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Electrical characteristics curves – Delta Electronics E48SR12007 User Manual

Page 5

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E48SR12007_05222008


5

ELECTRICAL CHARACTERISTICS CURVES

Figure 8:

Output voltage response to step-change in load

current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (0.2V/div, 200us/div), Bottom Trace: Iout (1A/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

Figure

9:

Output voltage response to step-change in load

current (75%-50%-75%

of Io, max; di/dt = 2.5A/µs). Load cap:

47µF, 35m

Ω ESR solid electrolytic capacitor and 1µF ceramic

capacitor. Top Trace: Vout (0.2V/div, 200us/div), Bottom Trace:
Iout (1A/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



Figure 10:

Test set-up diagram showing measurement points

for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (L

TEST

) of 12 μH. Capacitor Cs offset

possible battery impedance. Measured current as shown below

Figure

11:

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)

0

0

0

0

0