LM3697
- Drives three parallel high-voltage led strings for display and keypad lighting
- High-voltage strings capable of up to 40-V output voltage and up to 90% efficiency
- Up to 30 mA per current sink
- 11-Bit configurable dimming resolution
- PWM input for content adjustable brightness control (CABC)
- Fully configurable LED grouping and control
- Integrated 1-A/40-V MOSFET
- Adaptive boost output to LED voltages
- Selectable 500-kHz and 1-MHz switching frequency
- Four configurable overvoltage protection thresholds (16 V, 24 V, 32 V, and 40 V)
- Overcurrent protection
- Thermal shutdown protection
- 29-mm2 Total solution size
The LM3697 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.
The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2, and HVLED3).
An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.
The LM3697 is fully configurable via an I2C-compatible interface. The device operates over a
2.7-V to 5.5-V input voltage range and a −40°C to +85°C temperature range.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | LM3697 High-efficiency three-string white LED driver datasheet (Rev. D) | PDF | HTML | 2019/03/27 |
Application note | How to use the LM3697 Device to Design a Backlight Unit in a Smartphone | PDF | HTML | 2021/04/15 | |
White paper | Common LED Functions and LED Driver Design Considerations | 2020/09/21 | ||
Application note | Analog PWM Dimming in White-LED Drivers | 2016/12/21 | ||
EVM User's guide | LM3697EVM User Guide | 2013/11/15 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM3697EVM — 스마트폰 핸드셋용 LM3697 3 스트링 백색 LED 드라이버용 평가 모듈
The LM3697 Evaluation Module (LM3697EVM) is designed to fully evaluate the LM3697 Three String backlight driver. The LM3697EVM consists of the LM3697, 3p10s white LED strings, level shifters and the USB2ANY interface. The Texas Instruments USB2ANY interface provides the hardware link (...)
LM3532SW-LINUX — LM3532용 Linux 드라이버
Linux Mainline Status
Available in Linux Main line: No
Available through git.ti.com: (...)
LM3697 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 (YFQ) | 12 | 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.