RT9052 Datasheet, PDF (1/9 Pages) Richtek Technology Corporation – Single Channel LED Current Source Controller

RT9052
Single Channel LED Current Source Controller
General Description
The RT9052 is a low cost, single channel LED current
source controller with a specific FAULT detector. The part
can drive an external NPN-BJT for various applications.
The RT9052 is operated with Vcc power ranging from 3.8V
to 13.5V. With such a topology, it's very flexible and cost
effective.
The RT9052 comes in a small SOT-23-6 package.
Ordering Information
RT9052
Package Type
E : SOT-23-6
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
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
EU= : Product Code
EU=DNN _{DNN : Date Code}
Features
z 3.8V to 13.5V Operation Voltage
z Voltage Reference 0.8V with ±2% High Accuracy
z FAULT Indicator with Delay
z Dimming Control by PWM
z Small Footprint Package SOT-23-6
z RoHS Compliant and Halogen Free
Applications
z LED Backlight applications
z Current Source
z Transistor Driver
Pin Configurations
(TOP VIEW)
VCC DRI FAULT
6
5
4
2
3
DIM GND ISET
SOT-23-6
Typical Application Circuit
V_LED
5V
12V
R1
100k
WLED
RT9052
6 _VCC
C_IN
1µF
DRI ⁵
ISET3 ^RB
4 _FAULT
GND ²
1 _DIM
R_ISET
DS9052-01 April 2011
www.richtek.com
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