LM5071

LM5071 芯片基本上是一款直流/直流转换器集成电路,但同时也是一个可以连接用电设备的接口。这个设计的优点是可以精简不同 PoE 供电系统的设计,尤其适用于必须借助交流电适配器以便获得辅助电源供应的 PoE 供电系统。

The LM5071 power interface port and pulse width modulation (PWM) controller provides a complete integrated solution for Powered Devices (PD) that connect into Power over Ethernet (PoE) systems. The LM5071 is specifically designed for the PD that must accept power from auxiliary sources such as ac adapters. The auxiliary power interface of the LM5071 activates the PWM controller when the ac adapter is connected to power the PD when PoE network power is unavailable. The LM5071 integrates an 80V, 400mA line connection switch and associated control for a fully IEEE 802.3af compliant interface with a full featured current mode pulse width modulator dc-dc converter. All power sequencing requirements between the controller interface and switch mode power supply (SMPS) are integrated into the IC。

LM5071 特点
Compatible with 12V ac adapters
Fully Compliant 802.3af Power Interface Port
80V, 1, 400 mA Internal MOSFET
Detection Resistor Disconnect Function
Programmable Classification Current
Programmable Under-voltage Lockout with Programmable Hysteresis
Thermal Shutdown Protection
Auxiliary Power Enable Pin
Current Mode Pulse Width Modulator
Supports both Isolated and Non-Isolated Applications
Error Amplifier and Reference for Non-Isolated Applications
Programmable Oscillator Frequency
Programmable Soft-start
80% Maximum Duty Cycle Limiter, Slope Compensation (-80 device)
50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 device)
LM5071 订购型号
Part Number Package Factory Lead Time Budgetary Pricing Std
Pack
Size
Package
Marking
Format
Type Pins Spec. MSL
Rating
Peak
Reflow
Weeks Qty Qty $US each
LM5071EVAL Power Over Ethernet PD Controller with Auxiliary Power Interface Full production 1+ $123.00 1 -
8 weeks N/A
LM5071MT-50 TSSOP 16 NOPB 1 260 Full production 1K+ $1.45 rail
of
92
NSUZXYTT
5071MT
-50
12 weeks 500
LM5071MT-80 TSSOP 16 NOPB 1 260 Full production 1K+ $1.45 rail
of
92
NSUZXYTT
5071MT
-80
6 weeks 2000
LM5071MTX-50 TSSOP 16 NOPB 1 260 Full production 1K+ $1.45 reel
of
2500
NSUZXYTT
5071MT
-50
6 weeks 7500
LM5071MTX-80 TSSOP 16 NOPB 1 260 Full production 1K+ $1.45 reel
of
2500
NSUZXYTT
5071MT
-80
LM5071 技术支持
LM5071 数据手册DataSheet 下载.pdf
LM5071 典型应用电路图Typical Application 下载. pdf
LM5071 典型性能测试参考Typical Performance 下载.pdf(温度与电流)
LM5071 方框图Block Diagram下载.pdf
LM5071 模拟电路仿真文件PSPICE 下载.pdf