RT9368
RT9368 is 4-Channel Charge Pump White LED Driver manufactured by Richtek.
4-Channel Charge Pump White LED Driver with Low Dropout Current Source
General Description
The RT9368 is a high efficiency and cost effective charge pump white LED driver. It supports up to 4 white LEDs with regulated constant current for uniform intensity. The RT9368 maintains the highest efficiency by utilizing a x1/ x1.5/x2 charge pump and low dropout current regulators. User can easily configure each LED current from 1.25m A to 20m A by a PWM dimming control. The dimming of white LEDs current can be achieved by applying a PWM signal to the EN pin. RT9368 is available in a WQFN 3x3-16L package.
Features z z z z z z z z z z z
Very High Efficiency Over 80% of Battery Life Support up to 4 White LEDs Support up to 80m A Output Current 1% Typical LED Current Matching Soft Start Function Auto Charge Pump Mode Selection 250k Hz Fixed Frequency Oscillator Output Over Voltage Protection PWM Dimming Control Low Input Noise and EMI Ro HS pliant and 100% Lead (Pb)-Free
Ordering Information
RT9368 Package Type QW : WQFN-16L 3x3 (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free)
Note : Richtek products are :
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Applications z z z
Mobile Phone, DSC, MP3 White LED Backlighting LCD Display Supply
Pin Configurations
(TOP VIEW)
LED3 LED2 LED1 VIN
12 EN 11 ISET 17 5 6 7 8 10 GND 9
Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in Sn Pb or Pb-free soldering processes.
LED4 NC GND
1 2 3 4
16 15 14 13
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Marking Information
For marking information, contact our sales representative directly or through a Richtek distributor located in your area.
C1P
C2P
WQFN-16L 3x3
DS9368-07 April 2011
VOUT
C2N
C1N
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