D12S400-A Datasheet, PDF (9/12 Pages) Delta Electronics, Inc. – Delphi D12S400 Non-Isolated Point of Load DC/DC Modules

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
(VERTICAL VERSION)
Figure 28: Hot spot temperature measured point
※ The allowed maximum hot spot temperature is defined at
125℃.
THERMAL CURVES
(VERTICAL VERSION)
D12S400 series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1V (Worse Orientation)
Output Current (A)
90
80
70
60
Natural
Convection
50
100LFM
40
400LFM
30
200LFM
500LFM
20
300LFM
10
600LFM
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 29: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=1.0V (Worst Orientation)
D12S400 series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1.2V (Worse Orientation)
Output Current (A)
90
80
70
60
Natural
Convection
50
100LFM
40
400LFM
30
200LFM
500LFM
20
300LFM
10
600LFM
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 30: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=1.2V (Worst Orientation)
D12S400 series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1.5V (Worse Orientation)
Output Current (A)
90
80
70
60
50
Natural
Convection
40
100LFM
30
20
200LFM
400LFM
500LFM
10
300LFM
600LFM
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 31: Output current vs. ambient temperature and air
velocity@ Vin=12V, Vout=1.5V (Worst Orientation)
DS_D12S400_10152013
9