S48SA1R510PRFB データシートの表示（PDF） - Delta Electronics, Inc.

部品番号

コンポーネント説明

メーカー

S48SA1R510PRFB

Delphi Series S48SA, 33W Family DC/DC Power Modules: 48V in, 1.2V/12A out

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 Testing Setup

Delta’s DC/DC power modules are characterized in

heated vertical wind tunnels that simulate the thermal

environments encountered in most electronics

equipment. This type of equipment commonly uses

vertically mounted circuit cards in cabinet racks in which

the power modules are mounted.

The following figure shows the wind tunnel

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 or a heat sink is

6.35mm (0.25”).

Thermal Derating

Heat can be removed by increasing airflow over the

module. Figure 19 shows maximum output is a function

of ambient temperature and airflow rate. 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.

FACING PWB

PWB

MODULE

THERMAL CURVES

Figure 18: Hot spot temperature measured point

＊The allowed maximum hot spot temperature is defined at 102℃

S48SA1R212(Standard) Output Current vs. Ambient Temperature and Air Velocity

Output Current(A)

14

@ Vin = 48V (Either Orienation)

12

600LFM

10

Natural

Convection

8

100LFM

6

200LFM

4

2

300LFM

500LFM

400LFM

0

65

70

75

80

85

90

95

100

105

Ambient Temperature (℃)

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

AIR FLOW

50.8 (2.0”)

Figure 19: Output current vs. ambient temperature and air velocity

@ Vin=48V

10 (0.4”)

Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)

Figure 17: Wind tunnel test setup

9

DS_S48SA1R212_05122006

Share Link: