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參數資料
型號: MAX5952CUAX+
廠商: Maxim Integrated
文件頁數: 35/50頁
文件大?。?/td> 1006K
描述: IC PSE CNTRLR FOR POE 36-SSOP
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 30
類型: 以太網供電控制器(PoE)
應用: 遠程外設(工業控制,相機,數據訪問)
內部開關:
工作溫度: 0°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
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.
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