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PDF AOZ1083 Data sheet ( Hoja de datos )
| Número de pieza | AOZ1083 | |
| Descripción | 1.2A Buck LED Driver | |
| Fabricantes | Alpha & Omega Semiconductors | |
| Logotipo |  |
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AOZ1083
1.2 A Buck LED Driver
General Description
The AOZ1083 is a high efficiency, simple to use,
1.2 A buck HB LED driver optimized for general lighting
applications. The AOZ1083 operates from a 3 V to 26 V
input voltage range and provides up to 1.2 A of
continuous LED current. The 280 mV LED current
feedback voltage minimizes the power dissipation of the
external sense resistor. The fixed switching frequency of
1.5 MHz PWM operation reduces inductor and capacitor
sizes.
The AOZ1083 is available in a tiny SOT23-6L package.
Features
z Up to 26 V operating input voltage range
z 240 mΩ internal NMOS
z Up to 95 % efficiency
z Internal compensation
z 1.2 A continuous output current
z Fixed 1.5 MHz PWM operation
z Internal soft start
z 280 mV LED current feedback voltage with ±5 %
accuracy
z Cycle-by-cycle current limit
z Short-circuit protection
z Thermal shutdown
z Small size SOT23-6L
Applications
z Point of load DC/DC conversion
z Set top boxes
z DVD drives and HDD
z LCD Monitors & TVs
z Cable modems
z Telecom/Networking/Datacom equipment
Typical Application
VIN
C1
4.7µF
C3
VIN BS
DIM LX
AOZ1083
GND
FB
L1
2.2µH
LED1
RS
VOUT
C2
10µF
Rev. 1.0 July 2011
Figure 1. 1.2 A Buck HB LED Driver
www.aosmd.com
Page 1 of 12
1 page  
AOZ1083
Typical Performance Characteristics
Circuit of Figure 1. VVIN = 12 V, Load = 1 W White LED unless otherwise specified.
Steady State Test
Dimming Startup Test
Vo ripple
50mV/div
VDIM
5V/div
500ns/div
Vlx
10V/div
Ilx
500mA/div
500μs/div
Vlx
10V/div
Iled
200mA/div
Dimming Shutdown Test
LED Short Test
5ms/div
VDIM
5V/div
Vlx
10V/div
Iled
200mA/div
5μs/div
Vlx
10V/div
Ilx
500mA/div
LED Short Protection
50μs/div
Vlx
10V/div
Vo
2V/div
Iled
200mA/div
LED Short Recovery
500μs/div
Vlx
10V/div
Vo
2V/div
Iled
1A/div
Rev. 1.0 July 2011
www.aosmd.com
Page 5 of 12
5 Page 
Tape and Reel Dimensions, SOT23-6
Tape
T D1
P1
P2
AOZ1083
E1
E2 E
Unit: mm
Package
SOT-23
B0
K0
A0 D0
P0
Feeding Direction
A0
3.15
±0.10
B0
3.27
±0.10
K0
1.34
±0.10
D0
1.10
±0.01
D1
1.50
±0.10
E
8.00
±0.20
E1
1.75
±0.10
E2
3.50
±0.05
P0
4.00
±0.10
P1
4.00
±0.10
P2
2.00
±0.10
T
0.25
±0.05
Reel
W1
G
MN
V
S
K
Unit: mm
Tape Size
8 mm
R
H
W
Reel Size
ø180
M
ø180.00
±0.50
N
ø60.50
Min.
W
9.00
±0.30
W1 H
K S G RV
11.40 ø13.00 10.60 2.00 ø9.00 5.00 18.00
±1.0 +0.50 / -0.20
±0.50
Leader/Trailer and Orientation
Trailer Tape
300mm min. or
75 Empty Pockets
Rev. 1.0 July 2011
Components Tape
Orientation in Pocket
www.aosmd.com
Leader Tape
500mm min. or
125 Empty Pockets
Page 11 of 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AOZ1083.PDF ] | |
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