LM3405
- VIN Operating Range of 3 V to 15 V
- Drives up to 5 High-Brightness LEDs in Series at 1 A
- Thin SOT-6 Package
- 1.6-MHz Switching Frequency
- EN/DIM Input for Enabling and PWM Dimming of LEDs
- 300-mΩ NMOS Switch
- 40-nA Shutdown Current at VIN = 5 V
- Internally Compensated Current-mode Control
- Cycle-by-Cycle Current Limit
- Input Voltage UVLO
- Overcurrent Protection
- Thermal Shutdown
The LM3405 is a 1-A constant current buck LED driver designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as required for driving various types of LEDs. Switching frequency is internally set to 1.6 MHz, allowing small surface mount inductors and capacitors to be used. The LM3405 uses current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 15 V, the device can drive up to 3 High-Brightness LEDs in series at 1-A forward current, with the single LED forward voltage of approximately 3.7 V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and overcurrent protection.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM3405 1.6-MHz, 1-A Constant Current Buck Regulator For Powering LEDS datasheet (Rev. C) | PDF | HTML | 2016/12/23 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020/09/21 | ||
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/05/03 | ||
| EVM User's guide | AN-1590 LM3405 Demo Board (Rev. A) | 2013/05/01 | ||
| User guide | AN-1685 LM3405A Demo Board (Rev. B) | 2013/05/01 | ||
| Application note | Powering & Dimming High-Brightness LEDs w/ LM3405 Constant-Current Buck Reg (Rev. A) | 2013/05/01 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013/04/23 |
설계 및 개발
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LM3405XEVAL — LED 전원 공급을 위한 1.6MHz, 1A 정전류 벅 레귤레이터
The LM3405 demo board is configured to drive a series string of high power, high brightness LEDs at a forward current of 1A using the LM3405 constant current buck regulator. The board can accept a full input operating range of 3V to 15V. The converter output voltage adjusts as needed to maintain a (...)
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 (...)
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| SOT-23-THN (DDC) | 6 | 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
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.