RT9368 Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – 4-Channel Charge Pump White LED Driver with Low Dropout Current Source

RT9368
4-Channel Charge Pump White LED Driver with Low
Dropout Current Source
General Description
Features
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 1.25mA
to 20mA 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.
z Very High Efficiency Over 80% of Battery Life
z Support up to 4 White LEDs
z Support up to 80mA Output Current
z 1% Typical LED Current Matching
z Soft Start Function
z Auto Charge Pump Mode Selection
z 250kHz Fixed Frequency Oscillator
z Output Over Voltage Protection
z PWM Dimming Control
z Low Input Noise and EMI
z RoHS Compliant 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 :
` 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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Applications
z Mobile Phone, DSC, MP3
z White LED Backlighting
z LCDDisplay Supply
Pin Configurations
(TOP VIEW)
LED4 1
NC 2
GND 3
C1P 4
16 15 14 13
12 EN
11 ISET
10 GND
17
9 C2P
5678
WQFN-16L 3x3
DS9368-07 April 2011
www.richtek.com
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