QPW025A0F641-H Lineage Power, QPW025A0F641-H Datasheet - Page 10

• Manufacturer Part Number: QPW025A0F641-H
• Description: DC/DC Converters & Regulators 36-75Vin 3.3Vout 25A NegTH auto-restrt BP
• Manufacturer: Lineage Power

Specifications of QPW025A0F641-H

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: CC109155280

Data Sheet
October 5, 2009
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.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Thermal derating curves
showing the maximum output current that can be
delivered by the module versus local ambient
temperature (T
ft./min) and 1.0 m/s (200 ft./min) are shown in Fig. 15 for
the bare module and in Fig. 16 for the module with
baseplate.
Note that the natural convection condition was
measured at 0.05m/s to 0.1m/s (10ft./min. to 20ft./min.);
however, systems in which these power modules may
be used typically generate natural convection airflow
rates of 0.3m/s (60 ft./min.) due to other heat dissipating
components in the system.
Figure 15. Thermal Derating Curves for the
QPW025A0F41 module at 48Vin. Airflow is in the
transverse direction (Vin− to Vin+).
Figure 16. Thermal Derating Curves for the
QPW025A0F41-H baseplate module at 48Vin. Airflow
is in the transverse direction (Vin− to Vin+).
LINEAGE
30
25
20
15
10
30
25
20
15
10
5
0
5
0
20
20
POWER
A
30
30
) for natural convection, 0.5m/s (100
40
40
TEMPERATURE (
TEMPERATURE (
50
50
NC
60
60
36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current
O
O
(100 lfm) 1.0 m/s
C)
C)
0.5 m/s
NC
70
70
QPW025A0F41/QPW025A0F41-H DC-DC Power Module
(100 lfm)
0.5 m/s
(200 lfm)
80
80
90
90
10