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參數(shù)資料
| 型號(hào)： | TDE1890V |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
| 中文描述： | 甲高邊驅(qū)動(dòng)器工業(yè)智能功率開(kāi)關(guān) |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 111K |
| 代理商： | TDE1890V |
APPLICATION INFORMATION
DEMAGNETIZATIONOF INDUCTIVE LOADS
An internal zener diode, limiting the voltage
across the Power MOS to between 50 and 60V
(V
cl
), provides safe and fast demagnetization of
inductiveloads without externalclamping devices.
The maximum energy that can be absorbed from
an
inductive
load
is
T
j
= 85
°
C).
To definethe maximum switching frequencythree
points have to be considered:
1) The total power dissipation is the sum of the
On State Power and of the Demagnetization
Energy multiplied by the frequency.
2) The total energy W dissipated in the device
during a demagnetizationcycle(figg. 2, 3) is:
specified
as
1J
(at
W
=
V
cl
L
R
L
[
I
o
–V
cl
– V
s
R
L
log
1
+
V
s
V
cl
– V
s
]
Where:
V
cl
= clamp voltage;
L = inductiveload;
R
L
= resistiveload;
Vs = supply voltage;
I
O
= I
LOAD
3)
In normal conditions the operating Junction
temperatureshould remain below 125
°
C.
If the demagnetization energy exceeds the rated
value, an externalclamp between output and +V
S
must be externally connected(see fig. 5).
The external zener will be chosen with V
zener
value lower than the internal V
cl
minimum rated
value and significantly (at least 10V) higher than
the voltage that is externally supplied to pin 10,
i.e. than the supplyvoltage.
Alternative circuit solutions can be implemented
to divert the demagnetization stress from the
TDE1890/1, if it exceeds 1J. In all cases it is rec-
ommended that at least 10V are available to de-
magnetizethe load in the turn-offphase.
A clamping circuit connected betweenground and
the output pin is not recommended. An interrup-
tion of the connection between the ground of the
load and the ground of the TDE1890/1 would
leave the TDE1890/1 alone to absorb the full
amountof the demagnetizationenergy.
Figure 2:
InductiveLoad EquivalentCircuit
TDE1890 - TDE1891
5/12
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| TDE1897CDP | 0.5A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDE1891 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
| TDE1891L | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
| TDE1891V | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
| TDE1897C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:0.5A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
| TDE1897C_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:0.5A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH |
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