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Small business switch

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Small business switch

Block diagram

Overview

Our integrated circuits and reference designs help you create small business switches with high-bandwidth and low-power consumption. Our power over Ethernet (PoE), microcontroller, PHY and power management devices complement the Ethernet switch fabric to help you design modern, high-speed systems.

Design requirements

Today's small business switch designs require:

  • PoE capability to support the latest .bt standard.
  • Gigabit Ethernet transceivers that provide best-in-class signal integrity.
  • Small footprint with lower power consumption.
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Block diagram

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Small business switch

AC in AC in 1GbE (RJ45) Ports 1GbE (RJ45) Ports 1Gb SFP Optical Ports 1Gb SFP Optical Ports Clocking Clocking Clock buffer Clock buffer AC input AC input PoE bus PoE bus AC/DC AC/DC IBV1 IBV1 POL power POL power Hot swap Hot swap FETs FETs Buck converter Buck converter Boost converter Boost converter DC/DC module DC/DC module LDO LDO Sequencing & monitoring Sequencing & monitoring Power on reset Power on reset Supervisor and reset Supervisor and reset Logic Logic Bluetooth low energy Bluetooth low energy Bluetooth low energy Bluetooth low energy Communication interface Communication interface USB current limit switch USB current limit switch RS-232 RS-232 ESD ESD LED control LED control Shift register Shift register LED driver LED driver Power over ethernet (PoE) Power over ethernet (PoE) ESD ESD PSE controller PSE controller FET FET eFuse eFuse Switch fabric Switch fabric I2C level translator I2C level translator I2C expander I2C expander Voltage translator Voltage translator Logic Logic FPGA FPGA SoC SoC Temp sense Temp sense Flash Flash DDR DDR EEPROM EEPROM 100/1000 100/1000 SGMII (Optical) SGMII(Optical) PHY PHY PoE control MCU PoE control MCU MCU MCU Bidirectional I2C isolator Bidirectional I2C isolator Digital isolator Digital isolator DC/DC converter DC/DC converter

Technical documentation

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Type Title Date
Application note Implementing a Buck Converter With the TPS23753A 20 Sep 2010
Application note High Efficiency Class 4 PoE Powered Device 20 Jul 2011
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 19 Sep 2016
Application note Beyond BT High-Power PoE Solution using the TPS23880 and TPS2372-4 18 Sep 2018
Application note Optimize DC-DC Layout for SOT Package to Improve Thermal and Voltage Spike 13 May 2019
Application note Optimizing Network Switch Designs with Common Logic Use Cases (Rev. A) PDF | HTML 10 May 2022
Analog Design Journal Understanding thermal-resistance specification of DC/DC convert. w/ MOSFETs 08 Jan 2018
White paper Internally compensated advanced current mode (ACM) (Rev. A) 07 Dec 2018
Analog Design Journal Comparing internally-compensated advanced current mode (ACM) w/ D-CAP3™ control (Rev. A) 06 Nov 2018

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