High-Power, Quad, PSE Controller
for Power-Over-Ethernet
______________________________________________________________________________________ 35
Setting CL_DISC to 1 (Table 21) enables port over
class current protection, where MAX5952 scales down
the overcurrent limit (V
FLT_LIM
) according to the port
classification status. This feature provides protection to
the system against PDs that violate their maximum
class current allowance.
The higher current setting is enabled only after a suc-
cessful startup so that the PD powers up as a normal
15W device.
CL_DISC, together with EN_HP_CL_ (R15h[6:4]),
EN_HP_ALL (R15h[7]), and ENx_CL6 (R1Ch[7:4]) are
used to program the high-power mode. See Table 3 for
details.
Setting OUT_ISO high (Table 21), forces DET_ to a
high-impedance state.
A reset sets R17h = 0xC0.
Table 21. Miscellaneous Configurations 1
ADDRESS = 17h
SYMBOL
BIT
R/W
DESCRIPTION
INT_EN
7
R/W
A logic-high enables INT functionality
RSTR_EN
6
R
A logic-high enables the autorestart protection time off (as set by the RSTR[1:0] bits)
Reserved
5
R
Reserved
Reserved
4
R
Reserved
POFF_CL
3
R
A logic-high prevents power-up after a classification failure (I > 50mA, valid only in AUTO
mode)
CL_DISC
2
R/W
A logic-high enables reduced current-limit voltage threshold (V
FLT_LIM
) according to port
OUT_ISO
1
R/W
Forces DET_ to high impedance. Does not interfere with other circuit operation.
Table 22. Power-Enable Pushbuttons
ADDRESS = 19h
SYMBOL
BIT
R/W
DESCRIPTION
PWR_OFF4
7
W
A logic-high powers off port 4
PWR_OFF3
6
W
A logic-high powers off port 3
PWR_OFF2
5
W
A logic-high powers off port 2
PWR_OFF1
4
W
A logic-high powers off port 1
PWR_ON4
3
W
A logic-high powers on port 4
PWR_ON3
2
W
A logic-high powers on port 3
PWR_ON2
1
W
A logic-high powers on port 2
PWR_ON1
0
W
A logic-high powers on port 1
Power-enable pushbutton for semi and manual modes
is found in Table 22. Setting PWR_ON_ to 1 turns on
power to the corresponding port. Setting PWR_OFF_ to
1 turns off power to the port. PWR_ON_ is ignored
when the port is already powered and during shut-
down. PWR_OFF_ is ignored when the port is already
off and during shutdown. After execution, the bits reset
to 0. During detection or classification, if PWR_ON_
goes high, the MAX5952 gracefully terminates the cur-
rent operation and turns on power to the port. The
MAX5952 ignores the PWR_ON_ in auto mode. A reset
sets R19h = 00h.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
MAX5953DUTM+
IC INTERFACE 802.3AF 48TQFN
MAX5954LETX+T
IC PCI EXP/HOT-PLUG CTRLR 36TQFN
MAX5955BEEE+
IC DUAL HOT-SWAP CTRLR 16-QSOP
MAX5957AETN+T
IC TRPL PCI EXP/HOT-PLUG 56-TQFN
MAX5960AECS+T
IC CTRLR HOT-PLUG QD 80-TQFP
MAX5963UTL+T
IC HOT SWAP DIO ORING CTL 40TQFN
MAX5965AEAX+
IC PSE CTRLR FOR POE 36SSOP
MAX5969DETE+T
IC CTRLR INTERFCE W/MOSFT 16TQFN
相关代理商/技术参数
MAX5952CUAX+T
功能描述:热插拔功率分布 Quad PSE Controller for POE 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
MAX5952DEAX+
制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX5952DEAX+T
制造商:Maxim Integrated Products 功能描述:HIGH-POWER QUAD PSE CONTROLLER FOR - Tape and Reel
MAX5952DUAX+
制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX5952DUAX+T
制造商:Maxim Integrated Products 功能描述:HIGH-POWER QUAD PSE CONTROLLER FOR - Tape and Reel
MAX5953AUTM+
功能描述:电压模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel
MAX5953AUTM+T
功能描述:电压模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel
MAX5953BUTM+
功能描述:电压模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel