Delta Electronics Q48SR - Manual (Page 6)

6
ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Input Terminal Ripple Current, i
c
, at full rated
output current and nominal input voltage with 12µH source
impedance and 33µF electrolytic capacitor (500 mA/div).
Figure 14: Input reflected ripple current, i
s
, through a 12µH
source inductor at nominal input voltage and rated load current
(5 mA/div).
Vo(-)
Vo(+)
10u 1u
Copper Strip
SCOPE RESISTIVE
LOAD
Figure 15: Output voltage noise and ripple measurement
test setup
Figure 16: Output voltage ripple at nominal input voltage and
rated load current (20 mV/div). Load capacitance: 1µF ceramic
capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz.
Scope measurement should be made using a BNC cable (length
shorter than 20 inches). Position the load between 51 mm to 76
mm (2 inches to 3 inches) from the module.