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PDF EUP2586OIR1 Data sheet ( Hoja de datos )
| Número de pieza | EUP2586OIR1 | |
| Descripción | Asynchronies Boost | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUP2586
Small Package, High Performance,
Asynchronies Boost for WLED Driver
DESCRIPTION
The EUP2586 is a high frequency, asynchronous boost
converter designed for driving white LED arrays. With
integrated 0.19Ω power switch and 2A current limit,
the EUP2586 provides enough driving capability for
7”~10” LCD backlighting(13 strings of 3 or 4 LEDs
each). The device uses current mode, fixed frequency
architecture to regulate the LED current, which is
measured through an external current sense resistor. Its
low 200mV feedback voltage reduces power loss and
improves efficiency.
With the built-in over-voltage protection function
(OVP), the SW pin monitors the output voltage and
turn off the device if an over-voltage condition is
present due to an open circuit condition. Other features
include soft start, over-current limiting, thermal
protection and under-voltage lockout.
The EUP2586 is available in the tiny TSOT23-5
package to provide the best solution for PCB space
saving and total BOM cost.
FEATURES
2.6V to 5.5V Input Range
Internal 0.19Ω, 18V MOSFET Switch
High Efficiency Up to 93%
Lower Surface Temperature at ILED=180mA
1MHz Switching Frequency
2A Current Limit
Open LED Overvoltage Protection
Internal Soft-Start
PWM and DC Dimming Control
Available in TSOT23-5 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
7” to 10” LCD Panels
MID Backlighting
Netbook Backlighting
Portable Media Players
GPS Navigation Systems
Typical Application Circuit
Figure 1. EUP2586 PWM Dimming Application for White LED Driver
DS2586 Ver1.0 Feb. 2012
1
1 page  
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Typical Operating Characteristics
(VIN=3.6V, L=10µH, CIN=4.7µF, COUT=2.2µF, RFB=1.0Ω, ILED=195mA)
EUP2586
EN PWM Dimming Linearity
250
F=100Hz
F=200Hz
200
F=500Hz
F=1KHz
F=2KHz
F=5KHz
150 F=10KHz
F=20KHz
F=300Hz
EQ2
100
50
0
0 20 40 60 80 100
PW M DUTY(%)
1
0.95
0.9
0.85
0.8
0.75
0.7
2.6
VIN vs. Efficiency
ILED=6 0 m A
ILED=1 2 0 m A
ILED=1 8 0 m A
ILED=2 4 0 m A
ILED=3 0 0 m A
3.6 4.6
VIN(V)
5.6
200
150
100
50
0
0
DIM Voltage vs. ILED
1
DIM Voltage(V)
2
PART Surface Temp vs. VIN
70
65 ILED=200mA
ILED=3 0 0 m A
60
55
50
45
40
35
30
25
2.7 3.7 4.7
VIN(V)
VIN=3.6V Filtered PWM Dimming vs. ILED
200
150
100
F =100H z
F =200H z
F =500H z
F =1K H z
F =2K H z
F =5K H z
F =10K H z
F =20K H z
F =50K H z
50
0
0 20 40 60 80 100
PW M DUTY(%)
Soft Start
4ms/div
VEN=3.6V
5V/div
VOUT
10V/div
VFB
100mV/div
IIN
500mA/div
DS2586 Ver1.0 Feb. 2012
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet EUP2586OIR1.PDF ] | |
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