Q48SB10828NRFA Datasheet, PDF (4/11 Pages) Delta Electronics, Inc. – Delphi Series Q48SB, 300W Bus Converter DC/DC Power Modules: 48V in, 9.6V/31A out

ELECTRICAL CHARACTERISTIC CURVES
Figure 4: Turn-on transient at full rated load current (5 ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div
Figure 5: Turn-on transient at zero load current (2 ms/div). Top
Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 5V/div
Figure 6: 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), 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 7: 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), 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 8: 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_Q48SB10828_11062006
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