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LP3322 데이터시트(PDF) 1 Page - Lowpower Semiconductor inc

부품명 LP3322
상세설명  1.1MHzFixed-Frequency PWM Operation
PDF  8 Pages
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제조업체  POWER [Lowpower Semiconductor inc]
홈페이지  http://www.lowpowersemi.com
Logo POWER - Lowpower Semiconductor inc

LP3322 데이터시트(HTML) 1 Page - Lowpower Semiconductor inc

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Preliminary Datasheet
LP3322
LP3322 – 00 Vesion 1.0 Datasheet
Feb.-2013
www.lowpowersemi.com
Page 1 of 8
High Performance, Constant Current Switching
Regulator For 10PCS White LED In Series
General Description
The LP3322 is a 1.1MHz PWM boost switching
regulator designed for constant- current white LED
driver applications. The LP3322 can drive a string of
up to 10 white LEDs
in series or 3s9p LEDs from
3.6V, ensuring uniform brightness and eliminating
several ballast resistors. The LP3322 implements a
constant frequency 1.1MHz 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
200mV and 300mV, 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
LP3322
F: Pb-Free
Package:
B6: SOT23-6
FB Voltage
Default: VFB=200mV
A: VFB=300mV
Pin Configurations
(SOT23-6)
Features
High Efficiency: 88% 　
1.1MHzFixed-Frequency PWM Operation
Maximum Output Voltage up to 36V
Operating Range : 2.7V to 5.5V
Shutdown Supply Current:<1uA 　
Available in SOT23-6 Package 　
Built-in 39V 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
10uH
EN
4
FB
3
Vin
6
OUT
5
LP3322
Vin
VFB=200mV
Cin
10uF
R1
10
Cout
1uF
SD103
Marking information
Please view website.


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