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Power Integrations New CAPZero-3 X-Capacitor Discharge ICs Meet IEC60335

New device family from ICs from Power Integrations reduces standby power for appliance applications

Power Integrations CAPZero-3Power Integrations announces CAPZero-3, the latest generation of the company’s elegant, energy-saving X-capacitor discharge ICs.

Two-terminal CAPZero-3 ICs enable designers to easily meet IEC60335 safety approvals for major appliances, and cover all capacitor values from 100 nF to 6 µF.

IEC60335 is the discharge safety standard for all appliances.

To protect the user from an electrical hazard, it requires:

  • The voltage across the input X capacitor to discharge to less than 34 V within less than one second after the AC is removed.
  • CAPZero-3 ICs block current flow through the X-capacitor discharge resistors when the AC voltage is connected, and automatically discharge X capacitors through those resistors when the AC is disconnected.
  • CAPZero-3 ICs simplify EMI filter designs while permitting the use of larger X capacitors, which in turn enables smaller inductive components to be used with no resulting change in power consumption.
  • CAPZero-3 ICs can be placed before or after a system’s input fuse.
  • Devices deliver high common-mode surge immunity so that no external ground connection is necessary.
  • Features a high differential surge withstand due to 1000 V internal MOSFETs. Creepage on the package and PCB is maintained at >4 mm.

Comments Edward Ong, product manager, Power Integrations, “With the launch of the new CAPZero-3 ICs, designers can use one part to address a large range of applications in small and major appliances that require X capacitor values from 100 nF to 6 µF.”

CAPZero-3 devices are safety-certified to CB and Nemko requirements and so developers do not need to perform a separate safety test on the X-capacitor discharge circuit of the power supply. Devices are available now, priced at $0.31 in 1,000 piece quantities. Technical support is available from the Power Integrations website at: www.power.com/products/capzero-3.

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Niloy Banerjee

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