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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 12/20頁(yè) |
| 文件大?。?/td> | 827K |
| 代理商： | MAX5913 |
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M
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
12
______________________________________________________________________________________
The first comparator compares the sensed voltage
against VSC threshold (typically 142.5mV). Choose a
sense resistor as follows:
R
SENSE
= V
SC
/ I
MAX
where IMAX is the maximum current allowed through
the switch.
When I
MAX
is reached, foldback current-limit circuitry
regulates the current limit as a function of V
OUT
(Figure
8). As V
OUT
approaches zero the maximum voltage
drop across the sense resistor is lowered to a minimum
value of 48mV (typ). This foldback feature helps reduce
the power dissipation in the external power FET during
output overload and output short-circuit conditions. If a
load with very low activation voltage is permanently
connected to the output, make the minimum limit cur-
rent sufficiently larger than the load current. If the load
current indeed exceeds the foldback-limit value the
MAX5913/MAX5914 are not able to power-up the
switch.
Test Circuits and Timing Diagrams
V
UVLO
V
CC
V
GATE
t
D, UVLO
+1V
V
IH
V
IL
+1V
RLYON
RLYD
(MAX5913)
t
ON_DEL
t
OFF_DEL
V
RLY
V
GATE
+42V
3.3V
DGND
RLYON1
ON1
ON2
RLYON2
CSP2
CSP1
DRAIN2
OUT2
270
μ
F
270
μ
F
270
μ
F
470
μ
F
270
μ
F
0.33
200
100
100
0.33
GATE2
DRAIN1
OUT1
GATE1
V
OUT
V
CC
V
TEST
MAX5913/MAX5914
(V
CC
- V
OUT
)
≤
1.5V
(POWER-OK IS GOOD)
V
CC
t
OC
V
GATE
t
LPFD
+1V
OC DETECTOR ENABLED
(INTERNAL SIGNAL)
Figure 1. UVLO Deglitch Delay
Figure 3. Port Turn-On Delay, Relay Turn-Off Delay
Figure 4. Channel-to-Channel Crosstalk Test Circuit
Figure 2. Open-Circuit Detector Deglitch Delay
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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