Technical Reference Notes
ALD12/18/20/25 Series
(Single Output 16
th
Brick)
MODEL: ALD12/ 18/20/ 25 SERIES SHEET 11 OF 20
AUGUST 17, 2005 – REVISION C
Performance Curves
2.5V Version
Effic i ency vs. Output Current, T
A
=25°C
55%
60%
65%
70%
75%
80%
85%
90%
95%
0 4 8 12 16 20
Output C urrent (Amps)
Efficienc
Vin = 36Vdc
Vin = 48Vdc
Vin = 75Vdc
Figure 18. 2.5V Efficiency vs. output current at various
input line conditions, T
A
= 25°C.
P ower Dissipation vs. Output Current, T
A
=25°C
0
2
4
6
8
10
0 5 10 15 20
Outpu t Current (Amps)
Power Di ssi p atio n (Wa tts
Vin = 36 Vdc
Vin = 48 Vdc
Vin = 75 Vdc
Figure 19. 2.5V Power Dissipation vs. load current at
various input line conditi ons, T
A
= 25°C.
Figure 20. 2.5V Startup Characteristic at V
IN
= 36Vdc,
I
O
= Full Load, T
A
= 25°C, C
O
= 0.
Figure 21. 2.5V Output Ripple at V
IN
= 48Vdc, I
O
=
Full Load, T
A
= 25°C.
