General Description

The HW9367 is an integrated solution for backlighting and phone camera input supply. The part contains a charge pump white LED driver and dual low dropout linear regulators.In the section of charge pump, The HW9367 can power up 4 white LEDs with regulated constant current for uniform intensity. Each channel (LED1-LED4) can support up to 30mA. The part maintains highest efficiency by utilizing a 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- step of LED current by I2C interface.In the section of linear regulator, The HW9367 comprises a dual channel, low noise, and low dropout regulator sourcing up to 300mA at each channel. The range of output voltage can be configured from 1.1V to 3.3V by I2C interface. The outputs of LDO offer 3% accuracy and low dropout voltage of 250mV @ 300mA. The LDO also provides current limiting and output short circuit thermal folded back protection.

Features 

􀁺 An Integrated Solution for Backlighting and Phone Camera Input Supply

*I2C Programmable, 32 Steps Dimming Control and Independent Channel On/Off Control

*Over Temperature Protection

*Power On Reset for Data Register

*Typical 1uA Low Shutdown Current with Interface Fully On

*Charge Pump White LED Driver

*Over 93% Peak Efficiency Over Li-ion Battery Discharge

*Typical 85% Average Efficiency Over Li-ion Battery Discharge

*Support Up to 4 White LEDs

*Output Current Up to 30mA/Channel 120mA Total

*60mV Typical Current Source Dropout

*1% Typical LED Current Accuracy

*0.7% Typical LED Current Matching

*Automatic x1/x1.5/x2 Charge Pump M