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LN5925 - Constant-Current White LED Bias

Description

The LN5925 is a high performance ultra low- dropout constant current bias supply for white LEDs.

It can be used as an alternative to the simple ballast resistors in conventional parallel white LEDs applications.

Features

  • Ultra low 60mV dropout at 20mA.
  • 3% high accuracy current matching.
  • 20mA full scale current.
  • 16 Level linear current brightness control.
  • PWM brightness control.
  • 2.5V to 5.5V supply voltage range.
  • Thermal shutdown function.
  • Under-voltage protection function.
  • Package.
  • QFN3×3-16.
  • DFN2×2-8.
  • SOT-23-8 Function Denotes Package Type: SOT-23-8 Denotes Package Type:QFN3×3-16 Denotes Package Type:DFN2×2-8 Customer requirements Embossed Tape :Standard Fe.

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Datasheet Details

Part number LN5925
Manufacturer
File Size 451.61 KB
Description Constant-Current White LED Bias
Datasheet download datasheet LN5925 Datasheet

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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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Ultra Low-Dropout, Constant-Current White LED Bias LN5925 ■ General Description The LN5925 is a high performance ultra low- dropout constant current bias supply for white LEDs. It can be used as an alternative to the simple ballast resistors in conventional parallel white LEDs applications. For dimming control, an enable input pin is controlled by processor GPIO output pulses for 16 level linear current. Using a low frequency PWM waveform to this enable input pin also controls the average LED current which is proportional to the PWM duty. The LN5925 is suitable for single cell Li-ion battery power device that using low forward voltage white LEDs. The white LEDs can be powered directly from battery without extra external components.
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