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Eutech Microelectronics

EUP2595 Datasheet Preview

EUP2595 Datasheet

32V Step-Up Converters

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EUP2595
32V Step-Up Converters
for Two to Nine White LEDs
DESCRIPTION
The EUP2595 is a constant current step-up converter
specially designed for driving white LEDs. The step-up
converter topology allows series connection of the
white LEDs so the LED currents are identical for
uniform brightness. The EUP2595 can drive 9 LEDs in
series. The brightness of the LEDs can be adjusted
through a voltage level on the CTRL pin or by
applying a PWM signal to CRTL pin.
1MHz current-mode, pulse-width modulated (PWM)
operation allows for small input and output capacitors
and a small inductor while minimizing ripple on the
input supply/battery. Programmable soft-start
eliminates inrush current during startup.
The EUP2595 is available in a space-saving, 8-pin
3mm x 3mm TDFN package.
FEATURES
z 2.6V to 5.5V Input Range
z 32V (max) Output with Overvoltage Protection
z Up to 90% Efficiency
z Flexible Analog or PWM Dimming Control
z Internal High Power MOSFET Switch
z < 1µA shutdown Current
z Fast 1MHz PWM Operation
z Small, Low-Profile Inductors and Capacitors
z 3mm × 3mm TDFN-8 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Cell Phones and Smart Phones
z PDAs, Palmtops, and Wireless Handhelds
z e-Books and Subnotebooks
z White LED Display Backlighting
Typical Application Circuit
DS2595 Ver1.1 Aug. 2008
Figure 1. Typical Application Circuit
1




Eutech Microelectronics

EUP2595 Datasheet Preview

EUP2595 Datasheet

32V Step-Up Converters

No Preview Available !

Pin Configurations
Package Type
EUP2595Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Pin Configurations
TDFN-8
Pin Description
PIN
OUT
IN
Pin
1
2
CTRL
3
CS 4
COMP
GND
PGND
LX
5
6
7
8
DESCRIPTION
WLED output overvoltage sense pin. Add a 1kresistor to improve overvoltage sense
accuracy.
Input Supply Voltage.
Brightness Control Input. LED brightness is controlled by the voltage applied to
CTRL. Varying the voltage from 0.24V to 1.65V adjusts the brightness from dim to
bright, respectively. Any voltage above 1.65V does not increase brightness.
Current-Sense Feedback Input. Connect a resistor from CS to GND to set the LED bias
current. The voltage at CS regulates to VCTRL / 5 or 0.330V, whichever is lower.
Compensation Input. Connect a 0.1µF capacitor (CCOMP) from COMP to GND.
CCOMP stabilizes the converter and controls soft-start. CCOMP discharges to GND
when in shutdown.
Common Ground. Connect to PGND and the exposed pad directly under the IC.
Power Ground. Connect to GND and the exposed pad directly under the IC.
Inductor Connection. This pin is high impedance during shutdown.
DS2595 Ver1.1 Aug. 2008
2


Part Number EUP2595
Description 32V Step-Up Converters
Maker Eutech Microelectronics
PDF Download

EUP2595 Datasheet PDF






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