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| 型号： | MAX5935EAX+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/44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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Table 2 shows the IEEE 802.3af requirement for a PSE
classifying a PD at the Power Interface (PI).
Powered State
When the part enters PWR MODE, the t
START
and t
DISC
timers are reset. Before turning on the power, the part
checks if any other port is not turning on and if the
t
FAULT
timer is zero. Another check is performed if the
ACD_EN bit is set; in this case, the OSC_FAIL bit must
be low (oscillator is okay) for the port to be powered.
If these conditions are met, then the part enters startup
where it turns on power to the port. An internal signal,
POK_, is asserted high when V
OUT
is within 2V from
V
EE
. PGOOD_ status bits are set high if POK_ stays
high longer than t
PGOOD
. PGOOD immediately resets
when POK goes low.
The PWR_CHG bit sets when a port powers up or down.
PWR_EN sets when a port powers up and resets when a
port shuts down. The port shutdown timer lasts 0.5ms
and prevents other ports from turning off during that peri-
od, except in the case of emergency shutdowns (RESET
= L, RESET_IC = H, V
EEUVLO
, V
DDUVLO
, and TSHD).
The MAX5935 always checks the status of all ports before
turning off. A priority logic system determines the order to
prevent the simultaneous turn-on or turn-off of the ports.
The port with the lesser ordinal number gets priority over
the others (i.e., Port 1 turns on first, Port 2 second, Port 3
third and Port 4 fourth). Setting PWR_OFF_ high turns off
power to the corresponding port.
Quad Network Power Controller
for Power-Over-LAN
______________________________________________________________________________________ 15
PARAMETER
YMB L
MIN
MAX
NIT
ADDITIONAL INFORMATION
Open-Circuit Voltage
V
OC
30
V
In detection mode only.
Short-Circuit Current
I
SC
5
mA
In detection mode only.
Valid Test Voltage
V
VALID
2.8
10
V
Voltage Difference Between
Test Points
V
TEST
1
V
Time Between Any Two Test
Points
t
BP
2
ms
This timing implies a 500Hz maximum probing frequency.
Slew Rate
V
SLEW
0.1
V/祍
A
i n r R i n
R
GOOD
19
26.5
k&
R
i n r R i n
R
BAD
< 15
> 33
k&
Open-Circuit Resistance
R
OPEN
500
k&
Accept Signature
Capacitance
C
GOOD
150
nF
Reject Signature
Capacitance
C
BAD
10
礔
Signature Offset Voltage
Tolerance
V
OS
0
2.0
V
Signature Offset Current
Tolerance
I
OS
0
12
礎
Table 1. PSE PI Detection Modes Electrical Requirement
(Table 33-2 of the IEEE 802.3af Standard)
MEASURED I
CLASS
(mA)
CLASSIFICATION
0 to 5
Class 0
> 5 and < 8
May be Class 0 and 1
8 to 13
Class 1
> 13 and < 16
May be Class 0, 1, or 2
16 to 21
Class 2
> 21 and < 25
May be Class 0, 2, or 3
25 to 31
Class 3
> 31 and <35
May be Class 0, 3, or 4
35 to 45
Class 4
> 45 and < 51
Ma be Class 0 or 4
Table 2. PSE Classification of a PD
(Table 33.4 of the IEEE 802.3af Standard)
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相关代理商/技术参数 |
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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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