Power Integrations’ next generation CapZero™ two-terminal, X-capacitor discharge IC increases design flexibility by covering 0.1 µF to 6 µF and handling up to 6 kV transient line voltages. By using CAPZero-2, power supply designers only need to qualify a single part number for all their X-capacitor discharge IC applications.
The CAPZero-2 X-capacitor discharge IC eliminates a key source of power losses while allowing power supplies to comply with IEC 62368-1, the new over-arching safety standard covering TVs and IT equipment. Placed in series with resistors that provide a safe discharge path for a power supply’s X-capacitor, the CAPZero-2 device blocks current flow to the discharge resistors when AC voltage is applied, cutting the power wasted in these components to zero. When the AC voltage is disconnected, CAPZero-2 switches on automatically and safely discharges the X-capacitor by closing the circuit and directing the energy away from the exposed AC plug.
