Texas Instruments

LM3530 White LED Driver

Texas Instruments' high efficiency white LED driver with programmable ambient light sensing capability and I2C compatible interface

image of Texas Instruments' LM3530 White LED DriverNational Semiconductor's LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LED's. The 839 mA current limit and 2.7 V to 5.5 V input voltage range, makes the device a versatile backlight power source ideal for operation in portable applications. The LED current is adjustable from 0 mA to 29.5 mA via an I2C compatible interface. The 127 different current steps and eight different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

Features
  • Drives up to 11 LED's in series
  • 1000:1 dimming ratio
  • 90% efficiency
  • Programmable dual ambient light sensor inputs with internal ALS voltage setting resistors
  • I2C programmable logarithmic or linear brightness control
  • External PWM input for simple brightness adjustment
  • True shutdown isolation for LED's and ambient light sensors
  • Internal soft-start limits inrush current
  • Wide 2.7 V to 5.5 V input voltage range
  • 40 V over-voltage protection
  • 500 kHz fixed frequency operation
  • 839 mA peak current limit
  • Low profile 12-bump micro SMD package
Applications
  • Smartphone LCD backlighting
  • Personal navigation LCD backlighting
  • 2 to 11 series white LED backlit display power source

White LED Driver

이미지제조업체 부품 번호제품 요약내부 스위치출력 개수주문 가능 수량가격
IC LED DRV RGLTR PWM 12DSBGALM3530UME-40/NOPBIC LED DRV RGLTR PWM 12DSBGA있음1305 - 즉시$2,579.00세부 정보 보기
게시 날짜: 2011-01-24

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