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參數(shù)資料
| 型號： | MC34982PNA |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 英文描述： | Single Intelligent High-Current Self-Protected Silicon High-Side Switch (2.0 mOhm)(單智能大電流帶自保護功能的硅高端開關（2mOhm）) |
| 中文描述： | 單智能大電流的自我保護硅高邊開關（2.0毫歐）（單智能大電流帶自保護功能的硅高端開關（2mOhm）） |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 771K |
| 代理商： | MC34982PNA |
33982
22
Go to: www.freescale.com
Overcurrent Fault (Latching)
The 33982 has eight programmable overcurrent low
detection levels (I
OCL
) and two programmable overcurrent high
detection levels (I
OCH
) for maximum device protection. The two
selectable, simultaneously active overcurrent detection levels,
defined by I
OCH
and I
OCL
, are illustrated in
Figure 4
, page 13.
The eight different overcurrent low detection levels (I
OCL0
,
I
OCL1
, I
OCL2
, I
OCL3
, I
OCL4
, I
OCL5
, I
OCL6
, and I
OCL7
) are likewise
illustrated in
Figure 4
.
If the load current level ever reaches the selected
overcurrent low detection level and the overcurrent condition
exceeds the programmed overcurrent time period (t
OC
x
), the
device will latch the output OFF.
If at any time the current reaches the selected I
OCH
level,
then the device will immediately latch the fault and turn OFF the
output, regardless of the selected t
OCL
driver.
For both cases, the device output will stay off indefinitely until
the device is commanded OFF and then ON again.
Reverse Battery
The output survives the application of reverse voltage as low
as -16 V. Under these conditions, the output’s gate is enhanced
to keep the junction temperature less than 150°C. The ON
resistance of the output is fairly similar to that in the Normal
mode. No additional passive components are required.
Ground Disconnect Protection
In the event the 33982 ground is disconnected from load
ground, the device protects itself and safely turns OFF the
output regardless the state of the output at the time of
disconnection.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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