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RT9378A

Richtek
Part Number RT9378A
Manufacturer Richtek
Description 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver
Published Feb 27, 2015
Detailed Description SacPower RT9378A 4 Channels 100mA x1/x1.5/x2 Charge Pump White LED Driver General Description The RT9378A is a 4 chan...
Datasheet PDF File RT9378A PDF File

RT9378A
RT9378A

Overview
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.
It provides the best backlighting solution with high efficiency and smallest board space for portable application.
Ordering Information RT9378A Package Type QW : WQFN-12L 2x2 Operating Temperature Range G : Green (Halogen Free with Commer- cial Standard) Note : Richtek Green products are : ` RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Typical Application Circuit CFLY1 0.
22uF CFLY2 0.
22uF VIN 2.
8V to 4.
5V Pulse Dimming 3 C1P 5 VIN CIN 1uF 6 EN 2, Exposed pad (13) GND 1 4 12 C1N C2P C2N RT9378A LED1 7 LED2 8 LED3 9 LED4 10 VOUT 11 COUT 1uF 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 Transition In-rush Protection z 1MHz Switching Frequency z Typical 0.
4uA Low Shutdown Current z RoHS Co...


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