HPA01043PWPR - IEEE 802.3at PoE Interface + DC-DC Controller | TI
MPN: HPA01043PWPR ✓ NakahandaHPA01043PWPR Ulas
A PoE PD interface is the front-end circuit that performs detection, classification, and inrush-current limiting when a device such as an IP camera, wireless access point, or network switch is powered over Ethernet cabling. It sits within the power management IC hierarchy, bridging the IEEE 802.3at physical layer and the downstream isolated or non-isolated DC-DC converter that generates the system rails.
Key features include full compliance with the IEEE 802.3at high-power PoE standard, integrated detection and classification signature circuits, and a built-in current-mode DC-DC controller with a maximum switching frequency of 278 kHz, enabling compact magnetics and high conversion efficiency. The device supports up to 1.1 A output current capability in switching controller operation, and the PowerPAD HTSSOP-20 package provides low thermal impedance for high-power PD designs.
Technically, the PD interface handles the 25 kOhm detection signature, class signaling, and controlled inrush startup, while the PWM section uses peak current-mode control for cycle-by-cycle current limiting, good transient response, and straightforward loop compensation. This single-chip integration reduces external component count compared to a discrete PD controller plus separate PWM controller solution, improving reliability and BOM cost in high-volume network hardware.
Typical applications include IEEE 802.3at powered IP network cameras, 802.11ac/ax wireless access points, VoIP phones, PoE-enabled LED lighting drivers, and industrial Ethernet endpoints that must draw 25.5 W or more from the PSE.
Design consideration: verify the external MOSFET and sense resistor ratings against the inrush and fault current limits, and follow the PowerPAD layout guidance for thermal dissipation.
This page synthesizes distributor data, cross-reference alternatives, and practical design notes not found in the manufacturer datasheet, with pricing verified as of 2026-10-19.
Mga alternatibo na pwedeng ilagay na HPA01043PWPR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
TPS23754PWPR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
TPS23755PWPR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
TPS2378PWPR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
HPA01043PWPR Mga Pinakamataas na Rating at Electrical Characteristics
| Fungsi | PoE Interface and DC-DC Controller |
| PoE Standard | IEEE 802.3at (High Power PoE) |
| Role | Powered Device (PD) Interface with integrated PWM controller |
| Control Topology | Current-mode PWM |
| Maximum Switching Frequency | 278 kHz |
| Maksimum na Current ng Output | 1.1 A |
| Number of Terminals | 20 |
| Packhaging | HTSSOP-20 (PWP) with PowerPAD |
| Package Shape | Rectangular |
| Terminal Pitch | 0.65 mm |
| Uri ng Pagpapasok | Surface Mount |
| Hanay ng Temperature na Operasyon | -40C to +125C |
| Temperature Grade | Automotive |
| Category (DigiKey) | Power Switch ICs - POE / LAN |
Gabay sa Pin Configuration ng HPA01043PWPR rectangular
Pin configuration para sa HPA01043PWPR (rectangular package). Ang power device na ito ay may gate, drain, at source terminals. Para sa mga non-polarized package, sumangguni sa datasheet ng manufacturer para sa eksaktong oryentasyon ng pin 1 at mga detalye ng footprint. Kasama sa mga karaniwang aplikasyon ang disenyo ng power supply, motor driving, at load switching.
Wala ng detalyadong pinout data na magagamit para sa HPA01043PWPR.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
HPA01043PWPR ay nararapat para sa 6 aplikasyons: IP Network Cameras, Wireless Access Points, VoIP Phones and Network Endpoints, PoE LED Lighting Drivers, Industrial Ethernet Endpoints, Building Automation and Security Panels.
IP Network Cameras
The HPA01043PWPR fits IP camera designs because its IEEE 802.3at PD interface delivers up to the full 25.5 W class power from a single Ethernet cable while its integrated 278 kHz current-mode controller efficiently converts the roughly 48 V PoE rail to 12 V, 5 V, or 3.3 V camera system rails. Detection, classification, and inrush limiting are handled on-chip, guaranteeing a compliant handshake with the PSE without extra supervisory circuitry. Placed at the Ethernet magnetics output with the external pass MOSFET and sense resistor, it feeds a flyback or buck stage whose transformer can be compact thanks to the 278 kHz switching. The -40C to +125C range tolerates outdoor and ceiling-mount enclosures, and the PowerPAD HTSSOP-20 dissipates conversion heat through the PCB without a heatsink, keeping camera form factors small.
Inirekomenda
Wireless Access Points
802.11ac/ax wireless access points frequently exhaust 802.3af power budgets, and the HPA01043PWPR addresses this by supporting the IEEE 802.3at high-power standard for up to 25.5 W at the PD. Its integrated PD signature circuits perform the two-event classification needed for the PSE to allocate full at-power, while the 278 kHz current-mode PWM controller converts the PoE input into the 12 V intermediate rail feeding RF power amplifiers and the SoC core supplies. The 1.1 A controller output capability plus external MOSFET scaling accommodates peak RF transmit bursts, and cycle-by-cycle current limiting protects the radio front end during fault conditions. The automotive -40C to +125C grade also suits outdoor AP enclosures where ambient temperatures swing widely across seasons.
Inirekomenda
VoIP Phones and Network Endpoints
VoIP desk phones benefit from the HPA01043PWPR's single-chip integration of the IEEE 802.3at PD interface and the DC-DC controller, which eliminates a separate PWM IC, reduces BOM count, and frees board area for the handset audio codec and display circuitry. The on-chip detection signature and inrush control ensure the phone powers up cleanly when plugged into any compliant switch port, while the 278 kHz converter converts the PoE input to 5 V and 3.3 V rails for the CPU, Ethernet PHY, and audio stages. Current-mode control gives good line rejection against PoE cable voltage variation across long cable runs, and the PowerPAD package thermally couples losses into the phone's ground plane, avoiding hot spots inside a sealed plastic housing.
Inirekomenda
PoE LED Lighting Drivers
PoE-connected LED luminaires use the HPA01043PWPR to accept power directly from structured cabling: the PD interface completes detection and classification with the PSE, and the integrated 278 kHz controller drives a flyback or buck stage that regulates LED string current. The IEEE 802.3at power class supports brighter fixtures than 802.3af, and the 1.1 A controller capability with an external MOSFET scales to higher string currents. Current-mode control simplifies the constant-current loop compensation, and cycle-by-cycle limiting protects the LEDs during cable faults or hot-plug events. The -40C to +125C automotive temperature grade matches enclosed luminaire thermal environments, and the PowerPAD HTSSOP-20 passes dissipation into the metal luminaire housing through the PCB copper.
Inirekomenda
Industrial Ethernet Endpoints
Factory-floor sensors, IIoT nodes, and industrial switches benefit from the HPA01043PWPR's wide -40C to +125C operating range and automotive temperature grade, which survive cabinet and machine-mount environments where consumer-grade parts fail. Its IEEE 802.3at PD interface extracts up to 25.5 W over the Ethernet run, powering the node without a separate field-wired supply, and the 278 kHz current-mode controller generates the logic and actuator rails with cycle-by-cycle protection against cable faults. The integrated inrush limiting prevents nuisance tripping of the PSE during capacitive start-ups common in industrial nodes. The 20-pin HTSSOP PowerPAD package supports the high-vibration, thermally demanding conditions of industrial enclosures through robust gull-wing solder joints and PCB copper heat spreading.
Inirekomenda
Building Automation and Security Panels
Door controllers, access panels, and security system hubs use the HPA01043PWPR to combine PoE power acquisition and local conversion in one device. The IEEE 802.3at interface classifies and negotiates the higher power allocation needed for locks, readers, and standby batteries, while the 278 kHz controller steps the PoE rail to the 12 V panel bus with high efficiency. Integrated detection and inrush control guarantee compatibility with mixed-vendor PSE switches across a building, and current-mode control maintains regulation during the load transients typical of lock actuation. The -40C to +125C range covers unconditioned riser closets and rooftop equipment, and the PowerPAD thermal design keeps junction temperature within limits inside sealed panel enclosures without forced airflow.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for HPA01043PWPR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | TPS23754PWPR | TPS23755PWPR | TPS2378PWPR |
|---|---|---|---|---|
| Package | HTSSOP-20 (PWP) with PowerPAD | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| PoE Standard | IEEE 802.3at | IEEE 802.3at | IEEE 802.3at | IEEE 802.3at |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Controller Architecture | External current-mode PWM controller | External current-mode PWM controller - same | Integrated converter stage | PD interface with controller variant |
| Terminals / Pitch | 20 / 0.65 mm | 20 / 0.65 mm | 20 / 0.65 mm | 20 / 0.65 mm |
Pangunahing mga Pagkakaiba
- Catalog part-number availability (kumpara saTPS23754PWPR)
- Topology flexibility via external PWM controller (kumpara saTPS23755PWPR)
- IEEE 802.3at high-power compliance in one chip (kumpara saTPS2378PWPR)
Talaan ng Disenyo
The HTSSOP-20 (PWP) PowerPAD package relies on the exposed die pad soldered to the PCB for heat removal. Connect the PowerPAD to a solid ground plane with an array of thermal vias (typically a 3x3 or larger pattern of filled vias) under the pad. In an IEEE 802.3at design dissipating several watts at full 25.5 W load, insufficient PowerPAD soldering is the leading cause of thermal shutdown; verify solder coverage via X-ray on first-article boards and confirm junction temperature stays below the rated limit at worst-case ambient.
Size the external pass MOSFET and current-sense resistor for both the IEEE 802.3at inrush profile (controlled ramp to the operating current) and the 1.1 A controller output capability. The sense resistor sets cycle-by-cycle current limit - choose its value so the MOSFET current rating exceeds the limit with margin, and verify the MOSFET's gate-drive compatibility with the controller output. Design the flyback or buck magnetics for the actual programmed frequency within the 278 kHz maximum to balance transformer size against switching loss.
The HPA01043 prefix is a non-catalog designation: distributor cross-references map it to the TI TPS23754PWPR. For new designs and production sourcing, order and document the TPS23754PWPR to avoid obsolescence and stocking confusion. Also verify IEEE 802.3at classification programming - incorrect class resistor settings cause the PSE to allocate only 802.3af power, leading to brown-outs at full load. Confirm classification behavior with a PoE conformance test set before deployment.
Impormasyon ng Pagsunod sa Kautusan
Vyrian lists the part with an automotive temperature grade (-40C to +125C), but formal AEC-Q100 qualification status is not stated in the available data. RoHS/REACH status should be confirmed on the TI product page for the catalog-equivalent TPS23754PWPR.
