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PDF AOZ1084 Data sheet ( Hoja de datos )
| Número de pieza | AOZ1084 | |
| Descripción | 1.2A Buck LED Driver | |
| Fabricantes | Alpha & Omega Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AOZ1084 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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AOZ1084
1.2A Buck LED Driver
General Description
The AOZ1084 is a high efficiency, simple to use, 1.2A
buck HB LED driver optimized for general lighting
applications. The AOZ1084 works from a 4.5V to 36V
input voltage range, and provides up to 1.2A of
continuous LED current. The 160mV LED current
feedback voltage minimizes the power dissipation of the
external sense resistor. The fixed switching frequency of
450kHz PWM operation reduces inductor and capacitor
sizes.
The AOZ1084 is available in a tiny DFN2x2-8L package.
Features
Up to 36V operating input voltage range
420mΩ internal NMOS
Up to 95% efficiency
Internal compensation
1.2A continuous output current
Fixed 450kHz PWM operation
Internal soft start
160mV LED current feedback voltage with ±8%
accuracy
Cycle-by-cycle current limit
Short-circuit protection
Thermal shutdown
Small size DFN2x2-8L
Applications
General LED lighting
Architectural lighting
Signage lighting
Typical Application
VIN
C1
4.7µF
C3
VIN BS
DIM LX
AOZ1084
GND
FB
L1
2.2µH
LED1
RS
VOUT
C2
10µF
Figure 1. 1.2A Buck HB LED Driver
Rev. 0.3 April 2012
www.aosmd.com
Page 1 of 12
1 page  
Typical Performance Characteristics
VIN = 12 V, Load = 1 White LED unless otherwise specified.
200Hz Dimming Test (12V/3 LED)
DIM
5V/div
2ms/div
VO
10V/div
VLX
10V/div
ILX
500mA/div
AOZ1084
LED Short Test (36V/1 LED)
LED Short Recovery (36V/1 LED)
VO
5V/div
VLX
10V/div
ILX
500mA/div
50μs/div
Normal to LED Open (36V/3 LED)
DIM
5V/div
VO
5V/div
VLX
10V/div
500μs/div
ILX
500mA/div
VO
5V/div
VLX
10V/div
ILX
500mA/div
500μs/div
LED Open to Normal (36V/3 LED)
DIM
5V/div
VO
5V/div
VLX
10V/div
500μs/div
ILX
500mA/div
Rev. 0.3 April 2012
www.aosmd.com
Page 5 of 12
5 Page 
Tape and Reel Dimensions, DFN2x2
AOZ1084
Carrier Tape
K0
B0
P1
P2 D0
D1
E1
E2 E
T P0 A0
UNIT: mm
Feeding Direction
Package A0 B0 K0
D0
D1
E
E1 E2 P0 P1 P2
T
DFN 2x2 2.25 2.25 1.00 1.50
1.00
8.00 1.75 3.50 4.00 4.00 2.00 0.254
0.05 0.05 0.05 +0.10/-0 +0.25/-0 +0.30/-0.10 0.10 0.05 0.10 0.10 0.10 0.02
Reel
W1
S
R
MN
K
H
UNIT: mm
Tape Size Reel Size M
8mm
ø180 ø180.00
0.50
N
60.0
0.50
W1
8.4
+1.5/-0.0
H
13.0
0.20
SK
1.5 13.5
Min. Min.
R
3.0
0.50
Leader / Trailer
& Orientation
Rev. 0.3 April 2012
Trailer Tape
300mm Min.
Components Tape
Orientation in Pocket
www.aosmd.com
Leader Tape
500mm Min.
Page 11 of 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AOZ1084.PDF ] | |
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