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ADP5520 - Backlight Driver

General Description

The ADP5520 is a versatile single-chip, white LED backlight driver with a user configurable I/O expander.

This device fits handset applications where the flip or slider section of the phone requires backlighting, I/O signaling and detecting, auxiliary LED lighting, and keypad functions.

Key Features

  • Efficient asynchronous boost converter for driving up to 6 white LEDs 2.7 V to 5.5 V input voltage range 128 programmable backlight LED current levels (30 mA maximum) Ambient light sensing with autonomous backlight adjustment Programmable backlight fade-in/fade-out times Programmable backlight dim and off times 8 configurable GPIO pins (input, output, up to 4 × 4 keypad) Up to 3 auxiliary LED current sinks (1 dedicated, 2 configurable) 64 programmable auxiliary LED current levels (14 mA maximum).

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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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10kΩ 10kΩ 2.2kΩ 2.2kΩ I/O I/O 07445-001 Data Sheet Backlight Driver with I/O Expander ADP5520 FEATURES Efficient asynchronous boost converter for driving up to 6 white LEDs 2.7 V to 5.