NC12S0A0V50PNFA DELTA [Delta Electronics, Inc.], NC12S0A0V50PNFA Datasheet - Page 10

• Manufacturer Part Number: NC12S0A0V50PNFA
• Description: Delphi ND Series Non-Isolated Point of Load DC/DC Power Modules: 12Vin, 0.9V~3.63Vout, 50Aout
• Manufacturer: DELTA [Delta Electronics, Inc.]

THERMAL CONSIDERATION
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 space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
Thermal Derating
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.
Note: Wind tunnel test setup figure dimensions are in
millimeters and (Inches)
Figure 31: Wind tunnel test setup
MEASURED BELOW
DS_ND12S10A_03082007
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
following
FACING PWB
encountered
figure
AIR FLOW
shows
PWB
50.8 (2.0”)
in
MODULE
22 (0.87”)
11 (0.43”)
the
most
wind
electronics
tunnel
THERMAL CUREVES
Figure 32: Temperature measurement location* The allowed
maximum hot spot temperature is defined at 124
Figure 33: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=0.9V(Through PCB Orientation)
Figure 34: Output current vs. ambient temperature and air
velocity@ Vin=12V, Vout=2.5V(Through PCB Orientation)
55
50
45
40
35
30
25
20
15
10
55
50
45
40
35
30
25
20
15
10
5
0
5
0
Output Current (A)
Output Current (A)
25
25
30
30
ND12S0A0V50(standard) Output Current vs. Ambient Temperature and Air Velocity
ND12S0A0V50(standard) Output Current vs. Ambient Temperature and Air Velocity
Convection
Natural
35
35
40
40
Convection
@Vin=12V Vout=0.9V (Through PCB Orientation)
@Vin=12V Vout=2.5V (Through PCB Orientation)
Natural
100LFM
45
45
50
50
100LFM
200LFM
55
55
`
60
60
300LFM
200LFM
65
65
70
70
℃
Ambient Temperature (℃)
Ambient Temperature (℃)
75
75
80
80
85
85
10