TPS23757
- Powers up to 13 W (Input) PDs
- Legacy and IEEE 802.3at Type 1 PDs
- Optimized for Isolated DC/DC Converters
- Supports High-Efficiency Topologies
- Complete PoE Interface
- Adapter ORing Support
- Programmable Frequency with Synch.
- Robust 100 V, 0.5 Ω Hotswap MOSFET
- Pin Compatible with TPS23754/6
- –40°C to 125°C Junction Temperature Range
- Industry Standard TSSOP-20
The TPS23757 is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode dc/dc controller optimized specifically for isolated converters. The PoE interface supports the IEEE 802.3at standard for a type 1 PD, which is equivalent to the 13W standard of IEEE 802.3-2008.
The TPS23757 supports a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference.
The TPS23757 has an output flag indicating if an external wall adapter is active when used in conjunction with ORing controls. The detection signature pin can also be used to force power from the PoE source off. Classification can be programmed to any of the defined types with a single resistor.
The dc/dc controller features two complementary gate drivers with programmable dead time. This simplifies design of highly-efficient flyback topologies or active-clamp forward or flyback converters. The second gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal softstart, bootstrap startup source, current-mode compensation, and a 78% maximum duty cycle. A programmable and synchronizable oscillator allows design optimization for efficiency and eases use of the controller to upgrade existing power supply designs. Accurate programmable blanking, with a default period, simplifies the usual current- sense filter design trade-offs.
The TPS23757 has a 9 V converter startup, permitting operation with 12 V wall adapters.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | High Efficiency PoE Interface and DC/DC Controller datasheet (Rev. D) | 2013. 11. 20 | ||
| 애플리케이션 노트 | PoE Powered Devices Debug Guidelines | PDF | HTML | 2021. 7. 19 | ||
| 애플리케이션 노트 | PoE PD Schematic Review Guidelines | PDF | HTML | 2021. 4. 29 | ||
| 선택 가이드 | Power Management Guide 2018 (Rev. R) | 2018. 6. 25 | |||
| 애플리케이션 노트 | Lightning Surge Considerations for PoE Powered Devices | 2015. 4. 30 | |||
| 애플리케이션 노트 | Implementing a Buck Converter With the TPS23753A | 2010. 9. 20 | |||
| 애플리케이션 노트 | Using the TPS23753A with an External Error Amplifier | 2010. 8. 6 | |||
| 애플리케이션 노트 | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 2009. 2. 9 | |||
| 애플리케이션 노트 | PoE Powered Device for 24 VAC Building Power Applications | 2008. 9. 10 | |||
| 애플리케이션 노트 | Designing an EMI Compliant PoE with Isolated Flyback | 2008. 5. 20 | |||
| 애플리케이션 노트 | Practical Guidelines EMI Compliant PoE | 2008. 3. 27 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
TPS23757EVM — TPS23757용 22-57 Vin, 5 Vout 고효율 PoE 인터페이스 및 DC/DC 컨트롤러 평가 모듈
The TPS23757EVM contains evaluation and reference circuitry for the TPS23757. The TPS23757 contains a powered device (PD) and a power supply controller supporting many high-efficiency topologies. The TPS23757EVM supports the IEEE 802.3at (draft) standard for a type 1 PD (equivalent to the 13W (...)
SLUC480 — PoE PD Efficiency Calculator
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.