The RT9385BGQW is a 5 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9385BGQW can power up to 5 white LEDs with regulated constant current for uniform intensity. Each channel (LED1 to LED5) 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 32 steps of LED current by enable pin.The RT9385BGQW is available in a WQFN-16L 2x3 package. Small 1μF capacitors can be used for fly capacitors. It provides the best backlighting solution with high efficiency and smallest board space for portable application.
Feature
- 85% Average Efficiency Over Li-ion Battery Discharge
- Support Up to 5 White LEDs
- Support Up to 25mA/Per Channel
- Support Up to 125mA Output Current
- Flexible 32 Step Brightness Control
- 60mV Current Source Dropout
- 1% LED Current Accuracy
- 0.7% LED Current Matching
- Automatic x1/x1.5/x2 Charge Pump Mode Transition
- Low Input Noise and EMI Charge Pump
- 5V Over Voltage Protection
- Power On/Mode Transition Inrush Protection
- 1MHz Frequency Oscillator
- 0.4μA Low Shutdown Current
- RoHS Compliant and Halogen Free
Applications
- Camera Phone, Smart Phone
- White LED Backlighting
- Mobile Phone
- Tablet, Notebook, Pad
