Texas Instruments UCC28060EVM Power Supply User Manual


 
6TypicalPerformanceData
Efficiency
90.0%
91.0%
92.0%
93.0%
94.0%
95.0%
96.0%
97.0%
98.0%
99.0%
100.0%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
%Output Power
Efficiency (%)
Efficency at Vin 85V RMS
Efficency at Vin = 265V RMS
Efficiency at Vin = 115V RMS
91.0%
92.0%
93.0%
94.0%
95.0%
96.0%
97.0%
98.0%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
%Output Power
Efficiency (%)
With Phase Management
Without Phase Management
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TypicalPerformanceData
Figure4throughFigure7presentcharacteristicperformancedatafortheUCC28060EVM.
Figure4.Efficiencyat85V
RMS
and265V
RMS
TheUCC28060controldevicehasphasemanagementcapabilitytoimprovelightloadefficiency.To
demonstratethelightloadefficiency,theunitefficiencywasmeasuredwithphasemanagementenabled
anddisabledat115V
RMS
and230V
RMS
inputvoltages.Phasemanagementimprovedthelightload
efficiencyupto3%.RefertotheUCC28060datasheetfordetailsonhowtousethephasemanagement
functionofthisdevice.
Figure5.Efficiencyat115V
RMS
,WithandWithoutPhaseManagement
SLUU280BMay2007RevisedJuly2008UCC28060EVM300-WInterleavedPFCPre-Regulator5
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