Rompower Confidential 1

Ionel Dan Jitaru

Rompower Energy Systems Inc.

ROMPOWER ENERGY

SYSTEMS

1

GANs as Synchronized Rectifiers

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GaNs as Synchronous

Rectifiers in AC-DC Adapters

The World Highest Efficiency 65W

Adapter

GANs as Synchronized Rectifiers

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GaNs Advantages as Synchronous Rectifiers

● 80% Reduction in driving power comparable with

similar rating silicon device

● Very Small Footprint

● 25% Reduction in Ron

GANs as Synchronized Rectifiers

● 5% less power dissipation by using GaNs

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KEY WAVEFORMS

GANs as Synchronized Rectifiers

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115Vac and 100% load

GANs as Synchronized Rectifiers

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115Vac and 100% load

GANs as Synchronized Rectifiers

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EFFICIENCY DATA

GANs as Synchronized Rectifiers

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Efficiency Versus Line

92.00%

92.50%

93.00%

93.50%

94.00%

94.50%

95.00%

85 105 125 145 165 185 205 225 245 265 285

Eff

icie

ncy

Input Voltage (VAC)

GANs as Synchronized Rectifiers

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Primary Switch

Clamp Switch

PCB/Primary

Transformer

SR

65W@90Vac Ambient 25C

GANs as Synchronized Rectifiers

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CONCLUSION

●Power Density above 20W/inc3

● Efficiency above 94% over the entire input voltage range

(90Vac-264Vac)

GANs as Synchronized Rectifiers

● 30% less power dissipation in comparison to other competing

technologies

● 5% less power dissipation by using GaNs

● 9.5% less power dissipation by using GaNs and GaNs for

the primary switch

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65W AC-DC Adapter

η>94% >20W/in3 0.921” x 1.45” x 2.39”

GANs as Synchronized Rectifiers