Preliminary Datasheet
LP3361
6-Channel Constant Current White LED Driver
General Description
The LP3361 is a low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. It
supports 6 white LEDs with regulated constant current for
uniform intensity. The LP3361 maintains low dropout
current regulators. The LP3361 requires a 45mV dropout
at a 20mA load on each output to match the LED brightness.
The brightness of LEDs can be tuned through a pulse width
modulated signal at the PWM pin,the PWM frequency from
200Hz to 10KHz and the Duty from 0 to 100%.
The LP3361 is available in a TDFN-10 package.
Features
2.7V to 6V Input Voltage
20mA maxim sink current
Dual Panel Driver of WLED
PWM tuned LED brightness through EN pin
Soft Start Function
Built-in Thermal Protection
I
Q
<1uA in Shutdown
TDFN-10 Package
RoHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
LP3361
VBAT
3
8
ON/OFF
2
7
EN1
EN2
LED5
11
GND
LED6
VDD1
LED2
VDD2
LED3
LED4
LED1
1
4
5
6
9
10
Sub_Panel
2.2uF
Main_Panel
VBAT
Order Information
LP3361 -
□ □ □
F: Pb-Free
Package Type
QV:TDFN-10
Marking Information
Please see website.
Applications
LCD Panel
Cellular and Smart mobile phone
PDA/DSC
PMP
LP3361 – Ver. 1.0 Datasheet
Nov.-2008
Page 1 of 6
POWER [ LOWPOWER SEMICONDUCTOR INC ]
