RT9302 Datasheet, PDF (1/9 Pages) Richtek Technology Corporation – 60mA 3-Channel Pulse Dimming Current Source LED Driver

RT9302
60mA 3-Channel Pulse Dimming Current Source LED Driver
General Description
The RT9302 is a high performance constant current driver
for white LED. It supports up to 3 white LEDs and regulates
a constant current for uniform intensity. Each channel
supports up to 20mA output current with 1% typical current
accuracy and 0.7% typical current matching. The RT9302
provides a 16-step brightness dimming control. The LED
current can be easily configured from 1.25mA to 20mA.
The dimming of white LEDs' current can be achieved by
applying a pulse signal to the EN pin. The LED current
can be turned off by EN pin with pull low for 20μs or longer.
The typical leakage current is 4μA while shutdown
condition.
RT9302 is available in a TSOT-23-8 package (1.0mm
maximum height).
Ordering Information
RT9302
Package Type
J8 : TSOT-23-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
RichTek Pb-free and Green 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.
`100% matte tin (Sn) plating.
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Features
z Support Up to 3 White LEDs
z Output Current up to 20mA Each Channel
z Support Pulse and PWM Dimming
z 40mV Typical Current Source Dropout
z 1% Typical LED Current Accuracy
z 0.7% Typical LED Current Matching
z 16-Step Brightness Control
z Low Noise and EMI
z Low Shutdown Current 4μA Typical
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Mobile Phone, DSC, MP3
z White LED Backlighting
z LCDDisplay Supply
Pin Configurations
(TOP VIEW)
8765
1 23 4
TSOT-23-8
Note : There is no pin1 indicator on top mark for TSOT-23-8
type, and pin 1 will be lower left pin when reading top mark
from left to right.
DS9302-02 March 2007
www.richtek.com
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