UC3879
- Programmable Output Turn On Delay; Zero Delay Available
- Compatible with Voltage Mode or Current Mode Topologies
- Practical Operation at Switching Frequencies to 300 kHz
- 10-MHz Error Amplifier
- Pin Programmable Undervoltage Lockout
- Low Startup Current — 150 µA
- Soft Start Control
- Outputs Active Low During UVLO
The UC3879 controls a bridge power stage by phase shifting the switching of one half-bridge with respect to the other. This allows constant frequency pulse width modulation in combination with resonant, zero-voltage switching for high efficiency performance. The UC3879 can be configured to provide control in either voltage mode or current mode operation, with overcurrent shutdown for fast fault protection.
Independently programmable time delays provide dead-time at the turn-on of each output stage, allowing time for each resonant switching interval.
With the oscillator capable of operating in excess of 600 kHz, overall output switching frequencies to 300 kHz are practical. In addition to the standard free running mode, with the CLKSYNC pin, the user may configure the UC3879 to accept an external clock synchronization signal. Alternatively, up to three units can be locked together with the operational frequency determined by the fastest device.
Protective features include an undervoltage lockout and overcurrent protection. Additional features include a 10-MHz error amplifier, a 5-V precision reference, and soft start. The UC3879 is available in 20 pin N, J, DW, and Q and 28 pin L packages.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | Phase Shift Resonant Controller datasheet (Rev. B) | 2006/12/13 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Application note | Phase Shifted Full Bridge, Zero Voltage Transition Design Considerations (Rev. A) | 2011/01/22 | ||
| Application note | Current Doubler Rectifier Offers Ripple Current Cancellation | 2004/09/21 | ||
| Application note | Synchronous Rectifiers of a Current Doubler | 2003/02/27 | ||
| Application note | A Comparison Between the BiCMOS UCC3895 Phase Shift Controller and the UC3875 | 2001/02/22 | ||
| Application note | DN-63 The Current-Doubler Rectifier: An Alternative Rectification Technique | 2001/01/12 | ||
| Application note | U-154 The New UC3879 Phase-Shifted PWM Controller Simplifies the Design | 1999/09/05 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
UCC3895EVM-001 — UCC3895 평가 모듈
The UCC3895EVM-001 is an isolated 48V input phase shifted full bridge converter providing an output of 3.3V at 15A. Using the AB outputs of the UCC3895, a novel technique for direct control driven synchronous rectification is demonstrated.
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| PDIP (N) | 20 | 옵션 보기 |
| SOIC (DW) | 20 | 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