ST Life.augmented

PM8803

High efficiency integrated IEEE 802.3at PoE-PD interface and PWM controller type 2 PSE indicator, plus support for forward active clamp topology
  • active 活性

The PM8803 integrates a standard compliant Power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices. The PoE/PoE+ interface incorporates all the functions required by the IEEE 802.3at including detection, classification, undervoltage lockout (UVLO) and in-rush current limitation.

The PM8803 specifically performs IEEE802.3at Layer1 hardware classification, providing an indication of Type 2 PSE successful detection to the rest of the system.

The PM8803 has been designed to work with power either from the Ethernet cable or from an external power source such as a wall adapter, ensuring prevalence of the auxiliary source with respect to the PoE. The DC/DC section of the PM8803 features a programmable oscillator frequency, an adjustable slope compensation, dual complementary low-side drivers, programmable dead time and an internal temperature sensor.

The PM8803 targets high-efficiency conversion at all load conditions supporting flyback, forward, forward with active clamp converters and synchronous rectification.

pdf Please read
Errata Sheet
pdf 下载
数据表

Key Features

  • IEEE 802.3at compliant PD interface
  • Works with power supplied from Ethernet LAN cables or from local auxiliary sources
  • Successful IEEE802.3at Layer1 classification indicator
  • Integrated 100 V, 0. 45 Ω, 1 A hot-swap MOSFET
  • Accurate 140 mA typ. inrush current level
  • Programmable classification current
  • Programmable DC current limit up to 1 A
  • Integrated high-voltage startup bias regulator
  • Thermal shutdown protection
  • Current mode pulse width modulator
  • Programmable oscillator frequency
  • 80% maximum duty cycle with internal slope compensation
  • Support for flyback, forward, forward active clamp, flyback with synchronous rectification

图案 资源

顶部

Technical Documentation

Product Specifications

描述 版本 大小
pdf
DS7139: High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller
2.0 831 KB

Application Notes

描述 版本 大小
pdf
AN3373: IEEE802.3at compliant PD + PS design based on PM8803 low power, synchronous flyback PoE converter
1.0 1,255 KB
pdf
AN3387: PM8803 layout guidelines
1.0 944 KB
pdf
AN4006: Designing a high-efficiency (60 W on 4 pairs) PoE converter using the PM8803 and an external current booster
1.0 3,186 KB

User Manual

描述 版本 大小
pdf
UM1062: EVALPM8803-FWD: IEEE802.3at compliant demonstration kit with synchronous active clamp forward converter
1.1 1,495 KB
pdf
UM1063: EVALPM8803-FLY: IEEE802.3at compliant demonstration kit with synchronous flyback converter
2.0 1,870 KB

Related Tools and Software

Related Tools and Software

产品型号 描述
EVALPM8803-FWD IEEE802.3at compliant demonstration kit with synchronous forward PoE converter

Publications and Collaterals

Flyer

描述 版本 大小
pdf
PM8803: Integrated PoE+ PD interface and PWM controller
1.0 216 KB

样品 & 购买

顶部
产品型号 Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
PM8803ActiveHTSSOP20Tube_-1.359Distributor reported inventory date: 2014-12-20
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA14961480
Ecopack2-
PM8803TRActiveHTSSOP20Tape And Reel_-1.359No availability reported, please contact our Sales officeEcopack2-

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
Feedback Form
Customer Feedback