TPS23734
- Complete IEEE 802.3bt Type 3 (Class 1-4) and 802.3at PoE PD Solution
- EA Gen 2 Logo-Ready (PoE 2 PD Controller)
- Robust 100 V, 0.3 Ω (typ) Hotswap MOSFET
- Supports Power Levels for up to 30-W Operation
- Integrated PWM Controller for Flyback or Active Clamp Forward Configuration
- Flyback Control with Primary-Side Regulation
- Supports CCM Operation
- ±1.5% (typ, 5-V Output) Load Regulation (0-100% load range) — with Sync FET
- ±3% (typ, 12-V Output) Load Regulation (5-100% load range) — Diode Rectified
- Also supports secondary-side regulation
- Soft-Start Control with Advanced Startup and Hiccup Mode Overload Protection
- Soft-Stop Shutdown
- Adjustable Frequency with Synchronization
- Programmable Frequency Dithering for EMI
- Flyback Control with Primary-Side Regulation
- Automatic Maintain Power Signature (MPS)
- Auto-adjust to PSE Type and Load Current with Auto-stretch
- Primary Adapter Priority Input
- –40°C to 125°C Junction Temperature Range
The TPS23734 device combines a Power over Ethernet (PoE) powered device (PD) interface, and a current-mode DC-DC controller optimized for flyback and active clamp forward (ACF) switching regulator designs . In the case of flyback configuration, the use of primary-side regulation (PSR) is supported. The PoE interface supports the IEEE 802.3bt and IEEE 802.3at standard s for applications needing up to 25.5 W or less at PD input.
Programmable spread spectrum frequency dithering (SSFD) is provided to minimize the size and cost of EMI filter. Advanced Startup with adjustable soft-start helps to use minimal bias capacitor while simplifying converter startup and hiccup design, also ensuring that IEEE 802.3bt /at startup requirements are met.
The soft-stop feature minimizes stress on switching power FETs , allowing FET BOM cost reduction.
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 continuous conduction mode (CCM), and can work with secondary side synchronous rectification, resulting in optimum efficiency, regulation accuracy and step load response over multiple outputs.
The DC-DC controller features slope compensation and blanking. Typical switching frequency is 250 kHz.
The automatic MPS enables applications with low power modes or multiple power feeds. It automatically adjusts its pulsed current amplitude and duration according to PSE Type and system conditions, to maintain power while minimizing consumption.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 | |
|---|---|---|---|---|---|---|
| * | 데이터 시트 | TPS23734 IEEE 802.3bt Type 3 Class 1-4 PoE PD with High Efficiency DC-DC Controller datasheet (Rev. A) | PDF | HTML | 2020. 9. 21 | ||
| 애플리케이션 노트 | PoE Powered Devices Debug Guidelines | PDF | HTML | 2021. 7. 19 | |||
| 애플리케이션 노트 | PoE PD Schematic Review Guidelines | PDF | HTML | 2021. 4. 29 | |||
| 애플리케이션 노트 | Soft-Stop: TPS2373X Feature Explanation | PDF | HTML | 2020. 10. 27 | |||
| 인증서 | TPS23734EVM-094 EU Declaration of Conformity (DoC) | 2020. 5. 29 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
TPS23734EVM-094 — TPS23734 IEEE802.3bt 타입 3 클래스 4 PoE PD 애플리케이션 평가 모듈
PMP23278 — 클래스 4, PoE PD, 12V, 2.1A 액티브 클램프 순방향 컨버터 레퍼런스 설계
PMP23366 — 원활한 전환과 원격 측정을 지원하는 듀얼 입력 중복 PoE 클래스 6 PD 레퍼런스 설계
이 설계는 듀얼 중복 PoE 입력을 지원하고 이러한 입력과 보조 입력 간에 매끄러운 전환을 지원하는 PoE(Power over Ethernet) 클래스 6 PD(Power Device)를 구현합니다. 최대 51W의 고전력 PoE 제어에 TPS2372-3 PD 컨트롤러 2개가 사용됩니다. 9A 능동 클램프 순방향 컨버터에서 5V는 TPS23734 IC의 PWM 부분을 사용하여 구현됩니다. INA237A는 I2C를 통해 입력 전압/전류/전원/온도 측정을 제공합니다.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RMT) | 45 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.