Q48DW3R312NRFA Datasheet, PDF (6/14 Pages) Delta Electronics, Inc. – Delphi Series Q48DW, 45W Quarter Brick, Dual Output DC/DC Power Modules: 1.2V/13A and 3.3V/8A

ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Output voltage response to step-change in load
current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
Iout1=0. Load cap: 470µF, 35mΩ ESR solid electrolytic
capacitor and 1µF ceramic capacitor. Ch1=Vout2 (50mV/div),
Ch2=Iout2 (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.
Figure 14: Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
Iout2=0A, Load cap: 470µF, 35mΩ ESR solid electrolytic
capacitor and 1µF ceramic capacitor. Ch1=Vout1 (50mV/div),
Ch2=Iout1 (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.
Figure 15: 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, 35mΩ ESR solid electrolytic
capacitor and 1µF ceramic capacitor. Ch1=Vout1 (50mV/div),
Ch2=Iout1 (10A/div), Ch3=Vout2 (100mV/div), Ch4=Iout2
(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 16: 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 above.
DS_Q48DW3R312_07202006
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