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CAT3643 - 3-Channel Ultra High Efficiency LED Driver

General Description

The CAT3643 is a high efficiency fractional charge pump that can drive up to three LEDs programmable by a one wire digital interface.

The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.

Key Features

  • High Efficiency 1.33x Cha.

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Datasheet Details

Part number CAT3643
Manufacturer onsemi
File Size 199.94 KB
Description 3-Channel Ultra High Efficiency LED Driver
Datasheet download datasheet CAT3643 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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CAT3643 3-Channel Ultra High Efficiency LED Driver Description The CAT3643 is a high efficiency fractional charge pump that can drive up to three LEDs programmable by a one wire digital interface. The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors. Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi−fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V. The EN/DIM logic input functions as a chip enable and a digital dimming interface for current setting of all LEDs. Six different current ratios are available via the interface.