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参数资料
| 型号： | SI3460-EVB |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 4/26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
4.2. Classification
Classification is optional and is performed by applying between 15.5 and 20.5 V to the PD and measuring the
current. The maximum power level that can be drawn by the PD is determined according the following table.
Table 1. Classification Levels
Classification Level
Class 0
Class 1
Class 2
Class 3
Class 4
Minimum PSE Power Level
15.4 W
4W
7W
15.4 W
15.4 W
Current Measured
<5 mA
8–13 mA
16–21 mA
25–31 mA
35–45 mA
Currents not falling in these ranges maybe be treated as the higher or lower classification level. Currents above
45 mA may be treated as class level 0 or 4, which is 15.4 W in either case.
4.3. Power-Up
After the optional classification step, power is applied. Per the IEEE specification, the PSE must supply between 44
and 57 V to the PD. For longer durations above 50 ms the power may be removed if the maximum power level of
either 4, 7, or 15.4 W is exceeded. If the current exceeds 400 mA, the power must be removed in 75 ms. For
short-circuit protection, output power is removed immediately if the output current exceeds 800 mA or the output
voltage drops below 30 V. If power is removed due to an overload condition, detection must not be attempted again
for at least 2 s.
4.4. Disconnect (Power Removal)
The Si3460 supports a robust disconnect algorithm to avoid false disconnection. Removal of a PD can be sensed
by determining that the dc current is less than 5 mA for between 300 and 400 ms. If the current then exceeds
10 mA for at least 60 ms, the power must not be removed, and the 300–400 ms timer restarts.
4
Rev. 1.2
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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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