LP3164 Datasheet, PDF (1/5 Pages) Lowpower Semiconductor inc – 4-Channel Current Source White LED Driver

Preliminary Datasheet
LP3164
4-Channel Current Source White LED Driver
General Description
The LP3164 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 4 white LEDs with regulated constant current for
uniform intensity. The LP3164 maintains low dropout
current regulators. The LP3164 requires a 50mV 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 LP3164 is available in a QFN-16 package.
Features
— 2.7V to 6V Input Voltage
— 20mA maxim sink current
— PWM tuned LED brightness through PWM
pin(2KHz)
— Soft Start Function
— Built-in Thermal Protection
— IQ<1uA in Shutdown
— QFN-16 Package
— RoHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
Order Information
LP3164 - □ □ □
F: Pb-Free
Package Type
QV: QFN-16
PWM
8 _{EN LP3164 VIN} 7
1
2
3
NC
NC
4 ^NC
9
14
15
NC
NC
NC
16 ^NC
NC
13
LED1 ₁₂
LED2
LED3
LED4
11
10
6
PGND
GND
5
Marking Information
Please see website.
VBATT
1uF
Applications
— LCD Panel
— Cellular and Smart mobile phone
— PDA/DSC
— PMP
LP3164 – Ver. 1.0 Datasheet Feb.-2008
Page 1 of 5