參數(shù)資料
型號(hào)： MAX5913
廠商： Maxim Integrated Products, Inc.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： +48V Quad Hot-Swap Controllers For Power-Over-LAN
中文描述： +48V、四路、熱插拔控制器，用于LAN供電
文件頁(yè)數(shù)： 15/20頁(yè)
文件大?。?/td> 827K
代理商： MAX5913
M
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
______________________________________________________________________________________
15
MAX5913 RLYD_ is opposite to that of the MAX5914.
For the MAX5913, upon the assertion of the RLYON_
input RLYD_ sinks 100mA to DGND. For the MAX5914
when RLYON_ is high, an internal 1mA current source
pulls up RLYD_ to V
DD
. A 100mA catch diode is inter-
nally connected between RYLD_ and V
RLY
to protect
the MAX5913/MAX5914 from inductive kicks from the
relay coil. V
RLY
must be connected to the high-side
relay supply voltage.
Programmable Timing, RTIM
An external resistor from RTIM to DGND sets the fre-
quency of the internal oscillator upon which t
O
and the
auto-retry times are based.
Use 2k
to 40k
resistors for R
RTIM
.
t
O
= (R
RTIM
/ 2k
) (6.4ms)
If RTIM is unconnected (floating), an internal resistor
sets t
O
to a nominal 6.4ms.
Auto-Retry and Programmable Duty Cycle
The MAX5913/MAX5914 feature auto-retry with
adjustable duty cycle. Driving RTRYEN high enables
the auto-retry function. When the switch encounters an
overcurrent for a period greater than t
O
the switch is
turned off, and remains off for a t
OFF
programmed by
DC, a three-level input. After the t
OFF
period, the switch
is automatically turned on again. When the port
encounters a continuous overload or short-circuit con-
dition, the switch turns on and off repeatedly with the
on duty cycle of 1%, 2%, or 4% depending on the DC
input state (Table 2). When RTRYEN is low, the auto-
retry is disabled, and a fault condition at the switch
turns the switch off and the switch remains latched off.
Driving the corresponding ON control input low resets
the latch. Pulling ON high to turn on the switch.
However, the MAX5913/MAX5914 always waits a mini-
mum time t
OFF
,before restarting the switch.
Logic Interface and Status Outputs
The MAX5913/MAX5914 logic interface controls the
device functionality. All the basic control functions for
the four switches are separated. ON_ enables individual
on/off control of each MOSFET (the corresponding relay
must be on to turn on the switch). RLYON_ enables indi-
vidual on/off control of each relay. STAT_ indicates
Power-OK or Port-OC (open circuit) status of each
switch. The other logic pins are common to all four
switches. A single
FAULT
output goes low when any of
the four channels is latched off. Driving OCEN high
enables the open-circuit detectors. Driving RTRYEN
high enables the auto-retry function, RTRYEN low
enables the switch latch-off function. DC, a three-level
logic input, programs the duty cycle. The STATOUT
input selects the signal multiplexed at STAT_ outputs
(Table 1.). Driving STATOUT high routes Power-OK sta-
tus to the STAT_ outputs. Driving STATOUT low routes
Port-OC status to the STAT_ outputs.
Fault Management
UVLO and Power-OK
The MAX5913/MAX5914 monitor the V
CC
input voltage
and each switch
’
s current and voltage to determine
Power-OK, overcurrent, or Port-OC status. When V
CC
falls below the UVLO threshold,
FAULT
goes low and
all four switches and relays are turned off. When the
volage across the switch is less than 1.5V, the switch is
fully on, and if the switch is not in current limit or open
circuit, Power-OK status is good (high).
Open-Circuit Faults
With the open circuit detector enabled, when any
switch current falls below the open-circuit detector
PORT_ CONDITION
OCEN
STATOUT
STAT_
Enabled. Switch fully on and not in current limit
x
H
H
(Power-OK_ is good)
Enabled. Switch in current limit, or V
DS
> 1.5V
x
H
L
(Power-OK_ is not good)
Enabled. Switch current is less than OC threshold,
port is latched off
H
L
H
(Port-OC_
, Port current is low or zero)
Enabled. Switch fully on and output current is greater
than OC threshold
H
L
L
(Port-OC_
, Port current is good)
L
Disabled
L
L
Table 1. Status Output
相關(guān)PDF資料
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MAX5913EMH +48V Quad Hot-Swap Controllers For Power-Over-LAN
MAX5914EMH +48V Quad Hot-Swap Controllers For Power-Over-LAN
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MAX6018AEUR12 Circular Connector; No. of Contacts:3; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:22-21 RoHS Compliant: No
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5913AEMH 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5913AEMH+ 功能描述:熱插拔功率分布 48V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5913AEMH+D 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 44MQFP - Rail/Tube
MAX5913AEMH+T 功能描述:熱插拔功率分布 48V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5913AEMH+TD 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 44MQFP - Tape and Reel
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