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| 型号： | SI3460-EVB |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 5/26页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL POE FOR SI3460 |
| 标准包装： | 1 |
| 主要目的： | 特殊用途 DC/DC，以太网供电（POE） |
| 输出及类型： | 1，非隔离 |
| 功率 - 输出： | 4W，7W，15.4W |
| 输出电压： | -48V |
| 电流 - 输出： | 83mA，146mA，321mA |
| 输入电压： | 11 ~ 16 V |
| 稳压器拓扑结构： | 升压 |
| 频率 - 开关： | 250kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | Si3460 |
| 其它名称： | 336-1842 |
Si3460-EVB
5. The Si3460 PSE Controller
In addition to providing a complete dc-dc controller to generate the PSE output supply, the Si3460 is a fully IEEE
compliant PSE power management controller. The Si3460 is specifically designed and configured to work with an
applications circuit (Si3460-EVB) that together implement a single port PSE solution for either midspans or
endpoints.
Referring to the detailed evaluation board schematics in Section “8. Si3460-EVB Schematics and PCB Layout”, the
overall functionality is described for each operating state of the Si3460 as follows:
5.1. Initialization and Operating Mode Configuration
The Si3460 is initialized at power up, or whenever pin 8 (RST) is held low and then allowed to transition high. Upon
reset (RST asserted), the voltage at the STATUS pin (as determined by resistors R28 and R30) is sensed to
determine the operating mode of the Si3460. The detection process begins immediately after initialization.
Any combination of the following three operating modes can be set by the R28 and R30 resistor pair, as indicated
below:
?? Classification
level: sets what maximum power level the Si3460 will support.
?? Endpoint
or midspan mode: controls the backoff timing per the IEEE specifications.
?? Restart action on fault or overload: determines whether or not the Si3460 will automatically restart after 2 s
when a fault or overload condition (e.g., input UVLO, output short-circuit event, classification power level
exceeded) is detected, or wait to restart until the RST pin is asserted.
Table 2. Operating Modes
Nominal Status Pin
Operating Mode
Voltage
R28, R30
Power Level
Supported (W)
Classes
Supported
Endpoint/
Midspan
Restart Action on
Fault or Overload
Event
Pin voltage at VEE
3.0 V
2.75 V
2.5 V
2.25 V
2.0 V
1.75 V
1.5 V
1.25 V
1.0 V
0.5 V
< 0.25 V
2 k ? , NP
2.21 k ? , 22.1 k ?
2.37 k ? , 11.8 k ?
2.61 k ? , 8.06 k ?
2.94 k ? , 6.19 k ?
3.32 k ? , 4.99 k ?
3.83 k ? , 4.22 k ?
4.42 k ? , 3.57 k ?
5.36 k ? , 3.16 k ?
6.81 k ? , 2.80 k ?
14 k ? , 2.26 k ?
NP, 2 k ?
15.4
7.0
4.0
15.4
7.0
4.0
4.0
7.0
15.4
4.0
7.0
15.4
All class levels
Class 1 or 2
Class 1
All class levels
Class 1 or 2
Class 1
Class 1
Class 1 or 2
All class levels
Class 1
Class 1 or 2
All class levels
Endpoint
Midspan
Auto restart after 2 s
Restart on RST low
or when open circuit
detected
Restart on RST low
or when open circuit
detected
Auto restart after 2 s
Rev. 1.2
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI3460-XYY-GM | 制造商:SILABS 制造商全称:SILABS 功能描述:IEEE 802.3af PSE INTERFACE AND DC-DC CONTROLLER |
| SI3461 | 制造商:SILABS 制造商全称:SILABS 功能描述:SINGLE-PORT IEEE 802.3AT POE/POE+ PSE INTERFACE |
| Si3461-E01-GM | 功能描述:电源开关 IC - POE / LAN Single-Port PoE / PoE+ PSE interface RoHS:否 制造商:Fairchild Semiconductor 开关数量:Single 开关配置:SPST 开启电阻（最大值）:7.3 Ohms 串话: 带宽: 开启时间（最大值）:13 ns 关闭时间（最大值）:20 ns 切换电压（最大）: 工作电源电压:8 V to 26 V 最大工作温度:+ 125 C 安装风格:Through Hole 封装 / 箱体:TO-220F-6 |
| SI3461-E01-GMR | 功能描述:IC POWER MANAGEMENT CTLR 11VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| Si3461-E02-GM | 功能描述:电源开关 IC - POE / LAN Single-port PoE PoE+ PSE interface RoHS:否 制造商:Fairchild Semiconductor 开关数量:Single 开关配置:SPST 开启电阻（最大值）:7.3 Ohms 串话: 带宽: 开启时间（最大值）:13 ns 关闭时间（最大值）:20 ns 切换电压（最大）: 工作电源电压:8 V to 26 V 最大工作温度:+ 125 C 安装风格:Through Hole 封装 / 箱体:TO-220F-6 |
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