Delta Electronics Series V48SR manual Electrical Characteristics Curves

ELECTRICAL CHARACTERISTICS CURVES

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 (LTEST) of 12 µH. Capacitor Cs offset possible battery impedance. Measure current as shown above

Figure 11: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (200 mA/div, 1us/div)

Copper Strip

Vo(+)

10u	1u	SCOPE	RESISTIV
			LOAD

Vo(-)

Figure 12: Input reflected ripple current, is, through a 12µH	Figure 13: Output voltage noise and ripple measurement test
source inductor at nominal input voltage and rated load current	setup
(20 mA/div, 1us/div)

Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=4.4A)(50 mV/div, 1us/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 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points

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