MAX5952 MAXIM [Maxim Integrated Products], MAX5952 Datasheet - Page 40

• Manufacturer Part Number: MAX5952
• Description: High-Power, Quad, PSE Controller for Power-Over-Ethernet
• Manufacturer: MAXIM [Maxim Integrated Products]

The IVEE bits enable the current-limit scaling (Table
32). This feature is used to reduce the current limit for
systems running at higher voltage to maintain the
The three ICUT_ bits (Tables 34a and 34b) allow pro-
gramming of the current-limit and overcurrent thresholds
in excess of the IEEE 802.3af standard limit. The
MAX5952 can automatically set the ICUT register or can
be manually written to by the software (see Table 3).
High-Power, Quad, PSE Controller
for Power-Over-Ethernet
Table 32. Miscellaneous Configurations 2
Table 34a. ICUT Registers 1 and 2
Table 34b. ICUT Registers 3 and 4
40
Reserved
IVEE
Reserved
ICUT4
Reserved
ICUT3
Reserved
ICUT2
Reserved
ICUT1
SYMBOL
SYMBOL
SYMBOL
______________________________________________________________________________________
ADDRESS = 29h
ADDRESS = 2Bh
ADDRESS = 2Ah
BIT
7
6
5
4
3
2
1
0
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
R/W
R/W
R/W
—
—
—
—
—
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
—
—
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
IVEE[1]
IVEE[0]
Reserved
ICUT4[2]
ICUT4[1]
ICUT4[0]
Reserved
ICUT3[2]
ICUT3[1]
ICUT3[0]
Reserved
ICUT2[2]
ICUT2[1]
ICUT2[0]
Reserved
ICUT1[2]
ICUT1[1]
ICUT1[0]
DESCRIPTION
desired output power. Table 33 sets the current-limit
scaling register. A reset or power-up sets R29h = 00h.
Class 1 and 2 limits can also be programmed by soft-
ware independently from the classification status. See
Table 3. A reset or power-up sets R2Ah = R2Bh = 00h.
Table 33. Current-Limit Scaling Register
(ADDRESS = 29h)
DESCRIPTION
DESCRIPTION
IVEE[1:0]
00
01
10
11
CURRENT LIMIT
Default
(%)
-10
-15
-5