LM3444
- Application Voltage Range: 80 VAC to 277 VAC
- Capable of Controlling LED Currents
Greater than 1 A - Adjustable Switching Frequency
- Low Quiescent Current
- Adaptive Programmable Off-Time Allows for
Constant Ripple Current - Thermal Shutdown
- No Flicker at 120 Hz
- Low-Profile 10-Pin VSSOP Package
or 8-Lead SOIC Package - Patented Drive Architecture
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC undervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.
기술 자료
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10개 모두 보기
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM3444 AC-DC Offline LED Driver datasheet (Rev. D) | PDF | HTML | 2015. 12. 31 | |
| 백서 | Common LED Functions and LED Driver Design Considerations | 2020. 9. 21 | |||
| 선택 가이드 | Power Management Guide 2018 (Rev. R) | 2018. 6. 25 | |||
| 애플리케이션 노트 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013. 5. 3 | |||
| 애플리케이션 노트 | AN-2097 LM3444 - 230VAC, 8W Isolated Flyback LED Driver (Rev. F) | 2013. 5. 1 | |||
| 애플리케이션 노트 | AN-2082 LM3444 -120VAC, 8W Isolated Flyback LED Driver (Rev. E) | 2013. 5. 1 | |||
| 사용 설명서 | AN-2083 LM3444 A19 Edison Retrofit Evaluation Board (Rev. C) | 2013. 5. 1 | |||
| 애플리케이션 노트 | An Improved Line Regulation Solution Used in LM3444/5 Non-Isolated LED Lighting | 2012. 10. 25 | |||
| 사용 설명서 | LM3444 MR16 Buck-Boost Reference Design (Rev. A) | 2012. 2. 17 | |||
| 사용 설명서 | LM3444 MR16 Boost Reference Design User Guide (Rev. A) | 2012. 2. 13 |
설계 및 개발
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |