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YB1315 - High Efficiency Charge Pump White LED Driver

General Description

The YB1315 charge pump is designed to drive up to 5 white LEDs with regulated constant current in backlight display application.

The device can provide up to 25mA per LED for a total 5 channels.

Key Features

  • Voltage Input Range From 2.7V to 5.5V.
  • Drives From 3 to 5 LEDs at Up to 25mA.
  • Each Fractional Conversion Modes for High Conversion Efficiency, 1x and 1.5x 1MHz Internal Oscillator Thermal Protection Shutdown Output Short-circuit Current Limit and Over-Voltage Protection Under-Voltage Lockout with Hysteresis Automatic Soft-Start Reduces In-Rush Current.
  • 3mm x 3mm TQFN Package.

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Datasheet Details

Part number YB1315
Manufacturer YOBON TECHNOLOGIES
File Size 772.58 KB
Description High Efficiency Charge Pump White LED Driver
Datasheet download datasheet YB1315 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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Preliminary YB1315 High Efficiency Charge Pump White LED Driver Description The YB1315 charge pump is designed to drive up to 5 white LEDs with regulated constant current in backlight display application. The device can provide up to 25mA per LED for a total 5 channels. The output current can also be combined into one single channel with 125mA output current for flash-light applications. The input voltage ranges from 2.7V to 5.5V and is ideal for applications powered by a single Li-Ion or 3 to 4 NiCd, NiMH or Alkaline batteries. YB1315 monitors the power-supply input voltage and LED forward voltage and current, and does an automatic selection to a switching mode that is optimized for the power conversion efficiency as well as battery operating time.