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参数资料
| 型号： | MAX5935EAX+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 28/44页 |
| 文件大小： | 700K |
| 描述： | IC CTRLR POWER QUAD 36-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 30 |
| 类型： | 以太网供电控制器（PoE） |
| 应用： | 远程外设（工业控制，相机，数据访问） |
| 内部开关： | 无 |
| 电源电压： | -32 V ~ -60 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 管件 |
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Setting BCKOFF_ to 1 (Table 18) enables cadence
timing on each port, where the port backs off and waits
2.2s after each failed load discovery detection. The IEEE
802.3af standard requires a PSE that delivers power
through the spare pairs (midspan PSE) to have cadence
timing. A reset sets R14h = 0000XXXX, where X is the
logic AND of the MIDSPAN and AUTO input state prior to
a reset. BCKOFF_ can be changed by software at any
time while changes to the MIDSPAN and AUTO input
state during normal operation are ignored.
TSTART[1,0] (Table 19) programs the startup timers.
Startup time is the time the port is allowed to be in current
limit during startup. TFAULT_[1,0] programs the fault
time. Fault time is the time allowable for the port to be in
current limit during normal operation. RSTR[1,0] pro-
grams the discharge rate of the TFAULT_ counter and
effectively sets the time the port remains off after an over-
current fault. TDISC[1,0] programs the load disconnect
detection time. The device turns off power to the port if it
fails to provide a minimum power maintenance signal for
longer than the load disconnect detection time (TDISC).
Set the bits in R16h to scale the TSTART, TFAULT, and
TDISC to a multiple of their nominal value specified in
the Electrical Characteristics table. R27h and R28h fur-
ther extend the programming range of these timers and
also increase the programming resolution.
When the MAX5935 shuts down a port due to an
extended overcurrent condition (either during startup or
normal operation), if RSRT_EN is set high, then the part
does not allow the port to power back on before the
restart timer (Table 19a) returns to zero. This effectively
Quad Network Power Controller
for Power-Over-LAN
28 ______________________________________________________________________________________
MODE
DESCRIPTION
00
Shutdown
01
MANUAL
10
Semi AUTO
11
AUTO
Table 15a. Mode Status
ADDRESS = 13h
YMB L
BIT
R/W
DESCRIPTION
ACD_EN4
7
R/W
Enable AC disconnect detection on ort 4
ACD_EN3
6
R/W
Enable AC disconnect detection on ort 3
A D EN2
5
R/W
En l A i nn
i n n r 2
ACD_EN1
4
R/W
Enable AC disconnect detection on ort 1
DCD_EN4
3
R/W
Enable DC disconnect detection on ort 4
DCD_EN3
2
R/W
Enable DC disconnect detection on ort 3
DCD_EN2
1
R/W
Enable DC disconnect detection on ort 2
D D EN1
0
R/W
En l D i nn
i n n r 1
Table 16. Load Disconnect Detection Enable Register
ADDRESS = 14h
YMB L
BIT
R/W
DESCRIPTION
CLASS_EN4
7
R/W
Enable classification on ort 4
CLASS_EN3
6
R/W
Enable classification on ort 3
CLASS_EN4
5
R/W
Enable classification on ort 2
CLASS_EN3
4
R/W
Enable classification on ort 1
DET EN4
3
R/W
En l
i n n r 4
DET_EN3
2
R/W
Enable detection on ort 3
DET_EN2
1
R/W
Enable detection on ort 2
DET EN1
0
R/W
En l
i n n r 1
Table 17. Detection and Classification Enable Register
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| MAX5935EAX+ | 功能描述:热插拔功率分布 Quad Network Power Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5935EAX+T | 功能描述:热插拔功率分布 Quad Network Power Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5935EAX-T | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5936AAESA | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5936AAESA+ | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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