R-723.3P_07 Datasheet, PDF (3/5 Pages) Recom International Power – 2, 3, 4 AMP SIP12 Vertical & Horizontal

INNOLINE
DC/DC-Converter
Output Current vs Input Voltage
How to calculate 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-745.0P , at Vin = 28Vdc , Vo = 5Vdc ,η=91% (see "Selection Guide" table)
(a) When Ta = 60°C , PD = 1.4 Watt (see beside diagram)
Io = 1.4(W) / 5(V) × (1-0.91) = 3.11(A)
(b) When Ta = 85°C , PD = 1 Watt (see beside diagram)
Io = 1(W) / 5(V) × (1-0.91) = 2.222(A)
(c) At Vin = 12Vdc efficiency = 94% (see "Selection Guide" table)
When Ta = 85°C , PD = 1 Watt (see beside diagram)
Io = 1(W) / 5(V) × (1-0.94) =3.33(A)
R-7xxxP_D
Series
90
85
80
60
40
20
0
0.5
1
1.4
Internal Power Dissipation (W)
Characteristics
R-72xx / R-73xx
Ripple VS Vin
50
25
Vo=15V
Vo=12V
Vo=6.5V
Vo=9V
Vo=5V
Vo=3.3V
( Vo )
5
10 15 20 25 28
Vin ( V )
Ripple Vs Vin
R-74xx
Ripple VS Vin
100
6.5V
50
5V
3.3V
( Vo )
5
10 15 20 25 28
Vin ( V )
Ripple Vs Vin
R-72xx / R-73xx
Efficiency VS Vin
100
15V
6.5V
5V
3.3V
50
( Vo )
5
10 15 20 25 28
Vin ( V )
Efficiency Vs Vin
R-74xx
Efficiency VS Vin
R-72xx / R-73xx / R-74xx
Efficiency / Load Vin=Min
100
Vo=6.5V
Vo=5V
Vo=3.3V
50
( Vo )
5
10 15 20 25 28
Vin ( V )
Efficiency Vs Vin
100
6.5V
5.0V
3.3V
90
80
( Vo )
70
1
2
3
4
Efficiency Vs Iout (Vin=Min)
R-72xx / R-73xx / R-74xx
Efficiency / Load Vin=Max
100
15V
90
5.0V
3.3V
80
60
( Vo )
1
2
3
4
Efficiency Vs Iout (Vin=Max)
www.recom-international.com
27-March-2007
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