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Eutech Microelectronics

EUP2584 Datasheet Preview

EUP2584 Datasheet

White LED Step-Up Converter

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EUP2584
White LED Step-Up Converter
In Tiny SOT-23 Package
DESCRIPTION
The EUP2584 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 EUP2584 switches at 1.1MHz,
allowing the use of tiny external components. The
input and output capacitor can be as small as 1µF,
saving space and cost versus alternative solutions. A
low 0.25V feedback voltage minimizes power loss in
the current setting resistor for better efficiency.
EUP2584 is enhanced with Soft-Start function and that
could significantly reduce noise induced by capacitor.
The EUP2584 is available in low profile SOT23-6
package.
FEATURES
z 2.6V to 5.5V Input Range
z 27V Output with Over Voltage Protection
z High Efficiency :85 % Typical
z Internal Soft-Start
z PWM Dimming Control
z Internal High Power 30V MOSFET Switch
z Fast 1.1MHz Switching Frequency
z Small, Low-Profile Inductors and Capacitors
z SOT23-6 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Mobile Phone
z Digital Still Camera
z PDAs, Handheld Computers
z MP3 Players
z GPS Receivers
Typical Application Circuit
DS2584 Ver1.1 Mar. 2008
Figure 1. White LED Application
1




Eutech Microelectronics

EUP2584 Datasheet Preview

EUP2584 Datasheet

White LED Step-Up Converter

No Preview Available !

Pin Configurations
Package Type
EUP2584Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Pin Configurations
SOT23-6
Pin Description
PIN
LX
GND
FB
EN
IN
OUT
SOT23-6
DESCRIPTION
1 Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI.
2 Common Ground
3
Feedback Pin. Reference voltage is 0.25V. Connect cathode of lowest LED and resistor
here. Calculate resistor value according to the formula: RFB=0.25/ILED
4
Chip Enable Pin. Connect to 1.4V or higher to enable device, 0.3V or less to disable
device.
6 Input Supply Voltage
Overvoltage Sense. When VOUT is greater than 27V, the internal N-channel MOSFET turns
5 off until VOUT drops below 25V, then the IC reenters start. Connect a 1uF capacitor from
OUT to GND.
DS2584 Ver1.1 Mar. 2008
2


Part Number EUP2584
Description White LED Step-Up Converter
Maker Eutech Microelectronics
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EUP2584 Datasheet PDF






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