GE Industrial Solutions QPW050-060 Series - Manual (Page 19)

Data Sheet
February 2, 2011
QPW050/060 Series Power Modules; DC-DC converters
36-75Vdc Input; 1.2Vdc to 3.3Vdc Output
LINEAGE POWER 19
The following figures provide thermal derating
characteristics.
O
U
TPUT C
URRENT,
I O
(A)
LOCAL AMBIENT TEMPERATURE, T
A
( C)
Figure 52. Output Power Derating for QPW050A0F
(Vo = 3.3V) in Transverse Orientation with baseplate
in natural convection environment; Airflow Direction
From Vin (–) to Vin (+); Vin = 48V
OUTPUT CURREN
T,
I O
(A)
LOCAL AMBIENT TEMPERATURE, T
A
( C)
Figure 53. Output Power Derating for QPW050A0F
(Vo = 3.3V) in Transverse Orientation with baseplate
in 200 LFM airflow environment; Airflow Direction
From Vin (–) to Vin (+); Vin = 48V
OU
TPUT C
URRENT,
I O
(A
)
LOCAL AMBIENT TEMPERATURE, T
A
( C)
Figure 54. Output Power Derating for QPW050A0F
(Vo = 3.3V) in Transverse Orientation with baseplate
in 400 LFM airflow environment; Airflow Direction
From Vin (–) to Vin (+); Vin = 48V
0
5
10
15
20
25
30
35
40
45
50
55
25 30 35 40 45 50 55 60 65 70 75 80 85
Open frame
Baseplate
Baseplate w/ 0.25" heat sink
Baseplate w/ 0.5" heat sink
0
5
10
15
20
25
30
35
40
45
50
55
25 30 35 40 45 50 55 60 65 70 75 80 85
Open frame
Baseplate
Baseplate w/ 0.25" heat sink
Baseplate w/ 0.5" heat sink
0
5
10
15
20
25
30
35
40
45
50
55
25 30 35 40 45 50 55 60 65 70 75 80 85
Open frame
Baseplate
Baseplate w/ 0.25" heat sink
Baseplate w/ 0.5" heat sink