Datasheet

YR20.246
Y-Series
24-28V, 20A, DUAL REDUNDANCY MODULE
21. APPLICATION NOTES
21.1. USING ONLY ONE INPUT INSTEAD OF BOTH CHANNELS
Using only one input instead of both is allowed up to a nominal input current of 12A (at max. +45°C ambient
temperature) or 10A (at max. +70°C ambient temperature).
The load share feature is disabled in cases one input voltage is not present or the level of the input voltage is below a
certain value. The MOSFET will be on in such cases.
However, it is always recommended to connect both input path in parallel for reduced power losses and voltage drop.
When this is not possible, the following values can be expected:
Voltage drop, input to output typ. 0.15V
at 1x10A, 25°C, see Fig. 21-1
Power losses typ.
2.6W
at 1x10A, 25°C, see Fig. 21-3
Standby power losses typ. 1.1W
Fig. 21-1 Input to output voltage drop when only one
input is used
Fig. 21-2 Test setup for voltage drop measurements
Voltage Drop, typ.
0mV
2.5A 7.5A
50mV
100mV
150mV
10A5A0
200mV
12.5A
Input/ Output Current
25°C
60°C
Voltage Drop U 1 = U OUT -
V
A
Power
Supply
24V, 12A
+
-
I
1
U 1
Output
A
V
I OUT
U OUT
Variable
Load,
0-12A
YR20.246
Input 1
Input 2
Output
Fig. 21-3 Power losses when only one input is used Fig. 21-4 Test setup for power loss measurements
Power Losses, typ
0
2.5A 7.5A
1W
2W
3W
10A5A0
4W
12.5A
Output Current
25°C
60°C
Losses U 1 = U OUT -
*
I 1
*
I OUT
Output
V
A
I 1
U 1
A
V
I OUT
U OUT
YR20.246
Input 1
Input 2
Output
Variable
Load,
0-12A
Power
Supply
24V, 12A
+
-
Jul. 2017 / Rev. 1.4 DS-YR20.246-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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