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Ultra-low Standby/No-load Power Solutions

Power Integrations makes it easy to meet the standby power requirements of Ecodesign Directive (ErP), ENERGY STAR, and other emerging energy-efficiency standards.

Of specific interest to standyby and no-load power supply designers are the ways in which PI products help meet standards requirements for EC Ecodesign Lots 6 (Standby and Off-mode) and 7 (External Power Supplies). For more information, see:


Power Integrations ICs deliver extremely low standby/no-load power with energy saving features

The graph below shows input power vs. output power as load increases for different PI product families. (For greater detail, click on the image.)

graph 1



The following shows the application of CAPZero, SENZero, and LinkZero-AX to achieve ultra-low, no-load power of <10 mW.




Power Consumption at No-Load

1.5 W Zero No-Load Flyback Power Supply

No-load Input Power in PD mode vs. Input Line Voltage,
25 ºC, 50 Hz. 30 Minute Dwell Time at 230 VAC Prior to Taking Measurements.

Circuit schematic 1.5 W non-isolated flyback power Supply using LinkZero™-AX


15 W PC Standby

Careful transformer design reduced power consumption of this 15 W solution from 29 mW no-load to less than 20 mW

15 W power supply using TinySwitch-III;
less than 20 mW input at 230 Vrms no-load

30 W PC Standby

Zero Load Input Power vs. Input Line Voltage, Room Temperature, 60 Hz.

High Efficiency 12 V, 30 W Standby Power Supply Using TOPSwitch®-JX TOP265EG


Reference Designs

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