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參數(shù)資料
| 型號： | MAX5913 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 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 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 827K |
| 代理商： | MAX5913 |
M
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
14
______________________________________________________________________________________
Internally the circuit compares the output voltage with
V
CC
to determine when the FET is completely on. A
“
Power-OK
”
condition is met when:
(V
CC
- V
OUT
)
≤
1.5V
The internal circuit monitors V
OUT
to determine the
value of the foldback current when the circuit goes into
current-limit conditions. The value of the current limit
decreases as the output voltage decreases in order to
limit the power dissipation of the FET. The nonlinear
relationship between V
OUT
and I
LIM
is depicted in
Figure 8.
The foldback circuit is active whenever the MAX5913/
MAX5914 is in current-limit mode after an overcurrent
condition has been detected.
Connect a catch diode to analog ground and a 100
resistor in series with OUT_ to limit the current during
negative inductive kicks that can bring OUT_ below the
ground potential (Figure 5).
Relay Drivers
The MAX5913/MAX5914 include on-chip relay drivers,
RYLD_, capable of sinking 100mA. When RLYON_
goes high the MAX5913/MAX5914 immediately enable
the relay driver, and the corresponding ON_ switch
control input is delayed 25.6ms to allow the relay to
close under a zero-voltage condition. When RLYON_
goes low, the MAX5913/MAX5914 immediately turn off
the corresponding switch, and then turn off the relay
driver after a 3.2ms delay, ensuring the relay contacts
open under a zero-current condition. The polarity of the
FOLDBACK
NL CONTROL
FROM LOGIC
CONTROLLER
DRAIN
R
SENSE
GATE
TO LOGIC
CONTROLLER
CSP
10
μ
A
8
μ
A
1mA
OUT
OCEN
ON
AGND
DGND
RLYON
RLYD
V
RLY
V
CC
CHARGE PUMP
POK COMPARATOR
DELAY
DUAL LEVEL
DETECTION
1mA
V
DD
1.236V
UVLO
RTIM
DC
RTRYEN
OPEN-CIRCUIT
DETECTOR
DC COUNTER
RESET LOGIC
RELAY
CONTROL
TIMING
OSCILLATOR
LOGIC
CONTROLLER
CSP -1.5V
3mV
142.5mV
420mV
V
DD
DGND
Figure 6. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5913EMH | +48V Quad Hot-Swap Controllers For Power-Over-LAN |
| MAX5914EMH | +48V Quad Hot-Swap Controllers For Power-Over-LAN |
| MAX6018 | ER 9C 9#16 SKT PLUG |
| 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 |
| MAX6018AEUR12-T | ER 4C 4#8 PIN PLUG |
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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