Application Note, V1.1, Aug 2010 A N - E V A L 3 B R 2 5 6 5 JF 40W 18V SMPS Evaluation Board with CoolSET®-F 3 R I C E 3 B R 2 5 6 5 J F Power Management & Supply N e v e r s t o p t h i n k i n g . Edition 2010-08-11 Published by Infineon Technologies Asia Pacific, 8 Kallang Sector, 349282 Singapore, Singapore © Infineon Technologies AP 2008. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your 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 your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems 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. 40W 18V Demo board using ICE3BR2565JF Revision History: 2010-08-11 Previous Version: 1.0 V1.1 Page Subjects (major changes since last revision) 1, 5, 9 Change demo board name to EVAL3BR2565JF ® 40W 18V SMPS Evaluation Board with CoolSET -F3R ICE3BR2565JF: License to Infineon Technologies Asia Pacific Pte Ltd Kyaw Zin Min Kok Siu Kam Eric We Listen to Your Comments Any information within this document that you feel is wrong, unclear or missing at all? Your feedback will help us to continuously improve the quality of this document. Please send your proposal (including a reference to this document) to: [email protected] AN-PS0022 40W 18V Demo board using ICE3BR2565JF Table of Contents Page 1 Abstract..........................................................................................................................................5 2 Evaluation Board...........................................................................................................................5 3 List of Features .............................................................................................................................6 4 Technical Specifications ..............................................................................................................6 5 Circuit Diagram .............................................................................................................................7 6 6.1 6.2 PCB Layout ....................................................................................................................................8 Component side component legend ...............................................................................................8 Solder side copper & component legend ........................................................................................8 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 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.........................................................................................10 Output Stage .................................................................................................................................10 Feedback and regulation...............................................................................................................10 Blanking Window for Load Jump...................................................................................................10 Active Burst Mode .........................................................................................................................10 Jitter mode.....................................................................................................................................11 Protection modes ..........................................................................................................................11 8 Component List ...........................................................................................................................12 9 Transformer Construction..........................................................................................................13 10 10.1 10.2 10.3 10.4 10.5 10.6 Test Results .................................................................................................................................14 Efficiency .......................................................................................................................................14 Input Standby Power .....................................................................................................................15 Line Regulation .............................................................................................................................16 Load Regulation ............................................................................................................................17 Max. Overload Output Power........................................................................................................17 Conducted EMI..............................................................................................................................18 11 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 11.10 11.11 11.12 Waveforms and Scope Plots......................................................................................................19 Start up at Low and High AC Line Input Voltage and 40W load ...................................................19 Soft start at Low and High AC Line Input Voltage and 40W load .................................................19 Frequency Jittering........................................................................................................................20 Drain to Source Voltage and Current during 40W Load Operation ..............................................20 Load Transient Response (Load jump from 10% to 100% Load).................................................21 AC Output Ripple during 40W.......................................................................................................21 Active Burst Mode at 0.5W load....................................................................................................22 Vcc overvoltage protection – Auto Restart....................................................................................23 Over load protection – Auto Restart..............................................................................................24 Open loop protection – Auto Restart.............................................................................................24 Vcc under voltage protection/Short optocoupler – Auto Restart...................................................25 External Auto restart enable..........................................................................................................25 12 12.1 Appendix ......................................................................................................................................26 Slope compensation for CCM operation .......................................................................................26 13 References ...................................................................................................................................26 Application Note 4 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 1 Abstract This document is an engineering report that describes a universal input power supply designed in a 18V ®1 40W off line flyback converter that utilizes the IFX F3R CoolSET ICE3BR2565JF. The application board is operated in discontinuous conduction mode (DCM) and running at 67 kHz switching frequency. It has one output voltage with secondary side control regulation. It is especially suitable for AC/DC power supply such as LCD monitors, adapters for printers and notebook computers, DVD players and recorder, Blue-Ray DVD player and recorder, set-top boxes and industrial auxiliary power supplies. The ICE3BR2565JF is a current ® mode control PWM integrated with CoolMOS . With the 650V startup cell, active burst mode and BiCMOS technologies, the standby power can be <100mW at no load and Vin = 265Vac. The frequency jitter mode and the soft gate drive can give a low EMI performance. The built-in 20ms blanking window and the extendable blanking time concept can prevent the IC from entering the auto restart mode due to over load protection unintentionally. The outstanding propagation delay compensation feature can allow a very precise current limit between low line and high line. The IC provides auto-restart protection mode for Vcc overvoltage, over temperature, over load, open loop, Vcc under-voltage, short opto-coupler. In case it needs customer defined protection, the external auto restart enable feature can fulfill the requirement. 2 Evaluation Board Figure 1 – EVAL3BR2565JF This document contains the list of features, the power supply specification, schematic, bill of material and the transformer construction drawing. Typical operating characteristics and performance curves with scope waveforms are presented at the rear of the report. 1 ® ® CoolSET is a trade mark of Infineon which is a PWM control IC integrated with CoolMOS in one package. Application Note 5 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 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 67 kHz internally fixed switching frequency Auto Restart Protection Mode for Over-load, Open Loop, Vcc Undervoltage, Over-temperature & Vcc Over-voltage Built-in Soft Start Built-in blanking window with extendable blanking time for short duration high current External auto-restart enable 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 50Hz, 60Hz Input Standby Power < 100mW @ no load; < 1W @ 0.5W load Output voltage 18V +/- 1% Output current 2.23A Output power 40W Average Efficiency (25%,50%,75%,100%) >80% Output ripple voltage @ 40W load < 100mVp-p Application Note 6 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 5 Circuit Diagram 2.2nF/250V,Y1 CY1 *R11 *C17 MUR815 D3 5 2A L 85V - 265Vac 0.22uF/275V VAR1 S10K275 C1 BR1 2KBB80R 0.1uF/275V L1 27mH 1.7A C2 3 D1 UF4005 RT1 C14 + C10 + 220uF/25V 1800uF/25V C3 100uF/400V 18V/2.23A 4.7uH C4 2.2nF/630V R1 33k/2W + F1 L2 7 8 COM 4 N NTC 1R TR1 LP=215uH R4 0.82R R3 0.82R 2 C9 100pF C6 22uF/35V + 3 BA 1 *FB1 R2 1 DRAIN 2 CS 2R D2 1N4148 IC3 ICE3BR2565JF R6 750R C5 270pF 5 GND 6 FB 4 Vcc C8 1nF C7 0.1uF R9 100k 1% R7 1.2k 4 1 3 2 R2a 39R IC1 C11 270pF R10 24k 1% C12 220nF R5 120k SFH617A-3 IC2 TL431 ZD1 22V *R8a R8 20k 1% 40W 18V SMPS Demoboard with ICE3BR2565JF(V0.1) Kyaw Zin Min,Eric Kok / 25 June 2008 Figure 2 – 40W 18V ICE3BR2565JF power supply Schematic ® N.B.: In order to get the optimized performance of the CoolSET , the grounding of the PCB layout must be connected very carfefully. 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, C5, C7, C8 and opto-coupler ground. • Vcc ground includes the Vcc capctior ground, C6 and the auxiliary winding ground pin of the power transformer. • Current Sense resistor ground includes current sense resistor R3 and R4. • EMI return ground includes Y capacitor, CY1. Application Note 7 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 6 PCB Layout 6.1 Component side component legend Figure 3 – Component side Component Legend – View from Component Side 6.2 Solder side copper & component legend Figure 4 – Solder side copper – View from Component Side Application Note 8 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 7 Circuit Description 7.1 Introduction The EVAL3BR2565JF demo board is an off line flyback switch mode power supply (SMPS) using the ® ICE3BR2565JF integrated power IC from the Infineon CoolSET -F3R family. The circuit, shown in Figure 2, details a 18V, 40W power supply that operates from an AC line input voltage range of 85Vac to 265Vac, suitable for applications requiring either an open frame supply or an enclosed adapter. 7.2 Line Input The AC input side comprises the input fuse F1 as over-current protection. The conducted EMI choke L1, Xcapacitors C1 and C2 and Y-capacitor CY1 act as electromagnetic interference suppressors. A varistor VAR1 is added to absorb the line transient surge voltage while a NTC, RT1 is added to reduce the inrush surge current during start up. A rectified DC voltage (120V ~ 374V) is obtained through the bridge rectifier BR1 and the input bulk capacitor C3. 7.3 Start up Since there is a built-in startup cell in the ICE3BR2565JF, there is no need for external start up resistor. The startup cell is connecting the drain pin of the IC. Once the voltage is built up at the Drain pin of the ICE3BR2565JF, the startup cell will charge up the Vcc capacitor C6 and C7. 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. The startup delay time, tDELAY, is independent from the AC line input voltage and it can be estimated by the following equation: t DELAY = 7.4 VVCCon × CVcc 18 × 22 × 10 −6 = = 0.528 s I VCCch arg e 2 − I VCCstart 0.9 × 10 −3 − 150 × 10 −6 Operation mode During operation, the Vcc pin is supplied via a separate transformer winding with associated rectification D2 and buffering and filtering capacitors C6 and C7. Resistor R2 is used for current limiting. In order not to exceed the maximum voltage at Vcc pin, external zener diode Z1 and resistor R2a is added to clamp the voltage. 7.5 Soft start The Soft-Start time is built-in 20ms. After the Vcc hits UVLO at 18V, it starts the soft-start phase. 7.6 RCD clamper circuit ® While turns off the CoolMOS , the clamper circuit R1, C4 and D1 absorbs the current caused by transformer leakage inductance once the voltage exceeds clamp capacitor voltage. Finally drain to source voltage of ® 1 ® CoolMOS is lower than maximum break down voltage (V(BR)DSS = 650V ) of CoolMOS . 1 V(BR)DSS = 650V @ Tj = 110°C Application Note 9 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 7.7 Peak current control of primary current ® The CoolMOS drain source current is sensed via external shunt resistors R3 and R4 which determine the tolerance of the current limit control. Since ICE3BR2565JF 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. Besides, propagation delay compensation is implemented to ensure the maximum input current/power can be controlled in an even tighter manner. The demo board shows app. ±3.6% (refer to Figure 13). 7.8 Output Stage The power is coupled to the secondary side through an ultra fast recovery diode D3. The capacitor C10 provide energy buffering and the cascading LC filter L2 and C14 is used to reduce the output voltage ripple. The capacitor C10 is selected to have a low internal resistance (ESR) to minimize the output voltage ripple. 7.9 Feedback and regulation The output voltage is controlled by a TL431 reference control IC (IC2). This device incorporates the voltage reference as well as the error amplifier. Compensation network C11, C12, R5, R8, R8a, R9 and R10 constitutes the loop compensation circuit. 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 R6 and R7. Optocoupler IC1 is used to transmit the control signal to the “Feedback” input of the ICE3BR2565JF device. The selected optocoupler should meet DIN VDE 884 requirements for a wider creepage distance. 7.10 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. There are 2 modes for the blanking time setting; basic mode and the extendable mode. If there is no capacitor added to the BA pin, it would fall into the basic mode; i.e. the blanking time is set at 20ms. If a longer blanking time is required, a capacitor, C5 can be added to BA pin to extend it. The extended time can be achieved by an internal 13uA constant current at BA pin to charge C5 from 0.9V to 4.0V. Thus the overall blanking time is the addition of 20ms and the extended time. For example, CBK (external capacitor at BA pin) = 0.1uF, IBK (internal charging current) = 13uA Tblanking = Basic + Extended = 20ms + (4.0 − 0.9) × CBK = 43ms IBK Note: A filter capacitor (e.g. 270pF (min. value)) may be needed to add to the BA pin if the noises cannot be avoided to enter that pin in the physical PCB layout. Otherwise, some protection features may be mistriggered and the system may not be working properly. 7.11 Active Burst Mode 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; i.e. 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 1.22V, 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 1V to 0.26V 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 0.45mA. At burst mode, the FB voltage is changing like a sawtooth between 3.1 and 3.6V. To leave Burst Mode, FB voltage must exceed 4.5V. It will reset the Active Burst Mode and turn the SMPS into Normal Operating Mode. The maximum current; i.e. current sense voltage limit resume to 1V, can then be provided to stabilize VOUT. Application Note 10 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 7.12 Jitter mode The ICE3BR2565JF has frequency jittering feature to reduce the EMI noise. The jitter frequency is internally set at 67 kHz (+/-2.7 kHz) and the jitter period is set at 4ms. 7.13 Protection modes Protection is one of the major factors to determine whether the system is safe and robust. Therefore, sufficient protection is a must. ICE3BR2565JF provides all the necessary protections to ensure the system is operating safely. The protections include Vcc over-voltage, over-temperature, over-load, open loop, Vcc under-voltage, short opto-coupler, 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 re-start 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. Protection function Failure condition Vcc Over-voltage 1. Vcc > 25.5V & last for 120µs or 2. Vcc > 20.7V & FB > 4.5V & during soft start period Auto Restart Over-temperature (controller junction) TJ > 130°C Auto Restart Over-load / Open loop VFB > 4.5V and VBA > 4.0V (Blanking time counted from charging VBA from 0.9V to 4.0V ) Auto Restart Vcc Under-voltage / short Opto-coupler Vcc < 10.5V Auto Restart Auto-restart enable VBA < 0.33V Auto Restart Application Note Protection Mode 11 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 8 Component List Item 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 33 34 35 36 37 38 39 39 Application Note Designator BR1 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C14 CY1 D1 D2 D3 F1 IC1 IC2 IC3 L1 L2 PCB R1 R2 R2a R3 R4 R5 R6 R7 R8 R9 R10 RT1 TR1 VAR1 ZD1 Part Type 2KBB80R 0.22uF 275V 0.1uF 275V 100uF/400V 2.2nF 1kV 270pF 50V 22uF/35V 0.1uF 50V 1nF 50V 100pF/1kV 1800uF 25V 270pF 50V 220nF50V 220uF 25V 2.2nF/250V UF4005 1N4148 MUR815 2A 250V SFH617-A3 TL431 ICE3BR2565JF 27mH,1.7A 4.7uH 4.2A V 0.1 33k/2W 2R 39R 0.82R 1W(1%) 0.82R 1W(1%) 120k 750R 1.2k 20k 1% 100k 1% 24k 1% NTC 1ohm 215uH/EER28 BH1 S10K275 22V Zener Diode 12 QTY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Manufacturer Epcos Epcos Epcos Epcos Epcos Murata Epcos Murata Epcos Epcos Infineon Epcos NEC-Tokin Epcos - 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 9 Transformer Construction Core and material: EER28, BH1 Bobbin: EER28 (10pin) Vertical Version Primary Inductance, LP=215µH ±1%, measured between pin 4 and pin 5 (Gapped to Inductance) Transformer structure: Pin 5 18 turns 1 x AWG#25 Prim. Pin 3 Pin 8 9 turns 2 x AWG#25 Sec. Pin 2 Pin 1 Pin 7 7 turns 2 x AWG#30 Aux. Pin 3 18 turns 1 x AWG#25 Prim. Pin 4 Core centre limb Margin tape 3mm Bobbin Margin tape 3mm Figure 5 – Transformer structure and top view of transformer complete Wire size requirement: Application Note Start Stop No. of turns Wire size layer 3 5 18 1 x AWG#25 ½ Primary 7 8 9 2 X AWG#25 Secondary 1 2 7 2 X AWG#30 Auxiliary 4 3 18 1 x AWG#25 ½ Primary 13 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 10 Test Results 10.1 Efficiency Active Mode Efficiency versus AC Line Input Voltage E ffic ienc y [ % ] 90.00 84.42 85.00 85.18 85.25 85.5 84.5 85.1 84.92 150 180 230 82.59 85.4 84.31 83.1 80.00 80.1 75.00 85 115 265 AC Line Input Voltage [ Vac ] Full load efficiency Average Efficiency(25%,50%,75%,100%) Figure 6 – Efficiency vs. AC Line Input Voltage Efficiency versus Output Power 90.00 85.5 85.3 85.6 85.0 84.1 20 30 85.5 Efficiency [ % ] 85.00 78.6 80.00 83.3 83.1 75.00 73.0 70.00 65.00 0 10 40 Output Pow er [ W ] Vin=115Vac Vin=230Vac Figure 7 – Efficiency vs. Output Power @ 115 & 230 Vac Application Note 14 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 10.2 Input Standby Power Stanby Power @ no-load versus AC Line Input Voltage 80 Input Power [ mW ] 69.93 70 57.40 60 44.40 50 38.36 47.90 40.84 40 30 85 115 150 180 230 265 AC Line Input Voltage [ Vac ] Po = 0W Figure 8 – Input Standby Power @ no load vs. AC Line Input Voltage (Equipment: Yokogawa WT210 power meter – using integration mode) Standby Power @ 0.3W & 0.5W load versus AC Line Input voltage Input Power [ W ] 1.00 0.75 0.50 0.63 0.41 0.64 0.41 0.71 0.65 0.66 0.69 0.42 0.43 0.45 0.47 150 180 230 265 0.25 0.00 85 115 AC Line Input Voltage [ Vac ] Po=0.3W Po=0.5W Figure 9 – Input Standby Power @ 0.3W & 0.5W load versus AC Line Input Voltage (Equipment: Yokogawa WT210 power meter – using integration mode) Application Note 15 2010-08-11 40W 18V Demoboard using ICE3BR2565JF Standby Power Efficiency @ 0.3W & 0.5W load versus Input voltage 85 80.03 Efficiency [ % ] 80 78.65 77.09 75.66 73.04 75 75.30 70 70.31 73.85 72.13 70.81 65 67.67 64.75 60 85 115 150 180 230 265 AC Line Input Voltage [ Vac ] Po=0.3W Po=0.5W Figure 10 – Standby Power Efficiency @ 0.3W & 0.5W load versus AC Line Input Voltage 10.3 Line Regulation Line Regulation : Vo versus AC Line Input Voltage @ 40W load Output Voltage [ V ] 18.00 17.95 17.92 17.92 17.92 17.92 17.92 17.92 85 115 150 180 230 265 17.90 17.85 17.80 AC Line Input Voltage [ Vac ] Figure 11 – Line Regulation @ 40W load Application Note 16 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 10.4 Load Regulation Load Regulation: Vout versus Load @ Vin = 230Vac Ouput Voltage [ V ] 18.00 17.94 17.95 17.94 17.93 17.93 20 30 17.92 17.90 17.85 17.80 0 10 40 Output Pow er [ W ] Figure 12 – Load Regulation @ Vin-230Vac 10.5 Max. Overload Output Power M ax. O verlo ad O utp ut Po w er [ W ] Max. Overload Output & Input Pow er ( Peak Pow er ) versus AC Line Input Voltage 65 60 55 53.8 52.1 50.62 50.2 50 50 45 50.12 42.65 42.65 42.65 42.65 42.65 42.83 85 115 150 180 230 265 40 Pin_max=51.9 ± 3.6% Pout_max=42.73 ± 0.2% AC Line Input Voltage [ V ] Peak Output Power Peak Input Power Figure 13 – Overload Output Power (Over Current Shut Off Threshold) vs. AC Line Input Voltage Application Note 17 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 10.6 Conducted EMI The conducted EMI was measured by Schaffner (SMR4503) under test standard EN55022 or CISPR22 Calss B. The demo board was set up at maximum load (40W) with input voltage of 115Vac and 230Vac. The Red curve (upper one) is the Quasi Peak data and the Green curve (lower one) is the Average data. They all pass the standarad (dash line) with > 10dB margin. 80 EN_V_QP 70 EN_V_AV QP Pre Pk Pre AV Pre 60 50 dBµV 40 30 20 10 0 -10 0.1 1 10 100 -20 f / MHz Figure 14 – Max. Load (40W) with 115 Vac (Line) 80 EN_V_QP 70 EN_V_AV QP Pre Pk Pre AV Pre 60 50 dBµV 40 30 20 10 0 -10 0.1 1 10 100 -20 f / MHz Figure 15 – Max. Load (40W) with 230 Vac (Line) Application Note 18 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 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 40W load Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Startup time = 0.52s Startup time = 0.52s Figure 16 – Startup @ Vin=85Vac & 40W load Figure 17 – Startup @ Vin=265Vac & 40W load 11.2 Soft start at Low and High AC Line Input Voltage and 40W load Channel 1; C1 : CS voltage (VCS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Channel 1; C1 : CS voltage (VCS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Soft Star time = 19ms Soft Star time = 19ms Figure 18 – Soft Start @ Vin=85Vac & 40W load Figure 19– Soft Start @ Vin=265Vac & 40W load Application Note 19 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 11.3 Frequency Jittering 65.17kHz 65.17kHz 69.55kHz 69.56kHz Channel 1; C1 : Drain Source voltage (VDS) Channel 1; C1 : Drain Source voltage (VDS) Frequency changing from 65.17kHz ~ 69.56kHz, Jitter period is set at 4ms internally Frequency changing from 65.17kHz ~ 69.55kHz, Jitter period is set at 4ms internally Figure 20 – Frequency change shown at VDS @ Vin=85Vac Figure 21 – Frequency change shown at Vin=265Vac and 40W Load and 40W Load VDS @ 11.4 Drain to Source Voltage and Current during 40W Load Operation Channel 1; C1 : Drain Source Voltage (VDS) Channel 2; C2 : Drain Source Current (IDS) Channel 1; C1 : Drain Source Voltage (VDS) Channel 2; C2 : Drain Source Current (IDS) Duty cycle = 44.7% Duty cycle = 10.6% Figure 22 – Operation @ Vin = 85Vac & 40W load Figure 23–Operation @ Vin = 265Vac & 40W load Application Note 20 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 11.5 Load Transient Response (Load jump from 10% to 100% Load) Channel 1; C1 : Output Ripple Voltage (Vo) Channel 2; C2 : Output Current (Io) Channel 1; C1 : Output Ripple Voltage (Vo) Channel 2; C2 : Output Current (Io) Current step slew rate = 0.4A/us Current step slew rate = 0.4A/us Figure 24 – Load jump @ Vin=85Vac from 4W to 40W load Figure 25 – Load jump @ Vin=265Vac from 4W to 40W load 11.6 AC Output Ripple during 40W Channel 1; C1 : Output Ripple Voltage (Vo_ripple) Channel 1; C1 : Output Ripple Voltage (Vo_ripple) Vo_ripple_pk to pk = 55mV Vo_ripple_pk to pk = 55mV Probe Terminal end with decoupling capacitor 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter of Figure 26 – AC output ripple @ Vin=85Vac and 40W load Application Note Probe Terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Figure 27 – AC output ripple @ Vin=265Vac and 40W load 21 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 11.7 Active Burst Mode at 0.5W load Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Blanking time to enter burst mode is ~20ms after Vfb < 1.22V. Figure 28 – Active burst mode @ Vin=85Vac and step from 2.23A to 0.03A Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Blanking time to enter burst mode is ~20ms after Vfb < 1.22V. Figure 29 – Active burst mode @ Vin=265Vac and step from 2.23A to 0.03A Channel 2; C2 : Output Voltage (Vo) Channel 2; C2 : Output Voltage (Vo) Vo_ripple_pk to pk = 41mV Probe Terminal end with decoupling capacitor of 0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter Vo_ripple_pk to pk = 41mV Probe Terminal end with decoupling capacitor of 0.1uF(Ceramic) & 1uF(Electrolytic), 20MHz filter Figure 30 – Output ripple at active burst mode @ Vin=85Vac and 0.5W load Figure 31 – Output ripple at active burst mode @ Vin=265Vac and 0.5W load Application Note 22 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 11.8 Vcc overvoltage protection – Auto Restart Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback Voltage (VFB) Channel 4; C4 : BA voltage (VBA) System enters auto restart mode when VCC>20.7V & VFB >4.5V during soft start period Figure 32 – Vcc overvoltage protection @ Vin=85Vac; R9 disconnected before system start up with no load Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply voltage (VCC) Channel 3; C3 : Feedback Voltage (VFB) Channel 4; C4 : BA voltage (VBA) System enters auto restart mode when VCC>20.7V & VFB >4.5V during soft start period Figure 33 – Vcc overvoltage protection @ Vin=265Vac; R9 disconnected before system start up with no load Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supple voltage (VCC) Channel 3; C3 : Feedback Voltage (VFB) Channel 4; C4 : BA voltage (VBA) System enters auto restart mode when VCC>25.5V Figure 34 – Vcc overvoltage protection @ Vin=85Vac; R9 disconnected after system start up with light load Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supple voltage (VCC) Channel 3; C3 : Feedback Voltage (VFB) Channel 4; C4 : BA voltage (VBA) System enters auto restart mode when VCC>25.5V Figure 35 – Vcc overvoltage protection @ Vin=265Vac; R9 disconnected after system start up with light load Application Note 23 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 11.9 Over load protection – Auto Restart Channel 1; C1 : Drain to Source Voltage (VDS) Channel 2; C2 : Supply Current (VCC) Channel 3; C3 : Feedback Voltage (VFB) Channel 4; C4 : BA voltage (VBA) System enters auto-restart when VFB>4.5V, VBA >4V with (built-in+extendable) blanking time ≈45ms Figure 36 – Over load protection with extended blanking time @ Vin=85Vac; output power step up from 2.23A to 4A load(C5 = 0.1µF) 11.10 Channel 1; C1 : Drain to Source Voltage (VDS) Channel 2; C2 : Supply Current (VCC) Channel 3; C3 : Feedback Voltage (VFB) Channel 4; C4 : BA voltage (VBA) System enters auto-restart when VFB>4.5V, VBA>4V with (built-in+extendable) blanking time ≈45ms Figure 37 – Over load protection with extended blanking time @ Vin=265Vac; output power step up from 2.23A to 4A load(C5 = 0.1µF) Open loop protection – Auto Restart Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC)00 Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) System enters auto-restart when VFB>4.5V, VBA >4V with (built-in+extended) blanking time ≈42ms System enters auto-restart when VFB>4.5V, VBA >4V with (built-in+extended) blanking time ≈42ms Figure 38 – Open loop protection with extended blanking time @ Vin=85Vac; R9 disconnected during system operation at 40W load(C5=0.1µF) Figure 39 – Open loop protection with extended blanking time @ Vin=265Vac; R9 disconnected during system operation at 40W load(C5=0.1µF) Application Note 24 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 11.11 Vcc under voltage protection/Short optocoupler – Auto Restart Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) System enters Auto Restart mode when Vcc<10.5V System enters Auto Restart mode when Vcc<10.5V Figure 40 – Short optocoupler protection @ Vin=85Vac; Short the transistor of optocoupler during system operation. Figure 41 – Short optocoupler protection @ Vin=265Vac; 11.12 Short the transistor of optocoupler during system operation. External Auto restart enable Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Supply Voltage (VCC) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) System enters auto restart mode when Vba<0.33V System enters auto restart mode when Vba<0.33V Figure 42 – Auto restart enable by trigger BA pin @ Figure 43– Auto restart enable by trigger BA pin @ Vin=265Vac; Short BA pin during system operation Vin=85Vac; Short BA pin during system operation Application Note 25 2010-08-11 40W 18V Demoboard using ICE3BR2565JF 12 Appendix 12.1 Slope compensation for CCM operation This demo board is designed in Discontinuous Conduction Mode (DCM) operation. If the application is designed in Continuous Conduction Mode (CCM) operation where the maximum duty cycle exceeds the 50% threshold, it needs to add the slope compensation network. Otherwise, the circuitry will be unstable. In this case, three more components (2 ceramic capacitors C17 / C18 and one resistor R19) are needed to add as shown in the circuit diagram below. Figure 44 – Circuit Diagram Switch Mode Power Supply with Slope Compensation More information regarding how to calculate the additional components, see in the application note AN_SMPS_ICE2xXXX – available on the internet: www.infineon.com/CoolSET CoolSET F2. 13 References ® [1] Infineon Technologies, Datasheet “CoolSET -F3R ICE3BR2565JF Off-Line SMPS Current Mode ® Controller with Integrated 650V CoolMOS and Startup Cell (Frequency Jitter Mode) in FullPak” [2] Infineon Technologies, Application Note “ICE3BRxx65JF CoolSET -F3R (FullPak) new Jitter version Design Guide” [3] Infineon Technologies, Application Note “AN-SMPS-ICE2xXXX-1 CoolSET Line Switch Mode Power Supply (SMPS)” ® Application Note 26 TM ICE2xXXX for OFF- 2010-08-11