Регуляторы тока светодиодных ламп MAX1554ETA+T

Драйвер светодиода , повышающий, 3.15В - 5.5В вход, частота коммутации 10кГц, 970мА выход, TDFN-8

The MAX1554ETA+T is a high efficiency, 40V step-up converter for 2 to 10 white LEDs in 8 pin TDFN package. It drives white LEDs in series with a constant current to provide efficient display back lighting in cellular phones, PDAs and other hand held devices. The step-up converter includes an internal 40V, low RDSON, N-channel MOSFET switch for high efficiency and maximum battery life. It has a current limit of 970mA for driving up to 10 white LEDs. A single analogue /PWM Dual Mode input provides two simple means of brightness adjustment. A separate enable input provides on/off control and soft-start minimizes inrush current during start up.

• Supply voltage range is 3.15V to 5.5V
• Operating temperature range from -40°C to 85°C
• Highly integrated and flexible solution for wide range of backlighting applications
• Constant current regulation for even LED illumination
• Internal 40V MOSFET switch capable of driving 10 LEDs
• Analogue or PWM control of LED intensity
• Optimized for low Iinput ripple
• Small, low profile external components
• High efficiency improves Battery life, up to 88% efficiency driving 6 LEDs
• Up to 82% efficiency driving 9 LEDs (20mA, VCC = 3.6V)

Области применения

Управление Питанием, Переносные Устройства