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BCT3258 - 8 Channel Constant Current LED Driver

General Description

The BCT3258 is a high performance constant current white LED driver.

The BCT3258 uses an internal resistor to set the bias current for 8 LEDs, which are matched to 3%.

Key Features

  • Low 50mV Dropout at 20mA.

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Datasheet Details

Part number BCT3258
Manufacturer BROADCHIP
File Size 337.86 KB
Description 8 Channel Constant Current LED Driver
Datasheet download datasheet BCT3258 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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August , 2012, REV2.1 BCT3258 8 Channel Constant Current LED Driver Low Dropout Current Sink General Description The BCT3258 is a high performance constant current white LED driver. The BCT3258 uses an internal resistor to set the bias current for 8 LEDs, which are matched to 3%. The BCT3258's advantages over ballast resistors include much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency. The BCT3258 requires only a 50mV dropout voltage at a 20mA load on each output to match the LED brightness. Users can easily configure the LED current from 1.25mA to 20mA by a serial pulse interface. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN pin.