TPS23881B
- IEEE 802.3bt PSE solution for PoE 2 Type 3 or Type 4 power over ethernet applications
- Eight independent PSE channels
- Resistor
selectable autonomous operation
- No external MCU required
- Compatible with TI’s FirmPSE system firmware
- SRAM Programmable memory
- Programmable power limiting accuracy ±2.5%
- 200mΩ current sense resistor
- Legacy PD capacitance measurement
- Selectable
2-pair or 4-pair port power allocations
- 15.4W, 30W, 45W, 60W, 75W or 90W
- Single and dual signature PD compatibility
- Dedicated 14-bit
integrating current ADC per port
- Noise immune MPS for DC disconnect
- 2% current sensing accuracy
- 1- or 3-bit fast port shutdown input
- Auto-class discovery and power measurement
- Inrush and operational foldback protection
- Flexible
processor controlled operating modes
- Auto, semi auto and manual / diagnostic
- Per port voltage monitoring and telemetry
- –40°C to +125°C temperature operation
- Ultra Low Alpha (ULA) packaging (TPS23881B1A)
The TPS23881B is an 8-channel power sourcing equipment (PSE) controller engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt standard. The eight individual power channels can be configured in any combination of 2-Pair (1-channel) or 4-Pair (2-channels) PoE Ports. The PSE controller can detect powered devices (PDs) that have a valid signature, complete mutual identification, and apply power.
The TPS23881B improves on the TPS2388 with reduced current sense resistors, selectable Autonomous operation, SRAM programmability, programmable power limiting, capacitance measurement, and compatibility with TI’s FirmPSE system firmware (see Device Comparison Table).
Programmable SRAM enables in-field firmware upgradability over I2C to ensure IEEE compliance and interoperability with the latest PoE enabled devices. Dedicated per port ADCs provide continuous port current monitoring and the ability to perform parallel classification measurements for faster port turn on times. A ±2.5% accurate programmable port power limit provides the ability to expand the maximum power sourced from 90W to upwards of 125W. The 200mΩ current sense resistor and external FET architecture allow designs to balance size, efficiency, thermal and solution cost requirements.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | TPS23881B Type-4 4-Pair 8-Channel PoE 2 PSE Controller with Autonomous Mode and 200 mΩ RSENSE datasheet (Rev. A) | PDF | HTML | 2025. 5. 8 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
BOOST-PSEMTHR8-097 — 8포트 PSE 시스템용 TPS23882 Type-3, 30W, 2페어 PSE 마더보드
- TPS23882 평가 시스템
- BOOST-PSEMTHR8-097: IEEE 802.3bt 지원 PoE PSE 애플리케이션용 마더보드(별도 판매)
- TPS23882EVM-008: (...)
TPS23881B1EVM-024 — TPS23881B 도터 카드
TPS23881B1EVM은 자율 모드를 지원하는 4페어, 타입 4, 8채널 PoE(Power-over-Ethernet) PSE인 TPS23881B를 평가용 부속 카드입니다. 부속 카드는 고전력 PSE 애플리케이션에 적합한 TPS23881B용 평가 및 참조 회로를 제공할 수 있습니다.
TPS23881B-DESIGN — TPS23881B Design Resources
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RTQ) | 56 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.