UCC2894
- Low Output Jitter
- Soft-Stop Shutdown of MAIN and AUX
- Ideal for Active Clamp/Reset Forward, Flyback Converters
- Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
- Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
- 110-V Input Startup Regulator on UCC2891/3
- TrueDrive™ 2-A Sink, 2-A Source Outputs
- Accurate Line UV and Line OV Threshold
- Programmable Slope Compensation
- 1.0-MHz Synchronizable Oscillator
- Precise Programmable Maximum Duty Cycle
- Programmable Soft Start
- APPLICATIONS
- 150-W to 700-W SMPS
- High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
- Server, 48-V Telecom, Datacom
- High Power Adapter, LCD-TV and PDP-TV
The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.
The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.
The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.
Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F) | 2009/07/01 | |
| Application note | Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A) | 2020/01/27 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Application note | Method of Providing Hiccup Operation for UCC2897AEVM | 2009/08/27 | ||
| Application note | UCC2891 Active Clamp | 2003/12/22 | ||
| More literature | Seminar 1000 Topic 3 - Active Clamp and Reset Technique | 2001/02/15 | ||
| More literature | Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset | 2001/02/15 |
설계 및 개발
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PMP7391 — 380VDC 입력, 24V/170W 능동 클램프 순방향 레퍼런스 디자인
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| SOIC (D) | 16 | 옵션 보기 |
| TSSOP (PW) | 16 | 옵션 보기 |
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