Transcript
AN- EVAL- 3 RBR06 65 JZ
30W 12V SMPS e va l uat ion boar d wit h I CE3RB R0665J Z
Appl icat ion Not e AN - EVAL- 3RB R0665JZ V1. 0 , 2014- 07- 22
Po wer Manag em ent & Mult im ar k et
Edition 2014-07-22 Published by Infineon Technologies AG, 81726 Munich, Germany. © 2014 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.
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Trademarks of Infineon Technologies AG AURIX™, C6 6™, 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-3RBR0665JZ
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Revision History ANEVAL_201406_PL21_003 Major changes since previous revision Date
Version
Changed By
Change Description
22 Jul 2014
1.0
Kyaw Zin Min
Release of final version
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]
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Table of Contents Revision History .............................................................................................................................................. 4 Table of Contents ............................................................................................................................................ 5 1
Abstract ........................................................................................................................................ 7
2
Evaluation board .......................................................................................................................... 7
3
Evaluation board specification .................................................................................................... 8
4
List of feature (ICE3RBR0665JZ) ................................................................................................. 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 DZD 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 10.9
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 Thermal measurement ................................................................................................................. 22
11 11.1 11.2 11.3 11.4 11.5
Waveforms and scope plots ...................................................................................................... 23 Start up at low and high AC line input voltage and maximum load................................................. 23 Soft start at low AC line input voltage and maximum load ............................................................. 23 Frequency jittering........................................................................................................................ 24 Drain voltage and current @ maximum load ................................................................................. 24 Load transient response (Dynamic load from 10% to 100%) ......................................................... 25
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11.6 11.7 11.8 11.9 11.10 11.11 11.12
Output ripple voltage at maximum load......................................................................................... 25 Output ripple voltage during burst mode at 1 W load..................................................................... 26 Active burst mode operation ......................................................................................................... 26 Vcc overvoltage protection ........................................................................................................... 27 Over load protection (built-in + extended blanking time) ................................................................ 27 VCC under voltage/Short optocoupler protection ............................................................................ 28 Auto restart enable ....................................................................................................................... 28
12
References ................................................................................................................................. 29
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Abstract
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Abstract
This document is an engineering report of a universal input 12V 30W off-line flyback converter power supply utilizing F3R CoolSET™ ICE3RBR0665JZ. The application evaluation 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 ICE3RBR0665JZ 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.
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Evaluation board
Figure 1 – EVAL-3RBR0665JZ [Dimensions L x W x H: 105mm x 52mm x 27mm (4.13" x 2.04" x 1.06")] 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.
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Evaluation board specification
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Evaluation board specification
Input voltage Input frequency Output voltage Output current Output power Maximum input power(Peak Power) for full input range
85VAC~265VAC 50~60Hz 12V 2.5A 30W
Maximum output ripple voltage @ full load No-load power consumption
< 30mV < 50mW (comply with EU CoC Version 5, Tier 1)
Active mode four point average (25%,50%,75% & 100%load) Active mode at 10% load efficiency
< ±2% of average maximum input power
>86% (comply with EU CoC Version 5, Tier 1)
efficiency
>84% (comply with EU CoC Version 5, Tier 1) 105mm x 52mm x 27mm (4.13" x 2.04" x 1.06")
Form factor case size (L x W x H)
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List of feature (ICE3RBR0665JZ)
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
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Circuit description
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Circuit description
5.1
Introduction
The EVAL-3RBR0665JZ evaluation board is a low cost off line flyback switch mode power supply ( SMPS ) using the ICE3RBR0665JZ integrated power IC from the CoolSET™-F3R family. The circuit, shown in Figure 2, details a 12V, 30W 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,C14 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 ICE3RBR0665JZ, 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 ICE3RBR0665JZ, 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
DZD clamper circuit
While turns off the CoolMOS™, the clamper circuit DZD11 absorbs the current caused by transformer leakage inductance once the voltage exceeds DZD11 clamp 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 R14A which determine the tolerance of the current limit control. Since ICE3RBR0665JZ 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 evaluation board shows approximately +/-0.53% (refer to Figure 11).
5.8
Output stage
On the secondary side the power is coupled out by a schottky diode D21. The capacitor C22, C23 provide energy buffering following with the LC filter L21 and C24 to reduce the output voltage ripple considerably. Storage capacitor C22, C23 is selected to have an internal resistance as small as possible (ESR) to minimize the output voltage ripple.
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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, R25A and R26 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 ICE3RBR0665JZ 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 =100nF) 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 4.0V 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 R14A.
Tblanking Basic Extended 20ms
5.11
(4.0 0.9)*CBK 20ms 238461.5 * CBK 23.8ms 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 V OUT 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 ICE3RBR0665JZ 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. ICE3RBR0665JZ 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.
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Circuit description Protection function
Failure condition
Protection Mode
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
VFB>4V & last for 20ms & VBA>4V & last for 30µs Overload / Open loop
(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
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Circuit diagram
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Circuit diagram
Figure 2 – 30W 12V ICE3RBR0665JZ power supply schematic
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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 R14A. EMI return ground includes Y capacitor, C12.
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PCB layout
7.1
Top side
Figure 3 – Top side component legend
7.2
Bottom side
Figure 4 – Bottom side copper and component legend
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Component list
Component list
8 No. Designator
Component Description
Footprint
Part Number
Manufacturer
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Connector 600V/2A 220nF/305V 47pF/1kV 2.2nF/250V,Y1 82uF/450V 100nF/305V 22uF/50V 100nF/50V 1nF/50V 1200uF/16V 200V/0.2A 100V/30A 145V/200W 300V/1.6A HS TO220 ICE3RBR0665JZ SFH617 A3(Optocoupler) TL431 Jumper 39mH/0.7A
691102710002 D2SB60A B32922C3224 DEA1X3A470JC1B DE1E3KX222MA4BN01F 450BXW82MEFC16X35 B329221C3104 50PX22MEFC5X11
WURTH ELECTRONICS SHINDENGEN EPCOS MURATA MURATA RUBYCON EPCOS RUBYCON MURATA MURATA RUBYCON
10R 0R 1R1/0.75W 1R/0.75W 820R 1.2k 330k 75k 1k 20k
Con2 Bridge(2S) MKT8/18/15 MKT2/7/5 MKT2/13/10 RB16X36Horizontal MKT5/18/15 RB5.5 0603 0603 RB10 DIODE0.3 ITO-220AB DIODE0.4 MKT4.3/8.4/5 HS TO220 DIP7 DIP4 TO92-TL431AXIAL0.3 EMI_C_U21 Axial 0.4_V_FB 0603 0603 1206R 1206R 0603 0603 0603 AXIAL0.3 0603 0603
368µH(48:8:12) 250V/0.25W
EF25/10H MKT3.5/7.5/5
750342158 B72207S0251K101
+12V Com,L N BR1 C11 C110 C12 C13 C14 C16 C17,C19,C25 C18,C26 C22,C23 & C24 D12 D21 DZD11 F1 HS1 IC11 IC12 IC21 J1,J2,J3,J4 L11 L21 R12 R12A R14 R14A R22 R23 R24 R25 R25A R26
33 TR1 34 VAR
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GRM188R71H104KA93D GRM188R71H102KA01D 16ZLK1200M10X20 1N485B STPS30M100SFP ST02D-140 36911600000 574502B03300G ICE3RBR0665JZ SFH617 A3
B82732R2701B030 2743002111
Quantity
SHINDENGEN
INFINEON
EPCOS
ERJB2BF1R1V ERJB2BF1R0V
WURTH ELECTRONICS MIDCOM EPCOS
2 1 1 1 1 1 1 1 3 2 3 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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Transformer construction
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Transformer construction
Core and material: EE25/13/7(EF25), TP4A (TDG) Bobbin: 070-2607(10-Pin, THT, Horizontal version) Primary Inductance, Lp=368μH (±10%), measured between pin 4 and pin 5 Manufacturer and part number: Wurth Electronics Midcom (750342158, Rev01)
Transformer specifications:
Figure 5 – Transformer structure Application Note AN-EVAL-3RBR0665JZ
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Test results
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Test results
10.1
Efficiency VOut_ripple_p
Vin(Vac)
85
115
230
265
Pin(W)
Vo(Vdc)
Io(A)
k_pk
0.0035 3.4400 8.6500 17.4400 25.4900 35.8500 0.0363 3.4800 8.6300 17.2400 25.9700 34.9200 0.0439 3.5400 8.8500 17.3200 25.8700 34.4500 0.0480 3.5800 9.0300 17.4000 25.9400 34.4800
12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02 12.02
0.00 0.25 0.625 1.250 1.875 2.500 0.00 0.25 0.625 1.250 1.875 2.500 0.00 0.25 0.625 1.250 1.875 2.500 0.00 0.25 0.625 1.250 1.875 2.500
(mV) 35.20 47.00 9.50 13.00 18.40 26.60 35.70 48.00 10.00 12.70 18.30 23.80 38.80 51.50 9.80 12.90 18.30 24.20 39.90 53.40 9.70 13.10 18.60 26.50
Po(W)
η (%)
3.01 7.51 15.03 22.54 30.05
87.35 86.85 86.15 88.42 83.82
3.01 7.51 15.03 22.54 30.05
86.35 87.05 87.15 86.78 86.05
3.01 7.51 15.03 22.54 30.05
84.89 84.89 86.75 87.12 87.23
3.01 7.51 15.03 22.54 30.05
83.94 83.19 86.35 86.88 87.15
Average η (%)
OLP Pin (W)
OLP Iout (A)
47.10
3.27
46.85
3.33
46.80
3.41
47.30
3.45
86.31
86.76
86.50
85.90
Figure 6 – Efficiency Vs. AC line input voltage
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Test results
Figure 7 – Efficiency Vs. output power @ 115Vac and 230Vac
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 )
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Test results
10.3
Line regulation
Figure 9 – Line regulation Vout @ full load vs. AC line input voltage
10.4
Load regulation
Figure 10 – Load regulation Vout vs. output power
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Test results
10.5
Maximum input power
Figure 11 – Maximum input power ( before overload protection ) vs. AC line input voltage
10.6
Electrostatic discharge/ESD test (EN6100-4-2)
Pass [level 4, 8kV (contact discharge)]
10.7
Surge/Lightning strike test (EN61000-4-5)
Pass [Installation class 3, 2kV (line to earth) & 1kV (line to line)]
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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 evaluation board was set up at maximum load (30W) with input voltage of 115Vac and 230Vac.
Figure 12 – Maximum load (30W) with 115 Vac (Line)
Figure 13 – Maximum load (30W) with 115 Vac (Neutral) Application Note AN-EVAL-3RBR0665JZ
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Test results
Figure 14 – Maximum load (30W) with 230 Vac (Line)
Figure 15 – Maximum load (30W) with 230 Vac (Neutral) Pass conducted emissions EN55022 (CISPR 22) class B with > 10dB margin. Application Note AN-EVAL-3RBR0665JZ
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Test results
10.9
Thermal measurement
The thermal test of open frame evaluation board was done using an infrared thermography camera (TVS500EX) at ambient temperature 25⁰C. The measurements were taken after two hours running at full load (30W). No. Major component
85Vac (°C) 115Vac (°C) 230Vac (°C) 265Vac (°C)
1
IC11 (ICE3RBR0665JZ)
57.6
52.6
65.6
66.7
2
DZD11
56.9
54.5
58.7
58.4
3
BR1
58.8
49.1
39.4
37.9
4
TR1
54.5
55.0
59.0
59.4
5
D21
65.2
65.2
65.1
65.1
6
L11
94.2
68.8
41.2
39.1
85Vac, 30W load, 25⁰C ambient
115Vac, 30W load, 25⁰C ambient
230Vac, 30W load, 25⁰C ambient
265Vac, 30W load, 25⁰C ambient
Figure 16 – Infrared Thermography of open frame evaluation board
Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
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
487ms
487ms
Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Start up time = 487ms Figure 17 – Startup @ 85Vac & max. load
11.2
Channel 1; C1 : Drain voltage (VDrain) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Start up time = 487ms Figure 18 – Startup @ 265Vac & max. load
Soft start at low AC line input voltage and maximum load
19ms
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) Soft start time = 19ms Figure 19 – Startup @ 85Vac & max. load
Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.3
Frequency jittering
67kHz 67kHz
3.9ms
3.9ms 62kHz
62kHz
Channel 1; C1 : Drain voltage (VD) Channel F2 : Frequency track of C1 Frequency jittering from 62 kHz ~ 67kHz, Jitter period is 3.9ms Figure 20 – Frequency jittering @ 85Vac and max. load
11.4
Channel 1; C1 : Drain voltage (VD) Channel F2 : Frequency track of C1 Frequency jittering from 62 kHz ~ 67kHz, Jitter period is 3.9ms Figure 21 – Frequency jittering @ 265Vac and max. load
Drain voltage & Vcs @ maximum load
Channel 1; C1 : Drain voltage ( VD ) Channel 2; C2 : Current sense voltage (VCS) VDS_peak=302V Figure 22 – Operation @ Vin = 85Vac and max. load
Application Note AN-EVAL-3RBR0665JZ
Channel 1; C1 : Drain voltage ( VD ) Channel 2; C2 : Current sense voltage (VCS) VDS_peak=572V Figure 23 – Operation @ Vin = 265Vac and max. load
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
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=116mV (Load change from10% to 100%,100Hz,0.4A/μS slew rate)
Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk=118mV (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 24 – Load transient response @ 85Vac
Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 25 – Load transient response @ 265Vac
11.6
Output ripple voltage at maximum load
Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk=26.6mV
Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk=26.5mV
Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 26 – AC output ripple @ Vin=85Vac and max. load
Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 27 – AC output ripple @ Vin=265Vac and max. load
Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.7
Output ripple voltage during burst mode at 1 W load
Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk=41mV
Channel 1; C1 : Output ripple Voltage ( Vo ) Channel 2; C2 : Output Current ( Io ) Vripple_pk_pk = 49mV
Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 28 – AC output ripple @ 85Vac and 1W load
Probe terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 29 – AC output ripple @ 265Vac and 1W load
11.8
Active burst mode operation
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) Condition: VFB<1.35V & last for 20ms
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) Condition: VFB>4V
(load change form full load to 1W load) Figure 30 – Entering active burst mode @ 85Vac
(load change form 1W load to full load) Figure 31 – Leaving active burst mode @ 85Vac
Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.9
Vcc overvoltage protection
VCC OVP2
VCC OVP1
Channel 1; C1 : Drain voltage ( VD ) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Condition: VCC>25.5 & last for 150µs VCC>20.5 & VFB>4V & during soft start & last for 30µs (J4 disconnected during system operating at no load) Figure 32 – Vcc overvoltage protection @ 85Vac
11.10
Over load protection (built-in + extended blanking time)
Extended 20ms built in
Channel 1; C1 : Drain voltage ( VD ) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Condition: VFB>4V & last for 20ms & VBA>4V & last for 30µs (output load change from 2.5A to 3.5A) Figure 33 – Over load protection with built-in+extended blanking time @ 85Vac Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.11
VCC under voltage/Short optocoupler protection
VCC under voltage underunderOVP2
Channel 1; C1 : Drain voltage ( VD ) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Condition: VCC<10.5V (short the transistor of optocoupler during system operating @ full load and release) Figure 34 – Vcc under voltage/short optocoupler protection @ 85Vac
11.12
Auto restart enable
Enter auto restart
Exit auto restart
Channel 1; C1 : Drain voltage ( VD ) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA voltage (VBA) Condition: VBAC<0.33V (short BA pin to Gnd by 10Ω resistor & open) Figure 35 – External protection enable @ 85Vac Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
References
12
References
[1]
Infineon Technologies, Datasheet “CoolSET™-F3R ICE3RBR0665JZ 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-3RBR0665JZ
29
V1.0, 2014-07-22
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