参数资料
型号: MAX5935EAX+
厂商: Maxim Integrated
文件页数: 34/44页
文件大小: 700K
描述: IC CTRLR POWER QUAD 36-SSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 30
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:
电源电压: -32 V ~ -60 V
工作温度: -40°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: 管件
Use the program registers (Table 29) to set the nominal
value for t
FAULT
and t
START
for all ports according to
the following formula:
t
FAULT
nominal = 40.96ms + 2.72ms x N
t
START
nominal = 40.96ms + 2.72ms x N
where N is the decimal value of TF_PR[3:0] or
TS_PR[3:0], respectively.
A reset sets R28h = 77h, which sets t
FAULT
= t
START
=
60ms as shown in the Electrical Characteristics. Use
R28h in conjunction with the two TSTART and TFAULT
bits in register R16h to program the values of t
FAULT
and t
START
from about 20ms to almost 330ms with a
2.72ms resolution.
Example: Set TF_PR[3:0] = 1111b, TFAULT[1:0] = 11b
Then:
t
FAULT
= 4 x t
FAULT
nominal
= 4 x (40.96ms + 2.72ms x 15)
= 327ms
Note: The programmed value has the same percent-
age tolerance as the value specified in the Electrical
Characteristics.
Quad Network Power Controller
for Power-Over-LAN
34   ______________________________________________________________________________________
ADDRESS = 28h
YMB  L
BIT
R/W
DESCRIPTION
7
R
TF_PR[3]. t
FAULT
nominal programming bit 3
6
R
TF_PR[2]. t
FAULT
nominal programming bit 2
5
R
TF_PR[1]. t
FAULT
nominal programming bit 1
TF_PR
4
R
TF_PR[0]. t
FAULT
nominal programming bit 0
3
R
TS_PR[3]. t
START
 nominal programming bit 3
2
R
TS_PR[2]. t
START
 nominal programming bit 2
1
R
TS_PR[1]. t
START
 nominal programming bit 1
TS_PR
0
R
TS_PR[0]. t
START
 nominal programming bit 0
Table 29. Program Register 3
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