參數(shù)資料
型號(hào)： MAX5965AUAX+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： High-Power, Quad, Monolithic, PSE Controllers for Power over Ethernet; Package: SSOP;36 pin;163 mm² ; Temperature: 0°C to +85°C
中文描述： 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
封裝： ROHS COMPLIANT, SSOP-36
文件頁(yè)數(shù)： 26/54頁(yè)
文件大?。?/td> 1525K
代理商： MAX5965AUAX+
MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
32
______________________________________________________________________________________
Table 13a. Port Status Registers
ADDRESS = 0Ch, 0Dh, 0Eh, 0Fh
SYMBOL
BIT
R/W
DESCRIPTION
Reserved
7
R
Reserved
6
R
CLASS_[2]
5
R
CLASS_[1]
CLASS_
4
R
CLASS_[0]
Reserved
3
R
Reserved
2
R
DET_ST_[2]
1
R
DET_ST_[1]
DET_ST_
0
R
DET_ST_[0]
Table 13b. Detection Result Decoding Chart
DET_ST_[2:0]
(ADDRESS = 0Ch, 0Dh, 0Eh, 0Fh)
DETECTED
DESCRIPTION
000
None
Detection status unknown
001
DCP
Positive DC supply connected at the port (VAGND - VOUT_ < 1V)
010
HIGH CAP
High capacitance at the port (> 8.5F)
011
RLOW
Low resistance at the port, RPD < 15k
100
DET_OK
Detection pass, 15k
< RPD < 33k
101
RHIGH
High resistance at the port, RPD > 33k
110
OPEN0
Open port (I < 10A)
111
DCN
Negative DC supply connected to the port (VOUT_ - VEE < 2V)
Table 13c. Classification Result Decoding
Chart
CLASS_[2:0]
(ADDRESS = 0Ch, 0Dh, 0Eh, 0Fh)
CLASS RESULT
000
Unknown
001
1
010
2
011
3
100
4
101
5
110
0
111
Current limit (> ICILIM)
The port status register (Table 13a) records the results of
the detection and classification at the end of each phase in
three encoding bits each. R0Ch contains the detection
and classification status of port 1. R0Dh corresponds to
port 2, R0Eh corresponds to port 3, and R0Fh corresponds
to port 4. Tables 13b and 13c show the detection/classifi-
cation result decoding charts, respectively. For CLC_EN =
0, the detection result is shown in Table 13b. When
CLC_EN is set high, the MAX5965A/MAX5965B allow valid
detection of high capacitive load of up to 150F.
When 2-event classification is not enabled (ENx_CL6 =
0), the classification status is reported in Table 13c.
When 2-event classification is enabled (ENx_CL6 = 1),
the CLASS_[2:0] bits are set to 000 and the classifica-
tion result is reported in locations R2Ch–R2Fh.
As a protection, when POFF_CL (R17h[3], Table 21) is
set to 1, the MAX5965A/MAX5965B prohibit turning on
power to the port that returns a status 111 after classifi-
cation. A reset sets 0Ch, 0Dh, 0Eh, and 0Fh = 00h.
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