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參數(shù)資料
| 型號： | MAX5935EAX+ |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 31/44頁 |
| 文件大小： | 700K |
| 描述： | IC CTRLR POWER QUAD 36-SSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 30 |
| 類型： | 以太網(wǎng)供電控制器（PoE） |
| 應用： | 遠程外設（工業(yè)控制，相機，數(shù)據(jù)訪問） |
| 內部開關： | 無 |
| 電源電壓： | -32 V ~ -60 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 36-BSOP（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 36-SSOP |
| 包裝： | 管件 |
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Enable SMODE function (Table 24) by setting
EN_WHDOG (R1Fh[7]) to 1. SMODE_ bit goes high when
the watchdog counter reaches zero and the port(s)
switch over to hardware-controlled mode. SMODE_ also
goes high each and every time the software tries to
power on a port but is denied since the port is in hard-
ware mode. A reset sets R1Ch = 00h.
Set EN_WHDOG (R1Fh[7]) to 1 (Table 25) to enable the
watchdog function. When activated, the watchdog timer
counter, WDTIME[7:0], continuously decrements toward
zero once every 164ms. Once the counter reaches zero
(also called watchdog expiry), the MAX5935 enters hard-
ware-controlled mode and each port shifts to a mode set
by the HWMODE_ bit in register R1Fh (Table 24). Use
software to set WDTIME and continuously set this register
to some nonzero value before the register reaches zero to
prevent a watchdog expiry. In this way, the software
gracefully manages the power to ports upon a system
crash or switchover.
While in hardware-controlled mode, the MAX5935
ignores all requests to turn the power on and the flag
SMODE_ indicates that the hardware took control of the
MAX5935 operation. In addition, the software is not
allowed to change the mode of operation in hardware-
controlled mode. A reset sets R1Eh = 00h.
Setting EN_WHDOG (Table 26) high activates the
watchdog counter. When the counter reaches zero, the
port switches to the hardware-controlled mode deter-
mined by the corresponding HWMODE_ bit. A low in
HWMODE_ switches the port into shutdown by setting
the bits in register R12h to 00. A high in HWMODE_
switches the port into auto mode by setting the bits in
register R12h to 11. If WD_INT_EN is set, an interrupt is
sent if any of the SMODE bits are set.
Quad Network Power Controller
for Power-Over-LAN
______________________________________________________________________________________ 31
ADDRESS = 1Bh
SYMBOL
BIT
R/W
DESCRIPTION
7
R
ID_CODE[4]
6
R
ID_CODE[3]
5
R
ID_CODE[2]
4
R
ID_CODE[1]
ID_CODE
3
R
ID_CODE[0]
2
R
REV [2]
1
R
REV [1]
REV
0
R
REV [0]
Table 23. ID Register
ID register keeps track of the device ID number and revision. The MAX5935s ID_CODE[4:0] = 11000b. Contact the factory for
REV[2:0] value.
ADDRESS = 1Ch
YMB L
BIT
CoR
DESCRIPTION
Reserved
7
Reserved
Reserved
6
Reserved
Reserved
5
Reserved
Reserved
4
Reserved
SMODE4
3
CoR
Hardware control flag for port 4
SMODE3
2
CoR
Hardware control flag for port 3
SMODE2
1
CoR
Hardware control flag for port 2
SMODE1
0
CoR
Hardware control flag for port 1
Table 24. SMODE Register
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| MAX5935EAX+ | 功能描述:熱插拔功率分布 Quad Network Power 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5935EAX+T | 功能描述:熱插拔功率分布 Quad Network Power 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5935EAX-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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5936AAESA | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5936AAESA+ | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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