Delta Electronics Q48SR manual Typical input characteristics at room temperature

ELECTRICAL CHARACTERISTICS CURVES

(%)	95
	93
EFFICIENCY
	91
	89
	87
	85
	83
	81
	79
	77		36Vin	48Vin	75Vin
	75
	0.8	1.0	1.2	1.4	1.6	1.8

OUTPUT VOLTAGE (V)

(W)	15.0		36Vin	48Vin		75Vin
DISSIPATION	14.0
	13.0
	12.0
POWER
	11.0
	10.0
	9.0
	8.0
	7.0
	6.0
	5.0
	0.8	1.0	1.2	1.4	1.6	1.8

OUTPUT VOLTAGE (V)

Figure 5: Efficiency vs. output voltage for minimum, nominal, and maximum input voltage at 25°C. (Iout=40A)

Figure 6: Power dissipation vs. output voltage for minimum, nominal, and maximum input voltage at 25°C. (Iout=40A)

(A)	3.0
INPUT CURREN	2.5			Io=40A			Io=24A		Io=4A
	2.0
	1.5
	1.0
	0.5
	0.0
	30	35	40	45	50	55	60	65	70	75

INPUT VOLTAGE (V)

Figure 7: Typical input characteristics at room temperature	Figure 8: Turn-on transient at full rated load current (resistive
	load) (5 ms/div). Top Trace: Vout; 1V/div; Bottom Trace:
	ON/OFF input: 2V/div

4