FAN9611 Fairchild Semiconductor, FAN9611 Datasheet - Page 33

• Manufacturer Part Number: FAN9611
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN9611 / FAN9612 • Rev. 1.1.4
Evaluation Board
FEB388: 400W Evaluation Board Using FAN9611/12
FEB388 is an evaluation board for an interleaved dual
boundary-conduction-mode PFC converter rated at
400W (400V/1A) power. With phase management, the
efficiency is maintained above 96% even down at 10%
of the rated output power. The efficiencies for full-load
condition exceed 96% as shown below.
100
FIGURE 63.
95
90
85
0
Figure 65. Measured Efficiency at 115V
V
V
IN
10
DD
Nominal: 85V~264V
Input Voltage
Supply: 13V~18V
20
(115 V
FAN9612 Efficiency vs. Load
(Adjusted Thresholds)
AC
30
(Default Thresholds)
Measured Efficiency at 115V
Input, 400 V
40
Output Power (%)
50
DC
DC
Output, 400W)
AC
With Phase Management
Without Phase Management
60
70
80
Rated Output Power
90
AC
AC
100
400W
33
Figure 63 and Figure 64 show the phase management
with the default minimum threshold values of the IC.
They can be adjusted upwards to achieve a different
efficiency profile (Figure 65 and Figure 66) where phase
management thresholds are adjusted to 30% / 44% of
the full load. For full specification, design schematic, bill
of materials and test results; see
400W Evaluation Board User Guide
100
FIGURE 64.
95
90
85
0
Figure 66. Measured Efficiency at 230V
10
20
(230 V
FAN9612 Efficiency vs. Load
Output Voltage (Rated Current)
(Adjusted Thresholds)
AC
30
(Default Thresholds)
Input, 400 V
Measured Efficiency at 230V
40
Output Power (%)
50
DC
Output, 400W)
400V (1A)
With Phase Management
Without Phase Management
60
FEB388 — FAN9611/12
(AN-9717).
70
80
www.fairchildsemi.com
90
AC
100
AC