Delta Electronics Series Q48DR Datasheet page 5

ELECTRICAL CHARACTERISTICS CURVES
ELECTRICAL CHARACTERISTICS CURVES
Ch1
Ch2
Ch3
Ch4
Figure 9: Output voltage response to step-change in load
F igure 9: Typical full load input characteristics at room
current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
te mperature
Iout1=7.5A. Load cap: 470µF, 35m
capacitor and
(100mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div),
Ch4=Iout1 (7.5A/div) 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.
Ch1
Ch1
Ch2
Ch2
Ch3
Ch3
Ch4
Ch4
Figure 11: Output voltage response to step-change in load
current Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt =
2.5A/µs). Load cap: 470µF, 35m
F igure 11: Output voltage response to step-change in load
capacitor and
c urrent Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
(100mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div),
Io ut2=7.5A. Load cap: 10µF, tantalum capacitor and 1µF
Ch4=Iout1 (7.5A/div) Scope measurement should be made
c eramic capacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2
using a BNC cable (length shorter than 20 inches). Position
( 7.5A/div), Ch3=Vout1 (100mV/div), Ch4=Iout1 (7.5A/div)
the load between 51 mm to 76 mm (2 inches to 3 inches)
S cope measurement should be made using a BNC cable
from the module.
(l ength shorter tha n 20 inches). Position the load between
51 mm to 76 mm (2 inches to 3 inches) from the module.
DS_Q48DR1R833_03162007
Ω
ESR solid electrolytic
1µF ceramic capacitor.
Ω
ESR solid electrolytic
1µF ceramic capacitor.
Ch1
Ch1
Ch2
Ch2
Ch3
Ch3
Ch4
Ch4
Figure 10: Output voltage response to step-change in load
F igure 10: Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
cu rrent Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
Iout2=7.5A. Load cap: 470µF, 35m
I o ut1=7.5A. Load cap: 10µF, tantalum capacitor and 1µF ceramic
Ch1=Vout2 capacitor and 1µF ceramic capacitor. Ch1=Vout2 (100mV/div),
ca pacitor. Ch1=Vout2
Ch2=Iout2 (7.5A/div),
C h3=Vout1
(7.5A/div) Scope measurement should be made using a BNC
m easurement should be made using a BNC cable (length shorter
cable (length shorter than 20 inches). Position the load between
th an 20 inches). Position the load between 51 mm to 76
51 mm to 76 mm (2 inches to 3 inches) from the module.
inches to 3 inches) from the module.
Ch1
Ch2
Ch3
Ch4
Figure 12: Test set-up diagram showing measurement points for
Input Terminal Ripple Current and Input Reflected Ripple
Current.
F igure 12 : Output voltage response to step-change in load
Note: Measured input reflected-ripple current with a simulated
Ch1=Vout2
c u rrent Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt =
source Inductance (L
0. 1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic
battery impedance. Measure current as shown above
ca pacitor. Ch1=Vout2
Ch3=Vout1
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.
6
Ω
ESR solid electrolytic
(100mV/div), Ch2=Iout2
Ch3=Vout1 (100mV/div),
(100mV/div), Ch4=Iout1
) of 12 µH. Capacitor Cs offset possible
TEST
(100mV/div), Ch2=Iout2
(100mV/div), Ch4=Iout1
(7.5A/div),
Ch4=Iout1
(7.5A/div) Scope
mm (2
( 7.5A/div),
(7.5A/div) Scope
5