Texas Instruments UCC28060EVM - Manual (Page 5)

6 Typical Performance Data
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 Pow er
E
ff
ic
ie
n
c
y
(%
)
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
E
ff
ic
ie
n
c
y
(%
)
With Phase Managem ent
Without Phase Managem ent
www.ti.com Typical Performance Data
Figure 4 through Figure 7 present characteristic performance data for the UCC28060EVM.
Figure 4. Efficiency at 85V
RMS
and 265V
RMS
The UCC28060 control device has phase management capability to improve light load efficiency. To
demonstrate the light load efficiency, the unit efficiency was measured with phase management enabled
and disabled at 115 V
RMS
and 230 V
RMS
input voltages. Phase management improved the light load
efficiency up to 3%. Refer to the UCC28060 data sheet for details on how to use the phase management
function of this device.
Figure 5. Efficiency at 115 V
RMS
, With and Without Phase Management
SLUU280B – May 2007 – Revised July 2008 UCC28060EVM 300-W Interleaved PFC Pre-Regulator 5
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