TPS23755
- Complete IEEE 802.3at PD solution for type 1 PoE
- Ethernet Alliance (EA) logo certified designs available
- Robust 100-V, 0.36-Ω (typ) hotswap MOSFET
- Programmable classification level
- Integrated PWM controller with 0.77-Ω (typ) 150-V power MOSFET
- Flyback controller with PSR
- Supports CCM operation with secondary side diode rectifier
- ±3% (typ, 12-V Output) Load regulation (5%-100% range)
- Supports low-side switch buck topology
- Adjustable switching frequency with synchronization
- advanced startup
- Programmable slew rate and frequency dithering for enhanced EMI reduction
- Flyback controller with PSR
- Secondary side adapter priority control with smooth transition
- –40°C to 125°C Junction temperature range
- Small 6-mm x 4-mm VSON package
The TPS23755 device combines a Power over Ethernet (PoE) powered device (PD) interface, a 150-V switching power FET, and a current-mode DC-DC controller optimized for flyback topology. The high level of integration along with primary side regulation (PSR), spread spectrum frequency dithering (SSFD), and advanced startup makes the TPS23755 an ideal solution for size-constrained applications. The PoE implementation supports the IEEE 802.3at standard as a 13-W, Type 1 PD.
The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for operation with secondary side diode rectifier (typically 12-V output or higher). Typically, the converter operates in continuous conduction mode (CCM) at a switching frequency of 250 kHz.
SFFD and slew rate control helps to minimize the size and cost of the EMI filter. Advanced Startup allows the use of minimal bias capacitor while simplifying converter startup and hiccup design.
Secondary auxiliary power detect capability provides priority for a secondary side power adapter, while ensuring smooth transition to and from PoE input power, with no efficiency or thermal trade-off.
The DC-DC controller features internal soft-start, slope compensation, and blanking. For non-isolated applications, the buck topology is also supported by the TPS23755.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TPS23755 IEEE 802.3at PoE PD with No-Opto Flyback DC-DC Controller datasheet (Rev. B) | PDF | HTML | 2020/11/25 |
| Application note | PoE Powered Devices Debug Guidelines | PDF | HTML | 2021/07/19 | |
| Application note | PoE PD Schematic Review Guidelines | PDF | HTML | 2021/04/29 | |
| EVM User's guide | TPS23755EVM-894 Evaluation Module (Rev. A) | PDF | HTML | 2020/12/14 | |
| Technical article | How to reduce the size of your 13-W PoE PD solution | PDF | HTML | 2019/06/25 | |
| Application note | Lightning Surge Considerations for PoE Powered Devices | 2015/04/30 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 2009/02/09 | ||
| Application note | Designing an EMI Compliant PoE with Isolated Flyback | 2008/05/20 | ||
| Application note | Practical Guidelines EMI Compliant PoE | 2008/03/27 |
설계 및 개발
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TPS23755EVM-894 — IEEE802.3at Type 1 PoE PD 애플리케이션용 TPS23755 평가 모듈
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TIDA-010046 — IEEE802.3at Type-1(≤ 12.95 W) PoE-PD를 지원하는 EMC 준수 10/100Mbps 이더넷 PHY 레퍼런스 설계
TIDA-010034 — 부하 지점의 IEEE802.3at Type-1 PoE 및 12V 어댑터 입력에 대한 IP 네트워크 카메라용 레퍼런스 설계
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VSON (RJJ) | 23 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
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