Микросхемы и комплектующие LT3965EFE-1#PBF

Драйвер светодиода , 8 выходов, повышающий, понижающий, понижающий-повышающий, 8В до 60В вход, 2.5МГц

The LT3965EFE-1#PBF from Linear Technology is an 8-switch matrix LED dimmer by a boost-buck LED driver in 28 pin plastic TSSOP package. It is a LED bypass switching device for dimming individual LEDs in a string using a common current source. It features eight individually controlled floating source 17V/330mohm NMOS switches. The eight switches can be connected in parallel and/or in series to bypass current around one or more LEDs in a string. The LT3965-1 is initialized with all switches on (LEDs off), it uses the I2C serial interface to communicate with the microcontroller. Each of the eight channels can be independently programmed to bypass the LED string in constant on or off or PWM dimming with or without fade transition. Using the fade option provides 11bit resolution logarithmic transition between PWM dimming states. It is used in automotive LED headlight clusters, large LED displays, automated camera flash equipment and RGBW colour mixing lighting.

• VDD range from 2.7V to 5.5V and VIN range from 8V to 60V
• Digital programmable 256:1 PWM dimming, fade transition between PWM dimming states
• Independent on
• off
• dimming control of 1 to 4 LEDs for each switch
• Optional internal clock generator or external clock source for PWM dimming
• I2C multidrop serial interface with programmable open LED and shorted LED fault reporting
• 16 unique I2C addresses
• Open LED overvoltage protection and flicker free PWM dimming
• Operating junction temperature range from -40°C to 125°C

• Output voltage of 26V, output current of 500mA
• Switching frequency of 2.5MHz

Области применения

Управление Питанием Market demand for this product has caused an extension in lead times, delivery dates may fluctuate