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参数资料
| 型号： | MAX5965BUAX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 36/54页 |
| 文件大小： | 1334K |
| 描述： | IC PSE CTRLR FOR POE 36SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | 以太网供电控制器（PoE） |
| 应用： | IP 电话，LAN 网络供电，网络路由器和交换机 |
| 内部开关： | 无 |
| 电源电压： | 2.4 V ~ 3.6 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 带卷 (TR) |
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High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
36 ______________________________________________________________________________________
Table 20a. Timing Configuration Register
ADDRESS = 16h
SYMBOL
BIT
R/W
DESCRIPTION
RSTR[1]
7
R/W
Restart timer programming bit 1
RSTR[0]
6
R/W
Restart timer programming bit 0
TSTART[1]
5
R/W
Startup timer programming bit 1
TSTART[0]
4
R/W
Startup timer programming bit 0
TFAULT[1]
3
R/W
Overcurrent timer programming bit 1
TFAULT[0]
2
R/W
Overcurrent timer programming bit 0
TDISC[1]
1
R/W
Load disconnect timer programming bit 1
TDISC[0]
0
R/W
Load disconnect timer programming bit 0
Table 20b. Startup, Fault, and Load Disconnect Timer Values for Timing Register
BIT [1:0]
(ADDRESS = 16h)
RSTR
t
DISC
t
START
t
FAULT
00
16 x t
FAULT
t
DISC
nominal (350ms, typ)
t
START
nominal (60ms, typ)
t
FAULT
nominal (60ms, typ)
01
32 x t
FAULT
1
/
4
x t
DISC
nominal
1
/
2
x t
START
nominal
1
/
2
x t
FAULT
nominal
10
64 x t
FAULT
1
/
2
x t
DISC
nominal
2 x t
START
nominal
2 x t
FAULT
nominal
11
0 x t
FAULT
2 x t
DISC
nominal
4 x t
START
nominal
4 x t
FAULT
nominal
TSTART[1,0] (Table 20a) programs the startup timers.
Startup time is the time the port is allowed to be in cur-
rent limit during startup. TFAULT[1,0] programs the
fault time. Fault time is the time allowed for the port to
be in current limit during normal operation. RSTR[1,0]
programs the discharge rate of the TFAULT_ counter
and effectively sets the time the port remains off after
an overcurrent fault. TDISC[1,0] programs the load dis-
connect detection time. The device turns off power to
the port if it fails to provide a minimum power mainte-
nance signal for longer than the load disconnect detec-
tion time (t
DISC
).
Set the bits in R16h to scale the t
START
, t
FAULT
, and
t
DISC
to a multiple of their nominal value specified in the
Electrical Characteristics table.
When the MAX5965A/MAX5965B shut down a port due
to an extended overcurrent condition (either during
startup or normal operation), if RSTR_EN is set high, the
part does not allow the port to power back on before
the restart timer (Table 20b) returns to zero. This effec-
tively sets a minimum duty cycle that protects the exter-
nal MOSFET from overheating during prolonged output
overcurrent conditions. A reset sets R16h = 00h.
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| MAX5967CETG+ | 功能描述:热插拔功率分布 I2C Hot Swap Controller 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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