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| 型号： | MAX5965BUAX+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 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 |
| 封装： | ROHS COMPLIANT, SSOP-36 |
| 文件页数： | 31/54页 |
| 文件大小： | 1525K |
| 代理商： | MAX5965BUAX+ |
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MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
______________________________________________________________________________________
37
Setting CL_DISC to 1 (Table 21) enables port over class
current protection, where the MAX5965A/MAX5965B
scales down the overcurrent limit (VFLT_LIM) according
to the port classification status. This feature provides
protection to the system against PDs that violate their
maximum class current allowance.
The MAX5965 is programmed to switch to a high-power
configuration and HP_TIME is low, the higher current set-
ting is enabled only after a successful startup so that the
PD powers up as a normal 15W device. If HP_TIME is set
together with EN_HP_ALL, the higher current setting will
be active before startup. For Classes 4, 5, and 6, the
corresponding enable bit in register R15h must be set
together with EN_HP_ALL. In any other cases, the cur-
rent level defaults to Class 0.
CL_DISC, together with EN_HP_CL_ (R15h[6:4]),
EN_HP_ALL (R15h[7]), and ENx_CL6 (R1Ch[7:4]) are
used to program the high-power mode. See Table 3 for
details.
Setting OUT_ISO high (Table 21), forces DET_ to a
high-impedance state.
A reset sets R17h = 0xC0.
Table 21. Miscellaneous Configurations 1 Register
ADDRESS = 17h
SYMBOL
BIT
R/W
DESCRIPTION
INT_EN
7
R/W
A logic-high enables INT functionality
RSTR_EN
6
R/W
A logic-high enables the autorestart protection time off (as set by the RSTR[1:0] bits)
Reserved
5
—
Reserved
4
—
Reserved
POFF_CL
3
R
A logic-high prevents power-up after a classification failure (I > 50mA, valid only in AUTO
mode)
CL_DISC
2
R/W
A logic-high enables reduced current-limit voltage threshold (VFLT_LIM) according to port
classification result
OUT_ISO
1
R/W
Forces DET_ to high impedance. Does not interfere with other circuit operation.
HP_TIME
0
R/W
Enables high power after startup.
Table 22. Power-Enable Pushbuttons Register
ADDRESS = 19h
SYMBOL
BIT
R/W
DESCRIPTION
PWR_OFF4
7
W
A logic-high powers off port 4
PWR_OFF3
6
W
A logic-high powers off port 3
PWR_OFF2
5
W
A logic-high powers off port 2
PWR_OFF1
4
W
A logic-high powers off port 1
PWR_ON4
3
W
A logic-high powers on port 4
PWR_ON3
2
W
A logic-high powers on port 3
PWR_ON2
1
W
A logic-high powers on port 2
PWR_ON1
0
W
A logic-high powers on port 1
Power-enable pushbutton for semi and manual modes
is found in Table 22. Setting PWR_ON_ to 1 turns on
power to the corresponding port. Setting PWR_OFF_ to
1 turns off power to the port. PWR_ON_ is ignored when
the port is already powered and during shutdown.
PWR_OFF_ is ignored when the port is already off and
during shutdown. After execution, the bits reset to 0.
During detection or classification, if PWR_ON_ goes
high, the MAX5965A/MAX5965B gracefully terminate
the current operation and turn on power to the port. The
MAX5965A/MAX5965B ignore the PWR_ON_ in auto
mode. A reset sets R19h = 00h.
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| MAX5965BUAX+ | 功能描述:热插拔功率分布 Quad PSE Controller for POE RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5965BUAX+T | 功能描述:热插拔功率分布 Quad PSE Controller for POE RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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