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參數資料
| 型號： | MAX5935EAX+ |
| 廠商： | Maxim Integrated |
| 文件頁數： | 32/44頁 |
| 文件大小： | 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： | 無 |
| 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 |
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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+ | 功能描述:熱插拔功率分布 Quad Network Power Controller 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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| 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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| MAX5936AAESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller 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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