參數(shù)資料
型號(hào)： SMH4804
廠商： Summit Microelectronics, Inc.
英文描述： -48V Programmable Hot Swap Sequencing Power Controller
中文描述： - 48V的可編程序熱插拔電源控制器
文件頁(yè)數(shù)： 23/41頁(yè)
文件大小： 574K
代理商： SMH4804
SMH4804
Timing Diagram
Summit Microelectronics
2050 3.7 10/30/02
23
Figure 15. Changing Polarity of Power Good Output PG1#
Notes:
n
o
Optional bypass capacitor. If a larger value is required an 11V zener must be connected in parallel.
p
Optional interface circuit. The PG[4:1]
#
outputs can be directly connected to the power module if the input voltage to the
module is within tolerance and the voltage on the PG[4:1]# outputs doesn't exceed 15V.
q
The DRAIN Sense function may cause nuisance tripping due to voltage transients on the –48V line or when using multiple
lines. This may be avoided by one of the following methods:
A. Disable the function by connecting the DRAIN Sense pin to V
SS
directly. The components R
T
and D
D
are eliminated.
B. Add a capacitor from DRAIN Sense to V
SS
. The exact capacitance value depends upon the magnitude and duration of
the voltage transient appearing at the drain of the MOSFET.
The 10
resistor (R
G
) must be located as close as possible to the MOSFET.
2
100k
MMBTA06LT1
RT
68k
D
MMBD-
1401
100k
MMBTA06LT1
MMBTA06LT1
100nF
50V
UV
OV
PD1#
PD2#
FAULT#
RESET#
V
E
E
PG3#
PG2#
5VREF
SMH4804
PG1#
V
C
V
D
–48V
R1
R
D
6.8k
W
100μF
100V
R3
MODE
A0
A1
A2
SCL
SDA
R2
RS
20m
47k
MMBD1401
–48V
2050 Fig16
E
F
100k
MMBTA06LT1
PG4#
EN/TS
R4
1k
R
G
10
C2
10nF
100V
C1
100nF
50V
2
1
3
4
100nF
48V RTN (0V)
48V RTN (0V)
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