GE Industrial Solutions QRW025 Series - Manual (Page 11)

Lineage Power 11
Data Sheet
August 23, 2010 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Characteristic Curves
The following figures provide typical characteristics curves for the QRW025A0Y (VO = 1.8 V) module at room temperature (TA
= 25 °C)
Figure 13. Input Voltage and Current Characteristics.
Figure 14. Converter Efficiency vs. Output Current.
Figure 15. Output Ripple Voltage (IO = IO, max).
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
Figure 16. Transient Response to Step Decrease in
Load from 50% to 25% of Full Load
(VI = 48 Vdc).
Figure 17. Transient Response to Step Increase in Load
from 50% to 75% of Full Load
(VI = 48 Vdc).
Tested with a 10µF aluminium and a 1.0µF tantalum capacitor across
the load.
Figure 18. Start-up from Remote On/Off (IO = IO, max).
25 30 35 40 45 50 55 60 65 70 75
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
I O = 25 A
I O = 12.5 A
I O = 0 A
INPUT VOLTAGE, V I (V)
INPUT CURRENT
, I
I
(A)
0 5 10 15 20 25
90
88
86
84
82
80
78
76
74
72
70
V I = 75 V
V I = 48 V
V I = 36 V
OUTPUT CURRENT, I O (A)
EFFICENCY
,
η
(%)
TIME, t (1 µs/div)
OUTPUT V
OL
TA
GE, V
O
(V)
(50 mV/div)
V I = 36 V
V I = 48 V
V I = 75 V
TIME, t (100 µs/div) OUTPUT CURRENT, I
O
(A)
(10 A/div)
OUTPUT VOLTAGE, V
O
(V)
(100 mV/div)
TIME, t (100 µs/div)
OUTPUT CURRENT
, I
O
(A)
(10 A/div)
OUTPUT V
OL
TA
GE, V
O
(V)
(100 mV/div)
TIME, t (2 ms/div)
REMO
TE ON/OFF
,
V
ON/OFF
(V)
OUTPUT V
OL
TA
GE,
(V)
(0.5 V/div)