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).
Features
Support Up to 3 White LEDs
Output Current up to 20mA Each Channel
Support Pulse and PWM Dimming
40mV Typical Current Source Dropout
1% Typical LED Current Accuracy
0.7% Typical LED Current Matching
16-Step Brightness Control
Low Noise and EMI
Low Shutdown Current 4μA Typical
μ
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
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)
Pin Configurations
(TOP VIEW)
LED2
LED1
NC
EN
8
1
LED3
7
2
NC
6
3
GND
5
4
VIN
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.
Note
: There is no pin1 indicator on top mark for TSOT-23-8
TSOT-23-8
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.
type, and pin 1 will be lower left pin when reading top mark
from left to right.
DS9302-02 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
