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参数资料
| 型号： | MAX5952CUAX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 34/50页 |
| 文件大小： | 1006K |
| 描述： | IC PSE CNTRLR FOR POE 36-SSOP |
| 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： | 远程外设（工业控制，相机，数据访问） |
| 内部开关： | 无 |
| 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, PSE Controller
for Power-Over-Ethernet
34 ______________________________________________________________________________________
Table 20a. Timing 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 (TDISC).
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 MAX5952 shuts 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 effectively sets a
minimum duty cycle that protects the external MOSFET
from overheating during a prolonged output overcur-
rent conditions. A reset sets R16h = 00h.
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相关代理商/技术参数 |
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|---|---|
| MAX5952DEAX+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5952DEAX+T | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER QUAD PSE CONTROLLER FOR - Tape and Reel |
| MAX5952DUAX+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5952DUAX+T | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER QUAD PSE CONTROLLER FOR - Tape and Reel |
| MAX5953AUTM+ | 功能描述:电压模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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