參數(shù)資料
型號(hào)： MAX5929BEEG+
廠商： Maxim Integrated
文件頁(yè)數(shù)： 15/23頁(yè)
文件大?。?/td> 340K
描述： IC HOT SWAP CTLR QUAD 24QSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 50
類(lèi)型： 熱交換控制器
應(yīng)用： 通用
內(nèi)部開(kāi)關(guān)： 無(wú)
電源電壓： 1 V ~ 15 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 24-QSOP
包裝： 管件
Slow-Comparator Startup Period
The slow comparator is disabled during the startup
period while the external MOSFETs are turning on.
Disabling the slow comparator allows the device to
ignore the higher-than-normal inrush current charging
the board capacitors when a card is first plugged into a
live backplane.
Slow-Comparator Normal Operation
After the startup period is complete, the slow compara-
tor is enabled and the device enters normal operation.
The comparator threshold voltage (V
SC,TH
) is
adjustable from 25mV to 100mV. The slow-comparator
response time is 3ms for a 1mV overdrive. The
response time decreases to 100祍 with a large over-
drive. The variable-speed response time allows the
MAX5927A/MAX5929AMAX5929D to ignore low-
amplitude momentary glitches, thus increasing
system noise immunity. After an extended overcurrent
condition, a fault is generated, STAT_ outputs are
deasserted, and the MOSFET gates are discharged
with a 3mA pulldown current.
Fast-Comparator Startup Period
During the startup period, the fast comparator regu-
lates the gate voltages to ensure that the voltage
across the sense resistor does not exceed the startup
fast-comparator threshold voltage (V
SU,TH
), V
SU,TH
is
scaled to two times the slow-comparator threshold
(V
SC,TH
).
Fast-Comparator Normal Operation
In normal operation, if the load current reaches the fast-
comparator threshold, a fault is generated, STAT_ is
deasserted, and the MOSFET gates are discharged
with a strong 50mA pulldown current. This happens in
the event of a serious current overload or a dead short.
The fast-comparator threshold voltage (V
FC,TH
) is
scaled to two times the slow-comparator threshold
(V
SC,TH
). This comparator has a fast response time of
200ns (Figure 7).
Undervoltage Lockout (UVLO)
The UVLO prevents the MAX5927A/MAX5929A
MAX5929D from turning on the external MOSFETs until
one input voltage exceeds the UVLO threshold (2.45V)
for t
D,UVLO
. The MAX5927A/MAX5929AMAX5929D
use power from the highest input voltage rail for the
charge pumps. This allows for more efficient charge-
pump operation. The highest V
IN_
is provided as an
output at BIAS. The UVLO protects the external
MOSFETs from an insufficient gate-drive voltage.
Low-Voltage, Quad, Hot-Swap
Controllers/Power Sequencers
_____________________________________________________________  ______________________________________________________  ________________________________  ____  _____________________   15
Figure 6. Independent Mode Startup Waveforms
t
ON
V
DRIVE
V
GATE_
V
GATE_
ON_
STAT_
V
TH
V
OUT_
V
OUT_
I
LOAD_
t
START
C
BOARD_
 = LARGE
C
BOARD_
 = 0
V
FC,TH
R
SENSE_
Figure 7. VariableSpeed/BiLevel Response
SENSE VOLTAGE (V
IN
 - V
SENSE
)
V
SC,TH
V
FC,TH
(2 x V
SC,TH
)
3ms
130約
200ns
SLOW
COMPARATOR
FAST
COMPARATOR
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5929BEEG+ 功能描述:熱插拔功率分布 Quad 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
MAX5929BEEG+T 功能描述:熱插拔功率分布 Quad 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
MAX5929CEEG+ 功能描述:熱插拔功率分布 Quad 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
MAX5929CEEG+T 功能描述:熱插拔功率分布 Quad 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
MAX5929DEEG+ 功能描述:熱插拔功率分布 Quad 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
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