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CAPZero data sheet - .PDF file.

Power Integrations has announced that its CAPZero range of two-terminal, automatic X-capacitor discharge ICs has been certified to meet IEC 62368, the new overarching safety standard covering televisions and IT equipment.

The CAPZero range is designed to eliminate power losses while allowing power supplies to comply with safety standards. The new standard replaces IEC 60950 and IEC 60065 and will become mandatory.

CAPZero ICs are smart, high-voltage switches that are placed in series with the resistors used to provide a safe discharge path for a power supply’s X capacitor.

Without this switching mechanism, the discharge resistors cause a constant power drain while AC is connected and therefore contribute significantly to no-load and standby input power consumption.

CAPZero X-capacitor discharge ICs block 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 automatically and safely discharges the X capacitor by closing the circuit and directing the energy away from the exposed AC plug.

Click on the link above to download the data sheet for the CAPZero range.

Key benefits

  • Edward Ong, product marketing manager at Power Integrations, said: ‘Once the new standards reach a mandatory phase, mains-voltage electrical equipment must carry the IEC 62368 certification. CAPZero ICs are certified to the new standard and deliver a simple, cost-effective solution to eliminate discharge resistor loss while requiring minimal modification to system or PCB layout. This approach gives engineers total flexibility in their choice of the X capacitor used, optimising differential-mode EMI filtering and providing a cost-effective option for designers optimising no-load consumption, power factor and EMI, as well as meeting the most up-to-date safety regulations.’
  • CAPZero ICs can be used before or after the system input fuse, as the X-capacitor discharge ICs inherently meet international safety standards for all open- and short-circuit fault tests.
  • Devices are suitable for all AC-DC converters with X capacitors and are available with 825V or 1,000V MOSFETs to support a variety of power supply design needs. Applications include PCs, servers/workstations, monitors and TVs, printers and notebooks, appliances requiring ErP Lot 6 compliance and adapters requiring ultra-low no-load consumption.

Power Integrations

Power Integrations is the leading supplier of high-voltage integrated circuits used in energy-efficient power conversion. The company’s innovative technology enables compact, energy-efficient power supplies in a wide range of electronic products, in AC-DC, DC-DC and LED lighting applications. Since its introduction in 1998, Power Integrations’ EcoSmartä energy-efficiency technology has saved an estimated $4.5 billion of standby energy waste and prevented millions of tons of CO2 emissions. The company’s Green Room web site provides a wealth of information about “energy vampires” and the issue of standby energy waste, along with a comprehensive guide to energy-efficiency standards around the world. Reflecting the environmental benefits of EcoSmart technology, Power Integrations is included in clean-technology stock indices sponsored by the Cleantech Group (Amex: CTIUS) and Clean Edge (Nasdaq: CELS).

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