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| 型號： | MAX5945CAX+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 1/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC NETWORK PWR CTRL 36-SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 30 |
| 控制器類型： | 網(wǎng)絡(luò)電源控制器 |
| 接口： | I²C |
| 電源電壓： | 3.3V |
| 電流 - 電源： | 4.2mA |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 36-BSOP（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 36-SSOP |
| 包裝： | 管件 |
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General Description
The MAX5945 quad network power controller is designed
for use in IEEE 802.3af-compliant power-sourcing equip-
ment (PSE). The device provides power devices (PD) dis-
covery, classification, current-limit, and both DC and AC
load disconnect detections. The MAX5945 can be used
in either endpoint PSE (LAN switches/routers) or midspan
PSE (power injector) applications. The MAX5945 is pin
and function compatible with LTC4259A.
The MAX5945 can operate autonomously or be con-
trolled by software through an I2C-compatible interface.
Separate input and output data lines (SDAIN and
SDAOUT) allow usage with optocouplers. The
MAX5945 is a slave device. Its four address inputs
allow 16 unique MAX5945 addresses. A separate
INT
output and four independent shutdown inputs (
SHD_)
allow fast response from a fault to port shutdown. A
RESET input allows hardware reset of the device. A
special watchdog feature allows the hardware to grace-
fully take over control if the software crashes. A
cadence timing feature allows the MAX5945 to be used
in midspan systems.
The MAX5945 is fully software configurable and program-
mable. A class-overcurrent detection function enables
system power management to detect if a PD draws more
current than the allowable amount for its class. Other fea-
tures are input under/overvoltage lockout, overtempera-
ture protection, output-voltage slew-rate limit during
startup, power-good, and fault status. The MAX5945’s
programmability includes gate-charging current, current-
limit threshold, startup timeout, overcurrent timeout,
autorestart duty cycle, PD disconnect AC detection
threshold, and PD disconnect detection timeout.
The MAX5945 is available in a 36-pin SSOP package
and is rated for both extended (-40°C to +85°C) and
commercial (0°C to +70°C) temperature ranges.
Applications
Power-Sourcing Equipment (PSE)
Power-Over-LAN/Power-Over-Ethernet
Switches/Routers
Midspan Power Injectors
Features
IEEE 802.3af Compliant
Pin and Function Compatible with LTC4259A
Controls Four Independent, -48V-Powered
Ethernet Ports in Either Endpoint or Midspan PSE
Applications
Wide Digital Power Input, VDIG, Common-Mode
Range: VEE to (AGND + 7.7V)
PD Violation of Class Current Protection
PD Detection and Classification
Provides Both DC and AC Load Removal
Detections
I2C-Compatible, 3-Wire Serial Interface
Fully Programmable and Configurable Operation
Through I2C Interface
Current Foldback and Duty-Cycle-
Controlled/Programmable Current Limit
Short-Circuit Protection with Fast Gate Pulldown
Direct Fast Shutdown Control Capability
Programmable Direct Interrupt Output
Watchdog Mode Enable Hardware Graceful
Takeover
MAX5945
Quad Network Power Controller
for Power-Over-LAN
________________________________________________________________ Maxim Integrated Products
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36
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32
31
30
29
28
27
26
25
24
23
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OSC_IN
AUTO
OUT1
GATE1
SENSE1
OUT2
GATE4
GATE2
SENSE2
VEE
OUT3
GATE3
SENSE3
OUT4
DET4
DET3
DET2
DET1
A0
A1
A2
A3
SDAIN
SDAOUT
SCL
MIDSPAN
SSOP
TOP VIEW
MAX5945
22
21
20
19
15
16
17
18
SENSE4
AGND
VDD
DGND
RESET
INT
SHD1
SHD2
SHD3
SHD4
Pin Configuration
19-3428; Rev 1; 9/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION
KIT
AVAILABLE
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5945CAX**
0°C to +70°C
36 SSOP
MAX5945EAX
-40°C to +85°C
36 SSOP
**Future product—contact factory for availability.
Typical Operating Circuits appear at end of data sheet.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5945CAX+ | 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr 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 |
| MAX5945CAX+T | 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr 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 |
| MAX5945CAX-T | 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 |
| MAX5945EAX | 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 |
| MAX5945EAX+ | 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr 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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