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Eutech Microelectronics

EUP2584A Datasheet Preview

EUP2584A Datasheet

White LED Step-Up Converter

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EUP2584A
White LED Step-Up Converter
In Tiny SOT-23 Package
DESCRIPTION
The EUP2584A 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 EUP2584A 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 0.3V feedback voltage minimizes power loss in the
current setting resistor for better efficiency. EUP2584A
is enhanced with Soft-Start function and that could
significantly reduce noise induced by capacitor.
The EUP2584A 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
DS2584A Ver1.0 Nov. 2007
Figure 1. White LED Application
1




Eutech Microelectronics

EUP2584A Datasheet Preview

EUP2584A Datasheet

White LED Step-Up Converter

No Preview Available !

Pin Configurations
Package Type
Tel: 0755-8398 3377 / 135 9011 2223
EUP2584A
Pin Configurations
SOT23-6
Pin Description
PIN
EN
OUT
IN
LX
GND
FB
SOT23-6
1
2
3
DESCRIPTION
Chip Enable Pin. Connect to 1.4V or higher to enable device, 0.3V or less to disable
device.
Overvoltage Sense. When VOUT is greater than 27V, the internal N-channel MOSFET
turns off until VOUT drops below 25V, then the IC reenters start. Connect a 1uF capacitor
from OUT to GND.
Input Supply Voltage
4 Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI.
5 Common Ground
6
Feedback Pin. Reference voltage is 0.3V. Connect cathode of lowest LED and resistor
here. Calculate resistor value according to the formula: RFB=0.3/ILED
DS2584A Ver1.0 Nov. 2007
2


Part Number EUP2584A
Description White LED Step-Up Converter
Maker Eutech Microelectronics
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EUP2584A Datasheet PDF






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