CYT 2506
White LED Step-Up Converter
General Description
The CYT2506 is a step-up DC/DC converter
specifically designed to drive white LEDs with a
constant current. The device can drive two,
three or four LEDs in series from a Li-Ion cell.
Series connection of the LEDs provides
identical LED current resulting in uniform
brightness and eliminating the need for ballast
resistors.
The CYT2506 switches at 1MHz, allowing
the use of any tiny external components. The
output capacitor can be as small as 1碌F,
saving space and cost versus alternative
solutions. A low 95mV feedback voltage
minimizes power loss in the current setting
resistor for better efficiency.
CYT2506 is available in low profile
SOT-23-5 packages.
Features
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Inherently Matched LED Current.
High Efficiency: 84% Typical.
Drives Up to Four LEDs from a 3.2V Supply.
Drives Up to Six LEDs from a 5V Supply.
Fast 1.2MHz Switching Frequency.
Uses Tiny 1mm Tall Inductors.
Requires Only 1碌F Output Capacitor.
Standard SOT-23-5 package.
Low Profile SOT Packaging.
Applications
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Cellular Phones
PDAs,
Handheld Computuers
Digital Camera
MP3 Players
GPS Receivers
SOT-23-5 Package
ShenZhen CYT IC Design CO ,Ltd
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