TPS23841

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具有集成 FET 和电流感应功能的 2 类非标准宽 VIN 4 通道 PoE PSE

产品详情

Vin (min) (V) 21.5 Vin (max) (V) 57 ILIM 650mA TYP PoE standards supported 802.3at Type 1 (802.3af) FET Internal MPS method AC/DC Disconnect Pair control 2-Pair Alt A or B Operating temperature range (°C) -40 to 125 Features Integrated FET, Over Current Reporting, Over Temp Reporting Number of PSE ports 4 Rating Catalog
Vin (min) (V) 21.5 Vin (max) (V) 57 ILIM 650mA TYP PoE standards supported 802.3at Type 1 (802.3af) FET Internal MPS method AC/DC Disconnect Pair control 2-Pair Alt A or B Operating temperature range (°C) -40 to 125 Features Integrated FET, Over Current Reporting, Over Temp Reporting Number of PSE ports 4 Rating Catalog
HTQFP (PAP) 64 144 mm² 12 x 12 HTQFP (PJD) 64 144 mm² 12 x 12
  • Quad-Port Power Management With Integrated Switches and Sense Resistors
  • High Power PoE up to 25 W at PD Input Operating from a 53-V Minimum Input Power Rail
  • Wide Range Single Supply: 21.5 V up to 57 V
  • ICUT = 615 mA, ILIM = 650 mA Nominal
  • IEEE 802.3af Compatible
  • Individual Port 15-bit A/D Converters
  • Auto, Semi-Auto and Power Management Modes
  • Controlled Current Ramp Power-Up/Down for EMI Reduction
  • Over-Temperature Protection
  • DC Disconnect Detection, Supports AC Disconnect
  • High-Speed 400-kHz I2C Interface
  • Supports Legacy PD Detection
  • PowerPAD™ Package
  • Comprehensive Power Management Software Available for MPS430 Microcontroller
  • APPLICATIONS
    • Medical/Industrial Applications at 24 V
    • High Power Ethernet Enterprise Switches
    • SOHO Hubs, Ethernet Hubs
    • Ethernet High Power Mid-Spans
    • High Power PSE Injectors

PowerPAD is a trademark of Texas Instruments.

  • Quad-Port Power Management With Integrated Switches and Sense Resistors
  • High Power PoE up to 25 W at PD Input Operating from a 53-V Minimum Input Power Rail
  • Wide Range Single Supply: 21.5 V up to 57 V
  • ICUT = 615 mA, ILIM = 650 mA Nominal
  • IEEE 802.3af Compatible
  • Individual Port 15-bit A/D Converters
  • Auto, Semi-Auto and Power Management Modes
  • Controlled Current Ramp Power-Up/Down for EMI Reduction
  • Over-Temperature Protection
  • DC Disconnect Detection, Supports AC Disconnect
  • High-Speed 400-kHz I2C Interface
  • Supports Legacy PD Detection
  • PowerPAD™ Package
  • Comprehensive Power Management Software Available for MPS430 Microcontroller
  • APPLICATIONS
    • Medical/Industrial Applications at 24 V
    • High Power Ethernet Enterprise Switches
    • SOHO Hubs, Ethernet Hubs
    • Ethernet High Power Mid-Spans
    • High Power PSE Injectors

PowerPAD is a trademark of Texas Instruments.

The TPS23841 is a high-power, wide voltage range, quad-port sourcing equipment manager. The TPS23841 can provide up to 570 mA per port over a wide temperature range (-40°C to +125°C). Each port may operate from 21.5 V up to 57 V. The integrated output eliminates two external components per port (MOSFET and sense resistor) and survives 100-V transients. Four individual 15-bit A/D converters are used to measure signature resistance, voltage, current and die temperature, resulting in a simple and robust PSE solution. The TPS23841 comes with a comprehensive software solution to meet the most demanding applications which can serve as a core for all PoE system designs.

The TPS23841 has three internal supply buses (10 V, 6.3 V and 3.3 V) generated from the 48-V input supply. These supplies are used to bias all internal digital and analog circuitry. Each supply has been brought out separately for proper bypassing to insure high performance. The digital supply (3.3 V) is available for powering external loads up to 2 mA. For more demanding loads it is highly recommended to use external buffers to prevent system degradation. When the TPS23841 is initially powered up an internal Power-on-Reset (POR) circuit resets all registers and sets all ports to the off state to ensure that the device is powered up in a known safe operating state.

The TPS23841 has three modes of operation; auto mode (AM), semi-auto mode (SAM) and power management mode (PMM).

  • In auto mode the TPS23841 performs discovery, classification and delivery of power autonomously to a compliant PD without the need of a micro-controller.
  • In semi-auto mode the TPS23841 operates in auto mode but users can access the contents of all read status registers and A/D registers through the I2C serial interface. All write control registers are active except for D0 through D3 of port control register 1 (Address 0010) for limited port control. The semi-auto mode allows the TPS23841 to detect valid PD's without micro-controller intervention but adds a flexibility to perform power management activities.
  • Power management mode (with a micro-controller) allows users additional capabilities of discovering non-compliant (legacy) PDs, performing AC Disconnect and advanced power management system control that are based on real time port voltages and currents. All functions in this mode are programmed and controlled through read/write registers over the I2C interface. This allows users complete freedom in detecting and powering devices. A comprehensive software package is available that mates the power of the TPS23841 with the MSP430 micro-controller.

TPS23841 integrated output stage provides port power and low-side control. The internal low-side circuitry is designed with internal current sensing so there are no external resistors required. The output design ensures the power switches operate in the fully enhanced mode for low power dissipation.

The I2C interface allows easy application of opto-coupler circuitry to maintain Ethernet port isolation when a ground based micro-controller is required. The TPS23841 five address pins (A1-A5) allow the device to be addressed at one of 31 possible I2C addresses. Per-port write registers separately control each port state (discovery, classification, legacy, power up, etc) while the read registers contain status information of the entire process along with parametric values of discovery, classification, and real-time port operating current, voltage and die temperature.

The proprietary 15-bit integrating A/D converter is designed to meet the harsh environment where the PSEPM resides. The converter is set for maximum rejection of power line noise allowing it to make accurate measurements of line currents during discovery, classification and power delivery for reliable power management decisions.

The TPS23841 is available in either 64-pin PowerPAD™ down (PAP) or 64-pin PowerPAD up (PJD) packages.

The TPS23841 is a high-power, wide voltage range, quad-port sourcing equipment manager. The TPS23841 can provide up to 570 mA per port over a wide temperature range (-40°C to +125°C). Each port may operate from 21.5 V up to 57 V. The integrated output eliminates two external components per port (MOSFET and sense resistor) and survives 100-V transients. Four individual 15-bit A/D converters are used to measure signature resistance, voltage, current and die temperature, resulting in a simple and robust PSE solution. The TPS23841 comes with a comprehensive software solution to meet the most demanding applications which can serve as a core for all PoE system designs.

The TPS23841 has three internal supply buses (10 V, 6.3 V and 3.3 V) generated from the 48-V input supply. These supplies are used to bias all internal digital and analog circuitry. Each supply has been brought out separately for proper bypassing to insure high performance. The digital supply (3.3 V) is available for powering external loads up to 2 mA. For more demanding loads it is highly recommended to use external buffers to prevent system degradation. When the TPS23841 is initially powered up an internal Power-on-Reset (POR) circuit resets all registers and sets all ports to the off state to ensure that the device is powered up in a known safe operating state.

The TPS23841 has three modes of operation; auto mode (AM), semi-auto mode (SAM) and power management mode (PMM).

  • In auto mode the TPS23841 performs discovery, classification and delivery of power autonomously to a compliant PD without the need of a micro-controller.
  • In semi-auto mode the TPS23841 operates in auto mode but users can access the contents of all read status registers and A/D registers through the I2C serial interface. All write control registers are active except for D0 through D3 of port control register 1 (Address 0010) for limited port control. The semi-auto mode allows the TPS23841 to detect valid PD's without micro-controller intervention but adds a flexibility to perform power management activities.
  • Power management mode (with a micro-controller) allows users additional capabilities of discovering non-compliant (legacy) PDs, performing AC Disconnect and advanced power management system control that are based on real time port voltages and currents. All functions in this mode are programmed and controlled through read/write registers over the I2C interface. This allows users complete freedom in detecting and powering devices. A comprehensive software package is available that mates the power of the TPS23841 with the MSP430 micro-controller.

TPS23841 integrated output stage provides port power and low-side control. The internal low-side circuitry is designed with internal current sensing so there are no external resistors required. The output design ensures the power switches operate in the fully enhanced mode for low power dissipation.

The I2C interface allows easy application of opto-coupler circuitry to maintain Ethernet port isolation when a ground based micro-controller is required. The TPS23841 five address pins (A1-A5) allow the device to be addressed at one of 31 possible I2C addresses. Per-port write registers separately control each port state (discovery, classification, legacy, power up, etc) while the read registers contain status information of the entire process along with parametric values of discovery, classification, and real-time port operating current, voltage and die temperature.

The proprietary 15-bit integrating A/D converter is designed to meet the harsh environment where the PSEPM resides. The converter is set for maximum rejection of power line noise allowing it to make accurate measurements of line currents during discovery, classification and power delivery for reliable power management decisions.

The TPS23841 is available in either 64-pin PowerPAD™ down (PAP) or 64-pin PowerPAD up (PJD) packages.

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类型 标题 下载最新的英语版本 日期
* 数据表 Wide Voltage Range, High Power Quad-Port Ethernet Power Sourcing Equipment Manag 数据表 (Rev. A) 2007年 5月 23日
* 勘误表 TPS2384 Power Sourcing Equipment Power Manager Device 2006年 12月 1日
用户指南 TPS2384 Evaluation Module (Rev. E) 2018年 11月 27日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
用户指南 Firmware User's Guide 2007年 6月 5日
用户指南 TPS23841 8-Port High-Power PoE PSE Controller 2007年 2月 13日
应用手册 Proper Termination of Unused Port Connections (Rev. A) 2006年 11月 3日
应用手册 Electrical Transient Immunity for Power-over-Ethernet (PoE) (Rev. A) 2006年 8月 7日
应用手册 Implementation of a Port ON LED in PSE Systems 2006年 6月 23日
EVM 用户指南 TPS2384 Eight Port EVM 2006年 4月 12日
应用手册 Using Standard Power-Over-Ethernet Controllers for High-Powered Devices 2006年 4月 7日
应用手册 Simple PSE Solution Delivers High Power-Over-Ethernet to 31-35W PD over Four Pai 2006年 3月 27日
应用手册 Simple PSE Solution Delivers High Power-Over-Ethernet to 16-18W PD Over Two Pai 2006年 3月 6日
应用手册 Opto-Isolator Selection Guidelines: TPS2384 I2C Interface 2006年 2月 27日
应用手册 PSE Solution Delivers High Power-over-Ehernet to 25-W PD Over Two Pairs 2006年 2月 21日
应用手册 PSE Controller Interface Control (Rev. A) 2005年 4月 21日

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