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# R-555.0PA-2005 View Datasheet(PDF) - RECOM Electronic GmbH

 Part Name Description Manufacturer R-555.0PA(2005) 2, 3, 4, 5 AMP SIP12 Vertical & Horizontal RECOM Electronic GmbH R-555.0PA Datasheet PDF : 6 Pages
 1 2 3 4 5 6 INNOLINE
DC/DC-Converter
Output Current vs Input Voltage
How to calculating the max output current
The internal power dissipation(PD)follows the equation:
PD = Io × Vo × (1-η)
Io = PD / Vo × (1-η)
Where PD = Internal power dissipation
Io = Output current
Vo = Output voltage
η = Efficiency
Example: R-545.0P , at Vin = 18Vdc , Vo = 5Vdc ,η=93% (see table 1)
(a) When Ta = 60°C , PD = 1.4 Watt (see fig-1)
Io = 1.4(W) / 5(V) × (1-0.93) = 4(A)
(b) When Ta = 85°C , PD = 1 Watt (see fig-1)
Io = 1(W) / 5(V) × (1-0.93) = 2.857(A)
(c) At Vin = 12Vdc efficiency = 94% (see table 1)
When Ta = 85°C , PD = 1 Watt (see fig-1)
Io = 1(W) / 5(V) × (1-0.94) =3.33(A)
R-5xxxPA_DA
Series
90
85
80
60
40
20
0
0.5
1
1.4
Internal Power Dissipation (W)
Characteristics
R-53xx / R-54xx
Output Voltage Line Regulation VS Vout
1
0.5
0
1.2 1.8 2.3 3.3 5.0
Output Voltage (V)
R-52xx / R-55xx
Output Voltage Line Regulation VS Vout
1
0.5
0
1.2 1.8 2.3 3.3 5.0
Output Voltage (V)
R-53xx / R-54xx
Intput Voltage Load Regulation VS Vin
2.0
1.5
1.0
0.5
0
5
10
15
Input Voltage (V)
1.2V
1.8V
2.5V
3.3V
5.0V
20
R-52xx / R-55xx
Intput Voltage Load Regulation VS Vin
2.0
1.5
1.0
0.5
0
5
10
15
Input Voltage (V)
1.2V
1.8V
2.5V
3.3V
5.0V
20
www.recom-international.com
24-August-2005
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