CAP300DG CAPZero-3 1 Zero Loss Automatic X Capacitor Rapid Discharge IC Product Highlights Meets IEC 60335 X capacitor discharge of <34 V in <1 sec R1 One part to cover X capacitor values up to 6 mF Blocks current through X capacitor discharge resistors when AC D1 voltage is connected Automatically discharges X capacitors through discharge resistors MOV and Other when AC is disconnected AC X Capacitor EMI Filter Simplifies EMI filter design larger X capacitor allows smaller Components inductive components with no change in consumption Only two terminals meets safety standards for use before or after D2 system input fuse CAP300DG >4 mm creepage on package and PCB R2 Self supplied no external bias required PI-7507a-030819 High common mode surge immunity no external ground connection High differential surge withstand 1000 V internal MOSFETs Figure 1. Typical Application Not a Simplified Circuit. NEMKO and CB certification EcoSmart Energy Efficient <5 mW consumption at 230 VAC for all X capacitor values Component Table Applications All AC-DC converters with X capacitors of 100 nF up to 6 mF Total Series Total 3 2 Product BV Resistance Appliances requiring ErP Lot 6 compliance DSS X Capacitance (R1 + R2) Adapters requiring ultra low no-load consumption All converters requiring very low standby power CAP300DG 1000 V 200 nF to 6 mF 54 kW Minimum Lossless generation of zero crossing signal Table 1. Component Table. Description Notes: 1. IEC 62301 clause 4.5 rounds standby power use below 5 mW to zero. When AC voltage is applied, CAP300DG blocks current flow in the 2. Values are nominal. RC time constant is <1 second. X capacitor safety discharge resistors, reducing the power loss to less 3. Packages: D: SO-8. 1 than 5 mW, or essentially zero at 230 VAC. When AC voltage is disconnected, CAP300DG 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 CAP300DG is simply a matter of selecting the appropri- ate external resistor values for the X capacitor value being used to achieve the necessary time constant. The simplicity and ruggedness of the two terminal CAP300DG IC makes it an ideal choice in systems designed to meet ErP Lot 6 requirements. Figure 2. SO-8 D Package. www.power.com February 2020 This Product is Covered by Patents and/or Pending Patent Applications.CAP300DG Although electrical connections are only made to pins 2, 3, 6 and 7, it Pin Functional Description is recommended that pins 1-4 and pins 5-8 are coupled together on The pin configuration of Figure 3 ensures that the width of the SO-8 the PCB see Applications Section. package is used to provide creepage and clearance distance of over 4 mm. Key Application Considerations Breakdown Voltage Selection The system configuration variables include the placement of the system MOV and X capacitor(s) as well as the differential surge D Package (SO-8) voltage specifications of the application. As shown in Table 1, the CAP300DG has a breakdown voltage of 1 8 NC NC 1000 V. For applications where the system MOV is placed in position 2 7 1 (MOV in Figure 4), the CAP300DG will provide adequate voltage D1 D2 POS1 withstand for surge requirements of 3 kV or higher. 3 6 D1 D2 For MOV placement that is not directly across the X Capacitor1 (for 4 5 NC NC example MOV in Figure 4) the CAP300DG devices can be used up to POS2 a surge specification of 1.5 kV. For differential surge voltage specifica - tions of >1.5 kV it is recommended that the MOV is always placed in the location shown in Figure 4 as MOV . POS1 PI-5608-020515 Figure 3. Pin Configuration. R1 D1 MOV MOV POS1 POS2 Other EMI AC Filter Components X Capacitor1 X Capacitor2 D2 CAP300DG R2 PI-7508a-082019 Figure 4. Placement Options of MOV. 2 Rev. C 02/20 www.power.com