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PDF EUP2983 Data sheet ( Hoja de datos )
| Número de pieza | EUP2983 | |
| Descripción | White LED Driver | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EUP2983 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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EUP2983
White LED Driver For
Buck-Boost Application
DESCRIPTION
The EUP2983 is a constant current boost converter
specially designed for driving white LEDs with wide
input range. The unique converter topology provide a
load voltage which can be greater or less than the input
voltage. With the tightly regulated load current, the
EUP2983 allows series connection with multiple
strings of the white LEDs.
The brightness of the LEDs can be adjusted through a
voltage level on the CTRL pin or by applying a PWM
signal to CTRL 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 EUP2983 is available in a space-saving, 8-pin
3mm x 3mm TDFN package.
FEATURES
z 6V to 25V Input Range
z 32V (typ.) Output with Overvoltage Protection
z Up to 90% Efficiency
z Flexible Analog or PWM Dimming Control
z Internal High Power MOSFET Switch
z 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 7~10 inch White LED Display Backlighting
z 12V Automotive Display System
z PDVD and Subnotebooks
z LED Lighting
Typical Application Circuit
DS2983 Ver1.2 Nov. 2008
Figure 1. High Brightness LEDs Application
1
1 page  
EUP2983Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Typical Operating Characteristics
VIN=8.4V Driving Multiple Strings LED
94
92
90
88
86
84
82
80
78
76 15LEDs
74 27LEDs
72 3LEDs
70
0 5 10 15 20
LED Current(mA)
95
93
91
89
87
85
83
81
79
77
75
0
Driving 9 Strings of 3 LEDs
VIN=6V
VIN=8.4V
VIN=15V
5 10 15
LED Current(mA)
20
LED Current vs. Direct-PWM Dimming
(FCTRL=1KHz)
22
20
18
16
14
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Duty Cycle(%)
Soft-Start and Shutdown
VIN=8.4V Driving 1 String of 3 LEDs
VIN=8.4V Driving 5 Strings of 3 LEDs
DS2983 Ver1.2 Nov. 2008
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet EUP2983.PDF ] | |
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