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參數資料
型號: MAX5935EAX+
廠商: Maxim Integrated
文件頁數: 32/44頁
文件大?。?/td> 700K
描述: IC CTRLR POWER QUAD 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:
電源電壓: -32 V ~ -60 V
工作溫度: -40°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
Writing a 1 to ACTESTM brings the MAX5935 to an AC
test mode. In this mode, the MAX5935 forces all GATE_
pins low and all PGOOD_ status bits high, thus allowing
AC disconnect detection without powering on the ports.
A reset sets R1Fh = 00h.
Use IGATE[2:0] (Table 27) to set the gate pin pullup
current, I
PU
, according to the following formula:
I
PU
= 50礎 - 6.25 x N
where N is the decimal value of IGATE[2:0].
Use AC_TH[2:0] to program the current threshold of the
AC disconnect comparator according to the following
formula:
IAC_TH = 213.68礎 + 28.33礎 x N
where N is the decimal value of AC_TH[2:0]
Note: The programmed value has the same percent-
age tolerance as the value specified in the Electrical
Characteristics.
When set low, DET_BYP inhibits port power-on if the
discovery detection was bypassed in AUTO mode.
When set high, it allows the part to turn on power to a
non-IEEE 802.3af load without doing detection. If
OSCF_RS is set high, the OSC_FAIL bit is ignored.
A reset sets R23h = 04h, which sets I
PU
= 50礎 and
I
AC_TH
= 325礎 as shown in the Electrical
Characteristics.
Use R27h (Table 28) to program the current-limit
threshold, V
SU_LIM
, and the nominal load disconnect
detection time, t
DISC
nominal.
Use IMAX[3:0] to program the current-limit trip voltage
according to the following formula:
V
SU_LIM
= 135mV + 19.25mV x N
Where N is the decimal value of IMAX[3:0]. The
V
FAULT_LIM
limit scales proportionally to the V
SU_LIM
value (I
FAULT
= 88% of V
SU_LIM
).
A reset sets R27h = 47h, which sets V
SU_LIM
= 212mV
(typ) as shown in the Electrical Characteristics. The
default threshold is set to meet the IEEE 802.3af stan-
dard when using an R
SENSE
= 0.5&, 1%, 100ppm.
Quad Network Power Controller
for Power-Over-LAN
32   ______________________________________________________________________________________
ADDRESS = 1Eh
YMB  L
BIT
R/W
DESCRIPTION
7
R/W
WDTIME[7]
6
R/W
WDTIME[6]
5
R/W
WDTIME[5]
4
R/W
WDTIME[4]
3
R/W
WDTIME[3]
2
R/W
WDTIME[2]
1
R/W
WDTIME[1]
WDTIME
0
R/W
WDTIME[0]
Table 25. Watchdog Timer Register
ADDRESS = 1Fh
SYMBOL
BIT
R/W
DESCRIPTION
EN WHD
7
R/W
A logic high enables the watchdog function
WD INT EN
6

Enables interrupt on SMODE_ bits
Reserved
5

ACTESTM
4
R/W
AC test mode
HWMODE4
3
R/W
P  r  4  wi  h
A  T   if l   i  hi  h  n    H  TD  WN if l   i  l  w wh  n w    h
im  r  x  ir
HWMODE3
2
R/W
P  r
wi  h
A  T   if l   i  hi  h  n    H  TD  WN if l   i  l  w wh  n w    h
im  r  x  ir
HWMODE2
1
R/W
P  r  2  wi  h
A  T   if l   i  hi  h  n    H  TD  WN if l   i  l  w wh  n w    h
im  r  x  ir
HWMODE1
0
R/W
P  r  1  wi  h
A  T   if l   i  hi  h  n    H  TD  WN if l   i  l  w wh  n w    h
im  r  x  ir
Table 26. Switch Mode Register
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MAX5935EAX-T 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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