HPA01124PWPR - IEEE 802.3at PoE Interface + DC/DC Controller | TI
Teilenummer: HPA01124PWPR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.2 | $6,20 |
| 10 | $5.58 | $55,80 |
| 100 | $4.96 | $496,00 |
| 500 | $4.34 | $2.170,00 |
| 1.000 | $3.72 | $3.720,00 |
HPA01124PWPR Übersicht
A PoE interface and DC-DC controller is a power management IC that performs the IEEE 802.3at powered-device handshake (detection, classification, and inrush-current limiting on the Ethernet power pair) and then controls an external DC-DC converter stage that steps the 48V-class PoE input down to the system rail. In the power management hierarchy it sits between the PoE front end and the point-of-load regulators in powered devices such as IP cameras, wireless access points, and VoIP telephones.
Key features of the HPA01124PWPR include compliance with the IEEE 802.3at standard (Type 2, up to 25.5 W at the powered device), a current-mode control architecture that simplifies loop compensation and gives fast transient response, high conversion efficiency for reduced thermal stress, and an extended -40C to +125C operating range. The single-chip integration of the PoE interface and switching controller reduces bill-of-material count compared with two-chip discrete solutions.
Architecturally, the device combines the PD interface block with a PWM switching controller that drives external power MOSFETs. Current-mode control provides cycle-by-cycle current limiting, which protects the external MOSFET and transformer during overload and startup inrush events. The 57V maximum input rating covers the worst-case PoE PSE output voltage plus cable drop.
Typical applications include IEEE 802.3at powered devices such as network IP security cameras, 802.11ac wireless access points, and PoE-powered LED lighting and building-automation nodes, where a single Ethernet cable must deliver both data and up to Class-4 power.
When designing with this device, verify the external MOSFET voltage rating against the 57V maximum input plus switching spikes, and follow the datasheet layout guidance for the power-pad thermal connection.
This page synthesizes distributor pricing, alternative-part guidance, and practical design notes that are not consolidated in the manufacturer datasheet.
Drop-in-Alternativen für HPA01124PWPR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
TPS23861PWPR
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
HPA01124PWPR Grenzwerte & elektrische Eigenschaften
| Funktion | PoE interface and DC-DC controller (IEEE 802.3at) |
| Standard Compliance | IEEE 802.3at (PoE+) |
| Control Mode | Current-mode |
| Maximum Input Voltage | 57 V |
| Maximaler Ausgangsstrom | 1.1 A |
| Wirkungsgrad | High efficiency (per Mouser listing) |
| Betriebstemperaturbereich | -40C to +125C |
| Temperature Grade | Automotive |
| Gehäuse | HTSSOP-20 (PW), PowerPAD |
| Number of Terminals | 20 |
| Package Shape | Rectangular |
| Montageart | Surface Mount |
| Product Family | Power Switch ICs - PoE / LAN |
HPA01124PWPR rectangular Pinbelegungsleitfaden
Pinbelegung für HPA01124PWPR (rectangular-Gehäuse). Dieses Leistungsbauteil verfügt über Gate-, Drain- und Source-Anschlüsse. Bei nicht gepolten Gehäusen entnehmen Sie die genaue Ausrichtung von Pin 1 und Footprint-Details dem Herstellerdatenblatt. Typische Anwendungen sind Netzteilentwurf, Motoransteuerung und Lastschaltung.
Keine detaillierten Pinbelegungsdaten verfügbar für HPA01124PWPR.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
HPA01124PWPR ist geeignet für 6 Anwendungs: IP Security Cameras, Wireless Access Points, VoIP Telephones, PoE LED Lighting and Building Automation, Industrial Network Edge Devices, Automotive Ethernet-Backed Systems.
IP Security Cameras
Network IP cameras are the classic IEEE 802.3at powered device: one Ethernet cable carries both video data and up to 25.5 W of Class 4 power. The HPA01124PWPR fits this role because its integrated PD interface performs the detection, classification, and inrush-limiting handshake required by 802.3at, while the current-mode DC-DC controller steps the 48 V-class PoE rail down to the camera's 12 V or 5 V system rail from a maximum input of 57 V. The -40C to +125C range covers outdoor camera enclosures exposed to temperature extremes, and the high-efficiency conversion reduces heat dissipation inside sealed housings, improving image-sensor thermal noise performance and long-term reliability. The 1.1 A output capability supports camera SoC, IR illuminators, and PTZ motors.
Empfohlen
Wireless Access Points
Enterprise 802.11ac/ax wireless access points typically draw their power from a PoE switch over the Ethernet cable, requiring an IEEE 802.3at PD interface front end. The HPA01124PWPR integrates that interface together with a current-mode DC-DC controller in a single 20-pin HTSSOP, reducing board area in the dense access-point power section and cutting BOM count versus separate PD controller plus PWM controller chips. Its 57 V maximum input handles worst-case PoE PSE output plus cable drop, and the -40C to +125C automotive temperature grade suits ceiling-mounted and outdoor access-point installations. High conversion efficiency is critical here because access points run continuously; every point of efficiency gain reduces heatsink size and sustains peak radio transmit power without thermal throttling.
Empfohlen
VoIP Telephones
PoE-powered VoIP business telephones receive IEEE 802.3af/at power from the desk switch and must present a compliant PD interface with proper classification so the switch allocates sufficient power budget. The HPA01124PWPR performs signature detection and class advertising through its integrated PoE interface, then its current-mode controller generates the telephone's internal 5 V and 3.3 V rails from the 48 V-class input, staying within the 57 V maximum rating. The integrated single-chip solution keeps the phone's power section compact and cost-effective at high production volumes, while current-mode control gives clean transient response when the handset display backlight and speaker amplifier switch on. The -40C to +125C range provides margin for enclosed desk hardware and warehouse-deployed phones.
Empfohlen
PoE LED Lighting and Building Automation
Connected LED luminaires and building-automation nodes increasingly use PoE as the single-cable power and control medium in smart-building deployments. The HPA01124PWPR serves as the powered-device front end, handling 802.3at detection and classification while its current-mode DC-DC controller converts the PoE voltage to the fixture's LED-driver or node supply, with a maximum input of 57 V covering PoE worst-case conditions. The automotive-grade -40C to +125C operating range tolerates luminaire and plenum temperatures, and high efficiency minimizes heat inside enclosed fixtures, protecting LED lifetime (L70 hours). Its 1.1 A output capability supports sensor-and-controller nodes plus moderate LED loads, making it a compact single-IC solution for structured-wiring lighting systems.
Empfohlen
Industrial Network Edge Devices
Industrial Ethernet switches, IoT gateways, and edge-compute nodes in factories benefit from PoE power delivery because it eliminates local power supplies at each node. The HPA01124PWPR provides the IEEE 802.3at PD interface and current-mode converter control needed to generate the node's main rail from the PoE pair, with the 57 V maximum input absorbing long-cable voltage transients common in industrial structured wiring. Its -40C to +125C automotive temperature grade matches industrial ambient specifications on factory floors and in outdoor cabinets, and the HTSSOP PowerPAD package allows robust thermal design on high-reliability PCBs. Integration of PD interface and PWM controller in one 20-pin IC simplifies qualification and reduces points of failure in always-on infrastructure.
Empfohlen
Automotive Ethernet-Backed Systems
Distributor parametric data (Vyrian, Partstack) classifies the HPA01124PWPR with an automotive temperature grade and -40C to +125C operation, positioning it for automotive and transportation applications where PoE-style power-over-data-cabling architectures are used - for example, camera and sensor modules in commercial-vehicle and rolling-stock networking infrastructure that adopt 802.3at-compatible power schemes. The current-mode controller with cycle-by-cycle current limiting protects the external MOSFET during automotive load-transient events and cold-crank-like input dips, while the 57 V maximum input provides headroom against load-dump-style overvoltage on long cabling. Designers should confirm formal AEC-Q100 qualification status with Texas Instruments when the end system requires certified automotive components.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für HPA01124PWPR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | TPS23861PWPR |
|---|---|---|
| Package | HTSSOP-20 (PW) PowerPAD | HTSSOP-20 (PW) - same |
| Brand | Texas Instruments | Texas Instruments |
| PoE Standard | IEEE 802.3at | IEEE 802.3at |
| Control Mode | Current-mode | Current-mode |
| Operating Temperature | -40C to +125C | -40C to +125C |
| Temperature Grade | Automotive | Automotive / industrial per suffix |
| Integration | PD interface + DC-DC controller (single chip) | PD interface + DC-DC controller (single chip) |
Wichtigste Unterscheidungsmerkmale
- Single-chip integration of PD interface and DC-DC controller (vs. TPS23861PWPR)
- Automotive temperature grade (vs. TPS23861PWPR)
- 57 V maximum input with current-mode control (vs. TPS23861PWPR)
Designhinweise
The HPA01124PWPR controls external power MOSFETs for the DC-DC stage; select MOSFETs with a VDS rating comfortably above the 57 V maximum input plus switching spikes and ringing (typically a margin of 20-30%). Verify the transformer or inductor saturation current against the current-mode cycle-by-cycle limit so that the 1.1 A output requirement is met with headroom. Since the part is current-mode controlled, slope compensation settings per the datasheet must match your duty-cycle range to avoid subharmonic oscillation at high VOUT/VIN ratios.
The HTSSOP-20 (PW) PowerPAD is the primary thermal path. Solder the exposed pad to a copper pour with an adequate array of thermal vias to the ground plane; an unsoldered or poorly soldered PowerPAD dramatically increases junction temperature. Estimated: at high efficiency the device itself dissipates little, but any sense-element and gate-drive losses concentrate at the IC, so verify junction temperature with a thermal image at worst-case 57 V input and full 1.1 A load in the -40C to +125C envelope.
Keep the PoE detection and classification sense traces away from the high-dv/dt switch node to prevent false detection or misclassification during the IEEE 802.3at handshake. Place the current-sense resistor physically adjacent to the IC with Kelvin connections, and keep the gate-drive loop short and wide to minimize ringing. Add a 0.1 uF ceramic decoupling capacitor directly at the IC supply pin, plus bulk capacitance sized per the datasheet typical application circuit to handle inrush limiting during PD startup.
Do not exceed 57 V on the input front end - PoE PSE outputs plus cable drop and transients can approach this limit, so include the recommended input transient protection. Ensure classification resistor settings advertise the true system power class; under-classing causes switch port shutdowns under peak load, while over-classing wastes PSE power budget. Finally, confirm any substitute part (such as a family variant) has an identical pinout before second-sourcing an existing PCB footprint.
Compliance-Informationen
Distributor data indicates an automotive temperature grade, but formal AEC-Q100 qualification, RoHS/REACH status, and lead-free/halogen-free attributes were not stated in the retrieved data and must be confirmed on the official TI product page.
