d12s400 Delta Electronics, Inc., d12s400 Datasheet - Page 9

• Manufacturer Part Number: d12s400
• Description: Delphi D12s400 Non-isolated Point Of Load Dc/dc Modules 5~13.2vin, 0.8375~5.0v/ 80a Output
• Manufacturer: Delta Electronics, Inc.

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 De-rating
Heat can be removed by increasing airflow over the
module. The module’s maximum hot spot temperature is
defined at 125 ℃ . 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.
THERMAL CURVES
Figure 28: Hot spot temperature measured point
※ The allowed maximum hot spot temperature is defined at
DS_D12S400_10032008
125
℃
.
THERMAL CURVES
Figure 29: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=1.0V (Worst Orientation)
Figure 30: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=1.2V (Worst Orientation)
Figure 31: Output current vs. ambient temperature and air
velocity@ Vin=12V, Vout=1.5V (Worst Orientation)
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
25
25
25
Output Current (A)
Output Current (A)
Output Current (A)
Convection
Convection
Convection
100LFM
200LFM
300LFM
300LFM
300LFM
100LFM
200LFM
100LFM
200LFM
Natural
Natural
Natural
D12S400 series Output Current vs. Ambient Temperature and Air Velocity
D12S400 series Output Current vs. Ambient Temperature and Air Velocity
D12S400 series Output Current vs. Ambient Temperature and Air Velocity
35
35
35
@ Vin =12V, Vout =1.2V (Worse Orientation)
@ Vin =12V, Vout =1.5V (Worse Orientation)
@ Vin =12V, Vout =1V (Worse Orientation)
45
45
45
500LFM
500LFM
600LFM
500LFM
600LFM
400LFM
600LFM
400LFM
400LFM
55
55
55
65
65
65
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
75
75
75
85
85
85
9