LM5021
- Ultra Low Start-up Current (25 µA maximum)
- Current Mode Control
- Skip Cycle Mode for Low Standby Power
- Single Resistor Programmable Oscillator
- Synchronizable Oscillator
- Adjustable Soft-Start
- Integrated 0.7 A Peak Gate Driver
- Direct Opto-Coupler Interface
- Maximum Duty Cycle Limiting (80% for LM5021-1
or 50% for LM5021-2) - Slope Compensation (LM5021-1 Only)
- Under Voltage Lockout (UVLO) with Hysteresis
- Cycle-by-Cycle Over-Current Protection
- Hiccup Mode for Continuous Overload Protection
- Leading Edge Blanking of Current Sense Signal
- Packages: VSSOP-8 or PDIP-8
The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current-mode control. The LM5021 features include an ultra-low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8-pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM5021 AC-DC Current-Mode PWM Controller datasheet (Rev. E) | PDF | HTML | 2014/12/24 |
| Functional safety information | LM5021 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2022/09/12 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Technical article | Power Tips: Design considerations of high-voltage converters in a cascode MOSFET | PDF | HTML | 2015/11/03 | |
| Application note | AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A) | 2013/05/01 | ||
| User guide | Load Detecting Power Supply User Guide | 2012/01/27 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM5021-1 TINA-TI Transient Reference Design
LM5021-2 TINA-TI Transient Reference Design
많은 TI 레퍼런스 설계에는 LM5021이(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 |
|---|---|---|
| PDIP (P) | 8 | Ultra Librarian |
| VSSOP (DGK) | 8 | 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