MCM12S10Q Delta Electronics, Inc., MCM12S10Q Datasheet - Page 16

• Manufacturer Part Number: MCM12S10Q
• Description: Integrated, Non-isolated, Point Of Load, Dc/dc Power Modules
• Manufacturer: Delta Electronics, Inc.

DS_MCM12S10Q_07022008
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 vertical wind tunnels that simulate the thermal
environments
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The height of this fan duct is constantly kept
at 25.4mm (1’’).
Figure 44: Wind tunnel test setup
Heat can be removed by increasing airflow over the
module. 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 performance shown as below is based on the
test board with minimum copper traces area (worst
condition). The test board is 1oz / 4 layers.
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
MEASURED BELOW
following
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
FACING PWB
encountered
figure
AIR FLOW
shows
in
PWB
50.8 (2.0”)
MODULE
12.7 (0.5”)
25.4 (1.0”)
the
most
wind
electronics
tunnel
Figure 45: Temperature measurement location
Figure 46: Output current vs. ambient temperature and air
velocity @ Vin=5V, Vo=2.5V(Either Orientation)
Figure 47: Output current vs. ambient temperature and air
velocity @ Vin=9V, Vo=2.5V(Either Orientation)
The max. allowed temperature of hot spot is defined at 105
12
10
12
10
8
6
4
2
0
8
6
4
2
0
25
25
Output Current (A)
Output Current (A)
MCM12S10xx Output Current vs. Ambient Temperature and Air Velocity
MCM12S10xx Output Current vs. Ambient Temperature and Air Velocity
35
35
@ Vin =5V, Vout =2.5V (Either Orientation)
@ Vin =9V, Vout =2.5V (Either Orientation)
45
45
Convection
100LFM
200LFM
300LFM
Natural
55
55
Convection
100LFM
200LFM
300LFM
Natural
65
65
400LFM
500LFM
600LFM
500LFM
600LFM
400LFM
Ambient Temperature (℃)
Ambient Temperature (℃)
75
75
16
85
85
℃