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 Never stop thinking. F3 latched off version Revision History: Previous Version: Page 2005-09-28 V1.0 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 • • • • • • • • • • • • • • • • 500V Startup Cell switched off after Start Up Active Burst Mode for lowest Standby Power @ light load controlled by Feedback Signal Fast load jump response in Active Burst Mode 67kHz internally fixed switching frequency Latched Off Mode for Overtemperature Detection Latched Off Mode for Overvoltage Detection Latched Off Mode for Short Winding Detection Auto Restart Mode for Overload and Open Loop Auto Restart Mode for VCC Undervoltage Blanking Window for short duration high current User defined Soft Start Minimum of external components required Max Duty Cycle 72% Overall tolerance of Current Limiting < ±5% Internal PWM Leading Edge Blanking Soft driving for low EMI Description The F3 Controller provides Active Burst Mode to reach the lowest Standby Power Requirements 140°C Control Unit FB Figure 17 t Latched Off Mode Figure 16 Signals in Active Burst Mode 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 Version 1.1 13 28 Sep 2005 F3 ICE3BS02L Functional Description 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). 3.6.3.2 Auto Restart Mode SoftS 6.5V 5kΩ RSoftS 4.4V 1 S1 G2 Voltage Reference C3 5.4V 4.8V C4 & G5 Auto Restart Mode Control Unit VVCC 15V FB Figure 19 Auto Restart Mode 8.5V IVCCStart 1.05mA t VOUT Figure 18 Signals in Latched Off Mode t 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. 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. Version 1.1 14 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4 Note: Electrical Characteristics 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. Symbol VHV VVCC VFB VSoftS VGate VCS Tj TS Ptot RthJA VESD -0.3 -0.3 -0.3 -0.3 -0.3 -40 -55 Limit Values min. max. 500V 22 6.5 6.5 22 6.5 150 150 0.9 90 3 V V V V V V °C °C W K/W kV Human body model1) Tamb < 50°C Internally clamped at 11.5V Unit Remarks Parameter HV Voltage VCC Supply Voltage FB Voltage SoftS Voltage Gate Voltage CS Voltage Junction Temperature Storage Temperature Total Power Dissipation Thermal Resistance Junction-Ambient ESD Capability(incl. HV Pin) 1) 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. Symbol VVCC Limit Values min. max. 20 130 V °C Max value limited due to thermal shut down of controller VVCCoff -25 Unit Remarks Parameter VCC Supply Voltage Junction Temperature of Controller TjCon Version 1.1 15 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. Symbol min. IVCCstart IVCCcharge1 IVCCcharge2 IStartLeak IVCCsup1 0.55 Limit Values typ. 160 1.05 0.88 0.2 5.5 6.5 300 300 max. 220 1.60 20 7.0 8.0 µA mA mA µA mA mA µA µA VSoftS = 4.4V IFB = 0, CLoad=1nF IFB = 0 ISofts = 0 IFB = 0 ISofts = 0 VVCC =15V VFB = 3.7V, VSoftS = 4.4V VVCC = 9.5V VFB = 3.7V, VSoftS = 4.4V VVCC =14V VVCC = 0V VVCC =14V VVCC =16V, VHV = 450V Unit Test Condition Parameter Start Up Current VCC Charge Current Leakage Current of Start Up Cell Supply Current with Inactive Gate Supply Current with Active Gate IVCCsup2 Supply Current in Latched Off Mode Supply Current in Auto Restart Mode with Inactive Gate Supply Current in Active Burst Mode with Inactive Gate VCC Turn-On Threshold VCC Turn-Off Threshold VCC Turn-On/Off Hysteresis IVCClatch IVCCrestart IVCCburst1 IVCCburst2 VVCCon VVCCoff VVCChys 14.2 8.0 - 1.05 0.95 15.0 8.5 6.5 1.25 1.15 15.8 9.0 - mA mA V V V 4.3.2 Parameter Internal Voltage Reference Symbol min. VREF 6.37 Limit Values typ. 6.50 max. 6.63 V measured at pin FB IFB = 0 Unit Test Condition Trimmed Reference Voltage Version 1.1 16 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4.3.3 Parameter Fixed Oscillator Frequency Max. Duty Cycle Min. Duty Cycle PWM-OP Gain Voltage Ramp Max Level VFB Operating Range Min Level VFB Operating Range Max level FB Pull-Up Resistor SoftS Pull-Up Resistor 1) PWM Section Symbol min. fOSC1 fOSC2 Dmax Dmin AV VMax-Ramp VFBmin VFBmax RFB RSoftS 61 63 0.67 0 3.5 0.3 16 39 Limit Values typ. 67 67 0.72 3.7 0.85 0.7 20 50 max. 73 71 0.77 3.9 4.75 27 62 V V V kΩ kΩ CS=1V, limited by Comparator C41) VFB < 0.3V kHz kHz Tj = 25°C Unit Test Condition The parameter is not subjected to production test - verified by design/characterization Control Unit Symbol min. VSoftSC2 VSoftSclmp VSoftSC3 ISoftSstart VFBC4 VFBC5 VFBC6a VFBC6b 3.85 4.23 5.20 4.62 1.23 3.85 3.25 Limit Values typ. 4.00 4.40 5.40 1.3 4.80 1.30 4.00 3.40 max. 4.15 4.57 5.60 4.98 1.37 4.15 3.55 V V V mA V V V V VFB > 5V VFB = 4V VFB > 5V VSoftS = 0V VSoftS > 5.6V VSoftS > 5.6V After Active Burst Mode is entered After Active Burst Mode is entered Unit Test Condition 4.3.4 Parameter Deactivation Level for SoftS Comparator C7 by C2 Clamped VSoftS Voltage during Normal Operating Mode Activation Limit of Comparator C3 SoftS Startup Current Over Load & Open Loop Detection Limit for Comparator C4 Active Burst Mode Level for Comparator C5 Active Burst Mode Level for Comparator C6a Active Burst Mode Level for Comparator C6b Version 1.1 17 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics Parameter Overvoltage Detection Limit Latched Thermal Shutdown1) Spike Blanking Power Down Reset for Latched Mode 1) Symbol min. VVCCOVP TjSD tSpike VVCCPD 20 130 4.0 Limit Values typ. 21 140 8.0 6.0 max. 22 150 7.5 Unit V °C µs V Test Condition VFB > 5V After Latched Off Mode is entered The parameter is not subjected to production test - verified by design/characterization The trend of all the voltage levels in the Control Unit is the same regarding the deviation except VVCCOVP and VVCCPD Current Limiting Symbol min. Vcsth 0.97 Limit Values typ. 1.02 max. 1.07 V dVsense / dt = 0.6V/µs (see Figure 12) Unit Test Condition Note: 4.3.5 Parameter Peak Current Limitation (incl. Propagation Delay Time of external MOS) Peak Current Limitation during Active Burst Mode Leading Edge Blanking CS Input Bias Current Over Current Detection for Latched Off Mode CS Spike Blanking for Comparator C11 VCS2 tLEB ICSbias VCS1 tCSspike 0.232 -1.0 1.570 - 0.257 220 -0.2 1.66 190 0.282 0 1.764 - V ns µA V ns VSoftS = 4.4V VCS =0V Version 1.1 18 28 Sep 2005 F3 ICE3BS02L Electrical Characteristics 4.3.6 Parameter GATE Low Voltage Driver Section Symbol min. VGATElow -0.2 GATE High Voltage VGATEhigh GATE Rise Time (incl. Gate Rising Slope) GATE Fall Time GATE Current, Peak, Rising Edge GATE Current, Peak, Falling Edge 1) 2) Limit Values typ. 0.8 1.6 0.2 11.5 10.5 7.5 150 55 max. 1.2 1.5 2.0 0.7 Unit V V V V V V V V ns ns A A Test Condition VVCC = 5 V IGate = 5 mA VVCC = 5 V IGate = 20 mA IGate = 0 A IGate = 20 mA IGate = -20 mA VVCC = 20V CL = 4.7nF VVCC = 11V CL = 4.7nF VVCC = VVCCoff + 0.2V CL = 4.7nF VGate = 2V ...9V1) CL = 4.7nF VGate = 9V ...2V1) CL = 4.7nF CL = 4.7nF2) CL = 4.7nF2) trise tfall IGATE IGATE -0.5 - Transient reference value 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. 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