HPA00776PWPR - PoE Interface & DC-DC Controller 802.3at | TI
N.º de pieza: HPA00776PWPR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.85 | $38,50 |
| 100 | $3.4 | $340,00 |
| 500 | $3.05 | $1.525,00 |
| 1.000 | $2.75 | $2.750,00 |
HPA00776PWPR Descripción general
A PoE PD interface controller is a power-management IC that performs powered-device detection, classification, and inrush-current limiting while an integrated converter stage turns the extracted 48V rail into a usable system voltage. In the power management hierarchy it sits above discrete MOSFET hot-swap controllers and beside dedicated DC-DC controllers, combining PoE front-end functions and isolated or non-isolated converter control in one silicon solution.
Key features include IEEE 802.3at high-power compliance for up to 25.5W-class PD designs, a high-efficiency converter controller topology that supports flyback and forward power supplies, an automotive temperature grade of -40C to +125C, and a thermally enhanced 20-terminal HTSSOP with 0.65 mm terminal pitch for compact, surface-mount layouts.
Technically, the device separates the PoE interface section from the converter controller section while coordinating them through internal control logic: the interface handles detection, classification, and inrush management, and the controller then enables the external power stage for regulated conversion. Designers typically pair it with an external MOSFET, transformer, and optocoupler feedback to build isolated 12V or 5V PD outputs.
Typical applications include IEEE 802.3at PoE powered devices such as IP surveillance cameras, wireless access points, VoIP phones, and networked industrial equipment where a single Ethernet cable must deliver both data and power.
A key design consideration is thermal budgeting: at full 802.3at power levels, the external bridge MOSFETs and sense elements dominate dissipation, so the HTSSOP power pad must land on a solid copper pour.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para HPA00776PWPR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS23754PWPR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS23755PWPR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
HPA00776PWPR Valores máximos y características eléctricas
| Función | PoE Interface and DC-DC Controller |
| PoE Standard | IEEE 802.3at |
| Maximum Switching Frequency | 278 kHz |
| Maximum Output Current (controller) | 1.1 A |
| Rango de temperatura de funcionamiento | -40C to +125C |
| Temperature Grade | Automotive |
| Encapsulado | 20-HTSSOP (PW) |
| Number of Terminals | 20 |
| Terminal Pitch | 0.65 mm |
| Tipo de montaje | Surface Mount |
| Package Shape | Rectangular |
| Application | Power over Ethernet (PoE) Powered Device |
Guía de configuración de pines de HPA00776PWPR rectangular
Configuración de pines para HPA00776PWPR (encapsulado rectangular). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para HPA00776PWPR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
HPA00776PWPR es adecuado para 6 aplicacións: IP Surveillance Cameras, Wireless Access Points, VoIP Phones and Conferencing Hardware, Industrial Network Nodes and Automation Equipment, Building Automation and Access Control, Networked LED Lighting and PoE Lighting Drivers.
IP Surveillance Cameras
IEEE 802.3at PoE IP cameras draw power and data over one Ethernet cable, and the HPA00776PWPR integrates the powered-device interface (detection, classification, inrush limiting) with a DC-DC converter controller in a single 20-HTSSOP device, minimizing board area behind the RJ45 magnetics. The 802.3at power class supports camera subsystems including IR illuminator arrays, motorized zoom lenses, heaters, and the main SoC rail. The converter controller typically drives a flyback stage producing a 12V intermediate bus with optocoupler feedback, with the 278 kHz maximum switching frequency keeping the transformer compact. The -40C to +125C automotive temperature range covers outdoor and cold-storage enclosures, and the thermally enhanced power pad simplifies heat removal in sealed camera housings where airflow is unavailable.
Recomendado
Wireless Access Points
Enterprise 802.11ac/ax wireless access points are classic IEEE 802.3at powered devices, since multi-radio designs exceed the 12.95 W 802.3af class. The HPA00776PWPR classifies the PD at the high-power class and then enables a converter stage - typically an isolated forward or active-clamp flyback generating a 12V rail that feeds radio PA and digital point-of-load regulators. Its integrated controller removes the sequencing handoff between the PoE interface and the converter, a common failure point in discrete two-chip designs. The 278 kHz maximum switching frequency allows a small planar transformer suited to slim ceiling-mount housings, and the 20-HTSSOP exposed pad dissipates interface-section heat into the ground pour. The -40C to +125C range supports outdoor and rooftop installations.
Recomendado
VoIP Phones and Conferencing Hardware
PoE VoIP desk phones and conference endpoints use the HPA00776PWPR to draw power from the desk Ethernet drop, eliminating wall adapters. The device performs detection and classification on cable insertion, limits inrush into the bulk capacitor, and then releases the converter controller to generate the phone's internal rails - commonly an isolated or non-isolated flyback producing 5V or 12V, followed by low-noise LDOs for the audio codec section. Integration of interface and converter control in one 20-HTSSOP package reduces BOM count, which matters at the price points of volume telephony hardware. The 278 kHz switching ceiling keeps magnetics and EMI filtering small enough to fit handset footprints while meeting CISPR-class conducted emission budgets in the analog voice path.
Recomendado
Industrial Network Nodes and Automation Equipment
Industrial Ethernet nodes - remote I/O, sensors, and edge controllers - increasingly adopt PoE to eliminate separate power wiring in dense cabinets. The HPA00776PWPR suits this environment because its -40C to +125C automotive temperature grade tolerates unconditioned electrical cabinets, and the integrated IEEE 802.3at interface handles long-cable installations reliably. The converter controller supports flyback and forward topologies, letting designers generate an isolated 24V or 12V industrial bus from the PoE input, then derive 5V and 3.3V logic rails downstream. Its 1.1 A controller drive rating and 278 kHz maximum switching frequency support compact magnetics on DIN-rail-format boards. The 20-HTSSOP power pad on a solid ground pour provides the thermal path needed in sealed, fanless industrial enclosures.
Recomendado
Building Automation and Access Control
Door controllers, card readers, and HVAC network controllers benefit from PoE because Ethernet cabling already reaches most access points in a building. The HPA00776PWPR provides the IEEE 802.3at powered-device interface and the converter control needed to build a 12V actuator rail capable of driving electric strikes and relays, with the integrated detection and inrush limiting ensuring compliant handshaking on long cable runs. Its high-efficiency controller topology minimizes standby losses - important because access hardware must meet local energy codes at idle. The -40C to +125C range covers rooftop and exterior door installations, and the compact 20-terminal HTSSOP with 0.65 mm pitch fits the small PCBs typical of reader electronics mounted behind wall plates.
Recomendado
Networked LED Lighting and PoE Lighting Drivers
PoE LED luminaires use structured Ethernet cabling for both control and power, and the HPA00776PWPR can serve as the front end that classifies the luminaire at the 802.3at class and controls a converter stage producing a regulated LED bus. The high-efficiency switching controller minimizes heat inside enclosed fixture housings, where derating is the dominant reliability constraint; the exposed-pad HTSSOP package helps transfer interface-section dissipation into the fixture's metal structure. The -40C to +125C operating range accommodates driver electronics mounted near the LED thermal mass, and the 278 kHz maximum switching frequency supports compact inductor and transformer choices that fit slim troffer and track-light form factors while keeping audible-noise-inducing frequencies out of range.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para HPA00776PWPR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS23754PWPR | TPS23755PWPR |
|---|---|---|---|
| Package | 20-HTSSOP (PW) | 20-HTSSOP (PW) - same | 20-HTSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| PoE Standard | IEEE 802.3at | IEEE 802.3at | IEEE 802.3at |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C |
| Auxiliary Supply Control | Converter controller (TPS23754 arrangement) | Identical arrangement | Secondary-side regulation variant |
| MPN Relationship | HPA internal designation | Official catalog MPN (same die) | Adjacent family member |
Diferenciadores clave
- Single-chip integration of PoE PD interface and converter controller (frente a Discrete PD controller + separate PWM controller two-chip solutions)
- Automotive-grade temperature range (frente a Consumer-grade PoE PD controllers limited to 0C to +70C or 85C)
- High-efficiency converter control with 278 kHz capability (frente a TPS23755PWPR (different auxiliary control arrangement))
Notas de diseño
The 20-HTSSOP (PW) package includes an exposed power pad that must be soldered to a grounded copper pour - a minimum of several square centimeters of 2 oz copper is a common starting point for 802.3at-class designs. Estimated: at 25.5 W PoE input and ~88% converter efficiency, roughly 3 W is dissipated across the PD interface MOSFETs and converter losses; verify junction temperature against the datasheet RthJA with your specific pour geometry, since the pour area directly sets thermal performance in sealed camera and luminaire housings.
Do not substitute the TPS23755PWPR without checking the auxiliary supply regulation scheme: the TPS23754/HPA00776 uses one control arrangement and the TPS23755 a different secondary-side arrangement, so an optocoupler feedback loop designed for one will not regulate correctly on the other. Also ensure the bulk capacitor after the diode bridge respects the PoE inrush current profile - oversized input capacitance can trip the inrush limiter during classification-to-power-up transition, causing repeated startup failures.
Place the RJ45 magnetics, bridge rectifier, and the HPA00776PWPR PD interface pins on a short, wide thermal path, and keep the converter power loop (transformer primary, switch MOSFET, sense resistor) physically separate from the detection/classification circuitry to prevent switching noise from disturbing the PD signature. Use Kelvin sensing at the current-sense resistor for the converter controller, and reserve space for a Y-capacitor bridging primary and secondary grounds for EMI compliance in isolated flyback designs.
Información de cumplimiento
The retrieved distributor data does not state RoHS/REACH status for HPA00776PWPR; the 'automotive temperature grade' designation refers to the -40C to +125C operating range, not AEC-Q100 qualification. Verify compliance on the TI product page for TPS23754PWPR.
