音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM5072MHX-80/NOPB Datasheet

  • LM5072MHX-80/NOPB

  • IC 0.18 A SWITCHING CONTROLLER, 645 kHz SWITCHING FREQ-MAX, ...

  • 24頁

  • NSC

掃碼查看芯片數據手冊

上傳產品規(guī)格書

PDF預覽

LM5072 Integrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux Support
March 2006
LM5072
Integrated 100V Power Over Ethernet PD Interface and
PWM Controller with Aux Support
General Description
The LM5072 Powered Device (PD) interface and Pulse-
Width-Modulation (PWM) controller provides a complete
power solution, fully compliant to IEEE 802.3af, for the PD
connecting into Power over Ethernet (PoE) networks. This
controller integrates all functions necessary to implement
both a PD powered interface and DC-DC converter with a
minimum number of external components. The LM5072 pro-
vides the flexibility for the PD to also accept power from
auxiliary sources such as AC adapters in a variety of con-
figurations. The low RDS(ON) PD interface hot swap MOS-
FET and programmable DC current limit extend the range of
LM5072 applications up to twice the power level of 802.3af
compliant PD devices. The 100V maximum voltage rating
simplifies selection of the transient voltage suppressor that
protects the PD from network transients. The LM5072 in-
cludes an easy-to-use PWM controller that facilitates the
various single-ended power supply topologies including the
flyback, forward and buck. The PWM control scheme is
based on peak current mode control, which provides inher-
ent advantages including line feed-forward, cycle-by-cycle
current limit, and simplified feedback loop compensation.
Two versions of the LM5072 provide either an 80% maxi-
mum duty cycle (-80 suffix), or a 50% maximum duty cycle
(-50 suffix).
n
n
n
n
n
n
n
n
n
100V Maximum Input Voltage Rating
Programmable DC Current Limit Up To 800mA
100V, 0.7鈩?Hot Swap MOSFET
Integrated PD Signature Resistor
Integrated PoE Input UVLO
Programmable Inrush Current Limit
PD Classification Capability
Power Good Indicator
Thermal Shutdown Protection
PWM Controller
n
Current Mode PWM Controller
n
100V Start-up Regulator
n
Error Amplifier with 2% Voltage Reference
n
Supports Isolated and Non-Isolated Applications
n
Programmable Oscillator Frequency
n
Programmable Soft-Start
n
800 mA Peak Gate Driver
n
80% Maximum Duty Cycle with Built-in Slope
Compensation (-80 device)
n
50% Maximum Duty Cycle, No Slope Compensation
(-50 device)
Applications
n
IEEE 802.3af Compliant PoE Powered Devices
n
Non-Compliant, Application Specific Devices
n
Higher Power Ethernet Powered Devices
Features
PD Interface
n
Fully Compliant IEEE 802.3af PD Interface
n
Versatile Auxiliary Power Options
n
9V Minimum Auxiliary Power Operating Range
Packages
n
TSSOP-16 EP (Exposed Pad)
Simplified Application Diagram
20184601
漏 2006 National Semiconductor Corporation
DS201846
www.national.com

LM5072MHX-80/NOPB 產品屬性

  • National Semiconductor (TI)

  • PoE / LAN Solutions

  • 1.275 V

  • 1.225 V

  • - 40 C

  • SMD/SMT

  • TSSOP-16

  • Reel

  • 2500

  • 2 mA

LM5072MHX-80/NOPB相關型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務：
賣家服務：
技術客服：

0571-85317607

網站技術支持

13606545031

客服在線時間周一至周五
9:00-17:30

關注官方微信號，
第一時間獲取資訊。

建議反饋
返回頂部

建議反饋

聯系人：

聯系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務的動力！意見一經采納，將有感恩紅包奉上哦！