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RT9378A - 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver

Description

The RT9378A is a 4 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources.

The RT9378A can power up to 4 white LEDs with regulated constant current for uniform intensity.

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

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 Flexible 16-step 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 Trans.

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Datasheet Details

Part number RT9378A
Manufacturer Richtek
File Size 186.29 KB
Description 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver
Datasheet download datasheet RT9378A Datasheet

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Full PDF Text Transcription

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SacPower RT9378A 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver General Description The RT9378A is a 4 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9378A 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. An internal 5-bit DAC is used for brightness control. Users can easily configure up to 16-step of LED current by enable pin. The RT9378A is available in a WQFN-12L 2x2 package. Small 0.22uF capacitors can be used for fly capacitors.
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