UCC28250
- Prebiased Start-up
- Synchronous Rectifier Control Outputs With Programmable Delays (Including Zero Delay Support)
- Voltage Mode Control With Input Voltage Feed-Forward or Current Mode Control
- Primary or Secondary-Side Control
- 3.3-V, 1.5% Accurate Reference Output
- 1-MHz Capable Switching Frequency
- 1% Accurate Cycle-by-Cycle Overcurrent Protection with Matched Duty Cycle Outputs
- Programmable Soft-Start and Hiccup Restart Timer
- Thermally Enhanced 4-mm × 4-mm QFN-20 Package and 20-pin TSSOP Package
The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.
Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.
The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | UCC28250 Advanced PWM Controller With Prebias Operation datasheet (Rev. D) | PDF | HTML | 2015. 6. 28 | |
| 선택 가이드 | Power Management Guide 2018 (Rev. R) | 2018. 6. 25 | |||
| 애플리케이션 노트 | Differences Between the UCC28251 and UCC28250 and Evaluation of the UCC28251 in (Rev. A) | 2013. 2. 15 | |||
| 애플리케이션 노트 | Designing UCC28250 as a Secondary Side Control with a Pre-Bias Condition | 2010. 11. 24 |
설계 및 개발
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PMP8878 is a full-function 1/8th brick isolated DC/DC telecom power module based on UCC28250 advanced PWM controller. The reference design features secondary side control and hard switching full bridge power topology to deliver 12V/180W of output power operating across a wide range 40V-75V input (...)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
| VQFN (RGP) | 20 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.