Fairchild FEBFAN7688SJXA_CP14U306, User Manual

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© 2015 Fairchild Semiconductor Corporation 23 FEBFAN7688SJXA_CP14U306
• Rev. 1.1
9.2. AC Trim Up & Trim Down
Test Condition:
Switch the input voltage from 90 V to 264 V or from 264 V to 90 V. The output voltages
should be normal and the output of PFC bus should be less than 450 V.
Test Results:
90 V

264 V 264 V

90 V
50% Load 50% Load
Pass Pass
Ch1: 12Vo , Ch2: Iin , Ch3: VAC , Ch4: Vbulk
90 V

264 V 264 V

90 V
Figure 18. Test Waveform of AC Trim Up & Trim Down
9.3. Efficiency
Test Condition:
Measure input current Power Factor (PF) and Total Harmonic Distortion (THD, Class D)
at various line and output loading.
Test Results:
Input
Watts
(W)
Output Watts (W)
12V
FAN
Efficiency Standard
12V1 12V2 12Vsb
When V
IN
= 115 V,
at 100% Load
344.00 152.31 152.28 6.00 ON 90.28% > 89%
When V
IN
= 115 V,
at 50% Load
167.30 76.37 76.39 3.01 OFF 93.10% > 92%
When V
IN
= 115 V,
at 20% Load
69.00 30.63 30.67 1.21 OFF 90.59% > 90%
When V
IN
= 230 V,
at 100% Load
336.80 152.31 152.31 6.00 ON 92.22% > 91%
When V
IN
= 230 V,
at 50% Load
165.30 76.37 76.39 3.01 OFF 94.23% > 94%
When V
IN
= 230 V,
at 20% Load
68.50 30.63 30.66 1.21 OFF 91.24% > 90%