ground includes Y capacitor, C12. 7 PCB layout 7.1 Top side Figure 3 – Top side component legend 7.2 Bottom side Figure 4 – Bottom side copper and component legend Application Note AN-EVAL-3RBR4765JZ 13 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Component list 8 Component list Component Description No. Designator 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 +12V BR1 C11 C12 C13 C15 C16 C17 C18 C19 C22 C24 C25 C26 Com D11 D12 D21 F1 12V Test Point 600V/1A 100nF/305V 2.2nF 250V 33uF/450V 2.2nF/630V 22uF/50V 100nF/63V 1nF/63V 47nF/63V 1000uF 16V 330uF 25V 220nF 63V 1nF 63V Com Test Point 600V/0.8A 150V/0.5A 100V/20A 250V/1A Footprint Part Number 5005 S1VBA60 B329221C3104+*** DE1E3KX222MA4BL01 450BXC33MEFC16X25 GRM31A7U2J222JW31D 50PX22MEFC5X11 SHINDENGEN EPCOS MURATA RUBYCON MURATA RUBYCON B41889A4108M 25ZL330MEFC8X16 EPCOS RUBYCON 5006 D1NK60 SHINDENGEN TO220 heat sink ICE3RBR4765JZ SFH617 A3 TL431 Connector 1V MKT5/18/15 MKT2/13/10 RB16X25 1206 RB5.5 0603 0603 0603 RB10.5 RB8 0603 0603 Connector DIODE0.4 1206D TO-220/3 MKT4.3/8.4/5 Axial 0.4_V_FB HS TO220 DIP7 DIP4 TO92-TL431- 20 L21 Ferrite bead 21 22 23 24 HS1 IC11 IC12 IC21 25 26 27 28 30 31 32 33 34 35 36 37 L N L11 R11 R12 R14,R15 R22 R23 R24 R25 R26 R27 Connector 39mH/0.6A 150k/1W 18R 2R7/0.25W/1% 820R 1.2k 68k 75k 20k 1k Connector EMI_C_U21 1218 0603 1206 0603 0603 0603 AXIAL0.3 0603 0603 TR1 882µH(66:11:16) TR_EF20_H Application Note AN-EVAL-3RBR4765JZ Manufacturer Quantity 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Fair-Rite(2743002111) 1 576802B00000G ICE3RBR4765JZ 1 1 1 1 INFINEON B82731M2601A030 EPCOS 750341844, Rev00 Wurth Electronics Midcom 14 1 1 1 1 2 1 1 1 1 1 1 1 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Transformer construction 9 Transformer construction Core and material: EE20/10/6(EF20), TP4A (TDG) Bobbin: 070-4989(10-Pin, THT, Horizontal version) Primary Inductance, Lp=882μH (±10%), measured between pin 4 and pin 5 Manufacturer and part number: Wurth Electronics Midcom (750341844, Rev00) Transformer specifications: Figure 5 – Transformer structure Application Note AN-EVAL-3RBR4765JZ 15 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Test results 10 Test results 10.1 Efficiency Figure 6 – Efficiency Vs. AC line input voltage Figure 7 – Efficiency Vs. output power @ 115Vac and 230Vac Application Note AN-EVAL-3RBR4765JZ 16 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Test results 10.2 Input standby power Figure 8 – Input standby power @ no load Vs. AC line input voltage ( measured by Yokogawa WT210 power meter - integration mode ) Figure 9 – Input standby power @ 0.5W, 1W & 2W Vs. AC line input voltage ( measured by Yokogawa WT210 power meter - integration mode ) Application Note AN-EVAL-3RBR4765JZ 17 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Test results 10.3 Line regulation Figure 10 – Line regulation Vout @ full load vs. AC line input voltage 10.4 Load regulation Figure 11 – Load regulation Vout vs. output power Application Note AN-EVAL-3RBR4765JZ 18 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Test results 10.5 Maximum input power Figure 12 – Maximum input power ( before overload protection ) vs. AC line input voltage 10.6 Electrostatic discharge/ESD test (EN6100-4-2) Pass (Special level (12kV) for contact discharge) 10.7 Surge/Lightning strike test (EN61000-4-5) Pass (Installation class 3, 2kV for line to earth) Pass (Installation class 4, 4kV for line to earth with surge absorber device; SA1 & SA2 (SSA601M)) Application Note AN-EVAL-3RBR4765JZ 19 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Test results 10.8 Conducted emissions (EN55022 class-B) The conducted emissions was measured by Schaffner (SMR4503) and followed the test standard of EN55022 (CISPR 22) class B. The demo board was set up at maximum load (12W) with input voltage of 115Vac and 230Vac. Figure 13 – Maximum load (12W) with 115 Vac (Line) Figure 14 – Maximum load (12W) with 115 Vac (Neutral) Application Note AN-EVAL-3RBR4765JZ 20 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Test results Figure 15 – Maximum load (12W) with 230 Vac (Line) Figure 16 – Maximum load (12W) with 230 Vac (Neutral) Pass conducted emissions EN55022 (CISPR 22) class B with > 10dB margin. Application Note AN-EVAL-3RBR4765JZ 21 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Waveforms and scope plots 11 Waveforms and scope plots All waveforms and scope plots were recorded with a LeCroy 6050 oscilloscope 11.1 Start up at low and high AC line input voltage and maximum load 502ms 502ms Channel Channel Channel Channel 1; C1 : Drain voltage (VDrain) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Channel Channel Channel Channel 1; C1 : Drain voltage (VDrain) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Startup time = 502ms Startup time = 502ms Figure 17 – Startup @ 85Vac & max. load Figure 18 – Startup @ 265Vac & max. load 11.2 Soft start at low and high AC line input voltage and maximum load 18ms Channel Channel Channel Channel 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) 18ms Channel Channel Channel Channel 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Soft Start time = 18ms Soft Start time = 18ms Figure 19 – Soft Start @ 85Vac & max. load Figure 20– Soft Start @ 265Vac & max. load Application Note AN-EVAL-3RBR4765JZ 22 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Waveforms and scope plots 11.3 Frequency jittering 71kHz 71kHz 3.8ms 3.8ms 66kHz 66kHz Channel 1; C1 : Drain to source voltage (VDS) Channel F2 : Frequency track of C1 Channel 1; C1 : Drain to source voltage (VDS) Channel F2 : Frequency track of C1 Frequency jittering from 66 kHz ~ 71kHz, Jitter period is 3.8ms Frequency jittering from 66 kHz ~ 71kHz, Jitter period is 3.8ms Figure 21 – Frequency jittering @ 85Vac and max. load Figure 22 – Frequency jittering @ 265Vac and max. load 11.4 Drain voltage and current @ maximum load Channel 1; C1 : Drain Voltage ( VD ) Channel 2; C2 : Drain Current ( ID ) Duty cycle = 43%, VDS_peak=234V Figure 23 – Operation @ Vin = 85Vac and max. load Application Note AN-EVAL-3RBR4765JZ Channel 1; C1 : Drain Voltage ( VD ) Channel 2; C2 : Drain Current ( ID ) Duty cycle = 10% VDS_peak=523V Figure 24 – Operation @ Vin = 265Vac and max. load 23 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Waveforms and scope plots 11.5 Load transient response (Dynamic load from 10% to 100%) Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk=129mV (Load change from10% to 100%,100Hz,0.4A/μS slew rate) Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 25 – Load transient response @ 85Vac 11.6 Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk=129mV (Load change from10% to 100%,100Hz,0.4A/μS slew rate) Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 26 – Load transient response @ 265Vac Output ripple voltage at maximum load Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 1; C1 : Output ripple Voltage ( Vo ) Vripple_pk_pk=24mV Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 27 – AC output ripple @ Vin=85Vac and max. load Vripple_pk_pk=25.6mV Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 28 – AC output ripple @ Vin=265Vac and max. load Application Note AN-EVAL-3RBR4765JZ 24 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Waveforms and scope plots 11.7 Output ripple voltage during burst mode at 1 W load Channel 1; C1 : Output ripple Voltage ( Vo ) Vripple_pk_pk=44mV Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Channel 1; C1 : Output ripple Voltage ( Vo ) Vripple_pk_pk = 50mV Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 29 – AC output ripple @ 85Vac and 1W load Figure 30 – AC output ripple @ 265Vac and 1W load 11.8 Entering active burst mode Channel 1; C1 : Current sense voltage (VCS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Blanking time to enter burst mode : 18ms (load step down from 1A to 0.0625A) Figure 31 – Active burst mode @ 85Vac Application Note AN-EVAL-3RBR4765JZ Channel 1; C1 : Current sense voltage (VCS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Blanking time to enter burst mode : 18ms (load step down from 1A to 0.0625A) Figure 32 – Active burst mode @ Vin=265Vac 25 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Waveforms and scope plots 11.9 Vcc overvoltage protection VCC OVP2 VCC OVP1 Channel 1; C1 : Current sense voltage (VCS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) VCC OVP2 first & follows VCC OVP1 (R25 disconnected during system operating at no load) Figure 33 – Vcc overvoltage protection @ 85Vac 11.10 VCC OVP2 VCC OVP1 Channel 1; C1 : Current sense voltage (VCS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) VCC OVP2 first & follows VCC OVP1 (R25 disconnected during system operating at no load) Figure 34 – Vcc overvoltage protection @ 265Vac Over load protection (built-in + extended blanking time) Channel 1; C1 : Current sense voltage (VCS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Over load protection with 28ms(18+10) blanking time (output load change from 1A to 1.5A) Figure 35 – Over load protection with built-in+extended blanking time @ 85Vac Application Note AN-EVAL-3RBR4765JZ Channel 1; C1 : Current sense voltage (VCS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Over load protection with 28ms(18+10) blanking time (output load change from 1A to 1.5A) Figure 36 – Over load protection with built-in+extended blanking time @ 265Vac 26 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 Waveforms and scope plots 11.11 Channel Channel Channel Channel Open loop protection 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Channel Channel Channel Channel 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Open loop protection (R25 disconnected during system operation at max. load) – over load protection Open loop protection (R25 disconnected during system operation at max. load) – over load protection Figure 37 – Open loop protection @ 85Vac Figure 38 – Open loop protection @ 265Vac 11.12 Channel Channel Channel Channel VCC under voltage/Short optocoupler protection 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Channel Channel Channel Channel 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) VCC under voltage/short optocoupler protection (short the transistor of optocoupler during system operating @ full load) VCC under voltage/short optocoupler protection (short the transistor of optocoupler during system operating @ full load) Figure 39 – Vcc under voltage/short optocoupler protection @ 85Vac Figure 40 – Vcc under voltage/short optocoupler protection @ 265Vac Application Note AN-EVAL-3RBR4765JZ 27 V1.1, 2013-07-15 12V 12W SMPS evaluation board with ICE3RBR4765JZ ANPS0078 References 11.13 Auto restart enable Enter autorestart Channel Channel Channel Channel Exit autorestart 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) Enter autorestart Channel Channel Channel Channel Exit autorestart 1; C1 : Current sense voltage (VCS) 2; C2 : Supply voltage (VCC) 3; C3 : Feedback voltage (VFB) 4; C4 : BA voltage (VBA) External autorestart enable (short BA pin to Gnd by 10Ω resistor & open) External autorestart enable (short BA pin to Gnd by 10Ω resistor & open) Figure 41 – External protection enable @ 85Vac Figure 42– External protection enable @ 265Vac 12 References [1] Infineon Technologies, Datasheet “CoolSET™-F3R ICE3RBR4765JZ Off-Line SMPS Current Mode Controller with Integrated 650V CoolMOS™ and Startup cell ( frequency jitter Mode ) in Dip-7” [2] Kyaw Zin Min, Kok Siu Kam Eric, Infineon Technologies, Application Note “CoolSET™-F3R (DIP-8, DIP-7 & DSO-16/12) new Jitter version Design Guide” [3] Harald Zoellinger, Rainer Kling, Infineon Technologies, Application Note “AN-SMPS-ICE2xXXX-1, CoolSET™. ICE2xXXXX for Off-Line Switching Mode Power supply (SMPS )” Application Note AN-EVAL-3RBR4765JZ 28 V1.1, 2013-07-15 w w w . i nf i n eo n. com Published by Infineon Technologies AG