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參數資料
型號: MAX5952CUAX+
廠商: Maxim Integrated
文件頁數: 41/50頁
文件大小: 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
______________________________________________________________________________________   41
The MAX5952 provides current readout for each port
during classification and normal power mode. The cur-
rent per port information is separated into 9 bits. They
are organized into 2 consecutive registers for each one
of the ports. The information can be quickly retrieved
using the auto-increment option of the address pointer.
To avoid the LSB register changing while reading the
MSB, the information is frozen once the addressing
byte points to any of the current readout registers.
During power mode, the current value can be calculat-
ed as
I
PORT
= N
IPD_
x 1.953125mA
During classification, the current is
I
CLASS
= N
IPD_
x 0.0975mA
where N
IPD_
is the decimal value of the 9-bit word. The
ADC saturates both at full scale and at zero. A reset
sets R30hR37h = 00h.
Table 34c. ICUT Register Bit Values for Current-Limit Threshold
ICUT_[2:0] (ADDRESS = 2Ah, 2Bh)
SCALE FACTOR
TYPICAL CURRENT-LIMIT THRESHOLD (mA)
000
1x
375
001
1.5x
563
010
1.75x
656
011
2x
750
100
2.25x
844
101
2.5x
938
110
0.3x
Class 1
111
0.53x
Class 2
Table 35. Classification Status Registers
ADDRESS = 2Ch, 2Dh, 2Eh, 2Fh
SYMBOL
BIT
R/W
DESCRIPTION
7

Reserved
Reserved
6

Reserved
ADDRESS = 30h, 31h, 32h, 33h, 34h,
35h, 36h, 37h
SYMBOL
BIT
R/W
DESCRIPTION
7
W
IPD_[8]
6
W
IPD_[7]
5
W
IPD_[6]
4
W
IPD_[5]
3
W
IPD_[4]
2
W
IPD_[3]
1
W
IPD_[2]
IPD_
0
W
IPD_[1]/IPD_[0]
Table 36. Current Registers
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