參數(shù)資料
型號： 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
文件頁數(shù)： 25/41頁
文件大小： 574K
代理商： SMH4804
SMH4804
Timing Diagram
Summit Microelectronics
2050 3.7 10/30/02
25
Figure 17. Typical Application Sequencing Four DC/DC Converter
Notes:
n
o
p
The 10
resistor (R
G
) must be located as close as possible to the MOSFET.
Optional bypass capacitor. If a larger value is required an 11V Zener must be connected in parallel.
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.
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.
q
100k
MMBTA06LT1
68k
MMBD-
1401
100k
MMBTA06LT1
100k
MMBTA06LT1
–48V
+VIN
–VIN
ON/OFF
+VOUT
–VOUT
+VIN
–VIN
ON/OFF
+VOUT
–VOUT
+VIN
–VIN
ON/OFF
+VOUT
–VOUT
V3
V1
V2
UV
OV
PD1#
PD2#
FAULT#
RESET#
MODE
V
E
E
PG3#
PG2#
5VREF
SMH4804
PG1#
V
C
V
D
R3
R2
RS
R1
0V
ISOLATED
DC
OUTPUTS
2050 Fig18
DC / DC
Converters
with
Active Low
On/Off Control
100μF
100V
100nF
50V
E
F
100k
MMBTA06LT1
+VIN
–VIN
ON/OFF
+VOUT
–VOUT
PG4#
V4
EN/TS
R4
1k
R
G
10
C2
10nF
100V
C1
100nF
3.3nF
50V
2
1
3
4
R
D
6.8k
W
100k
D
R
T
100nF
48V RTN (0V)
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