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PDF EUP2539OIR1 Data sheet ( Hoja de datos )
| Número de pieza | EUP2539OIR1 | |
| Descripción | 10 White LED Boost Converter | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUP2539
10 White LED Boost Converter
In Thin TSOT-23 Package
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 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
Typical Application Circuit
DS2539 Ver1.3 Dec. 2011
Figure 1. White LED Application
1
1 page  
EUP2539Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Typical Operating Characteristic
Quiescent Current vs. VIN
(Not Switching)
150
Quiescent Current vs. VIN
(Switching)
2
125 1.5
100 1
75 0.5
50
3
3.5 4 4.5 5
Input Voltage (V)
5.5
FB PIN Voltage vs. Temperature
306
304
302
300
298
296
-50
0 50 100
Temperature (℃)
150
Switching Frequency vs. Supply Voltage
1.1
1
0.9
0.8
3
3.5 4 4.5 5
Input Voltage (V)
DS2539 Ver1.3 Dec. 2011
5.5
5
0
3 3.5 4 4.5 5 5.5
Input Voltage (V)
FB PIN Voltage vs. Output Current
310
305
300
295
290
5
10 15 20 25
Output Current (mA)
30
LED Current vs. Input Voltage
40
35
30
25
20
15
10
5
0
3
RFB=10Ω
RFB=15Ω
RFB=20Ω
3.5 4 4.5 5
Input Voltage (V)
5.5
5 Page 
Packaging Information
EUP2539Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
TSOT23-5
SYMBOLS
A
A1
D
E1
E
L
b
e
MILLIMETERS
MIN.
MAX.
- 1.00
0.00 0.15
2.90
1.60
2.60 3.00
0.30 0.60
0.30 0.50
0.95
INCHES
MIN.
-
0.000
0.114
0.063
0.102
0.012
0.012
0.037
MAX.
0.039
0.006
0.118
0.024
0.020
DS2539 Ver1.3 Dec. 2011
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet EUP2539OIR1.PDF ] | |
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