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參數資料
| 型號： | MCZ34670EG |
| 廠商： | Freescale Semiconductor |
| 文件頁數： | 1/4頁 |
| 文件大小： | 865K |
| 描述： | IC POE CURR MODE SW REG 20-SOIC |
| 標準包裝： | 38 |
| 類型： | 以太網供電控制器（PoE） |
| 應用： | 遠程外設（工業控制，相機，數據訪問） |
| 內部開關： | 無 |
| 電源電壓： | 60V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SOIC W |
| 包裝： | 管件 |
| 產品目錄頁面： | 808 (CN2011-ZH PDF) |
Document Number: MC34670
Rev. 3.0, 12/2006
Freescale Semiconductor
Advance Information
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
?Freescale Semiconductor, Inc., 2006. All rights reserved.
IEEE 802.3af PD With Current
Mode Switching Regulator
The 34670 combines a Power Interface Port for IEEE 802.3af
Powered Devices (PD) and a high performance current mode
switching regulator. It allows a designer to build PDs with a minimum
of external components by means of integrating the required IEEE
802.3af functions and all functions necessary to build a high
efficiency DC/DC converter.
On the PD side the 34670 fully supports the IEEE802.3af standard
and provides complete signature and power classification functions.
It controls inrush current limiting and incorporates adjustable
undervoltage lockout. The switching regulator provides excellent line
and load regulation. It drives an external Power MOSFET with sense
resistor.
Features
" Integrated IEEE 802.3af Compliant Interface
" Signature Detection and Classification Functionality
" Integrated Isolation Switch
" Programmable Inrush Current Limiting Control
" Adjustable Undervoltage Lockout
" Input Voltage Range up to 80 V
" Current Mode Control
" Adjustable Oscillator
" Leading Edge Blanking
" Internal Slope Compensation Circuitry
" Input Overvoltage Protection
" 50% Duty Cycle Limitation
" Pb-Free Packaging Designated by Suffix Code EG
Figure 1. 34670 Simplified Application Diagram
POWER OVER ETHERNET
EG SUFFIX (PB-FREE)
98ASB42343B
20-PIN SOICW
34670
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
MCZ34670EG/R2
-40癈 to 85癈
20 SOICW
PHY
PHY
PSE HUB OR SWITCH
TX
RX
HOST
PSE POWER
CONTROLLER
48 V POWER
SUPPLY
-48V
GND
CAT 5
SWITCH
RJ-45
PROCESSOR
ETHERNET APPLIANCE (PD)
RX
TX
HOST
PD POWER
CONTROLLER
DC/DC
-48V
CONTROLLER
CABLE
ISOLATION SWITCH
34670
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MCZ34670EG/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:IEEE 802.3af PD With Current Mode Switching Regulator |
| MCZ34670EGR2 | 功能描述:熱插拔功率分布 POWER OVER ETHERNET RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MCZ34701EW | 功能描述:開關變換器、穩壓器與控制器 1.5A Sw-Mode Power Supply w/Linear Reg RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MCZ34701EWR2 | 功能描述:開關變換器、穩壓器與控制器 1.5A Sw-Mode Power Supply w/Linear Reg RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MCZ34702EW | 功能描述:低壓差穩壓器 - LDO QUICCSUPPLY 2 RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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