ELECTRICAL
CHARACTERISTICS CURVES
Figure 5:
Output voltage response to step-change in load
current (75-50% Iomax; di/dt = 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 6:
Output voltage response to step-change in load current
(50-75% Iomax; di/dt = 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
0
Figure 7:
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 8:
Input Terminal Ripple Current, i
c
, at 6A output current
and nominal input voltage with 12µH source impedance and 33µF
electrolytic capacitor (100 mA/div, 2us/div)
E48SR12006_03022007
4
DELTA [ DELTA ELECTRONICS, INC. ]
