參數(shù)資料
型號: MIC2588-1BM
廠商: Micrel Inc
文件頁數(shù): 1/21頁
文件大小: 1079K
描述: IC CTRLR HOT SWAP NEG HV 8-SOIC
標(biāo)準(zhǔn)包裝: 95
類型: 熱交換控制器
應(yīng)用: -48V Dist 電源系統(tǒng),AdvancedTCA ? 系統(tǒng)
內(nèi)部開關(guān):
電流限制: 可調(diào)
電源電壓: -19 V ~ -80 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 管件
September 2005
1
M9999-083005
MIC2588/MIC2594
Micrel
MIC2588/MIC2594
Single-Channel, Negative High-Voltage Hot
Swap Power Controllers
General Description
The MIC2588 and the MIC2594 are single-channel, nega-
tive-voltage hot swap controllers designed to address the
need for safe insertion and removal of circuit boards into
live high-voltage system backplanes, while using very few
external components. The MIC2588 and the MIC2594 are
each available in an 8-pin SOIC package and work in con-
junction with an external N-Channel MOSFET for which the
gate drive is controlled to provide inrush current limiting and
output voltage slew-rate control. Overcurrent fault protection
is also provided and includes a programmable overcurrent
threshold. During an output overload condition, a constant-
current regulation loop is engaged to ensure that the system
power supply maintains regulation. If a fault condition exceeds
a built-in 400祍 nuisance-trip delay, the MIC2588 and the
MIC2594 will latch the circuit breakers output off and will
remain in the off state until reset by cycling either the UV/OFF
pin or the power to the IC. A master Power-Good signal is
provided to indicate that the output voltage of the soft-start
circuit is within its valid output range. This signal can be used
to enable one or more DC-DC converter modules.
All support documentation can be found on Micrels web site
at www.micrel.com.
Typical Application
/PWRGD
DRAIN
UV
OV
VDD
SENSE
GATE
VEE
1
8
7
6
5
4
3
2
R1
698k&
1%
R3
12.4k&
1%
R2
11.8k&
1%
C1
1uF
R
SENSE
0.01&
5%
*D1
SMAT70A
100V
M1
SUM110N10-09
R
FDBK
15k&
C3
0.22uF
CFDBK
6.8nF
100V
R4
10&
-48V
OUT
-48V RTN
C5
100uF
C4
0.1uF
-48V
IN
(Long Pin)
-48V RTN
(Long Pin)
*C6
0.33uF
MIC2588-2BM
-48V RTN
(Short Pin)
DC-DC
CONVERTER
IN-
IN+
ON/OFF
#
OUT+
OUT-
+2.5V RTN
+2.5VOUT
VDD
*C2
22nF
Nominal Undervoltage and Overvoltage Thresholds:
  V
UV
= 36.5V
  V
OV
= 71.2V
* Optional components (See Applications Information for more details)
# An external pull-up resistor for the power-good signal is necessary for DC-DC supplies
-
Features
" MIC2588:
   Pin-for-pin functional equivalent to the
   LT1640/LT1640A/LT4250
" Provides safe insertion and removal from live 48V
(nominal) backplanes
" Operates from 19V to 80V
" Electronic circuit breaker function
" Built-in 400祍 nuisance-trip delay (t
FLT
)
" Regulated maximum output current into faults
" Programmable inrush current limiting
" Fast response to short circuit conditions (< 1祍)
" Programmable undervoltage and overvoltage lockouts
(MIC2588-xBM)
" Programmable UVLO hysteresis (MIC2594-xBM)
" Fault reporting:
   Active-HIGH (-1BM) and Active-LOW (-2BM)
   Power-Good output signal
Applications
" Central ofce switching
" 48V power distribution
" Distributed power systems
" Server Networks
Micrel, Inc. " 2180 Fortune Drive " San Jose, CA 95131 " USA " tel + 1 (408) 944-0800 " fax + 1 (408) 474-1000 " http://www.micrel.com
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