LM3445
- TRIAC Dim Decoder Circuit for LED Dimming
- 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 120-Hz Flicker
- Low Profile 10-Pin VSSOP Package or 14-Pin
SOIC - Patented Drive Architecture
The LM3445 is an adaptive constant off-time AC/DC buck (step-down) constant current controller designed to be compatible with TRIAC dimmers. The LM3445 provides a constant current for illuminating high power LEDs and includes a TRIAC dim decoder. The dim decoder allows wide range LED dimming using standard TRIAC dimmers. The high frequency capable architecture allows the use of small external passive components. The LM3445 includes a bleeder circuit to ensure proper TRIAC operation by allowing current flow while the line voltage is low to enable proper firing of the TRIAC. 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 under-voltage lockout.
기술 문서
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM3445-120VFLBK — 120VFLBK-LM3445 120V 입력 절연 애플리케이션에 최적화된 평가 보드
This demonstration board highlights the performance of a LM3445 based Flyback LED driver solution that can be used to power a single LED string consisting of 4 to 8 series connected LEDs from an 90 VRMS to 135 VRMS, 60 Hz input power supply. The key performance characteristics under typical (...)
LM3445-EDSNEV — EDSNEV- 소형 솔루션 크기에 최적화된 10W, 비절연 LM3445 평가 보드
The evaluation board included in this shipment converts 85VAC to 135VAC input and drives five to thirteen series connected LED`s at the currents listed in the Evaluation Board Operating Conditions section. This is a two-layer board using the bottom and top layer for component placement. The board (...)
LM3445EVM-695 — LM3445 120Vac 밸리 필 벅 Triac 조광 가능 LED 드라이버 평가 모듈
The LM3445EVM-695 implements a dimming solution using the LM3445 integrated circuit from Texas Instruments. The LM3445 is an adaptive constant off-time AC/DC buck constant current controller with built in phase dimming decoder. Line cycles are analyzed continuously by an internal low power digital (...)
PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®
TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
PMP30439 — 200mA에서 230V 입력, 180V 출력의 정전류 LED 드라이버 레퍼런스 설계
패키지 | 핀 | 다운로드 |
---|---|---|
SOIC (D) | 14 | 옵션 보기 |
VSSOP (DGS) | 10 | 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