CAP018DG

™ CAPZero Family Zero1 Loss Automatic X Capacitor Discharge IC Product Highlights • • • • • • • • Blocks current through X capacitor discharge resistors when AC voltage is connected Automatically discharges X capacitors through discharge resistors when AC is disconnected Simplifies EMI filter design – larger X capacitor allows smaller inductive components with no change in consumption Only two terminals – meets safety standards for use before or after system input fuse >4 mm creepage on package and PCB Self supplied – no external bias required High common mode surge immunity – no external ground connection High differential surge withstand – 1000 V internal MOSFETs R1 D1 MOV and Other EMI Filter Components AC X Capacitor CAPZero D2 R2 PI-6599-110711 EcoSmart ® – Energy Efficient • 100 nF • Appliances requiring EuP Lot 6 compliance • Adapters requiring ultra low no-load consumption • All converters requiring very low standby power Figure 1. Typical Application – Not a Simplified Circuit. Component Selection Table Product3 CAP002DG CAP012DG CAP003DG CAP013DG CAP004DG CAP014DG CAP005DG CAP015DG CAP006DG CAP016DG CAP007DG CAP017DG CAP008DG CAP018DG CAP009DG CAP019DG BVDSS 825 V 1000 V 825 V 1000 V 825 V 1000 V 825 V 1000 V 825 V 1000 V 825 V 1000 V 825 V 1000 V 825 V 1000 V Maximum Total X Capacitance ≤ 500 nF 750 nF 1 mF 1.5 mF 2 mF 2.5 mF 3.5 mF 5 mF Total Series Resistance2 (R1 + R2) 1.5 MW 1.02 MW 780 kW 480 kW 360 kW 300 kW 200 kW 150 kW Description When AC voltage is applied, CAPZero blocks current flow in the X capacitor safety discharge resistors, reducing the power loss to less than 5 mW, or essentially zero1 at 230 VAC. When AC voltage is disconnected, CAPZero automatically discharges the X capacitor by connecting the series discharge resistors. This operation allows total flexibility in the choice of the X capacitor to optimize differential mode EMI filtering and reduce inductor costs, with no change in power consumption. Designing with CAPZero is simply a matter of selecting the appropriate CAPZero device and external resistor values in Table 1 for the X capacitor value being used. This design choice will provide a worst case RC time constant, when the AC supply is disconnected, of less than 1 second as required by international safety standards. The simplicity and ruggedness of the two terminal CAPZero IC makes it an ideal choice in systems designed to meet EuP Lot 6 requirements. The CAPZero family has two voltage grades: 825 V and 1000 V. The voltage rating required depends on surge requirement and circuit configuration of the application. See Key Applications Considerations section for details. Table 1. Component Selection Table. Notes: 1. IEC 62301 clause 4.5 rounds standby power use below 5 mW to zero. 2. Values are nominal. RC time constant is 1.5 kV it is recommended that the MOV is always placed in the location shown in Figure 3 as MOVPOS1. It is always recommended that the peak voltage between terminals D1 and D2 of CAPZero is measured during surge tests in the final system. Measurements of peak voltage across CAPZero during surge tests should be made with oscilloscope probes having appropriate voltage rating and using an isolated supply to the oscilloscope to avoid ground currents influencing measurement results. When making such measurements, it is recommended that 50 V engineering margin is allowed below the breakdown voltage specification (for example 950 V with the 1000 V CAPZero). If the measured peak Drain voltage exceeds 950 V, an external 1 kV ceramic capacitor of value up to 47 pF can also be placed between D1 and D2 terminals to attenuate the voltage applied between the CAPZero terminals during surge. This optional external capacitor placement is shown as CEXT in Figure 3. It should be noted that use of an external capacitor in this way will increase power consumption slightly due to the CEXT charge/ discharge currents flowing in R1 and R2 while AC is connected. A CEXT value of 33 pF will add approximately 0.5 mW at 230 VAC, 50 Hz. PCB Layout and External Resistor Selection Figure 4 shows a typical PCB layout configuration for CAPZero. The external resistors in this case are divided into two separate surface mount resistors to distribute loss under fault conditions – for example where a short-circuit exists between CAPZero terminals D1 and D2. R1 and R2 values are selected according to Table 1. Under a fault condition where CAPZero terminals D1 and D2 are shorted together, each resistor will dissipate a power that can be calculated from the applied AC voltage and the R1 and R2 values. For example in an application using CAP004 or CAP014, R1=R2=390 kW. If CAPZero is shorted out at 265 VAC R1 and R2 will each dissipate 45 mW. Resistors R1 and R2 should also be rated for 50% of the system input voltage again to allow for the short-circuitry of CAPZero D1 to D2 pins during single point fault testing. If lower dissipation or lower voltage across each resistor is required during fault tests, the total external resistance can be divided into more discrete resistors, however the total resistance must be equal to that specified in Table 1. 3 www.powerint.com Rev. D 11/11 CAPZero Family Safety CAPZero meets safety requirements even if placed before the system input fuse. If a short-circuit is placed between D1 and D2 terminals of CAPZero, the system is identical to existing systems where CAPZero is not used. X Capacitor R1 With regard to open circuit tests, it is not possible to create a fault condition through a single pin fault (for example lifted pin test) since there are two pins connected to each of D1 and D2. If several pins are lifted to create an open circuit, the condition is identical to an open circuit X capacitor discharge resistor in existing systems where CAPZero is not used. If redundancy against open circuit faults is required, two CAPZero and R1 / R2 configurations can be placed in parallel. Discharge Operation To meet the safety regulations, when the AC supply is disconnected, CAPZero will discharge the X capacitor to the safety extra low voltage (SELV) levels according to the above functional description. Although there are no specific safety requirements below SELV, CAPZero still continues the discharge until the X capacitor is fully discharged. As such CAPZero can be safely used at low input voltages such as the common industrial 18 VAC and 24 VAC supply rails while retaining X capacitor discharge when the AC source is disconnected. R2 ≥4 mm PI-5610-041310 Figure 4. Typical PCB Layout. 4 Rev. D 11/11 www.powerint.com CAPZero Family Absolute Maximum Ratings4 CAP002-CAP009 ..............................825 V CAP012-CAP019 .............................1000 V DRAIN Peak Current2 CAP002/CAP012 .................... 0.553 mA CAP003/CAP013 .....................0.784 mA CAP004/CAP014 ..................... 1.026 mA CAP005/CAP015 ..................... 1.667 mA CAP006/CAP016 .................... 2.222 mA CAP007/CAP017 ......................2.667 mA CAP008/CAP018 .................... 4.000 mA CAP009/CAP019 .................... 5.333 mA Storage Temperature ...................................... -65 °C to 150 °C Lead Temperature3 .......................................................... 260 °C Operating Ambient Temperature ...................... -10 °C to 105 °C Maximum Junction Temperature ...................... -10 °C to 110 °C DRAIN Pin Voltage1 Notes: 1. Voltage of D1 pin relative to D2 pin in either polarity. 2. The peak DRAIN current is allowed while the DRAIN voltage is simultaneously less than 400 V. 3. 1/16 in. from case for 5 seconds. 4. The Absolute Maximum Ratings specified may be applied one at a time without causing permanent damage to the product. Exposure to Absolute Maximum Rating conditions for extended periods of time may affect product reliability. Parameter Control Functions AC Removal Detection Time Symbol Conditions TA = -10 to 105 °C (Unless Otherwise Specified) Min Typ Max Units tDETECT Line Cycle Frequency 47-63 Hz CAP002/012 CAP003/013 CAP004/014 0.25 0.37 0.48 0.78 1.04 1.25 1.88 2.5 22 31.4 ms Drain Saturation CurrentA,B IDSAT CAP005/015 CAP006/016 CAP007/017 CAP008/018 CAP009/019 mA Supply Current ISUPPLY TA = 25 °C 21.7 mA Notes A. Saturation current specifications ensure a natural RC discharge characteristic at all voltages up to 265 VAC pk with the external resistor values specified in Component Selection Table 1. B. Specifications are guaranteed by characterization and design. 5 www.powerint.com Rev. D 11/11 CAPZero Family Typical Performance Characteristics 1.20 1.10 1.00 ISUPPLY (Normalized to 25 °C) 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 -25 0 25 50 75 100 125 Temperature (°C) Figure 5. ISUPPLY vs. Temperature. 6 Rev. D 11/11 www.powerint.com PI-6020-062110 CAPZero Family SO-8 (D Package) 4 B 2 4.90 (0.193) BSC A 8 4 5 GAUGE PLANE o 0.10 (0.004) C A-B 2X DETAIL A D 2 3.90 (0.154) BSC 6.00 (0.236) BSC SEATING PLANE C 1.04 (0.041) REF 0-8 0.10 (0.004) C D 2X Pin 1 ID 1.27 (0.050) BSC 1 4 0.20 (0.008) C 2X 7X 0.31 - 0.51 (0.012 - 0.020) 0.25 (0.010) M C A-B D 1.25 - 1.65 (0.049 - 0.065) 0.10 (0.004) C 7X SEATING PLANE C H 0.25 (0.010) BSC 0.40 (0.016) 1.27 (0.050) 1.35 (0.053) 1.75 (0.069) 0.10 (0.004) 0.25 (0.010) DETAIL A 0.17 (0.007) 0.25 (0.010) Reference Solder Pad Dimensions + Notes: 1. JEDEC reference: MS-012. 2. Package outline exclusive of mold flash and metal burr. 3. Package outline inclusive of plating thickness. 4. Datums A and B to be determined at datum plane H. 5. Controlling dimensions are in millimeters. Inch dimensions are shown in parenthesis. Angles in degrees. PI-5615-041210 1.45 (0.057) 4.00 (0.157) 5.45 (0.215) + + + 0.60 (0.024) D08A 1.27 (0.050) Part Ordering Information • CAPZero Product Family • 002 Series Number • Package Identifier D G Blank CAP 002 D G - TL TL Plastic SO-8 GREEN: Halogen Free and RoHS Compliant Standard Configurations Tape & Reel, 2.5 k pcs. • Package Material • Tape & Reel and Other Options 7 www.powerint.com Rev. D 11/11 Revision A B C C D Notes Code A release. Updated ISUPPLY condition. Added figure 5. Parameter TDETECT was updated. Updated Table 1. Updated Note 1 in Table 1. Added “Discharge Operation” paragraph. Updated Absolute Maximum Ratings Table. Added Maximum Junction Temperature specification. Updated Figures 1 and 3. Date 04/14/10 06/08/10 02/11 04/11 11/07/11 For the latest updates, visit our website: www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. Patent Information The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm. Life Support Policy POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS. As used herein: 1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii) whose failure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in significant injury or death to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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