Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Role | PoE powered-device front-end controller |
| Standard | IEEE 802.3af PD feature set |
| Switch | Integrated 100-V low-side pass switch family architecture |
| Inrush / Limit | Programmable inrush with 450-mA fixed current-limit family behavior |
| UVLO | TPS2376 adjustable-UVLO variant |
| Power Good | Open-drain power-good reporting |
| Protection | Overtemperature plus PoE detection/classification support |
| Exact Package | SO-8 order-code family; exact -H procurement suffix retained from source batch |
Product Overview
TPS2376DDAR-H is a PoE powered-device interface, not an Ethernet PHY. It handles IEEE 802.3af detection, classification, inrush and protected connection of the incoming PoE supply to the downstream DC/DC converter.
The TPS2376 variant provides adjustable undervoltage lockout so the designer can choose when the downstream converter is allowed to start and stop as the PoE input changes. Power-good can coordinate that handoff with the converter enable.
This is a legacy PoE generation tied to the 802.3af power level. The exact “-H” procurement suffix is retained from the source record and should be matched exactly when sourcing rather than trimmed to the base family.
For related devices, see HKEQGOO’s PoE Controllers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TPS2376DDAR-H |
| Role | PoE powered-device front-end controller |
| Standard | IEEE 802.3af PD feature set |
| Switch | Integrated 100-V low-side pass switch family architecture |
| Inrush / Limit | Programmable inrush with 450-mA fixed current-limit family behavior |
| UVLO | TPS2376 adjustable-UVLO variant |
| Power Good | Open-drain power-good reporting |
| Protection | Overtemperature plus PoE detection/classification support |
| Exact Package | SO-8 order-code family; exact -H procurement suffix retained from source batch |
| Manufacturer Status | Legacy / verify availability |
| Part Marking | TPS2376 family marking per TI datasheet/package option |
Functional Highlights
PD front end separates PoE handshake from DC/DC conversion
Detection/classification and inrush behavior are handled before the isolated/nonisolated converter stage is enabled.
Adjustable UVLO coordinates converter startup
The threshold can be aligned with transformer/converter input requirements instead of accepting a fixed turn-on point.
Design Considerations
- Design detection/classification resistors and inrush components to the exact PoE class requirement.
- Set UVLO with margin for cable drop and DC/DC startup current.
- Treat this as 802.3af-era PD capability; do not claim 802.3at/bt power classes.
Product Status and Exact Order Code
Texas Instruments/source evidence identifies TPS2376DDAR-H as Legacy exact order code from source batch; verify current manufacturer availability at quotation time.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
