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发布者:来自网络 发布时间:2014/7/24 阅读:5116次    关键字: LED
EUP2539-10 White LED Boost Converter


EUP2539-10 White LED Boost Converter In Thin SOT-23 Package DataSheet 

DESCRIPTION

      The EUP2539 is a constant current step-up converter specifically designed to drive white LEDs. The Step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness. The EUP2539 switches at 1MHz, allowing the use of tiny external components. The output capacitor can be as small as 0.22μF, saving space and cost versus alternative solutions. A low 0.3V feedback voltage minimizes power loss in the current setting resistor for better efficiency. The EUP2539 high-voltage output stage is perfect for driving mid-size and large panel displays containing up to ten white LEDs in series. LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The enable input pin allows the device to be placed in shutdown mode with “zero” quiescent current.
      The EUP2539 is available in low profile TSOT23-5 package.

FEATURES

•  2.6V to 5.5V Input Range
•  38V Output with Over Voltage Protection
•  Internal Soft-Start
•  PWM Dimming Control
•  Internal High Power 40V MOSFET Switch
•  Fast 1MHz Switching Frequency
•  Small, Low-Profile Inductors and Capacitors
•  TSOT23-5 Package
•  RoHS Compliant and 100% Lead (Pb)-Free

APPLICATIONS

•  GPS Navigation Systems
•  Portable Media Players
•  Handheld Devices, Digital Camera
•  Portable Game Machines

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