전원 관리 LED 드라이버 조명 LED 드라이버

LM3431

활성

부스트 컨트롤러가 통합된 3채널 정전류 LED 드라이버

제품 상세 정보

Input voltage type DC/DC Topology Boost, Boost with Current Sink, Multi-Channel Vin (min) (V) 4.5 Vin (max) (V) 36 Vout (max) (V) 40 Vout (min) (V) 5.5 Iout (max) (A) 0.6 Iq (typ) (mA) 4 Features Adjustable Switch Frequency, Enable/Shutdown, Soft Start, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog, PWM Number of channels 3 Rating Catalog
Input voltage type DC/DC Topology Boost, Boost with Current Sink, Multi-Channel Vin (min) (V) 4.5 Vin (max) (V) 36 Vout (max) (V) 40 Vout (min) (V) 5.5 Iout (max) (A) 0.6 Iq (typ) (mA) 4 Features Adjustable Switch Frequency, Enable/Shutdown, Soft Start, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog, PWM Number of channels 3 Rating Catalog
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • LM3431Q/LM3431AQ are Automotive Grade Products that are AEC-Q100 Grade 1 Qualified (–40°C to 125°C operating junction temperature)
  • 3-Channel Programmable LED Current
  • High Accuracy Linear Current Regulation
  • Analog and Digital PWM Dimming Control
  • Up to 25kHz Dimming Frequency
  • >100:1 Contrast Ratio
  • Integrated Boost Controller
  • 5V-36V Input Voltage Range
  • Adjustable Switching Frequency up to 1MHz
  • LED Short and Open Protection
  • Selectable Fault Shutdown or Automatic Restart
  • Programmable Fault Delay
  • Programmable Cycle by Cycle Current Limit
  • Output Over Voltage Protection
  • No Audible Noise
  • Enable Pin
  • LED Over-Temperature Shutdown Input
  • Thermal Shutdown
  • TSSOP-28 Exposed Pad Package

All trademarks are the property of their respective owners.

  • LM3431Q/LM3431AQ are Automotive Grade Products that are AEC-Q100 Grade 1 Qualified (–40°C to 125°C operating junction temperature)
  • 3-Channel Programmable LED Current
  • High Accuracy Linear Current Regulation
  • Analog and Digital PWM Dimming Control
  • Up to 25kHz Dimming Frequency
  • >100:1 Contrast Ratio
  • Integrated Boost Controller
  • 5V-36V Input Voltage Range
  • Adjustable Switching Frequency up to 1MHz
  • LED Short and Open Protection
  • Selectable Fault Shutdown or Automatic Restart
  • Programmable Fault Delay
  • Programmable Cycle by Cycle Current Limit
  • Output Over Voltage Protection
  • No Audible Noise
  • Enable Pin
  • LED Over-Temperature Shutdown Input
  • Thermal Shutdown
  • TSSOP-28 Exposed Pad Package

All trademarks are the property of their respective owners.

The LM3431 is a 3-channel linear current controller combined with a boost switching controller ideal for driving LED backlight panels in space critical applications. The LM3431 drives 3 external NPN transistors or MOSFETs to deliver high accuracy constant current to 3 LED strings. Output current is adjustable to drive strings in excess of 200 mA. The LM3431 can be expanded to drive as many as 6 LED strings.

The boost controller drives an external NFET switch for step-up regulation from input voltages between 5V and 36V. The LM3431 features LED cathode feedback to minimize regulator headroom and optimize efficiency.

A DIM input pin controls LED brightness from analog or digital control signals. Dimming frequencies up to 25 kHz are possible with a contrast ratio of 100:1. Contrast ratios greater than 1000:1 are possible at lower dimming frequencies.

The LM3431 eliminates audible noise problems by maintaining constant output voltage regulation during LED dimming. Additional features include LED short and open protection, fault delay/error flag, cycle by cycle current limit, and thermal shutdown for both the IC and LED array. The enhanced LM3431A features reduced offset voltage for higher accuracy LED current.

The LM3431 is a 3-channel linear current controller combined with a boost switching controller ideal for driving LED backlight panels in space critical applications. The LM3431 drives 3 external NPN transistors or MOSFETs to deliver high accuracy constant current to 3 LED strings. Output current is adjustable to drive strings in excess of 200 mA. The LM3431 can be expanded to drive as many as 6 LED strings.

The boost controller drives an external NFET switch for step-up regulation from input voltages between 5V and 36V. The LM3431 features LED cathode feedback to minimize regulator headroom and optimize efficiency.

A DIM input pin controls LED brightness from analog or digital control signals. Dimming frequencies up to 25 kHz are possible with a contrast ratio of 100:1. Contrast ratios greater than 1000:1 are possible at lower dimming frequencies.

The LM3431 eliminates audible noise problems by maintaining constant output voltage regulation during LED dimming. Additional features include LED short and open protection, fault delay/error flag, cycle by cycle current limit, and thermal shutdown for both the IC and LED array. The enhanced LM3431A features reduced offset voltage for higher accuracy LED current.

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기술 자료

star =TI에서 선정한 이 제품의 인기 문서
검색된 결과가 없습니다. 검색어를 지우고 다시 시도하십시오.
6개 모두 보기
유형 직함 날짜
* Data sheet LM3431/31A/31Q/31AQ 3-Chan Constant Current LED Driver w/Integrated Boost Cntr datasheet (Rev. G) 2013/05/02
Selection guide Power Management Guide 2018 (Rev. R) 2018/06/25
White paper LED Drivers for Automotive Exterior Applications (Rev. B) 2018/03/27
Application note AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 2013/05/03
EVM User's guide AN-1764 LM3431 Evaluation Board (Rev. A) 2013/05/03
User guide CCFL to LED Conversion Power Supply User Guide 2012/01/27

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

계산 툴

LM3431MATHCAD-CALC — MathCAD용 LM3431 구성 요소 계산기

시뮬레이션 툴

PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®

TI용 PSpice®는 아날로그 회로의 기능을 평가하는 데 사용되는 설계 및 시뮬레이션 환경입니다. 완전한 기능을 갖춘 이 설계 및 시뮬레이션 제품군은 Cadence®의 아날로그 분석 엔진을 사용합니다. 무료로 제공되는 TI용 PSpice에는 아날로그 및 전력 포트폴리오뿐 아니라 아날로그 행동 모델에 이르기까지 업계에서 가장 방대한 모델 라이브러리 중 하나가 포함되어 있습니다.

TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
패키지 CAD 기호, 풋프린트 및 3D 모델
HTSSOP (PWP) 28 Ultra Librarian

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

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지원 및 교육

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