Datasheet

YR20.242
Y-Series
12-28V, 20A, DUAL REDUNDANCY MODULE
18. APPLICATION NOTES
18.1. USING ONLY ONE INPUT INSTEAD OF BOTH CHANNELS
Using only one input instead of both is allowed up to a nominal input current of 24A (at max. +45°C ambient
temperature) or 20A (at max. +70°C ambient temperature).
However, it is always recommended to connect both input path in parallel for reduced power losses and voltage drop.
In cases when this is not possible, the following values can be expected:
Voltage drop, input to output typ. 80mV
at 1x10A, 25°C, see Fig. 18-1
typ. 150mV at 1x20A, 25°C, see Fig. 18-1
Power losses typ.
0.75W
at 1x10A, 25°C, see Fig. 18-3
typ.
3.0W
at 1x20A, 25°C, see Fig. 18-3
Standby power losses typ. 0.07W at 12V operation
typ. 0.14W at 24V operation
Fig. 18-1 Input to output voltage drop when only one
input is used
Fig. 18-2 Test setup for voltage drop measurements
Voltage Drop U 1 = U OUT -
V
A
Power
Supply
24V, 24A
+
-
I
1
U 1
Output
A
V
I OUT
U OUT
Variable
Load,
0-24A
YR20.242
Input 1
Input 2
Output
Voltage Drop, typ.
0mV
5A 15A
50mV
100mV
150mV
20A10A0
200mV
25A
Output Current
60°C
25°C
Fig. 18-3 Power losses when only one input is used Fig. 18-4 Test setup for power loss measurements
Power Losses, typ.
0
02.55 15
1.0
2.0
4.0
5.0
2012.57.5 10 17.5
3.0
25A22.5
Output Current
6W
60°C
25°C
Losses U 1 = U OUT -
*
I 1
*
I OUT
Output
V
A
I 1
U 1
A
V
I OUT
U OUT
YR20.242
Input 1
Input 2
Output
Variable
Load,
0-24A
Power
Supply
24V, 24A
+
-
Jul. 2017 / Rev. 1.3 DS-YR20.242-EN All parameters are typical values specified at 24V, 20A output current, 25°C ambient and
after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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