No-Load, Ultra-Low Standby and Remote-Off Mode

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

The graph above shows input power vs. output power as load increases for different PI product families.

Power Integrations ICs minimize power dissipation in each power supply stage, not just
inside the IC:

• EMI control techniques mean that large X capacitors can be avoided
  • Greatly reduces the size of and need for bleed resistors
• Low current for monitoring and control reduces the power drawn by IC control functions
• Transformer designs are optimized for maximum efficiency using PI's popular design software, PI Expert^®
• Multiple switching modes automatically selected to optimize efficiency under all load conditions
• On-Off Control and Multi-Cycle-Modulation are employed at light load to minimize switching losses by only skipping switching cycles when energy transfer is not required to maintain regulation
• PI's unique lateral MOSFET structure has much lower switching loss (C_OSS) than conventional MOSFET structures, greatly reducing wasted energy during switching cycles

Typical Product Application	Design Ideas	Design Example Reports
3 W power supply with less than 10 mW no-load
3.25 W Low cost constant current/constant voltage charger
15 W power supply with less than 20 mW no-load
27 W Low Profile, Low Standby Consumption Power Supply
65 W power supply with less than 100 mW no-load

Product Families Used in These Applications

IC Product Family	Typical Circuit Configuration	Data Sheets	Application Notes
LinkSwitch-II	Flyback
LinkSwitch-XT	Flyback
TinySwitch-III	Flyback
TinySwitch-PK	Flyback
TOPSwitch-HX	Flyback

3 W Battery Charger

Input power consumption for a practical 3 W power supply using LNK363DN	3 W battery charger schematic using LinkSwitch-XT

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

For information on these designs and to receive detailed design reports, please contact your local PI representative or refer to the design example reports and product families listed above.