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TI - TPS23851 (ACTIVE) 高功率、宽电压范围四路端口以太网电源设备管理器 - 电源管理 以太网供电(PoE)/LAN 解决方案 供电设备

TPS23851 (ACTIVE) 高功率、宽电压范围四路端口以太网电源设备管理器 此图片只做参考用
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库存状况
  • 库存数量: 100
  • 包装规格:
  • 最小订单量:1
  • 多重订单量:1
  • 单位价格(不含税):CNY 60.00
数量:
价格
    数量单位价格(不含税)
    1-24CNY 60.00
    25-49CNY 57.00
    50-99CNY 54.00
    100-249CNY 51.00
  • 制造商:TI
  • 库存编号:1616552
  • 商品型号:TPS23851DCE
  • RoHS胁从产品:
  • 备注:
  • 产品描述:The TPS23851 is a quad-power controller engineered to insert power onto Ethernet cable according to IEEE Std 802.3at-2009 (or 802.3at) for Power Sourcing Equipment (PSE).

The TPS23851 is a quad-power controller engineered to insert power onto Ethernet cable according to IEEE Std 802.3at-2009 (or 802.3at) for Power Sourcing Equipment (PSE). The PSE controller can detect Powered devices (PDs) that have a valid signature, determine the power requirements of the devices according to the classification, and apply power to the devices, limited per 802.3at. Based on an industry standard register set, the PSE controller is software compatible with other PSE controllers for basic functionality

Beyond the industry standard operation, the TPS23851 operates with enhanced features. Port current trip point can be set to all classification thresholds of IEEE Std 802.3-2005 (or 802.3af) and can be programmed up to more than 720 mA when used with a LLDP classification stack, complying with 802.3at. The TPS23851 supports AC and DC disconnection with a precision on-chip, 110-Hz oscillator for AC waveform generation. The PSE also contains four 14-bit A/D converters that constantly monitor voltage and current on each port. This information is available on the I2C bus for power management. The unique converter integrating topology used in the TPS23851 provides inherent filtering for a robust solution.

特性

INDUSTRY STANDARD PSE

Fully IEEE Std 802.3at-2009 Compliant

Four Independent PSE Ports

PD Detection and Classification

Current Limit Output Protection with Foldback for Reduced Cost FET

AC and DC Disconnect Detection

I2C Communication

4 Bit Address for 64-Port Systems

Flexible Operation Modes

Automatic

Semi Automatic

Processor Controlled

Pin Compatible with LTC4259A and MAX5952, MAX5945, MAX5935

ENHANCED FEATURES

Never Fooled 4-Point Detection

Onboard Precision 110-Hz AC Disconnect Sine Wave Oscillator

I2C Watchdog for Failsafe Operation

Individual and Multiplexed Port Shutdown Modes

Per Port A/D Converters

14-Bit Resolution for Precision Measurements

Real-time Voltage Monitoring

Real-time Current Monitoring

Inherent Filtering

Extended –20°C to 125°C Temperature Operation

802.3at Type 2 Mode

High-Power Mode

Classification through Link Layer Discovery Protocol (LLDP)

Available in 36-lead SSOP Package

 
No. of Outputs
Adjustable Current Limit (Min) (A)
Vin (Min) (V)
Vin (Max) (V)
Pin/Package
Approx. Price (US$)
Operating Temperature Range (C)
Special Features
 
TPS23851
4    
0.052    
-70    
0.3    
36SSOP    
3.50 | 1ku    
-20 to 125    
Integrated FET 
Over Current Reporting 
Over Temp Reporting  

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