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ET9378 - Constant frequency 1x/1.33x charge pump DC/DC converter

Description

The ET9378 is a low noise, constant frequency 1x/1.33x charge pump DC/DC converter for white LED applications.

The ET9378 is capable of driving up to eight channels of LEDs at preset 19mA per channel from a 3.3V to 5.5V input.

Features

  • VIN Range: 2.5V to 5.5V Fully Programmable Current with Single Wire.
  • 16 Current Levels Drives up to Eight Channels of LEDs Overcurrent and Overtemperature Protected No Inductors, Low Noise Operation Small .

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Datasheet preview – ET9378

Datasheet Details

Part number ET9378
Manufacturer Etek Microelectronics
File Size 150.80 KB
Description Constant frequency 1x/1.33x charge pump DC/DC converter
Datasheet download datasheet ET9378 Datasheet
Additional preview pages of the ET9378 datasheet.

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Full PDF Text Transcription

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General Description The ET9378 is a low noise, constant frequency 1x/1.33x charge pump DC/DC converter for white LED applications. The ET9378 is capable of driving up to eight channels of LEDs at preset 19mA per channel from a 3.3V to 5.5V input. Under the same conditions, when the charge pump is opened, its efficiency is 10% higher than the conventional 1.5X charge pump. The current sinks may be operated individually parallel for driving higher current LEDs. Only two 1μF flying capacitors and two small 1μF capacitors (at Vcc and Vout) make this part ideally suited for small, battery­powered applications. The serial digital input is used to enable, disable, and set current for each LED with 16 settings down to 1.2mA.
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