CAPZero
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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 MOV and Other EMI Filter Components EcoSmart ® – Energy Efficient • <5 mW consumption at 230 VAC for all X capacitor values Applications • All ACDC converters with X capacitors >100 nF • Appliances requiring EuP Lot 6 compliance • Adapters requiring ultra low no-load consumption • All converters requiring very low standby power Typical Application – Not a Simplified Circuit. Component Selection Table Product3 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. Maximum Total X Capacitance 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 second with ±20% X capacitor and ±5% resistance from these nominal values. 3. Packages: D: SO-8.

CAPZero Family Pin Functional Description The pin configuration of Figure 2 ensures that the width of the SO-8 package is used to provide creepage and clearance distance of over 4 mm. Although electrical connections are only made to pins 2, 3, 6 and 7, it is recommended that pins 1-4 and pins 5-8 are coupled together on the PCB – see Applications Section.

CAPZero Family Other EMI Filter Components Placement Options of MOV and CEXT. Key Application Considerations Breakdown Voltage Selection Figure 3 illustrates possible system configurations influencing the choice of CAPZero breakdown voltage. The system configuration variables include the placement of the system MOV and X capacitor(s) as well as the differential surge voltage specifications of the application. As shown in Table 1, each device in the CAPZero family has a 825 V or 1000 V option. For applications where the system MOV is placed in position 1 (MOVPOS1 in Figure 3), the 825 V...

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 Figure 4. Typical PCB Layout. 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...

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. Conditions TA = -10 to 105 °C (Unless Otherwise Specified) Line Cycle Frequency 47-63 Hz Control Functions AC Removal Detection Time Supply Current CAP004/014 Drain...

CAPZero Family Typical Performance Characteristics

CAPZero Family GAUGE PLANE SEATING PLANE 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. Part Ordering Information • CAPZero Product Family • 002 Series Number • Package Identifier D GREEN: Halogen Free and RoHS Compliant • Tape & Reel and Other Options Blank CAP 002 Standard Configurations

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. 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...