Electrical characteristics curves – Delta Electronics Q48DR User Manual
Page 7
DS_Q48DR1R533_03152007
8
ELECTRICAL CHARACTERISTICS CURVES
Figure 17: 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,
2us/div).
Figure 18: Input reflected ripple current-i
s
, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 2us/div).
Strip
Copper
Vo(-)
Vo(+)
10u
1u
SCOPE
RESISTIV
LOAD
Figure 19: Output voltage noise and ripple measurement
test setup
Figure 20: Output voltage ripple at nominal input voltage and
rated load current
(Iout1=Iout2=15A)(20 mV/div, 1us/div). Top
trace: Vout2(20mV/div), Bottom trace(20mV/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements 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.
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