LM3642
- 1.5-A High-Side Current Source for Single LED
- > 85% Efficiency in Torch Mode (at 100 mA) and
Flash Mode (at 1 A to 1.5 A) - Accurate Programmable Flash LED Current from
93 mA to 1.5 A - Accurate Programmable Torch LED Currents:
- 48.4 mA to 375 mA
- 24 mA to 187 mA (LT option)
- Small Solution Size: < 20 mm2
- Soft-Start Operation for Battery Protection
- Hardware Strobe Enable
- Synchronization Input for RF Power Amplifier
Pulse Events - VIN Flash Monitor Optimization
- 400-kHz I2C-Compatible Interface
- 0.5-mm Pitch, 9-Bump DSBGA
The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.
The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.
The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM3642 1.5-A Synchronous Boost LED Flash Driver With High-Side Current Source datasheet (Rev. H) | PDF | HTML | 2015/09/04 |
| Application note | No Boost Inductor Design with LM364x for Long-Time Focusing in Camera Module | PDF | HTML | 2022/02/16 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020/09/21 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Application note | LED Flash-Protection Features | 2017/08/23 | ||
| EVM User's guide | LM3642 Evaluation Board (Rev. A) | 2013/04/30 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM3642TL-LTEVM — LM3642 고압측 전류를 지원하는 1.5A 동기 부스트 LED 플래시 드라이버 평가 모듈 보드
1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board
The LM3642TL-LT is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)LM3642TLEVM — LM3642 고압측 전류를 지원하는 1.5A 동기 부스트 LED 플래시 드라이버 평가 모듈 보드
1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board
The LM3642TL is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)LM3642SW-LINUX — LM3642용 Linux 드라이버
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lm3642
Linux Source Files
The files (...)
LM3642 Unencrypted PSpice Transient Model Package (Rev. B)
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 (YZR) | 9 | 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.