參數(shù)資料
型號(hào)： SMH4803AS
廠商： Summit Microelectronics, Inc.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： Distributed Power Hot Swap Controller
中文描述： 分布式電源熱插拔控制器
文件頁(yè)數(shù)： 10/19頁(yè)
文件大?。?/td> 436K
代理商： SMH4803AS
10
SMH4803A
2051 4.4 3/15/01
Preliminary
SUMMIT MICROELECTRONICS, Inc.
The SMH4803A has programmable time and voltage
functions that can be fine-tuned for a wide variety of
applications. Because of this a manufacturer can use a
common part type across a wide range of boards that are
used on a common host but have different electrical loads,
power-on timing requirements, host voltage monitoring
needs, etc This ability shifts the focus of design away
from designing a new power interface for each board to
concentrating on the value added back-end logic. Be-
cause the programming is done at final test all combina-
tions (all 128 possibilities) are readily available as off the
shelf stock items.
Pin Detect
The Pin Detect function can be enabled or disabled.
PROGRAMMABLE FEATURES
Circuit Breaker Delay
The circuit breaker delay defines the period of time the
voltage drop across R
S
is greater than 50mV but less than
V
QCB
before the VGATE output will be shut down. This is
effectively a filter to prevent spurious shutdowns of
VGATE.
Power Good Delay
The PG delay timer that controls the delay from PG1# to
PG2#, and PG2# to PG3# being asserted.
Quick-Trip Circuit Breaker Threshold
This is the threshold voltage drop across R
S
that is placed
between V
SS
and CBSENSE.
2051 Prog Table 1.1
Note:
*
Denotes default configuration setting
l
b
m
y
S
n
o
p
c
s
e
D
.
M
.
y
T
0
4
5
1
0
5
5
0
5
5
2
0
5
5
5
0
2
0
8
6
1
0
2
5
5
.
a
M
s
U
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μ
μ
μ
μ
μ
μ
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k
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B
t
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C
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m
0
5
0
0
*
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D
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G
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1
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(
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,
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P
0
0
*
0
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*
t
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0
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d
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f
5
8
6
1
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5
0
8
6
1
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s
0
0
t
D
D
P
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t
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n
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a
o
P
*
0
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