6 Channels 150mA x1/x1.5/x2 Charge Pump White LED Driver

RT9379

The RT9379 is a 6 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9379 can power up to 6 white LEDs with regulated constant current for uniform intensity. Each channel (LED1 to LED6) 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 RT9379 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.

Applications

Camera Phone, Smart Phone
White LED Backlighting

Key Spec.

	RT9379
Status	EOL
Vin (min) (V)	2.8
Vin (max) (V)	4.5
SW Freq (typ) (kHz)	1000
Number of LEDs (max) (pcs)	6
Iout (max)/channel (mA)	25
Iq (typ) (mA)	1
Dimming Control	PWM
Features	Enable Input;OVP
Package Type	WQFN2x3-16

Features

85% Average Efficiency Over Li-ion Battery Discharge
Support Up to 6 White LEDs
Support Up to 25mA/Per Channel
PWM 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
Over Voltage Protection
Power On/Mode Transition Inrush Protection
1MHz Switching Frequency
0.4μA Low Shutdown Current
RoHS Compliant and Halogen Free