LM3554
- Input Voltage: 2.5 V to 5.5 V
- Programmable 4.5-V or 5-V Constant Output Voltage
- Dual High-Side Current Sources
- Grounded Cathode Allowing for Better Heat Sinking and LED Routing
- > 90% Efficiency
- Ultra-Small Solution Size: < 23 mm2
- Four Operating Modes: Torch, Flash, LED Indicator, and Voltage Output
- Accurate and Programmable LED Current from 37.5 mA to 1.2 A
- Hardware Flash and Torch Enable
- LED Thermal Sensing and Current Scaleback
- Software Selectable Input Voltage Monitor
- Programmable Flash Timeout
- Dual Synchronization Inputs for RF Power-Amplifier Pulse Events
- Open and Short LED Detection
- Active High Hardware Enable for Protection Against System Faults
- 400-kHz I2C-Compatible Interface
The LM3554 is a 2-MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.
The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.
Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.
For all available packages, see the orderable addendum at the end of the data sheet.기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | LM3554 Synchronous Boost Converter With 1.2-A Dual High-Side LED Drivers and I2C-Compatible Interface datasheet (Rev. C) | PDF | HTML | 2016/02/26 |
White paper | Common LED Functions and LED Driver Design Considerations | 2020/09/21 | ||
Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
User guide | AN-1742 LM3554 Evaluation Board (Rev. B) | 2013/07/23 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM3554TMEEV — LM3554용 평가 보드
Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C-Compatible Interface
LM355XSW-LINUX — LM355X용 리눅스 드라이버
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lm3554
- lm3556
Linux Source Files
(...)
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 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
DSBGA (YFQ) | 16 | 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
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.