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參數(shù)資料
| 型號： | GS-R51212S |
| 廠商： | 意法半導體 |
| 英文描述： | 31W Triple Output Step-Down Switching Regulator(31W三輸出降壓開關穩(wěn)壓器) |
| 中文描述： | 僅有31W三輸出降壓開關穩(wěn)壓器（僅有31W三輸出降壓開關穩(wěn)壓器） |
| 文件頁數(shù)： | 8/8頁 |
| 文件大小： | 87K |
| 代理商： | GS-R51212S |
8/8
The dissipatedpower in this operating condition is
about 7.4W (at typical efficiency of 81%), and the
case temperatureof the module will be:
T
case
=
T
amb
+
P
d
×
R
th
=
40
+
7.4
×
7.5
=
95.5
°
C
This valueexceedsthemaximumallowedtempera-
ture and an external heat-sink must be added. To
this purpose four holes (see mechanical drawing)
are providedon the metalsurface of the module.
Tocalculatethisheat-sink,let’sfirst determinewhat
the totalthermal resistance shouldbe:
R
th
=
T
case
(
max
)
T
amb
P
d
=
85
40
7.4
=
5.40
°
C
W
This value is the resulting value of the parallel
connection of GS-R thermal resistance and of the
additionalheatsink thermal resistance.
R
th
(
GSR
)
×
R
th
(
Heatsink
)
R
th
(
GSR
)
+
R
th
(
Heatsink
)
=
5.40
°
C / W
Tocalculatethethermalresistanceoftheadditional
heat-sink the followingequationmay be used:
R
th
(
Heatsink
) =
5.40
×
R
th
(
GSR
)
R
th
(
GSR
)
5,40
=
5.40
×
7.5
7.5
5.40
=
19.3
°
C / W
In insteadof or in addition to the external heatsink,
a forced ventilation with an air speed of about 200
linearfeet/minutecanbeusedreducingthethermal
resistance of the module at the specifiedvalue.
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from itsuse. No
license is granted by implication or otherwise under any patent or patentrights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products arenot authorized for use as criticalcomponents inlife support devices orsystems withoutexpress
written approval of SGS-THOMSON Microelectronics.
1994 SGS-THOMSON Microelectronics –All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
GS-R51212S/GS-R51515S
相關PDF資料 |
PDF描述 |
|---|---|
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| GS-R51515S | 功能描述:開關變換器、穩(wěn)壓器與控制器 +5.1/+15/-15V Stp-Dn RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| GS-R51X1XS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:31 W TRIPLE OUTPUT STEP-DOWN SWITCHING REGULATORS |
| GSR53 | 制造商:EUROQUARTZ 制造商全稱:EUROQUARTZ limited 功能描述:5 x 3.2 x 1.2mm SMD Sine Wave VCXO |
| GSR57 | 制造商:EUROQUARTZ 制造商全稱:EUROQUARTZ limited 功能描述:7 x 5 x1.8mm SMD Sine Wave VCXO |
| GSR5-V | 制造商:Ferraz Shawmut 功能描述: |
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