14
TDK-Lambda
PFE300SA
･
500SA Series
INSTRUCTION MANUAL
7. Mounting Method
7-1. Mounting Method
These products can be used in any orientation but be sure to consider enough airflow to avoid heat
accumulation around the power supply. Consider surrounding components layout and set the PCB mounting
direction such that air can flow through the heat sink by forced or convection cooling.
Refer to the power module application note "Power module mounting method" for mounting method on PWB.
This product can operate at actual mounting condition when base-plate temperature and ambient temperature
are maintained at or below the following temperature.
PFE300SA-12,28,48 : 100
℃
PFE500SA-12
: 85
℃
PFE500SA-28,48
: 100
℃
Temperature at worst case operating condition at the measuring point shown in Fig. 7-1 and Fig. 7-2.
For Thermal Design details, refer to Application Notes “Thermal Design” section.
Fig.7-1 Base-plate Temperature Measuring Point
Fig.7-2 Ambient Temperature Measuring Point
7-2. Output Derating
Operating temperature range is limited according to Fig. 7-3.
Fig.7-3 Derating Curve
To further improve the reliability, it is recommended to use this power supply with base-plate and ambient
temperature derating.
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
ベースプレート温度 および 周囲温度
(
℃
)
負
荷
電
流
(
％
)
PFE500SA-12
PFE300SA-12, 28, 48
85
PFE500SA-28, 48
0
-40
-20
0
20
40
60
80
100
Baseplate and Ambient temperature (
℃
)
85
L
oa
d
(
％
)
