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PDF LP3321 Data sheet ( Hoja de datos )
| Número de pieza | LP3321 | |
| Descripción | Constant Current Switching Regulator | |
| Fabricantes | Lowpowersemi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LP3321 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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Preliminary Datasheet
LP3321
High Performance, Constant Current Switching
Regulator For 10PCS White LED In Series
General Description
The LP3321 is a 1.3MHz PWM boost switching
regulator designed for constant- current white LED
driver applications. The LP3321 can drive a string of
up to 10 white LEDs in series, ensuring uniform
brightness and eliminating several ballast resistors.
The LP3321 implements a constant frequency
1.3MHz 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 195 mV 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
LP3321
F: Pb-Free
Package:
J6: TSOT23-6
J5: TSOT23-5
FB Voltage
Default: VFB=195mV
A: VFB=300mV
Pin Configurations
Features
High Efficiency: 90%
1.3MHzFixed-Frequency PWM Operation
Maximum Output Voltage up to 40V
Operating Range : 2.7V to 5.5V
Shutdown Supply Current:<1uA
Available in TSOT23-5/TSOT23-6 Package
Built-in 40V 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
Vin
Cin
10uF
10uH
D1
SS14
Cout
1uF
5
Vin
LP3321
4 EN
FB 3
VFB=195mV
R1
10
Marking information
Please view website.
(TSOT23-5)
LP3321 – 01 Vesion 1.1 Datasheet
(TSOT23-6)
Feb.-2011
www.lowpowersemi.com
Page 1 of 9
1 page  
Preliminary Datasheet
LP3321
LP3321 – 01 Vesion 1.1 Datasheet Feb.-2011
www.lowpowersemi.com
Page 5 of 9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LP3321.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LP3321 | Constant Current Switching Regulator | Lowpowersemi |
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