Delta Electronics Q48DC manual Electrical Characteristics Curves Electrical Characteristics Curves

ELECTRICAL CHARACTERISTICS CURVES ELECTRICAL CHARACTERISTICS CURVES

EFFICIENCY (%) 1

90

87

84

81

78	48Vin	75Vin
75

7236Vin

60

0.3 0.7 1.1 1.5 1.9 2.3 2.7

OUTPUT CURRENT(A)

POWER DISSIPATION(W)1

10.2

9.4

8.6

7.8

7.0

6.2

5.4

36Vin

4.648Vin

3.875Vin

3.0

0.3 0.7 1.1 1.5 1.9 2.3 2.7

OUTPUT CURRENT(A)

Figure 1:8:EfficiencyOutput voltagevs. loadresponsecurrent fortominimum,step-changenominal,loadand maximumcurrent Iout1input(75%voltage-50%at-75%25°C.ofIo1=Io2Io, max;. di/dt = 0.1A/µs, 200uS/DIV)). Vin=48V. Load cap: 10µF, tantalum capacitor

and 1µF ceramic capacitor. Top trace: Vout (100mV/div),
	2.5
Bottom trace: Iout (1A/div). Scope measurement should be
	2.3
made using a BNC cable (length short than 20 inch). Position
the load between 51 mm and 76 mm (2inch and 3 inch) from
	2.1
the module.
(A)1	1.9
CURRENT	1.7
	1.5
INPUT	1.3
	1.1
	0.9

0.7

0.5

25 30 35 40 45 50 55 60 65 70 75

INPUT VOLTAGE (V)

Figure 2: Power dissipation vs. load current for minimum, Figure 9: Output voltage response to step-change load nominal, and maximum input voltage at 25°C. Io1=Io2. current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs,

200uS/DIV). Vin=48V. Load cap: 10µF, tantalum capacitor and

1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom

trace: Iout (1A/div). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from the module.

Figure 3: Typical input characteristics at room temperature (Io=full load).

DS_Q48DC12003_03112008 5