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參數(shù)資料
| 型號(hào)： | MSK0002H |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | HIGH SPEED, BUFFER AMPLIFIER AMP |
| 中文描述： | 高速，緩沖放大器放大器 |
| 文件頁(yè)數(shù)： | 3/5頁(yè) |
| 文件大小： | 289K |
| 代理商： | MSK0002H |
APPLICATION NOTES
HEAT SINKING
To determine if a heat sink is necessary for your application
and if so, what type, refer to the thermal model and governing
equation below.
Thermal Model:
R
Θ
SA
= ((T
J
- T
A
)/P
D
) - (R
Θ
JC
) - (R
Θ
CS
)
= ((125°C - 80°C) / 0.36W) - 40°C/W - 0.15°C/W
= 125 - 40.15
= 84.9°C/W
This heat sink in this example must have a thermal resistance
of no more than 84.9°C/W to maintain a junction temperature
of no more than +125°C.
T
J=
P
D X
(R
Θ
JC
+R
Θ
CS +
R
Θ
SA
) +T
A
Where
T
J
=Junction Temperature
PD=Total Power Dissipation
R
Θ
JC
=Junction to Case Thermal Resistance
R
Θ
CS
=Heat Sink to Ambient Thermal Resistance
T
C
=Case Temperature
T
A
=Ambient Temperature
T
S
=Sink Temperature
Example:
This example demonstrates a worst case analysis for the buffer
output stage. This occurs when the output voltage is 1/2 the
power supply voltage. Under this condition, maximum power
transfer occurs and the output is under maximum stress.
Rev. - 10/00
3
Governing Equation:
Conditions:
VCC= ±12VDC
Vo= ±6Vp Sine Wave, Freq. = 1KHz
RL= 100
For a worst case analysis we will treat the ±6Vp sine wave as
an 6 VDC output voltage.
1.) Find Driver Power Dissipation
PD= (Vcc-Vo) (Vo/R
L
)
= (12V-6V) (6V/100
)
= 360mW
2.) For conservative design, set T
J
=+125°C Max.
3.) For this example, worst case T
A
=+80°C
4.) R
Θ
JC
= 40° C/W from MSK 0002H Data Sheet
5.) R
Θ
CS
= 0.15° C/W for most thermal greases
6.) Rearrange governing equation to solve for R
Θ
SA
Typical Applications:
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MSK0002HRH | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:RAD TOLERANT, HIGH SPEED, BUFFER AMPLIFIER |
| MSK0002KRH | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:RAD TOLERANT, HIGH SPEED, BUFFER AMPLIFIER |
| MSK0002RH | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:RAD TOLERANT, HIGH SPEED, BUFFER AMPLIFIER |
| MSK0004 | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH VOLTAGE OPERATIONAL AMPLIFIER |
| MSK0004H | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH VOLTAGE OPERATIONAL AMPLIFIER |
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