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LP3382 Datasheet(PDF) 1 Page - Lowpower Semiconductor inc

Part No. LP3382
Description  1.2MHzFixed-Frequency PWM Operation
Download  9 Pages
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Manufacturer  POWER [Lowpower Semiconductor inc]
Direct Link  http://www.lowpowersemi.com
Logo POWER - Lowpower Semiconductor inc

LP3382 Datasheet(HTML) 1 Page - Lowpower Semiconductor inc

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Preliminary Datasheet
LP3382
LP3382 – 01 Version 1.0 Datasheet
OCT.-2011
www.lowpowersemi.com
Page 1 of 9
High Performance, Constant Current Switching
Regulator For 8PCS White LED In Series
General Description
The LP3382 is a 1.2MHz PWM boost switching
regulator designed for constant- current white LED
driver applications. The LP3382 can drive a string of
up to 8 white LEDs in series, ensuring uniform
brightness and eliminating several ballast resistors.
The LP3382 implements a constant frequency
1.2MHz PWM control scheme. The high frequency
PWM operation also saves board space by reducing
external component sizes. To improve efficiency, the
feedback voltage is set to 250 mV, which reduces
the power dissipation in the current setting resistor.
Highly integration and internal compensation
network minimizes as 5 external component counts.
Optimized operation frequency can meet the
requirement of small LC filters value and low
operation current with high efficiency.
Ordering Information
LP3382
F: Pb-Free
Package:
B6: SOT23-6
Pin Configurations
(SOT23-6)
Features
High Efficiency: 92%  
1.2MHzFixed-Frequency PWM Operation
Maximum Output Voltage up to 29V
Operating Range : 2.7V to 5.5V
Shutdown Supply Current:<1uA  
Available in SOT23-6 Package  
Built-in 29V Over Voltage Protection  
Minimize the External Component
RoHS Compliant and 100% Lead (Pb)-Free
Applications
WLED Backlight driver
OLED Backlight driver
PDA
MID/PTV
Typical Application Circuit
Cout
1uF
Cin
10uF
10uH
R1
12
Vin
R2
100k
SS0520
PWM
EN
4
FB
3
Vin
6
OVP
5
LP3382
0-200KHz
Marking information
Part Number
Top Marking
Package
LP3382B6F
F5
SOT23-6
Other Information please view website:
www.lowpowersemi.com.


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