Application Note, V1.2, Aug 2010 A N - E V A L 3 B R 0 6 6 5 JF 100W 18V SMPS Evaluation Board with CoolSET® F3R ICE3BR0665JF 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, 168 Kallang Way, 349253 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. 100W 18V Demo board using ICE3BR0665JF on board Revision History: 2010-08-11 Previous Version: V1.1 V1.2 Page Subjects (major changes since last revision) 1, 5, 10 Change demo board name to EVAL3BR0665JF ® 100W 18V SMPS Evaluation Board with CoolSET F3R ICE3BR0665JF: 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-PS0020 100W 18V Demo board using ICE3BR0665JF on board 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 ....................................................................................................................................9 Component side component legend ...............................................................................................9 Solder side copper & component legend ........................................................................................9 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 ......................................................................................................................10 Introduction....................................................................................................................................10 Line Input.......................................................................................................................................10 Start up..........................................................................................................................................10 Operation mode ............................................................................................................................10 Soft start ........................................................................................................................................10 RCD clamper circuit ......................................................................................................................10 Peak current control of primary current.........................................................................................10 Output Stage .................................................................................................................................11 Feedback and regulation...............................................................................................................11 Blanking Window for Load Jump...................................................................................................11 Active Burst Mode .........................................................................................................................11 Jitter mode.....................................................................................................................................11 Protection modes ..........................................................................................................................12 8 Component List ...........................................................................................................................13 9 Transformer Construction..........................................................................................................14 10 10.1 10.2 10.3 10.4 10.5 10.6 Test Results .................................................................................................................................15 Efficiency .......................................................................................................................................15 Input Standby Power .....................................................................................................................16 Line Regulation .............................................................................................................................17 Load Regulation ............................................................................................................................18 Max. Overload Output Power........................................................................................................18 Conducted EMI..............................................................................................................................19 11 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 11.10 11.11 Waveforms and Scope Plots......................................................................................................20 Start up at Low and High AC Line Input Voltage and 100W load .................................................20 Drain to Source Voltage and Current during 100W load Operation..............................................20 Load Transient Response (Load jump from 10% to 100% Load).................................................21 AC Output Ripple during 100W.....................................................................................................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 opto-coupler – Auto Restart..................................................25 External Auto restart enable..........................................................................................................25 Frequency Jittering........................................................................................................................26 12 References ...................................................................................................................................27 Application Note 4 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 1 Abstract This document is an engineering report that describes a universal input power supply designed in an 18V ®1 100W off line flyback converter that utilizes the IFX F3R CoolSET ICE3BR0665JF. 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 ICE3BR0665JF 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 – EVAL3BR0665JF 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 6060 100W 18V Demo board using ICE3BR0665JF on board 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 and current 18V +/- 2% Output current 5.56A Output power 100W Average Efficiency >85% at 115Vac & 230Vac Output ripple voltage @ 100W load < 100mVp-p Application Note 6 2010-08-11 Application Note N VAR1 S10K275 C2 0.33uF/275V 7 EMI 1 2 x 15mH, 2.3A *RT1 C5 0.1uF C1 0.22uF/275V R4 0.27R IC3 C9 100pF R3 0.56R 5 GND 6 FB C8 1nF 4 Vcc D1 UF4005 C7 0.1uF 1 DRAIN C3 270uF/400V 3 BA ICE3BR0665JF 2 CS BR1 KBU6G R1 33k/2W 100W 18V SMPS Demoboard with ICE3BR0665JF(V0.3) Eric Kok/ 13 Mar 2009 85V - 265Vac L + + 4A F1 Z1 22V R2a 100R R2 10R 2 IC1 SFH617A-3 1 10R R11 R7 1.1K IC2 TL431 750R R6 2200uF/25V R5 130k L1 C14 + R9 62k 1% 220uF/35V 1.5uH R8 10k 1% R10 0R C10 + 2200uF25V C12 68nF *R8a 2200uF/25V C15 + C11 10pF MBR20H150CT C13 + D3 2.2nF C17 TR1 LP=130uH 3 CY1 4 D2 1N4148 C6 22uF/35V C4 10nF/1kV 2.2nF/250V,Y1 COM 18V/5.56A 6060 100W 18V Demo board using ICE3BR0665JF on board 5 Circuit Diagram Figure 2 – 100W 18V ICE3BR0665JF power supply Schematic 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board ® 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, C5, C7, C8 and opto-coupler ground. • Vcc ground includes the Vcc capacitor 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 8 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 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 9 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 7 Circuit Description 7.1 Introduction The EVAL3BR0665JF demo board is an off line flyback switch mode power supply (SMPS) using the ® ICE3BR0665JF integrated power IC from the Infineon CoolSET F3R family. The circuit, shown in Figure 2, details an 18V, 100W 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 EMI1, X-capacitors 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 ICE3BR0665JF, 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 ICE3BR0665JF, 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. 7.4 Operation mode During operation, the Vcc pin is supplied via a separate transformer winding with associated rectification D2 and buffering and filtering capacitors C5 and C6. 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 . 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 ICE3BR0665JF 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. +/-2% (refer to Figure 13). 1 V(BR)DSS = 650V @ Tj = 110°C Application Note 10 2010-08-11 6060 7.8 100W 18V Demo board using ICE3BR0665JF on board Output Stage The power is coupled to the secondary side through an ultra fast recovery diode D3. The capacitor C10, C13 and C15 provide energy buffering and the cascading LC filter L1 and C14 is used to reduce the output voltage ripple. The capacitor C10, C13 and C15 are 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. Opto-coupler IC2 is used to transmit the control signal to the “Feedback” input of the ICE3BR4765JF device. The selected opto-coupler 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, C5 (external capacitor at BA pin) = 0.1uF, IBK (internal charging current) = 13uA Blanking time (total) = 20ms + C5 X (4-0.9)/IBK = 43.9ms Note: A filter capacitor (e.g. 68nF (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 1.25V, 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 0.25V 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 saw-tooth between 3.0 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. 7.12 Jitter mode The ICE3BR0665JF 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. Application Note 11 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 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. ICE3BR0665JF 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 > 20.5V & 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 12 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 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 40 41 42 43 44 45 Application Note Circuit code BR1 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C17 CY1 D1 D2 D3 EMI1 FUSE1 FB1 IC1 IC2 IC3 J1 ~ J4 L1 R1 R2 R2a R3 R4 R5 R6 R7 R8 R8A R9 R10 R11 VAR1 TR1 Z1 Part Type KBU6G 6A 400V 0.22µF, 275V 0.33µF, 275V 270µF, 400V 10n, 1kV 0.1µF, 63V 22µF, 35V 0.1µF, 63V 1nF, 63V 100pF, 1kV 2200µF, 25V 270pF, 63V 220nF, 63V 2200µF, 25V 220µF, 35V 2200µF, 25V 2.2nF, 100V 2.2nF, 250V UF4005 UF4003 MBR20H150CT 2X15mH, 2.3A 4A 250V Ferrite Bead SFH617-2 TL431 ICE3BR0665JF Jumper 1.5µH 33K, 2W 0R 100R, 1/4W 0.51R, 1%, 1W 0.27R, 1%, 1W 130K, 1/4W 240R, 1/4W 1k1, 1/4W 560k, 1%, 1/4W 22k, 1%, 1/4W 100k, 1%, 1/4W 33k, 1%, 1/4W 10R,1/4W S10K 275V ER35L,BH1/N67, Lp=130µH 24V zener 13 Quantity 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 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 9 Transformer Construction Core and material: EER35L, BH1 or N67 Bobbin: ER35L (12 pin) Vertical Version Primary Inductance, Lp = 130 uH+3%, measured between pin 5 and pin 6 (Gapped to Inductance) Transformer structure: Figure 5 – Transformer structure and top view of transformer complete Wire size requirement: Start Stop No. of turns Wire size layer 4 6 13 3 x AWG#27 ½ Primary 7,8 9,10 5 7 X AWG#25 Secondary 1 2 4 20 X AWG#33 Auxiliary 5 4 13 3 x AWG#27 ½ Primary Application Note 14 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 10 Test Results 10.1 Efficiency Active-Mode Efficiency versus AC Line Input Voltage 90.00 Efficiency [ % ] 88.00 86.5 85.8 86.00 84.0 84.00 86.2 86.8 87.1 86.6 86.3 180 230 87.0 85.8 85.0 82.00 82.3 80.00 85 115 150 265 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 95.00 Efficiency [ % ] 85.00 84.2 80.00 87.2 86.6 86.0 90.00 86.2 85.8 50 75 87.1 85.0 72.6 75.00 70.00 65.00 64.4 60.00 0 25 100 Output Power [ W ] Vin=115Vac Vin=230Vac Figure 7 – Efficiency vs. Output Power @ 115Vac and 23OVac Application Note 15 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 10.2 Input Standby Power Stanby Power @ no-load versus AC Line Input Voltage 100 Input Power [ mW ] 84.30 96.60 80 67.70 61.60 60 52.10 56.20 40 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 Pow e r @ 0.5W load versus AC Line Input Voltage Input Power [ W ] 1.10 0.90 0.68 0.69 85 115 0.72 0.75 0.78 0.79 0.70 0.50 0.30 150 180 230 265 AC Line Input Voltage [ Vac ] Po=0.5W Figure 9 – Input Standby Power @ 0.5W load versus AC Line Input Voltage (Equipment: Yokogawa WT210 power meter – using integration mode) Application Note 16 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board Standby Pow er Efficiency @ 0.5W & 0.3W load versus AC Line Input Voltage 80 73.39 75 72.65 Efficiency [ % ] 69.82 70 67.02 64.44 63.62 230 265 65 60 55 50 85 115 150 180 AC Line Input Voltage [ Vac ] Pout=0.5W Figure 10 – Standby Power Efficiency @ 0.5W load versus AC Line Input Voltage 10.3 Line Regulation O utpu t V o ltage [ V ] Line Regulation : Output Voltage @ Full Load versus AC Line Input Voltage 18.50 18.04 18.04 18.04 18.04 18.04 18.04 85 115 150 180 230 265 18.00 17.50 AC Line Input Voltage [ Vac ] Vo @ full load Figure 11 – Line Regulation vs. AC Line Input Voltage Application Note 17 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 10.4 Load Regulation Load Regulation: Vout versus Outoput Power Ouput Voltage [ V ] 18.50 18.07 18.00 18.07 18.07 18.06 18.07 18.05 18.06 18.04 18.05 18.04 17.50 0 25 50 75 100 Output Pow er [ W ] Output Voltage @ 230Vac Output Voltage @ 115Vac Figure 12 – Load Regulation vs. AC Line Input Voltage 10.5 Max. Overload Output Power Max. Overload Output & Input Pow er ( Peak Pow er ) versus AC Line Input Voltage Max. O verload Output Pow er [ W ] Pin=132.33±4.05% & Pout=111.06±1.29% 140 135 130 125 120 115 110 105 100 134.03 137.7 111.97 85 112.51 115 131.23 129 112.33 128 111.43 150 180 AC Line Input Voltage [ V ] Peak Output Power 126.97 110.52 109.62 230 265 Po_max = 126.65V±1.8% Peak Input Power Figure 13 – Overload Output Power (Over Current Shut Off Threshold) vs. AC Line Input Voltage Application Note 18 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 10.6 Conducted EMI The conducted EMI was measured by Schaffner (SMR4503) and followed the test standard of EN55022 class B. The demo board was set up at maximum load (100W) with input voltage of 115Vac and 230Vac. 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 (100W) 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 (100W) with 230 Vac (Line) Application Note 19 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 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 100W 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 = 0.49s, Soft start time = 20ms Startup time = 0.48s, Soft start time = 20ms Figure 16 – Startup @ Vin=85Vac & 100W load Figure 17 – Startup @ Vin=265Vac & 100W load 11.2 Drain to Source Voltage and Current during 100W 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 = 40.6% Duty cycle = 13% Figure 18 – Operation @ Vin = 85Vac & 100W load Figure 19 – Operation @ Vin = 265Vac & 100W load Application Note 20 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 11.3 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 20 – Load jump @ Vin=85Vac from 10W to 100W load Figure 21 – Load jump @ Vin=265Vac from 10W to 100W load 11.4 AC Output Ripple during 100W Channel 2; C2 : Output Ripple Voltage (Vo_ripple) Channel 2; C2 : Output Ripple Voltage (Vo_ripple) Vo_ripple_pk to pk = 100mV Vo_ripple_pk to pk = 100mV Probe Terminal end with decoupling capacitor 0.1uF(ceramic) & 10uF(Electrolytic), 20MHz filter of Figure 22 – AC output ripple @ Vin=85Vac and 100W load Application Note Probe Terminal end with decoupling capacitor of 0.1uF(ceramic) & 10uF(Electrolytic), 20MHz filter Figure 23 – AC output ripple @ Vin=265Vac and 100W load 21 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 11.5 Active Burst Mode at 0.5W load Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Current Sense Voltage (VCS) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Blanking time to enter burst mode : appr.20ms Figure 24 – Active burst mode @ Vin=85Vac and step from 5.56A to 0.03A Channel 1; C1 : Drain Source voltage (VDS) Channel 2; C2 : Current Sense Voltage (VCS) Channel 3; C3 : Feedback voltage (VFB) Channel 4; C4 : BA Voltage (VBA) Blanking time to enter burst mode : appr.20ms Figure 25 – Active burst mode @ Vin=265Vac and step from 5.56A to 0.03A Channel 2; C2 : Output Voltage (Vo) Channel 2; C2 : Output Voltage (Vo) Vo_ripple_pk to pk = 50mV Probe Terminal end with decoupling capacitor of 0.1uF(ceramic) & 10uF(Electrolytic), 20MHz filter Vo_ripple_pk to pk = 50mV Probe Terminal end with decoupling capacitor of 0.1uF(Ceramic) & 10uF(Electrolytic), 20MHz filter Figure 26 – Output ripple at active burst mode @ Vin=85Vac and 0.5W load Figure 27 – Output ripple at active burst mode @ Vin=265Vac and 0.5W load Application Note 22 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 11.6 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>20.5V & VFB >4.5V during soft start period Figure 28 – 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>20.5V & VFB >4V during soft start period Figure 29 – Vcc overvoltage protection @ Vin=265Vac; 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>25.5V Figure 30 – Vcc overvoltage protection @ Vin=85Vac; R9 disconnected after system start up with no load(delete Z1) 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>25.5V Figure 31 – Vcc overvoltage protection @ Vin=265Vac; R9 disconnected after system start up with no load(delete Z1) Application Note 23 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 11.7 Over load protection – Auto Restart Channel 1; C1 : Output Voltage (VO) Channel 2; C2 : Output current (IO) 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 (46ms). Figure 32 – Over load protection with extended blanking time @ Vin=85Vac; output power step up from 5.56A to 7A load(C5 = 0.1uF) Channel 1; C1 : Output Voltage (VO) Channel 2; C2 : Output current (IO) 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 (46ms). Figure 33 – Over load protection with extended blanking time @ Vin=265Vac; output power step up from 5.56A to 7A load(C5 = 0.1uF) 11.8 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) 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. System enters auto-restart when VFB>4.5V, VBA >4V with (built-in+extendable) blanking time. Figure 34 – Open loop protection with extended blanking time @ Vin=85Vac; R9 disconnected during system operation at 100W load(C5=0.1µF) Figure 35 – Open loop protection with extended blanking time @ Vin=265Vac; R9 disconnected during system operation at 100W load(C5=0.1µF) Application Note 24 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 11.9 Vcc under voltage protection/Short opto-coupler – 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 36 – Short opto-coupler protection @ Vin=85Vac; Short the transistor of opto-coupler during system operation. Figure 37 – Short opto-coupler protection @ Vin=265Vac; Short the transistor of opto-coupler during system operation. 11.10 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 38 – Auto restart enable by trigger BA pin @ Figure 39– Auto restart enable by trigger BA pin @ Vin=265Vac; supply BA pin to 0.2V by function generator (C5=0.1uF) Vin=85Vac; supply BA pin to 0.2V by function generator (C5=0.1uF) Application Note 25 2010-08-11 6060 11.11 100W 18V Demo board using ICE3BR0665JF on board Frequency Jittering Channel 1; C1 : Drain Source voltage (VDS) Channel 1; C1 : Drain Source voltage (VDS) Frequency changing from 63.1kHz ~ 67.1kHz, Jitter period is set at 4ms internally Frequency changing from 62.9kHz ~ 67.1kHz, Jitter period is set at 4ms internally Figure 40 – Frequency change shown at VDS @ Vin=85Vac Figure 41 – Frequency change shown at VDS @ and 100W Load Vin=265Vac and 100W Load Application Note 26 2010-08-11 6060 100W 18V Demo board using ICE3BR0665JF on board 12 References ® [1] Infineon Technologies, Datasheet “CoolSET -F3R ICE3BR0665JF Off-Line SMPS Current Mode ® Controller with Integrated 650V CoolMOS and Startup Cell (Frequency Jitter Mode) in FullPak” [2] Kok Siu Kam Eric, Kyaw Zin Min, Infineon Technologies, Application Note “ AN-PS0028, ®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 27 TM ICE2xXXX for OFF- 2010-08-11