RT9301_11 Datasheet, PDF (3/10 Pages) Richtek Technology Corporation – 3-Channel Low Dropout RGB LED Driver

Function Block Diagram
ISET1
ISET2
ISET3
+
-
V_REF
+
-
V_REF
+
-
V_REF
VIN
UVLO
Current Source
LED1
LED2
LED3
GND
RT9301
Functional Pin Description
Pin No.
Pin Name
RT9301□J8 RT9301GQW
Pin Function
RGB or White LED cathode connection pin. 2mA to 50mA C urrent
1
8
L ED3
flows into LED. Floating or connection to ground is used to disable
this pin.
7,
Ground Pin. The exposed pad must be soldered to a large PCB and
2
GND
Exposed Pad (9)
connected to GND for maximum pow er dissipation.
3
6
VIN
Power Input Pin.
4
5
ISET3
Current setting for LED3. Connect to GND if not use.
5
4
ISET2
Current setting for LED2. Connect to GND if not use.
6
3
ISET1
Current setting for LED1. Connect to GND if not use.
RGB or White LED cathode connection pin. 2mA to 50mA C urrent
7
2
L ED1
flows into LED. Floating or connection to ground is used to disable
this pin.
RGB or White LED cathode connection pin. 2mA to 50mA C urrent
8
1
L ED2
flows into LED. Floating or connection to ground is used to disable
this pin.
DS9301-05 April 2011
www.richtek.com
3