UCC24636
- Secondary-Side SR Controller Optimized for
5-V to 24-V Output Discontinuous/Transition Mode
Only Flyback Converters - Volt-Second Balance Control Enables Highest
Rectifier Efficiency - Compatible with PSR and SSR Flyback
Controllers - Ultra Low 110-µA Standby Current Consumption
- Auto-Detect Standby Mode Disables SR Switching
for Lower No-Load
Power Consumption - SR Turn-Off Independent of RDSON and Parasitic
Inductance - Operating Frequency Up to 130 kHz
- Wide VDD Range from 3.6 V to 28 V
- Adaptive Gate Drive Clamp
- Open and Short Pin Fault Protection
The UCC24636 SR is a compact, 6-pin secondary-side synchronous rectifier MOSFET controller and driver for high efficiency Flyback converters operating in Discontinuous (DCM) and Transition mode (TM). Unlike traditional SR controllers which measure the SR MOSFET drain voltage, UCC24636 implements a volt-second balance control method to determine the turn off transition of the SR MOSFET; hence, SR conduction time is independent of the MOSFET RDSON, parasitic inductance or ringing allowing flexibility to designers in component slelction and PCB layout. This control method enables maximum SR conduction time and highest rectifier efficiency for a given MOSFET.
The controller has built in intelligence to detect converter no load operation and automatically enters standby mode. While in standby mode, it disables the SR MOSFET and lowers its bias supply current to 110µA to further reduce overall system standby power consumption. The wide VDD operating range for the controller allows direct bias from the converter output for fixed or variable output voltage designs. This eliminates the need for an auxilliary winding on the main transformer, which simplifies the circuit design and reduces the cost.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | UCC24636 Synchronous Rectifier (SR) Controller With Ultra-Low Standby Current datasheet (Rev. A) | PDF | HTML | 2016/03/11 |
| White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 2024/04/30 | |
| Application note | UCC24630 and UCC24636 SR-Control Configurations Guide | 2017/12/18 | ||
| Application note | Design UCC28704 With UCC24636 (PSR+SR) | 2017/01/12 | ||
| Technical article | Biasing an SR controller IC in USB smartphone charging applications | PDF | HTML | 2016/12/08 | |
| Technical article | USB chargers then and now: Type-C meets energy efficiency standards | PDF | HTML | 2016/09/23 | |
| Analog Design Journal | Agency requirements for stand-by power consumption w/ offline and PoL converters | 2016/01/26 | ||
| EVM User's guide | Using the UCC24636EVM | 2016/01/08 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
UCC24636EVM — UCC24636 동기 정류기 부속 보드/평가 모듈
많은 TI 레퍼런스 설계에는 UCC24636이(가) 포함됩니다.
레퍼런스 디자인 선택 툴을 사용하여 애플리케이션 및 매개 변수에 가장 적합한 설계를 검토하고 식별할 수 있습니다.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| SOT-23 (DBV) | 6 | 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