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TD8201 Datasheet(PDF) 1 Page - TECHCODE SEMICONDUCTOR, INC.

Part # TD8201
Description  White LED Step-up Converter
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Manufacturer  TECHCODE [TECHCODE SEMICONDUCTOR, INC.]
Direct Link  http://www.techcodesemi.com/
Logo TECHCODE - TECHCODE SEMICONDUCTOR, INC.

TD8201 Datasheet(HTML) 1 Page - TECHCODE SEMICONDUCTOR, INC.

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December,  20,  2011                             Techcode  Semiconductor  Limited                           www.techcodesemi.com 
Techcode®
White LED Step-up Converter
TD8201
DATASHEET
General Description 
The TD8201 is a step‐up DC/DC converter designed for driving 
up to 5 white LEDs in series from a single cell Lithium  Ion 
battery  with  constant  current.  Because  it directly regulates 
output current, the TD8201 is ideal for driving   light  
emitting   diodes   (LEDs)   whose   light intensity is 
proportional to the current passing  through them,  not  the 
voltage  across  their  terminals.  A  single external  resistor  sets 
LED  current  between  2mA  and 20mA, which can then be 
easily adjusted using either a DC voltage or a pulse width 
modulated (PWM) signal up   to   100KHz.   Its   low  
104mV   feedback   voltage reduces  power  loss  and 
improves  efficiency.  The  OV pin   monitors   the   output 
voltage   and   turns   off   the converter if an 
over‐voltage condition is present due to an  open  circuit 
condition.  The  TD8201  is  available  in SOT23‐6 packages. 
Features  
Drives Up to 5 Series White LEDs from 3V 
Up to 87% Efficiency 
1.25MHz Fixed Switching Frequency 
Low 104mV Feedback Voltage 
Open Load Shutdown 
PWM Dimming 
SOT23‐6 Packages 
RoHS compliant   
Applications 
Cell Phones 
Handheld Computers and PDAs 
Digital Cameras 
Small LCD Displays 
 
 


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