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RT9378 - 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver

General Description

The RT9378 is a 4 CH WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources.

The RT9378 can power up to 4 white LEDs with regulated constant current for uniform intensity.

Each channel (LED1 to LED4) can support up to 25mA.

Key Features

  • z Efficiency Up to 93% Over Li-ion Battery Discharge z Typical 85% Average Efficiency Over Li-ion Battery Discharge z Support Up to 4 White LEDs z Support Up to 25mA/Per Channel z Support Up to 100mA Output Current z PWM Brightness Control z 60mV Typical Current Source Dropout z 1% Typical LED Current Accuracy z 0.7% Typical LED Current Matching z Automatic x1/x1.5/x2 Charge Pump Mode Transition z Low Input Noise and EMI Charge Pump z 5V Over Voltage Protection z Power On/Mode Transition In-rush.

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Datasheet Details

Part number RT9378
Manufacturer Richtek
File Size 211.18 KB
Description 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver
Datasheet download datasheet RT9378 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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® RT9378 4 CHs 100mA x1/x1.5/x2 Charge Pump White LED Driver General Description The RT9378 is a 4 CH WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9378 can power up to 4 white LEDs with regulated constant current for uniform intensity. Each channel (LED1 to LED4) can support up to 25mA. The part maintains highest efficiency by utilizing x1/x1.5/ x2 fractional charge pump and low dropout current regulators. For the brightness control, user can easily use a PWM signal generated from GPIO to control the brightness of WLEDs. The RT9378 is available in a WQFN-12L 2x2 package. Small 0.22μF capacitors can be used for fly capacitors.