D12S72C Datasheet, PDF (7/12 Pages) Delta Electronics, Inc. – Non-Isolated, Power Block DC/DC Power Modules: 7.0~13.2Vin, 0.8V~1.8V/40Aout

THERMAL CONSIDERATIONS
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated wind tunnels that simulate the thermal
environments encountered in most electronics
equipment.
The following figures show the wind tunnel
characterization setup. The power module is mounted
on Primarion test board and is horizontally positioned
within the wind tunnel.
Airflow
TOP VIEW
Airflow
SIDE VIEW
Figure 20: Wind Tunnel Test Setup
FRONT VIEW
Thermal De-rating
The module’s maximum hot spot temperature is
+113°C. To enhance system reliability, the power
module should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit may
be affected.
Figure 21: Temperature measurement location
The allowed maximum hot spot temperature is defined at 113
THERMAL CURVES
Output Current(A)
40
D12S72 C Output Current vs. Ambient Temperature and Air Velocity
@Vin = 7V, Vo=1.8V (Either Orientation)
35
Natural
Convection
30
100LFM
25
20
15
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature ( )
Figure 22: Output current vs. ambient temperature and air
velocity@ Vin=7V, Vout=1.8V (Either Orientation)
Output Current(A)
40
D12S72 C Output Current vs. Ambient Temperature and Air Velocity
@Vin = 11V, Vo=1.8V (Either Orientation)
35
Natural
Convection
30
100LFM
25
20
15
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature ( )
Figure 23: Output current vs. ambient temperature and air
velocity@ Vin=11V, Vout=1.8V (Either Orientation)
Output Current(A)
40
D12S72 C Output Current vs. Ambient Temperature and Air Velocity
@Vin =13.2V, Vo=1.8V (Either Orientation)
35
Natural
Convection
30
100LFM
25
20
15
10
5
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature ( )
Figure 24: Output current vs. ambient temperature and air
velocity@ Vin=13.2V, Vout=1.8V (Either Orientation)
7