Datasheet

NCP1351
http://onsemi.com
22
Another benefit of the variable frequency lies in the low
ripple operation at no-load. This is what confirms
Figure 29.
Finally, the power supply was tested for its transient
response, from 100 mA to 3 A, high and low line, with a
slew-rate of 1 A/s (Figure 31). Results appear in
Figures 31 and 32 and confirm the stability of the board.
Figure 29. No-Load Output Ripple
(V
in
= 230 Vac)
Figure 30. Same Conditions,
P
out
= 5 W
V
ds
200 V/div
V
out
1.0 mV/div
V
ds
200 V/div
V
out
1.0 mV/div
Figure 31. Transient Step, Low Line Figure 32. Transient Step, High Line
V
out
50 mV/div
V
out
50 mV/div