The CAP019DG is a X Capacitor Discharge IC, when AC voltage is applied, device blocks current flow in the X capacitor safety discharge resistors, reducing the power loss to less than 5mW or essentially zero1 at 23VAC. 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, 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.
● Blocks current through X capacitor discharge resistors when AC voltage is connected
● Automatically discharges X capacitors through discharge resistors when AC is disconnected
● Only two terminals - meets safety standards for use before or after system input fuse
● >4mm creepage on package and PCB
● Self supplied - no external bias required
● High common mode surge immunity - No external ground connection
● High differential surge withstand - 1000V internal MOSFETs
● 1000V Voltage grades
