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BCT3258 - 8 Channel Constant Current LED Driver

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%.

Features

  • Low 50mV Dropout at 20mA.

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Datasheet preview – BCT3258

Datasheet Details

Part number BCT3258
Manufacturer BROADCHIP
File Size 337.86 KB
Description 8 Channel Constant Current LED Driver
Datasheet download datasheet BCT3258 Datasheet
Additional preview pages of the BCT3258 datasheet.

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Full PDF Text Transcription

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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.
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