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PDF AD5026 Data sheet ( Hoja de datos )
| Número de pieza | AD5026 | |
| Descripción | 16-BIT CONSTANT-CURRENT LED DRIVER | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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AiT Semiconductor Inc.
www.ait-ic.com
AD5026
LED DISPLAY DRIVER
16-BIT CONSTANT-CURRENT LED DRIVER
DESCRIPTION
AD5026 is a 16-channel, constant current sink
LED driver. It contains High-precision
current-drive circuit, 16-bit shift register, Latch
and temperature compensation circuit.
AD5026 provides users with great flexibility and
device performance in their system design for
LED display applications, e.g. LED panels.
AD5026 have the ability of the anti-static
technology and anti-jamming technology. It can
make chip data transmission more stable and
work more reliable. Chip antistatic ability up to
more than 4KV.
The AD5026 is available in SSOP24(0.635/1.0) &
QFN24 (4X4) Packages.
APPLICATION
Outdoor LED Video Display
Indoor LED Video Display
Message Signs
TYPICAL APPLICATION
FEATURES
Output constant current: 2~90mA
VDS ≧ 300mV (IOUT=20mA)
Red light min input voltage: 2.3~2.5V
Blue & Green light min input voltage: 3.6~3.8V
Constant Current Accuracy:
Channel-to-Channel<±2%
Device-to-Device<±3%
25MHz clock frequency
Operating voltage range: 3.3V~5V
Anti-static damage ability：＞4KV
Operating Temperature Range: -40℃～+85℃
Available in SSOP24 (0.635/1.0) & QFN24
(4X4) Packages.
ORDERING INFORMATION
Package Type
Part Number
SSOP24
MX24
AD5026MX24R-Z
AD5026MX24VR-Z
QFN24
Q24 AD5026Q24R
AD5026Q24VR
Note
V: Halogen free Package
R: Tape & Reel
Z: Dimension Selection
A type: 0.635
B type: 1.0
See package information
AiT provides all RoHS products
Suffix “ V” means Halogen free Package
REV1.3 -MAY 2010 RELEASED, AUG 2012 UPDATED –
-1-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
AD5026
LED DISPLAY DRIVER
16-BIT CONSTANT-CURRENT LED DRIVER
AC CHARACTERISTICS
VDD=5V, TA=25oC, unless otherwise specified.
Parameter
Symbol
Conditions
Supply Voltage
VDD
Output Voltage
VO
Output Current
Input Voltage (“H” Level)
Input Voltage (“L” Level)
LAT
Pulse Width
CLK
ENB
Setup Time for DATA
Hold Time for DATA
Setup Time for LAT
Hold Time for LAT
Clock Frequency
IO
IOH
IOL
VIH
VIL
tw(L)
tw(CLK)
tw(ENB)
tsu(D)
th(D)
tsu(L)
th(L)
FCLK
SOUT=VDD
SOUT=0
VDD=3.3 to 5V
Cascade Operation
Min Typ Max Unit
3.3 4.2 5.0 V
- - 10 V
2 - 90 mA
- - -1
mA
--1
0.7VDD - VDD+0.3 V
-0.3
-
0.3VDD
V
20 -
-
20 -
- ns
50 -
-
5-
- ns
10 -
- ns
5-
- ns
5-
- ns
- - 25 MHz
REV1.3 -MAY 2010 RELEASED, AUG 2012 UPDATED –
-5-
5 Page 
AiT Semiconductor Inc.
www.ait-ic.com
AD5026
LED DISPLAY DRIVER
16-BIT CONSTANT-CURRENT LED DRIVER
Constant Current
The AD5026 uses a high-precision constant current driver circuit and temperature compensation circuitry. To
ensure the chip at different temperature conditions, different working voltage and the use of harsh
environment, the bit output current IOUT constant good results.
VOUT vs. IOUT
Figure 1 Constant-current characteristic curves
From the figure we can see, when to meet the constant-current conditions, AD5026 constant-current driver
output stage voltage drop is very low. For example, when the output drive current IOUT = 10 mA, VOUT is about
30 mV. The unique ultra-low pressure drop characteristics, allowing AD5026 work below 3.3V
Adjusting Output Current
The output current of each channel (IOUT) is set by an external resistor, RSET. The relationship between IOUT
and RSET is shown in the following:
IOUT(mA)=18×1000/RSET
When the AD5026 for the LED Marquee, the bit output current IOUT is the LED operating current ILED Marquee
operating current ILED is the type of LED Marquee determined.
REV1.3 -MAY 2010 RELEASED, AUG 2012 UPDATED –
- 11 -
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AD5026.PDF ] | |
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