Texas Instruments TIDA-050026-23881 Design Manual Download Page 23

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Revision History

SLVUBN3A – May 2019 – Revised October 2019

Revision History

Revision History

Changes from Original (May 2019) to A Revision

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The SLVUBN3 is completely reworked in revision A.

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Summary of Contents for TIDA-050026-23881

Page 1: ...ins a hardware kit a system firmware image and a system firmware GUI The hardware kit consists of a motherboard PSEMTHR24EVM 081 an MSP430 daughtercard PSEMCUDAUEVM 082 and a PSE daughtercard TPS23881...

Page 2: ...stem software acts quickly enough to keep the power consumption below the power budget 1 1 Key System Specifications Table 1 Key System Specifications PARAMETER SPECIFICATIONS DETAILS Input voltage 44...

Page 3: ...2 1 Block Diagram Figure 1 TIDA 050026 23881 Block Diagram A The 54 V to 3 3 V isolated DC DC is for demonstration purposes only It is not needed in a real system B Only connect a USB2ANY connector or...

Page 4: ...er or the PSEMCUDAUEVM 082 tool folder 2 2 3 MSP430F523x Hardware Design Table 2 MSP430 GPIO Pin Assignment PIN NUMBER MSP430F5234 48RGZ TERMINAL FUNCTION COMMENT COMMUNICATION 22 P3 0 I2C SDA USCI_B0...

Page 5: ...is the main IC to handle PoE functions to deliver power to PDs through Ethernet cable The TPS23881 device is an 8 channel power sourcing equipment PSE controller engineered to insert power onto Ethern...

Page 6: ...with isolated power supplies these devices block high voltages isolate grounds and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry 2 3 4 ISO...

Page 7: ...eference line undervoltage lockout cycle by cycle current limit slope compensation soft start oscillator synchronization capability and thermal shutdown 2 3 8 LM5050 The LM5050 device is used to suppo...

Page 8: ...ion voltage supervisor with low quiescent current that monitors system voltages as low as 1 15 V asserting an open drain RESET signal when the SENSE voltage drops below a preset threshold or when the...

Page 9: ...re Testing Requirement and Test Result 9 SLVUBN3A May 2019 Revised October 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated 24 Port 4 Pair Power Sourcing Equipment Refe...

Page 10: ...SCRIPTION PSEMTHR24EVM 081 TP1 55VDC VPWR TP2 GND VPWR ground TP3 OC ALERT System over current alert signal TP4 SDA I2C data TP5 SCL I2C clock TP6 PG1 Power good signal for power supply 1 TP7 PG2 Powe...

Page 11: ...Table 7 EVM Input and Output Connectors CONNECTOR DESCRIPTION PSEMTHR24EVM 081 J1 J3 DC power supply input 44 57 V VDC 41 A J2 J4 J6 J7 Edge connector for DC bus when connecting 2 boards together J5...

Page 12: ...allation TI s PSE system firmware GUI is used with the PSE system EVM kit PSEMTHR24EVM 081 PSEMCUDAUEVM 082 TPS23881EVM 083 to configure the system generate the code image and flash to MSP430 device D...

Page 13: ...ects these legacy PDs and powers on with protection Use of external sensing circuit The external sensing circuit is used to measure the total power consumption of the system Once the current exceeds t...

Page 14: ...e MSP430 P6 0 Figure 5 GUI System Configuration and PPM Configuration PPM configuration is applied to the port power management mechanism The following parameters can be configured through the PPM con...

Page 15: ...mode the total power budget equals to the sum of the power budget of the two power supplies when both power supplies are connected The total power budget equals to the remaining power budget of the p...

Page 16: ...onfiguration is applied to the port by port settings such as port PoE enable and disable port priority and port power limit only in port limit mode Figure 7 GUI Port Configuration Once everything is c...

Page 17: ...s are reviewed the GUI can generate the default code image and program the device directly through MSP FET Figure 9 GUI Program Device and Generate Hex Once the code is successfully flashed to the MSP...

Page 18: ...em status The status page shows the system device and port real time status The user can also change the system configuration in the configuration page each change is converted to a host command to th...

Page 19: ...Pair Power Sourcing Equipment Reference Design for Multi port Applications Figure 12 BSL Firmware Update Page Before using the BSL page to update the MSP430 firmware BSL code must be flashed to the MS...

Page 20: ...Documentation Feedback Copyright 2019 Texas Instruments Incorporated 24 Port 4 Pair Power Sourcing Equipment Reference Design for Multi port Applications 2 Configure the flash section Figure 14 Config...

Page 21: ...ourcing Equipment Reference Design for Multi port Applications 4 In the debug page user can read and write raw data to MSP430 following host interface protocol and to each PSE device s registers by pr...

Page 22: ...e For an example see the Layout section of the TPS23881 Type 4 4 Pair 8 Channel PoE PSE Controller With SRAM and 200 m RSENSE data sheet 4 3 1 Layout Prints To download the layer plots see the design...

Page 23: ...May 2019 Revised October 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated Revision History Revision History Changes from Original May 2019 to A Revision Page The SLVUBN...

Page 24: ...e resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reprod...