FPDK12SR8004PSS FDK CORPORATION, FPDK12SR8004PSS Datasheet - Page 9

• Manufacturer Part Number: FPDK12SR8004PSS
• Description: 5.6-14.0vdc Input, 4a, 0.8-6.6vdc Output
• Manufacturer: FDK CORPORATION

FPDK12SR8004PSS
5.6-14.0Vdc Input, 4A, 0.8-6.6Vdc Output
The thermal test board comprised a four layer printed
circuit board (PCB) with a total thickness of 0.060”.
Copper metallization on the two outer layers was
limited to pads and traces needed for soldering the
converter and peripheral components to the board.
The two inner layers comprised power and ground
planes of 2 oz. copper. This thermal test board, with
the paucity of copper on the outer surfaces, limits
heat transfer from the converter to the PCB, thereby
providing a worst-case but consistent set of
conditions for thermal measurements.
温度評価ﾎﾞｰﾄﾞは厚さ0.060”(1.6mm)厚の4層PCBで作成しています。表
面2層の銅箔はｺﾝﾊﾞｰﾀを実装するためのﾊﾟｯﾄﾞと周辺部品へのﾊﾟﾀｰﾝの
みに限定しています。内側2層は70μmの銅箔で電力、及びｸﾞﾗﾝﾄﾞﾗｲﾝ
を形成しています。このように表層の銅箔を限りなく少なくした温度評価
ﾎﾞｰﾄﾞは、ｺﾝﾊﾞｰﾀからPCBへの熱の逃げを制限し、ﾜｰｽﾄｹｰｽでありな
がら矛盾の無い温度評価条件を実現しています。
FDK’s custom wind tunnel was used to provide
precise horizontal laminar airflow in the range of 50
LFM to 600LFM, at ambient temperatures between
30°C and 85°C. Infrared (IR) thermography and
thermocouples
measurements. (See Fig. F & Fig. G)
FDK特製の風洞実験装置は水平方向の層流を50LFM(自然対流と同
等、NC)から600LFMまで精密に制御でき、環境温度は30℃から85℃を
制御できます。温度測定には赤外線(IR)ｻｰﾓｸﾞﾗﾌｨと熱電対を使用して
います。(図F及びG参照)
http://www.fdk.com
Fig. F: FDK Original Wind Tunnel
Fig. G: Test Chamber
were
Delivering Next Generation Technology
used
for
temperature
Page 9 of 1 5
Thermal Derating
Fig.1 shows the maximum available load current vs.
ambient temperature and airflow rates. Ambient
temperature was varied between 30°C and 85°C,
with airflow rates from NC(50LFM) to 400LFM
(0.25m/s to 2.0m/s). The converter was mounted
horizontally, and the airflow was parallel to the long
axis of the converter, going from pin 1 to pin 8.
図1はある環境温度と風量の条件下における最大出力電流を表しま
す。環境温度は風量NC(50LFM)～400LFMの条件で30℃～85℃の間を
変動させています。ｺﾝﾊﾞｰﾀは水平に設置し、風向きはｺﾝﾊﾞｰﾀの長手方
向に平行で1番ﾋﾟﾝから8番ﾋﾟﾝに向けて吹いています。
The maximum available load current, for any given
set of conditions, is defined as the lower of:
(i) The output current at which the temperature of any
component reaches 120°C, or
(ii) The current rating of the converter (4A)
各々の測定条件で最大出力電流の値は下記のとおり定義します。
(i) いずれかの部品の温度が120℃に到達した時点の出力電流値、又
は
(ii) ｺﾝﾊﾞｰﾀの公称定格電流 (4A)
Note that continuous operation beyond the derated
current as specified by the derating curves (Fig.1)
may lead to degradation in performance and
reliability of the converter and may result in
permanent damage.
出力電流ﾃﾞｨﾚｰﾃｨﾝｸﾞｶｰﾌﾞ(図1)で指定された定格電流を超えた連続し
た操作は、性能の低下、信頼性の低下、及びﾓｼﾞｭｰﾙの破損を引き起こ
すことがあります。
Fig.1: Output current vs. ambient temperature and air
5
4
3
2
1
0
30
velocity at 12Vin, 0.8V to 6.6V out
40
50
Ambient Temp [DegC]
60
Ver 2.1 Oct.23, 2009
Data Sheet
70
400LFM
200LFM
NC(50)
Series
80