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
相关PDF资料
MAX5937LCESA+ IC HOT-SWAP CTRLR -48V 8-SOIC
MAX5938LEEE+ IC HOT-SWAP CTRLR -48V 16-QSOP
MAX5939EESA+ IC HOT-SWAP CTRLR -48V 8-SOIC
MAX5946LETX+T IC CNTRLR PCI EXP DL 36TQFN
MAX5948BESA+T IC CNTRLR HOT SWAP 8-SOIC
MAX5949BESA+T IC CNTRLR HOT SWAP 8-SOIC
MAX5950ETJ+ IC PWM CTRL HOT-SW 12V 32TQFN-EP
MAX5952CUAX+ IC PSE CNTRLR FOR POE 36-SSOP
相关代理商/技术参数
MAX5935EAX+T 功能描述:热插拔功率分布 Quad Network Power 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
MAX5935EAX-T 功能描述:热插拔功率分布 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
MAX5936AAESA 功能描述:热插拔功率分布 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
MAX5936AAESA+ 功能描述:热插拔功率分布 48V- 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
MAX5936AAESA+T 功能描述:热插拔功率分布 48V- 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
MAX5936AAESA-T 功能描述:热插拔功率分布 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
MAX5936ABESA 功能描述:热插拔功率分布 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
MAX5936ABESA+ 功能描述:热插拔功率分布 48V- 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