Q48SB9R650NRFA Datasheet, PDF (5/12 Pages) Delta Electronics, Inc. – Delphi Series Q48SB, 500W Bus Converter DC/DC Power Modules: 48V in, 9.6V/55A out

ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (200mV/div, 200us/div), Bottom Trace: Iout (10A/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 (50%-75%-50% of Io,max; di/dt=1A/µs). Load cap:
10uF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (200mV/div, 200us/div), Bottom Trace: Iout (10A/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.
is
+
Cs: 220uF
ic
+
100uF,
ESR=0.2 ohm @
25^oC 100KHz
Vin+
Vin-
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. Measure 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 47µF electrolytic capacitor (1A/div, 2us/div).
DS_Q48SB9R650_07102006
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