Dual Output Off-Line Non-isolated Flyback Power Solution
AP3917B 12V/20mA+3.8V20mA EV3 Board User
’s Guide
AP3917B EV3 Page 9 of 17 06-21-2019
Rev 1.0 www.diodes.com
5.1.4 Load Regulation
The load regulation data was tested after 10min burning. The voltage data was tested at the PCB terminal. All the data was
tested at room temperature.
The load of Vo1 and Vo2 terminals both ranges from 10% to 100%.
Table 5-4, Vo1 and Vo2 output voltage
Vin
10%
25%
50%
75%
100%
Vo1(V)
Vo2(V)
Vo1(V)
Vo2(V)
Vo1(V)
Vo2(V)
Vo1(V)
Vo2(V)
Vo1(V)
Vo2(V)
85V/60Hz
3.788
11.578
3.785
11.772
3.788
11.937
3.772
12.057
3.768
12.157
115V/60Hz
3.788
11.585
3.784
3.777
3.774
11.932
3.772
12.052
3.766
12.157
230V/50Hz
3.786
11.572
3.781
11.757
3.774
11.922
3.769
12.047
3.764
12.147
265V/50Hz
3.785
11.572
3.780
11.755
3.774
11.922
3.768
12.045
3.763
12.147
Fig. 5-4, 12V and 5V output voltage@ 3.8V no load
5.2 Key Performance test
5.2.1 Start up performance
The start-up time was measured with differential probe clipping on the input AC source, and the common low-voltage probe
clipping on the output terminal. Before start-up, the buck cap should be discharged.
Table 5-5, start up performance
Input voltage
Start up time
figures
85V/60Hz
16.8ms
Fig. 15
115V/50Hz
16.1ms
Fig. 16
230V/50Hz
15.3ms
Fig. 17
264V/60Hz
14.6ms
Fig. 18
0
1
2
3
4
5
6
7
8
9
10
11
12
13
80 100 120 140 160 180 200 220 240 260 280
O
u
tp
u
t
V
o
lt
age(
V
)
Vin(V)
Load Regulation
Vo1-85V/60Hz
Vo1-115V/60Hz
Vo1-230V/50Hz
Vo1-265V/50Hz
Vo2-85V/60Hz
Vo2-115V/50Hz
Vo2-230V/50Hz
Vo2-265V/50Hz