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PT4302 - 2 Channel 1x/1.5x Auto-Adjust Charge Pump White LED Driver

General Description

The PT4302 is a 2-channel 1×/1.5× auto-adjust charge pump white LED driver with LED fault detection.

The auto-adjust charge pump achieves high efficiency for an Li-lion battery supply.

LED fault detection feature allows the PT4302 to be self-adjusted to normal operation if an open or short occurs.

Key Features

  • z 2.7V-5.5V input range z 1x/1.5x auto-adjust charge pump z LED fault detection z Programmable 8 level LED currents from 3mA to 25mA z < ±2% LED maximum current mismatch between channels z Less than 1µA shut down current z Built-in soft-start and mode soft-switching z Miniature MSOP-10 and QFN-10 package.

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Datasheet Details

Part number PT4302
Manufacturer Powtech
File Size 196.62 KB
Description 2 Channel 1x/1.5x Auto-Adjust Charge Pump White LED Driver
Datasheet download datasheet PT4302 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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PT4302 2 Channel 1×/1.5× Auto-Adjust Charge Pump White LED Driver GENERAL DESCRIPTION The PT4302 is a 2-channel 1×/1.5× auto-adjust charge pump white LED driver with LED fault detection. The auto-adjust charge pump achieves high efficiency for an Li-lion battery supply. LED fault detection feature allows the PT4302 to be self-adjusted to normal operation if an open or short occurs. The PT4302 needs few external components, which makes it an ideal choice for portable applications where a smaller board space is critical. The LED current is programmable from 3mA to 25mA in a 3mA step by applying digital codes at the EN/SET pin. A built-in soft-start circuit prevents a high inrush current from being drawn from the supply source during power on and 1×/1.5× mode switching.