Q36SR12019NRFA Datasheet, PDF (5/14 Pages) Delta Electronics, Inc. – Delphi Series Q36SR, Quarter Brick 228W DC/DC Power Modules: 18V~75Vin,12V, 19Aout

ELECTRICAL CHARACTERISTICS CURVES
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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 (LTEST) of 12 µH. Capacitor Cs offset
possible battery impedance. Measure current as shown above
Figure 9: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage (Vin=48V) with 12µH source
impedance and 33µF electrolytic capacitor (1A/div, 5us/div)
Vo(+)
Copper Strip
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10u
1u
SCOPE RESISTIVE
LOAD
Vo(-)
Figure 10: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage (Vin=48V) and rated
load current (20 mA/div, 5us/div)
Figure 11: Output voltage noise and ripple measurement test
setup
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Figure 12: Output voltage ripple at nominal input voltage
(Vin=48V) and rated load current (50 mV/div, 2us/div).Load
capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements 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 13: Output voltage vs. load current showing typical
current limit curves and converter shutdown points (Vin=48V)
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Q36SR12019_08092012