LP3390 Datasheet, PDF (1/8 Pages) Lowpower Semiconductor inc – 1.2MHzFixed-Frequency PWM Operation

Preliminary Datasheet
LP3390
High Performance, Constant Current Switching for White LED
and Boost Convertor
General Description
The LP3390 is designed for constant- current white
LED driver applications. It can drive a string of up to
8 white LED from a 3.3V supply or 3S9P white LED
from a 5V supply in series. To improve efficiency, the
feedback voltage is set to 200mV, which reduces the
power dissipation in the current setting resistor.
LP3390 also has constant-voltage boost applications
and FB voltage is 1250mV. LP3390 implements a
constant frequency 1.2MHz PWM control scheme.
The high frequency PWM operation also saves board
space by reducing external component sizes.
Optimized operation frequency can meet the
requirement of small LC filters value and low
operation current with high efficiency.
Features
High Efficiency: 95%
1.2MHzFixed-Frequency PWM Operation
Maximum Output Voltage up to 30V
Operating Range : 2.7V to 6V
Shutdown Supply Current:<1uA
Available in SOT23-6 Package
Minimize the External Component.
RoHS Compliant and 100% Lead (Pb)-Free
Applications
 WLED Backlight driver
 Panel Bias Voltage supply
Typical Application Circuit
Order Information
LP3390 □ □ □
F: Pb-Free
Package Type
QV:SQVF
Pin Configurations
LP3390 Version 1.0 Datasheet
Marking Information
Device
Marking
LP3390QVF LPS
LP3390
xxxx
Package Shipping
QV:SQVF 3K/reel
NOV.-2013 www.lowpowersemi.com
Page 1 of 8