TPS23750EVM-107: POE 5V @ 2A, 36 ~ 57Vin

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Summary

The HPA107 evaluation module implements an IEEE 802.3af-compliant class-3 power interface and a non-isolated DC/DC switching converter using the Texas Instruments TPS23750 powered device (PD) controller in a typical power-over-Ethernet (PoE) configuration.

The DC/DC converter is a 5-V output buck converter with a BOM option for 3.3 V. A small prototype area is included on the printed-circuit board. The EVM accepts a TPS23770 in place of the TPS23750 to support a PD with a legacy undervoltage lockout (UVLO) threshold.

The EVM has separate LEDs that show when the DC/DC converter and the PoE interface are active. Test points are provided at all critical nodes. Power to the EVM is provided over the spare or data lines in an Ethernet cable or by an auxiliary source like a wall adapter.

Specifications

Manufacturer Texas Instruments
Category Power Management
Sub-Category POE - Power Over Ethernet
Eval Board Part Number 296-21146-ND
Eval Board Supplier Texas Instruments
Eval Board
Normally In Stock
Topology
Step Down
Outputs and Type
1, Isolated
Voltage Out
5 V
Current Out
2 A
Voltage In
36 ~ 57 V
Efficiency @ Conditions
>70%, 44V in, 3.3V @ 0.3 ~ 2 A Out
>75%, 44V in, 5V @ 0.25 ~ 2 A Out
Features
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency
200 kHz
Component Count + Extras
39 + 16
Design Author
Texas Instruments
Internal Switch
No
Main I.C.
TPS23750
Application / Target Market
Telecom