ICE3BS02L

D a t a s he e t , V e rs i o n 1 . 1, 28 S e p 2 0 0 5 F3 ICE3BS02L Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell and Latched off Mode Power Management & Supply N e v e r s t o p t h i n k i n g . F3 latched off version Revision History: 2005-09-28 Previous Version: V1.0 Page Datasheet Subjects (major changes since last revision) For questions on technology, delivery and prices please contact the Infineon Technologies Offices in Germany or the Infineon Technologies Companies and Representatives worldwide: see our webpage at http://www.infineon.com Edition 2005-09-28 Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 München © Infineon Technologies AG 1999. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as warranted 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. Infineon Technologies is an approved CECC manufacturer. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide (see address list). 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. F3 ICE3BS02L Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell and Latched off Mode Product Highlights • Active Burst Mode to reach the lowest Standby Power Requirements < 100mW • Latched Off Mode and Auto Restart Mode to increase robustness and safety of the system • Adjustable Blanking Window for high load jumps to increase system reliability • PB-free Plating and RoHS compliant test PG-DIP-8-6 Features Description • • The F3 Controller provides Active Burst Mode to reach the lowest Standby Power Requirements 140°C t Max. Ripple < 1% Control Unit FB Figure 17 The VCC voltage is observed by comparator C1 if 21V is exceeded. The output of C1 is combined with the output of C4 which observes FB signal if 4.8V is exceeded. Therefore the overvoltage detection is only activated if the FB signal is t Figure 16 Version 1.1 Latched Off Mode Signals in Active Burst Mode 13 28 Sep 2005 F3 ICE3BS02L Functional Description 3.6.3.2 outside the operating range > 4.8V, e.g. when Open Loop happens. This means any small voltage overshoots of VVCC during normal operating can not start the Latched Off Mode. The internal Voltage Reference is switched off once Latched Off Mode is entered in order to reduce the current consumption of the IC as much as possible. Latched Off Mode can only be reset by decreasing VVCC < 6V. In this stage, only the UVLO is working which controls the Startup Cell by switching on/off at VVCCon/VVCCoff. During this phase, the average current consumption is only 300µA. As there is no longer a self- supply by the auxiliary winding, VCC drops. The Undervoltage Lockout switches on the integrated Startup Cell when VCC falls below 8.5V. The Startup Cell is switched off again when VCC has exceeded 15V. Once the Latched Off Mode was entered, there is no Start Up Phase after VCC has exceeded the switch-on level of the Undervoltage Lockout. Therefore VCC changes between the switch-on and switch-off levels of the Undervoltage Lockout with a saw tooth shape (see Figure 18). SoftS 6.5V 5kΩ 1 S1 G2 Voltage Reference C3 5.4V & 4.8V C4 G5 FB 15V Figure 19 8.5V IVCCStart t VOUT Auto Restart Mode Control Unit Auto Restart Mode In case of Overload or Open Loop, FB exceeds 4.8V which will be observed by C4. At this time S1 is released that VSoftS can increase. If VSoftS exceeds 5.4V which is observed by C3, Auto Restart Mode is entered as both inputs of the gate G5 are high. In combining the FB and SoftS signals, there is a blanking window generated which prevents the system to enter Auto Restart Mode due to large load jumps. This time window is the same as for the Active Burst Mode and can therefore be adjusted by the external CSoftS. In case of VCC undervoltage, the IC enters into the Auto Restart Mode and starts a new startup cycle. Short Optocoupler also leads to VCC undervoltage as there is no self supply after activating the internal reference and bias. In contrast to the Latched Off Mode, there is always a Startup Phase with switching cycles in Auto Restart Mode. After this Start Up Phase, the conditions are again checked whether the failure mode is still present. Normal operation is resumed once the failure mode is removed that had caused the Auto Restart Mode. 1.05mA t Signals in Latched Off Mode The Thermal Shutdown block monitors the junction temperature of the IC. After detecting a junction temperature higher than 140°C, Latched Off Mode is entered. The signals coming from the temperature detection and VCC overvoltage detection are fed into a spike blanking with a time constant of 8.0µs to ensure system reliability. Furthermore, a short winding or short diode on the secondary side can be detected by the comparator C11 which is in parallel to the propagation delay compensated current limit comparator C10. In normal operating mode comparator C10 keeps the maximum level of the CS signal at 1V. If there is a failure such as short winding or short diode, C10 is no longer able to limit the CS signal at 1V. C11 detects then the over current and enters immediately the Latched Off Mode to keep the SMPS in a safe stage. Version 1.1 RSoftS 4.4V VVCC Figure 18 Auto Restart Mode 14 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4 Electrical Characteristics Note: All voltages are measured with respect to ground (Pin 8). The voltage levels are valid if other ratings are not violated. 4.1 Note: Absolute Maximum Ratings Absolute maximum ratings are defined as ratings, which when being exceeded may lead to destruction of the integrated circuit. For the same reason make sure, that any capacitor that will be connected to pin 7 (VCC) is discharged before assembling the application circuit. Parameter Symbol Limit Values min. max. Unit HV Voltage VHV - 500V V VCC Supply Voltage VVCC -0.3 22 V FB Voltage VFB -0.3 6.5 V SoftS Voltage VSoftS -0.3 6.5 V Gate Voltage VGate -0.3 22 V CS Voltage VCS -0.3 6.5 V Junction Temperature Tj -40 150 °C Storage Temperature TS -55 150 °C Total Power Dissipation Ptot - 0.9 W Thermal Resistance Junction-Ambient RthJA - 90 K/W ESD Capability(incl. HV Pin) VESD - 3 kV 1) Remarks Internally clamped at 11.5V Tamb < 50°C Human body model1) According to EIA/JESD22-A114-B (discharging a 100pF capacitor through a 1.5kΩ series resistor) 4.2 Note: Operating Range Within the operating range the IC operates as described in the functional description. Parameter VCC Supply Voltage Symbol VVCC Junction Temperature of Controller TjCon Version 1.1 Limit Values Unit min. max. VVCCoff 20 V -25 130 °C 15 Remarks Max value limited due to thermal shut down of controller 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4.3 4.3.1 Note: Characteristics Supply Section The electrical characteristics involve the spread of values within the specified supply voltage and junction temperature range TJ from – 25 °C to 130 °C. Typical values represent the median values, which are related to 25°C. If not otherwise stated, a supply voltage of VCC = 15 V is assumed. Parameter Symbol Limit Values min. typ. max. Unit Test Condition Start Up Current IVCCstart - 160 220 µA VVCC =14V VCC Charge Current IVCCcharge1 0.55 1.05 1.60 mA VVCC = 0V IVCCcharge2 - 0.88 - mA VVCC =14V Leakage Current of Start Up Cell IStartLeak - 0.2 20 µA VVCC =16V, VHV = 450V Supply Current with Inactive Gate IVCCsup1 - 5.5 7.0 mA Supply Current with Active Gate IVCCsup2 - 6.5 8.0 mA VSoftS = 4.4V IFB = 0, CLoad=1nF Supply Current in Latched Off Mode IVCClatch - 300 - µA IFB = 0 ISofts = 0 Supply Current in Auto Restart Mode with Inactive Gate IVCCrestart - 300 - µA IFB = 0 ISofts = 0 Supply Current in Active Burst Mode with Inactive Gate IVCCburst1 - 1.05 1.25 mA VVCC =15V VFB = 3.7V, VSoftS = 4.4V IVCCburst2 - 0.95 1.15 mA VVCC = 9.5V VFB = 3.7V, VSoftS = 4.4V VCC Turn-On Threshold VCC Turn-Off Threshold VCC Turn-On/Off Hysteresis VVCCon VVCCoff VVCChys 14.2 8.0 - 15.0 8.5 6.5 15.8 9.0 - V V V 4.3.2 Internal Voltage Reference Parameter Trimmed Reference Voltage Version 1.1 Symbol VREF Limit Values min. typ. max. 6.37 6.50 6.63 16 Unit Test Condition V measured at pin FB IFB = 0 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4.3.3 PWM Section Parameter Symbol Limit Values Unit min. typ. max. fOSC1 61 67 73 kHz fOSC2 63 67 71 kHz Max. Duty Cycle Dmax 0.67 0.72 0.77 Min. Duty Cycle Dmin 0 - - PWM-OP Gain AV 3.5 3.7 3.9 Voltage Ramp Max Level VMax-Ramp - 0.85 - V VFB Operating Range Min Level VFBmin 0.3 0.7 - V VFB Operating Range Max level VFBmax - - 4.75 V FB Pull-Up Resistor RFB 16 20 27 kΩ SoftS Pull-Up Resistor RSoftS 39 50 62 kΩ Fixed Oscillator Frequency 1) Test Condition Tj = 25°C VFB < 0.3V CS=1V, limited by Comparator C41) The parameter is not subjected to production test - verified by design/characterization 4.3.4 Control Unit Parameter Symbol Limit Values min. typ. max. Unit Test Condition Deactivation Level for SoftS Comparator C7 by C2 VSoftSC2 3.85 4.00 4.15 V VFB > 5V Clamped VSoftS Voltage during Normal Operating Mode VSoftSclmp 4.23 4.40 4.57 V VFB = 4V Activation Limit of Comparator C3 VSoftSC3 5.20 5.40 5.60 V VFB > 5V SoftS Startup Current ISoftSstart - 1.3 - mA VSoftS = 0V Over Load & Open Loop Detection Limit for Comparator C4 VFBC4 4.62 4.80 4.98 V VSoftS > 5.6V Active Burst Mode Level for Comparator C5 VFBC5 1.23 1.30 1.37 V VSoftS > 5.6V Active Burst Mode Level for Comparator C6a VFBC6a 3.85 4.00 4.15 V After Active Burst Mode is entered Active Burst Mode Level for Comparator C6b VFBC6b 3.25 3.40 3.55 V After Active Burst Mode is entered Version 1.1 17 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics Parameter Symbol Limit Values min. typ. max. Unit Test Condition VFB > 5V Overvoltage Detection Limit VVCCOVP 20 21 22 V Latched Thermal Shutdown1) TjSD 130 140 150 °C Spike Blanking tSpike - 8.0 - µs Power Down Reset for Latched Mode VVCCPD 4.0 6.0 7.5 V 1) After Latched Off Mode is entered The parameter is not subjected to production test - verified by design/characterization Note: The trend of all the voltage levels in the Control Unit is the same regarding the deviation except VVCCOVP and VVCCPD 4.3.5 Current Limiting Parameter Symbol Limit Values min. typ. max. Unit Test Condition dVsense / dt = 0.6V/µs (see Figure 12) Peak Current Limitation (incl. Propagation Delay Time of external MOS) Vcsth 0.97 1.02 1.07 V Peak Current Limitation during Active Burst Mode VCS2 0.232 0.257 0.282 V Leading Edge Blanking tLEB - 220 - ns VSoftS = 4.4V CS Input Bias Current ICSbias -1.0 -0.2 0 µA VCS =0V Over Current Detection for Latched Off Mode VCS1 1.570 1.66 1.764 V CS Spike Blanking for Comparator C11 tCSspike - 190 - ns Version 1.1 18 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4.3.6 Driver Section Parameter GATE Low Voltage GATE High Voltage Symbol VGATElow VGATEhigh Limit Values Unit Test Condition min. typ. max. - - 1.2 V VVCC = 5 V IGate = 5 mA - - 1.5 V VVCC = 5 V IGate = 20 mA - 0.8 - V IGate = 0 A - 1.6 2.0 V IGate = 20 mA -0.2 0.2 - V IGate = -20 mA - 11.5 - V VVCC = 20V CL = 4.7nF - 10.5 - V VVCC = 11V CL = 4.7nF - 7.5 - V VVCC = VVCCoff + 0.2V CL = 4.7nF GATE Rise Time (incl. Gate Rising Slope) trise - 150 - ns VGate = 2V ...9V1) CL = 4.7nF GATE Fall Time tfall - 55 - ns VGate = 9V ...2V1) CL = 4.7nF GATE Current, Peak, Rising Edge IGATE -0.5 - - A CL = 4.7nF2) GATE Current, Peak, Falling Edge IGATE - - 0.7 A CL = 4.7nF2) 1) Transient reference value 2) The parameter is not subjected to production test - verified by design/characterization Version 1.1 19 28 Sep 2005 F3 ICE3BS02L Outline Dimension 5 Outline Dimension PG-DIP-8-6 (Leadfree Plating Plastic Dual In-Line Outline) Figure 20 PG-DIP-8-6 (Leadfree Plating Plastic Dual In-Line Outline) Dimensions in mm Version 1.1 20 28 Sep 2005 Total Quality Management Qualität hat für uns eine umfassende Bedeutung. Wir wollen allen Ihren Ansprüchen in der bestmöglichen Weise gerecht werden. Es geht uns also nicht nur um die Produktqualität – unsere Anstrengungen gelten gleichermaßen der Lieferqualität und Logistik, dem Service und Support sowie allen sonstigen Beratungs- und Betreuungsleistungen. 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