Data Sheet
QPW050/060 Series Power Modules; DC-DC converters
36-75Vdc Input; 1.2Vdc to 3.3Vdc Output
March 27, 2008
The following figures provide thermal derating characteristics.
60
60
50
40
30
20
10
0
50
40
30
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
NATURAL
CONVECTION
20
1.0 m/s (200 ft./min.)
10
2.0 m/s (400 ft./min.)
2.0 m/s (400 ft./min.)
0
25 30 35 40 45 50 55 60 65 70 75 80 85
25 30 35 40 45 50 55 60 65 70 75 80 85
LOCAL AMBIENT TEMPERATURE, TA (°C)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 47. Output Power Derating for QPW060A0M (Vo Figure 50. Output Power Derating for QPW060A0P (Vo
= 1.5V) in Longitudinal Orientation with no baseplate;
Airflow Direction From Vin(–) to Vout(--); Vin = 48V.
= 1.2V) in Transverse Orientation with no baseplate;
Airflow Direction From Vin(–) to Vin(+); Vin = 48V.
60
50
40
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion
of thermal aspects including maximum device
temperatures.
30
NATURAL CONVECTION
20
1.0 m/s (200 ft./min.)
10
2.0 m/s (400 ft./min.)
0
25 30 35 40 45 50 55 60 65 70 75 80 85
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 48. Output Power Derating for QPW060A0M (Vo
= 1.5V) in Transverse Orientation with no baseplate;
Airflow Direction From Vin(–) to Vin(+); Vin = 48V.
60
50
40
30
NATURAL CONVECTION
20
1.0 m/s (200 ft./min.)
10
2.0 m/s (400 ft./min.)
0
25 30 35 40 45 50 55 60 65 70 75 80 85
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 49. Output Power Derating for QPW060A0P (Vo
= 1.2V) in Longitudinal Orientation with no baseplate;
Airflow Direction From Vin(–) to Vout(--); Vin = 48V.
LINEAGE POWER
18
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
