AN - REF- 15W_C E1K0 AD APTER 1 5 W 5V Adapte r Re fe re nce Board wi th IC E2QS03G, IPS65R1 K0 C E, BSC 0 6 7N 0 6 L S3 G & BAS21 - 0 3 W Application Note About this document Scope and purpose This document is a 15W 5.0V high efficiency USB adapter reference design using Infineon Quasi-Resonant PWM IC ICE2QS03G with CoolMOS™ IPS65R1K0CE (IPAK) and secondary side synchronous rectification IC with OptiMOS™ BSC067N06LS3 G (ThinPAK 5x6) in a small form factor, high efficiency and various mode of protections for a high reliable system. Intended audience This document is intended for users who wish to design high efficiency, very small form factor universal 15W 5V AC-DC adapter with Infineon CoolMOS™ CE series, OptiMOS™, Quasi-Resonant PWM IC ICE2QS03G and synchronous rectification. 1 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Abstract Table of Contents About this document ................................................................................................................... 1 Table of Contents ........................................................................................................................ 2 1 Abstract ..................................................................................................................... 4 2 Reference board ......................................................................................................... 4 3 Specifications ............................................................................................................. 5 4 4.1 4.2 4.3 4.4 4.5 Circuit description....................................................................................................... 6 Mains input rectification and filtering ..................................................................................................... 6 PWM control and switching MOSFET ...................................................................................................... 6 Snubber network....................................................................................................................................... 6 Output stage .............................................................................................................................................. 6 Feedback loop ........................................................................................................................................... 6 5 5.1 5.2 5.3 5.4 5.5 Circuit operation ......................................................................................................... 7 Startup operation...................................................................................................................................... 7 Normal mode operation ........................................................................................................................... 7 Primary side peak current control........................................................................................................... 7 Digital frequency reduction ..................................................................................................................... 7 Burst mode operation............................................................................................................................... 7 6 6.1 6.2 6.3 6.4 6.5 6.6 Protection features ..................................................................................................... 8 VCC over voltage and under voltage protection ...................................................................................... 8 Over load/Open loop protection ............................................................................................................. 8 Auto restart for over temperature protection ........................................................................................ 8 Adjustable output overvoltage protection ............................................................................................. 8 Short winding protection ......................................................................................................................... 8 Foldback point protection ....................................................................................................................... 9 7 Circuit diagram ......................................................................................................... 10 8 8.1 8.2 PCB layout ............................................................................................................... 11 Top side ....................................................................................................................................................11 Bottom side..............................................................................................................................................11 9 Bill of material (BOM) ................................................................................................ 12 10 Transformer construction .......................................................................................... 13 11 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 Test results .............................................................................................................. 14 Efficiency, regulation and output ripple ...............................................................................................14 Standby power ........................................................................................................................................15 Line regulation.........................................................................................................................................16 Load regulation .......................................................................................................................................16 Maximum power......................................................................................................................................17 ESD immunity (EN61000-4-2) .................................................................................................................17 Surge immunity (EN61000-4-5)..............................................................................................................17 Conducted emissions (EN55022 class B) ..............................................................................................18 Thermal measurement ...........................................................................................................................20 Application Note 2 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Abstract 12 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 12.10 12.11 Waveforms and scope plots ........................................................................................ 20 Start up at low/high AC line input voltage with maximum load ........................................................20 Soft start ...................................................................................................................................................21 Drain voltage and current at maximum load .......................................................................................21 Zero crossing point during normal operation ......................................................................................22 Load transient response (Dynamic load from 10% to 100%) .............................................................22 Output ripple voltage at maximum load ..............................................................................................23 Output ripple voltage during burst mode at 1 W load ........................................................................23 Active Burst mode operation .................................................................................................................24 Over load protection (Auto restart mode) ............................................................................................24 Output overvoltage protection (Latched off mode) ............................................................................25 VCC under voltage/Short optocoupler protection (Auto restart mode) .............................................25 13 References ............................................................................................................... 26 Revision History........................................................................................................................ 26 Application Note 3 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Abstract 1 Abstract This application note is an engineering report of a very small form factor reference design for universal input 15W 5V adapter. The adapter is using ICE2QS03G, a second generation current mode control QuasiResonant flyback topology controller, IPS65R1K0CE, a CE series of high voltage power CoolMOS™ and BSC067N06LS3 G, a third series of medium voltage power OptiMOS™, optimized for Synchronous Rectification. The distinguishing features of this reference design are very small form factor, Best-in-Class low standby power, very high efficiency, good EMI performance and various modes of protection for high reliable system. 2 Reference 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. 45mm Figure 1 16mm 31mm REF-15W_CE1K0 ADAPTER [Dimensions L x W x H: 45mm x 31mm x 16mm] IPS65R1K0CE BSC067N06LS3 G ICE2QS03G BAS21-03W BAS21-03W (Top view) Figure 2 (Bottom view) REF-15W_CE1K0 ADAPTER [Top & Bottom View] Application Note 4 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Specifications 3 Table 1 Specifications Specifications of REF-15W_CE1K0 ADAPTER Input voltage 85Vac~265Vac Input frequency 50~60Hz Output voltage 5V Output current 3A Output power 15W Minimum switching frequency at full load and minimum input voltage 45kHz Maximum input power for universal mains < ±6% of input power No-load power consumption < 40mW (EU CoC Version 5, Tier 2 and EPS of DOE USA) Active mode four point average efficiency (25%,50%,75% & 100%load) (EU CoC Version 5, Tier 2 and EPS of DOE USA) >88% at 115Vac & >87% at 230Vac Active mode at 10% load efficiency >86% at 115Vac & >85% at 230Vac (EU CoC Version 5, Tier 2) Steady state output ripple +/-1% of nominal output voltage (Vripple_p_p<100mV) Dynamic load response undershoot & overshoot +/-3% of nominal output voltage (Vripple_p_p <300mV) Conducted emissions (EN55022 class B) Pass with 8 dB margin ESD immunity (EN61000-4-2) level 3 (±6kV) contact discharge Surge immunity (EN61000-4-5) Installation class 3 (2kV: common mode) Form factor case size (L x W x H) (45 x 31 x 16) mm3 Application Note 5 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Circuit description 4 Circuit description 4.1 Mains input rectification and filtering The AC line input side comprises the input fuse F1 as over-current protection. A rectified DC voltage (120V ~ 374V) is obtained through a bridge rectifier BR1 and a pi filter C13, FB21 and C22. The pi filer also attenuates the differential mode conducted EMI. 4.2 PWM control and switching MOSFET The PWM pulse is generated by the Quasi Resonant PWM current-mode Controller ICE2QS03G and this PWM pulse drives the high voltage power CoolMOS™, IPS65R1K0CE (CE) which designed aCCording to the revolutionary Superjunction (SJ) principle. The CoolMOS™ CE provides all benefits of a fast switching SJ MOSFET while not sacrificing ease of use. It achieves extremely low conduction and switching losses and can make switching applications more efficient, more compact, lighter and cooler. The PWM switch-on is determined by the zero-crossing input signal and the value of the up/down counter. The PWM switch-off is determined by the feedback signal VFB and the current sensing signal VCS. ICE2QS03G also performs all necessary protection functions in flyback converters. Details about the information mentioned above are illustrated in the product datasheet. 4.3 Snubber network A snubber network R11, R11A, C15 and D11 dissipate the energy of the leakage inductance and suppress ringing on the SMPS transformer. Due to the resonant capacitor (MOSFET’s drain source capacitance), the overshoot is relatively smaller than fixed frequency flyback converter. Thus the snubber resistor can be used with a larger one which will reduce the snubber loss. 4.4 Output stage On the secondary side, 5V output, the PWM pulse is generated by synchronous rectification controller UCC24610. The synchronous rectification pulse drives the medium voltage power OptiMOS™, BSC067N06LS3 -G which is optimized for synchronous rectification such as the lowest RDS(on), the perfect switching behavior of fast switching, the smallest footprint and highest power density. The capacitors C22 provides energy buffering following with the LC filter FB21 and C24 to reduce the output ripple and prevent interference between SMPS switching frequency and line frequency considerably. Storage capacitor C22 is designed to have an internal resistance (ESR) as small as possible. This is to minimize the output voltage ripple caused by the triangular current. 4.5 Feedback loop For feedback, the output is sensed by the voltage divider of R26 and R25 and compared to TL431 internal reference voltage. C25, C26 and R24 comprise the compensation network. The output voltage of TL431 is converted to the current signal via optocoupler IC12 and two resistors R22 and R23 for regulation control. Application Note 6 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Circuit operation 5 Circuit operation 5.1 Startup operation Since there is a built-in startup cell in the ICE2QS03G, there is no need for external start up resistor, which can improve standby performance significantly. When VCC reaches the turn on voltage threshold 18V, the IC begins with a soft start. The soft-start implemented in ICE2QS03G is a digital time-based function. The preset soft-start time is 12ms with 4 steps. If not limited by other functions, the peak voltage on CS pin will increase step by step from 0.32V to 1V finally. After IC turns on, the VCC voltage is supplied by auxiliary windings of the transformer. 5.2 Normal mode operation The secondary output voltage is built up after startup. The secondary regulation control is adopted with TL431 and optocoupler. The compensation network C25, C26 and R24 constitutes the external circuitry of the error amplifier of TL431. This circuitry allows the feedback to be precisely controlled with respect to dynamically varying load conditions, therefore providing stable control. 5.3 Primary side peak current control The MOSFET drain source current is sensed via external resistor R14 and R14A. Since ICE2QS03G is a current mode controller, it would have a cycle-by-cycle primary current and feedback voltage control which can make sure the maximum power of the converter is controlled in every switching cycle. 5.4 Digital frequency reduction During normal operation, the switching frequency for ICE2QS03G is digitally reduced with decreasing load. At light load, the CoolMOS™ IPS65R1K0CE will be turned on not at the first minimum drain-source voltage time, but on the nth. The counter is in range of 1 to 7, which depends on feedback voltage in a time-base. The feedback voltage decreases when the output power requirement decreases, and vice versa. Therefore, the counter is set by monitoring voltage VFB. The counter will be increased with low VFB and decreased with high VFB. The thresholds are preset inside the IC. 5.5 Burst mode operation At light load condition, the SMPS enters into Active Burst Mode. At this stage, the controller is always active but the VCC must be kept above the switch off threshold. During active burst mode, the efficiency increase significantly and at the same time it supports low ripple on Vout and fast response on load jump. For determination of entering Active Burst Mode operation, three conditions apply: 1. The feedback voltage is lower than the threshold of V FBEB(1.25V). ACCordingly, the peak current sense voltage across the shunt resistor is 0.1667; 2. The up/down counter is 7; 3. And a certain blanking time (tBEB=24ms). Once all of these conditions are fulfilled, the Active Burst Mode flip-flop is set and the controller enters Active Burst Mode operation. This multi-condition determination for entering Active Burst Mode operation prevents mis-triggering of entering Active Burst Mode operation, so that the controller enters Active Burst Mode operation only when the output power is really low during the preset blanking time. Application Note 7 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Protection features During active burst mode, the maximum current sense voltage is reduced from 1V to 0.34V so as to reduce the conduction loss and the audible noise. At the burst mode, the FB voltage is changing like a sawtooth between 3.0 and 3.6V. The feedback voltage immediately increases if there is a high load jump. This is observed by one comparator. As the current limit is 34% during Active Burst Mode a certain load is needed so that feedback voltage can exceed VLB (4.5V). After leaving active burst mode, maximum current can now be provided to stabilize VO. In addition, the up/down counter will be set to 1 immediately after leaving Active Burst Mode. This is helpful to decrease the output voltage undershoot. 6 Protection features 6.1 VCC over voltage and under voltage protection During normal operation, the VCC voltage is continuously monitored. When the VCC voltage increases up to VCC,OVP or VCC voltage falls below the under voltage lock out level V CC,off, the IC will enter into autorestart mode. 6.2 Over load/Open loop protection In case of open control loop, feedback voltage is pulled up with internally block. After a fixed blanking time, the IC enters into auto restart mode. In case of secondary short-circuit or overload, regulation voltage VFB will also be pulled up, same protection is applied and IC will auto restart. 6.3 Auto restart for over temperature protection The IC has a built-in over temperature protection function. When the controller’s temperature reaches 140°C, the IC will shut down switch and enters into auto restart. This can protect power MOSFET from overheated. 6.4 Adjustable output overvoltage protection During off-time of the power switch, the voltage at the zero-crossing pin ZC is monitored for output overvoltage detection. If the voltage is higher than the preset threshold 3.7V for a preset period 100μs, the IC is latched off. 6.5 Short winding protection The source current of the MOSFET is sensed via external resistor R14 and R14A. If the voltage at the current sensing pin is higher than the preset threshold V CSSW of 1.68V during the on-time of the power switch, the IC is latched off. This constitutes a short winding protection. To avoid an aCCidental latch off, a spike blanking time of 190ns is integrated in the output of internal comparator. Application Note 8 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Protection features 6.6 Foldback point protection For a quasi-resonant flyback converter, the maximum possible output power is increased when a constant current limit value is used for all the mains input voltage range. This is usually not desired as this will increase additional cost on transformer and output diode in case of output over power conditions. The internal foldback protection is implemented to adjust the VCS voltage limit a CCording to the bus voltage. Here, the input line voltage is sensed using the current flowing out of ZC pin, during the MOSFET on-time. As the result, the maximum current limit will be lower at high input voltage and the maximum output power can be well limited versus the input voltage. Application Note 9 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Circuit diagram 7 Circuit diagram Figure 3 Schematic of REF-15W_CE1K0 ADAPTER Application Note 10 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W PCB layout 8 PCB layout 8.1 Top side Figure 4 Top side copper and component legend 8.2 Bottom side Figure 5 Bottom side copper and component legend Application Note 11 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Bill of material (BOM) 9 Bill of material (BOM) Table 2 No. 1 2 3 4 5 6 7 8 9 10 11 Bill of materials Designator BR1 C12 C13, C13A C15 C16 C17 C18, C26 C19 C21 C22 C24 Description (800V/1A) 2.2nF/250V 15uF/400V 1nF/1000V 22uF/35V 100nF/50V 1nF/50V 47pF/50V 560pF/100V 820uF/6.3V 450uF/6.3V Footprint SOP-4 MKT2/13/10_0M8 RB10H(10x16) 0805 1206 0402 0402 0402 0603 RB6.3 RB5 Part Number D1UBA80 DE1E3KL222MC4BNA1S 400AX15M10X16 C0805X102KDRACTU C3216X5R1V226M GRM155R71H104KE14D GRM155R71H102KA01D GRM1555C1H470JA01D GRM1885C2A561JA01D MP6RL820MC8 MP6RL450MB8 Manufacturer SHINDENGEN MURATA RUBYCON 12 C25 220nF/25V 0402 GRM155C81E224KE01D MURATA 1 13 C27 1uF/25V 0402 GRM155R61E105KA12D MURATA 1 14 D11 600V/1A Sub SMA ES1JL 15 D12,D13 200V/0.25A SOD323 BAS21-03W 16 D21 45V/5A VSSAF5L45 1 17 18 19 20 F1 FB21 IC11 IC12 250V/1A FAIR RITE ICE2QS03G TCMT1103 0263001.HAT1L 2743002112 ICE2QS03G TCMT1103 1 1 1 1 21 22 23 IC21 IC22 L TL431 UCC24610 connector DO-221AC (slimSMA) AXIAL0.4_V 3mm AXIAL0.4_V 3mm SO-8 optocoupler half pitch mini flat package SOT-23 SO-8 Connector 24 L11 1mH/0.5A CH8 768772102 25 26 27 28 N Q11 Q21 R11,R11A Connector N(2.5) 650V/1R 60V/6.7mR 200k/400V/0.5W Connector(2.5) TO251(IPAK) INF-PG-TDSON81 0805 5001BLACK IPS65R1K0CE BSC067N06LS3 G ERJP06F2003V 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 R12, R15 R12A, R13, R14B R12B R12C R14, R14A R18 R21 R22 R23 R24 R25, R26 R27 R28 R29 R30 R31, R33 R32 10R 0R 43k/1% 10k/1% 2R/0.33W/1% 10k 47R/0.5W 130R 1.2k 12k 20k 2R 68k 220k 43.2k 51.1k 75k 0402 0402 0402 0402 1206 0402 0805 0402 0402 0402 0402 0402 0402 0402 0402 0402 0402 46 TR1 TR_RM6_THT6Pin 47 USB Port 718uH(66:5:16) RM6(TP4A) USBPORT 48 ZD11 Application Note 22V Zener USB2 Short(Horizontal) SOD323 MURATA MURATA MURATA MURATA 1 INFINEON INFINEON TL431BFDT UCC24610 5000RED ERJ8BQF2R0V ERJP6WF47R0V Quantity 1 1 2 1 1 1 2 1 1 1 1 2 1 1 1 WURTH ELECTRONICS INFINEON INFINEON 1 1 1 1 2 2 3 1 1 2 1 1 1 1 1 2 1 1 1 1 1 1 1 1 JL-CAF-001 UDZS22B 12 1 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Transformer construction 10 Transformer construction Core and material: RM6 TP4A Bobbin: RM6 with 3 pin Primary Inductance, Lp=718 μH( ±10%), measured between pin 2 and pin 6 Figure 6 Start 6 Stop 1 No. of turns 33 Wire size 1XAWG#34 S1(Flying wire) S2(5) Flying wire S1(Flying wire) floating F2(3) Flying wire floating 30 5 30 1XAWG#34 1XLitz TIW(7 X AWG#29) 1XAWG#34 1 S1(Flying wire) 2 F1 (Flying wire) 33 16 1XAWG#34 1XTIW(0.25mm) Layer 1 /2 Primary Shield Secondary Shield 1 /2 Primary Auxiliary Transformer structure Application Note 13 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Test results 11 Test results 11.1 Efficiency, regulation and output ripple Table 3 Vin (Vac) 85 115 230 265 Figure 7 Efficiency, regulation & output ripple Pin (W) 0.0322 1.7400 4.2700 8.5100 12.7900 17.3500 0.0326 1.7500 4.2700 8.4400 12.6400 16.9300 0.0339 1.7700 4.4200 8.4900 12.6500 17.0700 0.0347 1.7800 4.4900 8.5400 12.7200 17.2400 Vout (Vdc) 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 5.02 Iout (A) 0.00 0.30 0.75 1.50 2.25 3.00 0.00 0.30 0.75 1.50 2.25 3.00 0.00 0.30 0.75 1.50 2.25 3.00 0.00 0.30 0.75 1.50 2.25 3.00 Vout_ripple_pk_pk (mV) 59.70 57.40 22.60 32.10 35.20 49.70 64.90 59.90 20.10 29.80 35.00 40.30 70.20 81.30 22.40 33.50 35.30 37.00 76.00 77.90 22.90 33.70 36.60 38.80 Pout (W) η (%) 1.51 3.77 7.53 11.30 15.06 86.55 88.17 88.48 88.31 86.80 1.51 3.77 7.53 11.30 15.06 86.06 88.17 89.22 89.36 88.95 1.51 3.77 7.53 11.30 15.06 85.08 85.18 88.69 89.29 88.22 1.51 3.77 7.53 11.30 15.06 84.61 83.85 88.17 88.80 87.35 Average η (%) OLP Pin (W) OLP Iout (A) 20.00 3.42 19.85 3.48 20.44 3.61 21.45 3.76 87.94 88.93 87.85 87.04 Efficiency vs AC line input voltage Application Note 14 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Test results Figure 8 Efficiency vs output power @ 115Vac and 230V line 11.2 Standby power Figure 9 Standby power @ no load vs AC line input voltage (measured by Yokogawa WT210 power meter - integration mode) Application Note 15 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Test results 11.3 Line regulation Figure 10 Line regulation Vout @ full load vs AC line input voltage 11.4 Load regulation Figure 11 Load regulation Vout vs output power Application Note 16 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Test results 11.5 Maximum power Figure 12 Maximum input power (before over-load protection) vs AC line input voltage 11.6 ESD immunity (EN61000-4-2) Pass EN61000-4-2 level 3 (±6kV) contact discharge. 11.7 Surge immunity (EN61000-4-5) Pass EN61000-4-5 Installation class 3 (2kV: common mode). Application Note 17 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Test results 11.8 Conducted emissions (EN55022 class B) The conducted EMI was measured by Schaffner (SMR25503) and followed the test standard of EN55022 (CISPR 22) class B. The demo board was set up at maximum load (15W) with input voltage of 115Vac and 230Vac. Figure 13 Conducted emissions(Line) at 115Vac and maximum Load Figure 14 Conducted emissions(Neutral) at 115Vac and maximum Load Application Note 18 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Test results 80 EN_V_QP EN_V_AV 70 QP AV 60 50 dBµV 40 30 20 10 0 -10 0.1 1 10 100 -20 f / MHz Figure 15 Conducted emissions(line) at 230Vac and maximum Load Figure 16 Conducted emissions(Neutral) at 230Vac and maximum Load Pass conducted EMI EN55022 (CISPR 22) class B with > 8dB margin for QP. Application Note 19 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Waveforms and scope plots 11.9 Thermal measurement The reference adapter’s open frame thermal test was done by thermal infrared camera (TVS-500EX) at the ambient temperature 25⁰C. The thermal measures were taken after two hours running with full load and the highest temperature of Q11 (CoolMOS™ CE) is 70.1⁰C for low line and 85.1⁰C for high line. Q11 (CoolMOS™ CE) Q11 (CoolMOS™ CE) 70.1⁰C 85.1⁰C (85Vac ,full load ) (265Vac & full load) Figure 17 Infrared thermal image of REF-15W_CE1K0 ADAPTER 12 Waveforms and scope plots All waveforms and scope plots were recorded with a LeCroy 6050 oscilloscope 12.1 Start up at low/high AC line input voltage with maximum load 210ms 210ms Channel 1; C1 : Drain voltage (VDrain) Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : Zero crossing voltage (VZC) Channel 4; C4 : Zero crossing voltage (VZC) Startup time = 210ms Startup time = 210ms Figure 18 Figure 19 Startup @ 85Vac & max. load Application Note 20 Startup @ 265Vac & max. load Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Waveforms and scope plots 12.2 Soft start 13ms Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : Zero crossing voltage (VZC) Soft Star time = 13ms Figure 20 12.3 Soft Start @ 85Vac & max. load Drain voltage and current at maximum load Channel 1; C1 : Drain-source voltage (VDS) Channel 2; C2 : Current sense voltage (VCS) VDrain_peak = 276V Figure 21 Operation @ 85Vac and max. load Application Note Channel 1; C1 : Drain-source voltage (VDS) Channel 2; C2 : Current sense voltage (VCS) VDrain_peak = 546V Figure 22 Operation @ 265Vac and max. load 21 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Waveforms and scope plots 12.4 Zero crossing point during normal operation Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Current sense voltage (VCS) Figure 23 Operation @ 85Vac and 2nd zero crossing 12.5 Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Current sense voltage (VCS) Figure 24 Operation @ 85Vac and 7th zero crossing Load transient response (Dynamic load from 10% to 100%) Channel 1; C1 : Output ripple voltage (Vout) Channel 1; C1 : Output ripple voltage (Vout) Channel 2; C2 : Output current (Iout) Channel 2; C2 : Output current (Iout) Vripple_pk_pk=241mV (Load change from10% to 100%,100Hz,0.4A/μS slew rate) Vripple_pk_pk=245mV (Load change from10% to 100%,100Hz,0.4A/μS slew rate) Probe terminal end with decoupling capacitor of 0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter Probe terminal end with decoupling capacitor of 0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter Figure 25 Figure 26 – Load transient response @ 85Vac Application Note 22 Load transient response @ 265Vac Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Waveforms and scope plots 12.6 Output ripple voltage at maximum load Channel 1; C1 : Output ripple voltage (Vout) Channel 1; C1 : Output ripple voltage (Vout) Channel 2; C2 : Output current (Iout) Channel 2; C2 : Output current (Iout) Vripple_pk_pk=49.7mV Vripple_pk_pk = 38.8mV Probe terminal end with decoupling capacitor of 0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter Probe terminal end with decoupling capacitor of 0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter Figure 27 Figure 28 12.7 AC output ripple @ 85Vac and max. load AC output ripple @ 265Vac and max. load Output ripple voltage during burst mode at 1 W load Channel 1; C1 : Output ripple voltage (Vout) Channel 1; C1 : Output ripple voltage (Vout) Channel 2; C2 : Output current (Iout) Channel 2; C2 : Output current (Iout) Vripple_pk_pk=59.5mV Vripple_pk_pk = 73.8mV Probe terminal end with decoupling capacitor of 0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter Probe terminal end with decoupling capacitor of 0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter Figure 29 Figure 30 AC output ripple @ 85Vac and 1W load Application Note 23 AC output ripple @ 265Vac and 1W load Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Waveforms and scope plots 12.8 Active Burst mode operation 6th 7th Channel 1; C1 : Drain voltage (VDrain) Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : Zero crossing voltage (VZC) Condition: VFB<1.2V, NZC=7 and tblanking =29ms (load change form full load to 1W load) Figure 31 Entering active burst mode @ 85Vac Channel 4; C4 : Zero crossing voltage (VZC) Condition: VFB>4.5V (load change from 1W to full load) Figure 32 Leaving active burst mode @ 85Vac 12.9 Over load protection (Auto restart mode) built-in 30ms blanking Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : Zero crossing voltage (VZC) Condition: VFB>4.5V & last for 30ms blanking time (output load change from full load to short load) Figure 33 Over load protection with extended blanking time @ 85Vac Application Note 24 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W Waveforms and scope plots 12.10 Output overvoltage protection (Latched off mode) Channel 1; C1 : Output voltage (Vout) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : Zero crossing voltage (VZC) Condition: VO >5.5V (VZC>3.7V)(short R26 during while system operation at no load) Figure 34 12.11 Output overvoltage protection @ 85Vac VCC under voltage/Short optocoupler protection (Auto restart mode) Enter autorestart Exit autorestart Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : Zero crossing voltage (VZC) VCC under voltage/short optocoupler protection (short the transistor of optocoupler during system operating @ full load & release) Figure 35 VCC under voltage/short optocoupler protection @ 85Vac Application Note 25 Revision 1.1, 2014-11-27 15W 5V Adapter Reference Board with ICE2QS03G, IPS65R1K0CE, BSC067N06LS3 G & BAS21-03W References 13 References [1] ICE2QS03G data sheet, Infineon Technologies AG [2] IPS65R1K0CE data sheet, 650V CoolMOS™ CE Power Transistor, Infineon Technologies AG [3] BSC067N06LS3 G data sheet, 60V OptiMOS™ 3 Power Transistor, Infineon Technologies AG [4] BAS21-03W data sheet, Infineon Technologies AG [5] Converter Design Using the Quasi-Resonant PWM Controller ICE2QS01, Infineon Technologies AG, 2006. [ANPS0003] [6] Design tips for flyback converters using the Quasi-Resonant PWM controller ICE2QS01, Infineon Technologies, 2006. [ANPS0005] [7] Determine the switching frequency of Quasi-Resonant flyback converters designed with ICE2QS01, Infineon Technologies, 2006. [ANPS0004] [8] ICE2QS03G design guide. [ANPS0027] [9] 36W Evaluation Board with Quasi-Resonant PWM Controller ICE2QS03G, 2011. [AN-PS0040] Revision History Major changes since the last revision Page or Reference Description of change 1,2,4,5,6,8,11,12,14,15,16,17,20,22, Make consistent symbol 23 & 25 Application Note 26 Revision 1.1, 2014-11-27 Trademarks of Infineon Technologies AG AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, 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 Ma xim 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. TEAKL ITE™ 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 www.infineon.com Edition 2014-11-27 Published by Infineon Technologies AG 81726 Munich, Germany © 2014 Infineon Technologies AG. All Rights Reserved. Do you have a question about any aspect of this document? Email: [email protected] Document reference AN_201411_PL21_003 Legal Disclaimer THE INFORMATION GIVEN IN THIS APPLICATION NOTE (INCLUDING BUT NOT LIMITED TO CONTENTS OF REFERENCED WEBSITES) 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. 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