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Reduce Standby Power To <10mW FAN302HL PSR/SSR Mixed PWM Controller. The Power Saving Challenge. Low Standby Power : Need a solution to comply to future energy efficiency regulations Source: Consortium of Mobile-Phone Makers.
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Reduce Standby Power To <10mW FAN302HL PSR/SSR Mixed PWM Controller
The Power Saving Challenge • Low Standby Power: Need a solution to comply to future energy efficiency regulations Source: Consortium of Mobile-Phone Makers 5 Star Level Score Chart from the Consortium of Mobile-Phone Makers calls for standby power < 30 mW for mobile charger Expect < 30 mW could soon extend to more applications and higher power More stringent standards are expected to come.
Smaller Form Factor Challenge • Design trend moving to even smaller form factors • Reducing even more components • Integration is necessary
Constantly drawing Power – Standby Power Loss • Today, between 6 and 10 billion power supplies plugged-in constantly draw power • Figures for most developed countries show 5% to 10% of power consumption going to standby power • Numbers illustrate the growing concern of energy waste and attention drawn to reducing standby power
Key Growth Area of AC-DC Power Supplies – Mobile Communication • Key growth area will be communications, driven by mobile phones • A 60% increase in just four years Source: Selantek Power Supply Report 2010
Market Trend for Smart Devices • If we take US market as an example : • Smartphone and feature phone shipments will meet the cross point in US market • Smartphone shipment will increase sharply in the coming years, but feature phone shipment will continuously drop • Among various PCs, the Tablet will have the highest growth rate • The growth trend for smart devices is spreading to the whole world Note: Percentages may not total 100% because of rounding Source: Forrester Research eReader Forecast, 2010 to 2015 (US) Source:Nielson (2010/11)
System Losses at No Load • Switching Loss • Conduction Loss
mWSaver™ Technology for Smart Devices • mWSaver™ technology is an optimized combination of process and circuit technologies that will be embedded in key power adapter components • All components with the mWSaver technology brand designation will feature the industry’s lowest standby/no-load power consumption per component • mWSaver Technology Solution for Smart Devices, FAN302HL: • PWM controller that achieves under 10 mW standby power. • Suitable for application from 5 W~15 W, the power range for Smart Devices (smart phones and tablet PCs).
Achieve Standby power <10 mW • New Primary Side CC Charger controller IC • Three dynamic partial shutdown strategies • Normal Mode: CC and CV heavy load • Green Mode: CV mid. and light load • Burst Mode:CV no load
Smaller Form Factor With Higher Switching Frequency • Higher frequency reduces transformer size • FAN302HL is a PWM controller with 85kHz switching frequency while the conventional ones are around 50kHz • The transformers used for 85kHz are only 32% of those used for 50kHz Used for 5 W/50kHz Dimensions: 16W x18D x 14H(mm) =4032mm2 Used for 5 W/85kHz Dimensions: 12W x 12D x 9H(mm) =1296mm2
Smaller Form Factor With VS OVP • Reduce PCB size by reducing external components with VS OVP • VS OVP for safer system and reduced part count External 2nd side OVP circuit : Photo coupler TL431 2x BJT Capacitors and resistors
Other Benefits from FAN302HL CV & CC • Good CV dynamic • CV±5% vs. CC ±10% • Ripple < 100mV • Meets Highest Efficiency Standards ± 5% ± 10% CC from PSR CV from SSR
mWSaver™ Technology – Provides the Best-in-Class Standby Power • FAN302HL provides <10mW standby power for applications 15W and below • mWSaver™ technology is being designed into a series of SMPS ICs that will be released throughout 2011. • By developing solutions like mWSaver technology and the FAN302HL, Fairchild enables engineers to drive innovation in their designs for maximum performance, simplified design and reduced bill of materials costs.
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