LinkZero Family

LinkZero-LP is a zero no-load consumption, integrated offline switcher IC for 3 W chargers and adapters that automatically detects output conditions and enters zero input power mode when the load is disconnected. When the load is reconnected, LinkZero-LP automatically restarts regulation. LinkZero-LP achieves this remarkable performance without the use of a mechanical switch or additional circuitry – indeed fewer than 20 external components are required – resulting in a very simple retrofit to ensure that an existing product consumes 0.00 W in no-Load . Moreover, the 100 kHz operating frequency minimizes charger size, and frequency jittering greatly reduces the cost of EMI filtering.

The LinkZero-AX product family of integrated offline switching ICs enables designers to achieve 0.00 watts of standby energy consumption in auxiliary power supplies. The devices feature an innovative power-down mode that effectively turns off the auxiliary power supply when the end product is idle. Power-down mode is triggered by a signal accessible to a microcontroller, completely shutting down switch-mode operation and internal switch control circuits, eliminating energy wasted by these unnecessary functions. However, while in power-down mode, the LinkZero-AX stays alive, allowing the IC to be awakened with a reset pulse or button press. The bypass pin on the LinkZero-AX IC can also provide up to 500 μA of current for use by any system control or sensing circuit.

LinkZero-AX provides designers with flexibility to build ultra-low standby power supplies without mechanical AC mains switches. When used in tandem with Power Integrations' CAPZero™ X capacitor discharge IC and SENZero™ sense resistor disconnect device, LinkZero-AX reduces standby power waste in high-power consumer products and appliances to as low as 4 mW, or effectively zero. (IEC 62301 Clause 4.5 classifies power usage of less than 5 mW as zero.)