Datasheet

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Datasheet
AS3490
Highly Efficient 2-6 LEDs Backlight Driver with PWM Input
2 Key Features
MHz DCDC Boost converter
- Small 4.7µH external coil
- Very high system efficiency of 86% (DCDC and
current sources combined)
- Very low voltage changes on output to avoid
acoustic noise on output capacitor even with PWM
- Smooth startup even under low duty cycle PWM
conditions
Three Current sources up to 25mA
- Low voltage compliance (150mV)
- High side current source to simplify layout and
thermal management of the LEDs
- Automatically detect and disable failing or not used
LEDs to keep efficiency high
- Current matching <4%
- Current accuracy <7.5%
Excellent LED current output ripple <500µA
Support DLS (Dynamic Luminance Scaling or DBC)
Undervoltage lockout and overcurrent protection
Overtemperature protection
Available in a tiny WL-CSP package
- 3x4 balls, 0.4mm pitch, 1.7x1.4x0.5mm
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The output of the DCDC converter is used for five current sources connected to up to 6 LEDs. If a current
source is not required, it shall be connected to VOUT or
GND - the AS3490 detects this condition and disables
this current source automatically; this keeps the efficiency of the system constantly high.
2
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The AS3490 is an inductive highly efficient DCDC boost
converter. The DCDC converter operates at a fixed frequency of 2MHz and includes soft startup to allow easy
integration into noise sensitive RF systems. A predictable startup is guaranteed even with very low duty cycle
PWM input signals. The voltage on the output capacitor
is controlled to minimize ripple and to avoid any acoustic
effects for low frequency PWM input signals.
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1 General Description
The AS3490 is controlled by one enable input, ON. This
input can also be used to connect a PWM input (like
DLS or DBC).
The AS3490 includes several protection functions like
undervoltage lockout, overcurrent and overtemperature.
No microvias are required to assemble the AS3490.
The AS3490 is available in a space-saving WL-CSP
package measuring only 1.7x1.4x0.5mm and operates
over the -30ºC to +85ºC temperature range.
Figure 1. AS3490 Typical Operating Circuit
Display backlight driver for mobile phones, digital cameras, PND and PMPs.
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AS3490
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(ptr)
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3 Applications
1.2
1 - 18
AS3490
Datasheet - P i n o u t
4 Pinout
Pin Assignment
AS3490
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Pin Description
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Figure 2. Pin Assignments (Top View)
AS3490
Table 1. WL-CSP12 Pin Description
Pin Number
Pin Name
Description
A1
VIN
Positive supply voltage input - connect to supply and make a short connection
to input capacitor CVIN
ISET
External current set resistor, forced to 1.25V in operation - LED current
typically 400xISET current
LED1
Current source output 1 - controlled by ON
A2
A3
ON
B2
GND
Supply ground - connect to ground supply
LED2
Current source output 2 - controlled by ON
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B3
1
Digital input pin - enable input active high for current sources D1...D3
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B1
GND
Supply ground - connect to supply and make a short connection to input
capacitor CVIN and CVOUT
GND
Supply ground - connect to ground supply
C3
LED3
Current source output 3 - controlled by ON
D1
SW
D2
VOUT
DCDC converter output - make a short connection to capacitor COUT
D3
VOUT
Connect directly to Ball D2
C1
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C2
DCDC converter switching node
1. If ON is low low, the AS3490 enters shutdown.
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AS3490
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in Table 3, “Electrical
Characteristics,” on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
Table 2. Absolute Maximum Ratings
Min
Max
Units
VIN, ON and ISET to GND
-0.3
+7.0
V
+0.3
V
11
V
+0.3
V
internal protection diodes to VOUT
+100
+IIN
mA
Norm: EIA/JESD78
-0.3
SW, LED1...LED3 to VOUT
Input Pin Current without causing latchup
-100
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Continuous Power Dissipation (TA = +70ºC)
internal protection diodes to VIN
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ON and ISET to VIN
SW, VOUT, LED1...LED3 to GND
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Parameter
1
Continuous power dissipation
870
mW
PT at TAMB=70ºC
Continuous power dissipation derating factor
11.67
mW/ºC
PDERATE
ESD HBM
±2000
V
Norm: JEDEC JESD22-A114F
ESD CDM
±500
V
Norm: JEDEC JESD 22-C101E
ESD MM
±100
V
Norm: JEDEC JESD 22-A115-B
+125
ºC
+125
ºC
2
Electrostatic Discharge
Temperature Ranges and Storage Conditions
Junction Temperature
Storage Temperature Range
-55
Humidity
5
Body Temperature during Soldering
Moisture Sensitivity Level (MSL)
85
%
Non condensing
+260
ºC
according to IPC/JEDEC J-STD-020
Represents a max. floor life time of
unlimited
MSL 1
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1. Depending on actual PCB layout and PCB used
2. PDERATE derating factor changes the total continuous power dissipation (PT) if the ambient temperature is not
70ºC. Therefore for e.g. TAMB=85ºC calculate PT at 85ºC = PT - PDERATE * (85ºC - 70ºC)
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AS3490
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
VVIN = +2.5V to +5.5V, TAMB = -30ºC to +85ºC, unless otherwise specified. Typical values are at VVIN = +3.7V, TAMB =
+25ºC, unless otherwise specified.
Table 3. Electrical Characteristics
Symbol
Parameter
Condition
Min
Typ
2.5
3.7
Max
Unit
VVIN
Supply Voltage
VVIN_REDUC
ED
Supply Voltage
reduced performance
not all parameters within specification
ISHUTDOWN
Shutdown Current
ON=0V
0.5
IVIN
Operating Current
no load, PWM Normal mode
250
TAMB
Operating
Temperature
2.0
automatically regulated
VVOUT_RIPP Voltage VOUT due to
LE_PWM
PWM signal
25
VVIN+
0.3V
85
VVOUT
_MAX
VOUT<7.5V
VVIN=3.7V, TAMB = +25ºC,
LED mismatch <= 30mV,
VLED=3.0V
Overall Efficiency
ILOAD=50mA
V
100
mV
mA
86
85
ILOAD=100mA
All internal timings are derived from this
oscillator
Operating Frequency
70
0.0
ILOAD=75mA
ºC
140
DCDC not in pulseskip or current limit
Load current

µA
µA
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Output Voltage VOUT
ILOAD
V
V
all other conditions with ON13=ON45
fCLK
5.5
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-30
DCDC Converter parameters
VVOUT
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General Operating Conditions
86
%
86
-10%
2.0
+10%
MHz
Minimum on-time
60
ns
MDC
Maximum Duty Cycle
90
%
RSW_P
DCDC Switch
SW - VOUT
0.5

RSW_N
DCDC Switch
SW - GND
0.5

1.2
ms
7.0
V
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tMIN_ON
Output voltage soft start
tVOUT_START
START
tPWM_START
VOUT startup voltage
Startup with PWM
Maximum duration between PWM pulses
during startup; see Figure 17 on page 11
10
DCDC timeout time
if ON=0 for tTIMEOUT, the DCDC is stopped and
the AS3490 enters shutdown
29
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_MAX
tTIMEOUT
measured from first high signal on ON
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VVOUT_
softstart time
11
12
ms
48
ms
3.9
x2
V
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Current Sources
VLED1..3
LED1...LED3 output
voltage range
2.6
x2
ILED1..3
LED1...LED3 output
current range
0.0
25.0
mA
ILED1..3
LED1...LED3 current
1
source accuracy
-7.5
+7.5
%
www.austriamicrosystems.com/AS3490
ILED1..3 =20mA
1.2
3.3
x2
4 - 18
AS3490
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 3. Electrical Characteristics (Continued)
Parameter
Condition
Min
ILED1..3
LED1...LED3 current
source matching
ILED1..3 = 20mA
-4.0
ILED1..3
LED1...LED3 ripple
current
BW=10MHz
LED1...LED3
2
linearity
ILED=20mA,
PWM frequency 300Hz
MATCH
RIPPLE
ILED1..3
PWMLIN
Max
Unit
+4.0
%
ILED > 5mA
10
% of
ILED
ILED < 5mA
500
µA
PWM>=25/255
-2
25/255>
PWM>=1/255
-10
Typ
PWM input frequency
on pin ON
100
300
ILED1..3
LEAKAGE
LED1...LED3 leakage
current
current source off, TAMB < +50ºC
-0.5
0
VILED_COMP
LED1...LED3 current
source voltage
compliance
Minimum voltage between pin VOUT and
3
LED1...LED3, ILED<20mA
100
+2
%
+10
%
800
Hz
+0.5
µA
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fPWM
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Symbol
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mV
Current Reference (pin ISET)
VISET
ISET voltage
1.25
V
ILED2ISET
LED current to
ISETcurrent
400
A/A
Protection Functions (see page 12)
VVOUT_MAX
VOUT overvoltage
protection
VVOUT_OPE
VOUT open LED
detection threshold
Voltage level on VOUT where open LED
detection is performed
VLED_OPEN
VVLED1..3 open
detection
VLED_SHORT
V
8.5
8.8
V
an open LED is assumed if the voltage on the
current source is less than VLED_OPEN and
VOUT=VVOUT_OPENLED
92
125
mV
VLED1..3 short
detection
voltage on LED1..3 where a shorted LED is
assumed
0.95
tLED_ERROR
_DEB_OPEN
VLED1..3 open
debounce time
Open LED detection debounce time
4.8
µs
tLED_ERROR
_DEB_SHORT
VLED1..3 short
debounce time
Short LED detection debounce time
4
9.0
µs
ILIMIT
Current Limit for coil
LSW (Pin SW)
685
mA
TOVTEMP
Overtemperature
Protection
Overtemperature
Hysteresis
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TOVTEMPHY
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10.0
NLED
8.6
VUVLO
Undervoltage Lockout
8.0
510
600
V
144
ºC
5
ºC
Junction temperature
Falling VVIN
1.8
1.9
2.1
V
Rising VVIN
VUVLO
+0.05
2.2
2.3
V
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Digital Interface
VIH
High Level Input
Voltage
1.07
VVIN
V
VIL
Low Level Input
Voltage
0.0
0.68
V
RPULLDOWN
Pulldown resistor
1.8V on pad
90
250
k
1. Excluding variation of external resistor RISET; voltage difference between any set of drivers less than 200mV
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AS3490
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
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2. Note: It is not recommended to operate the current sources at minimum duty cycle with low LED currents.
3. The dcdc output voltage VOUT is regulated to 150mV above the maximum LED voltage (LED1...LED3) to guarantee proper operation of the current with output voltage ripple and undershoots (e.g. due to PWM or supply
voltage changes)
4. The short LED detection debounce time is longer than the open LED detection debounce time to allow the parasitic capacitance of the LED to charge above VLED_SHORT within this time and avoid wrong triggering of short
LED detection.
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1.2
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AS3490
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
VBAT = 3.7V, TA = +25ºC (unless otherwise specified).
95
95
90
90
85
85
80
80
75
%
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%
Figure 4. LED Efficiency vs. VBAT
75
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Figure 3. DCDC Efficiency vs. VBAT
70
70
65
65
VLED=7.5V, ILEDs=73.5mA
VLED=7.5V, ILEDs=73.5mA
60
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60
VLED=7.5V, ILEDs=49mA
VLED=7.5V, ILEDs=49mA
55
55
2,5
2,9
3,3
3,7
4,1
4,5
4,9
2,5
5,3
Figure 5. Efficiency vs. Load Current
95
90
85
)
%
( 80
y
c
n75
ie
c
fif 70
E
65
2,9
3,3
3,7
4,1
4,5
4,9
5,3
Input Voltage (V)
Input Voltage (V)
Figure 6. Startup with PWM, 20% duty cycle
LED Efficiency (PLED/PVIN)
60
DCDC Efficiency (PDCDC/PVIN)
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55
0
25
50
75
ILED(s) (mA) - combined
Figure 8. DCDC Switching Waveforms
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Figure 7. Startup with PWM, 70% duty cycle
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AS3490
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 10. VIN line transient 10µs (ILOAD=100mA)
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Figure 9. Open LED Detection Waveform
Figure 12. ILED ripple (ILOAD=100mA)
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Figure 11. VOUT ripple with PWM
Figure 13. ILED vs. RISET
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25
2,050
ILED [mA]
2,025
ch
20
Figure 14. fosc vs.VIN
15
ILED
mA
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2,000
fosc
[MHz]
10
1,975
5
-30deg
85deg
ILED=VISET/RISET*ILED2ISET
0
0
25
50
75
100
125
25deg
150
175
200
1,950
2,3
RISET [kOhm]
www.austriamicrosystems.com/AS3490
2,7
3,1
3,5
3,9
4,3
4,7
5,1
5,5
Input Voltage (V)
1.2
8 - 18
AS3490
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 15. Current Error vs. duty cycle (ILED=25mA)
4
3
2
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error
[%]
1
lv
0
-1
0
10
20
30
40
50
60
70
80
90 100
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PWM duty cycle [%]
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1.2
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AS3490
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS3490 is a high performance DCDC step up converter and three current sources in a small WL-CSP12 package.
1
2
The LED configuration is done in up to three strings , each strings using two LEDs in series . This configuration results
in excellent application efficiency even using very small external components (capacitors and coil). The device is controlled by ON. A high levels on this input enables the DCDC and the current sources. ON can be used as PWM input
to accurately control the LED brightness.
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The target application is to use the AS3490 for highly efficient backlight driver (display and/or keypad backlight).
Internal Circuit
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Figure 16. AS3490 internal circuit
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AS3490
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The AS3490 includes a fixed frequency DCDC step-up with accurate startup control. It is enabled by the input pin ON
and controls the LED current with five current sources. These input can be used as PWM inputs to control the brightness:
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- a high level on ON enables LED1, LED2 and LED3
The current is adjustable by an external resistor RISET.
1. Unused strings shall be connected to VOUT or GND.
2. Single LED strings can be mixed with dual LED strings as long as one string has two LEDs in series - it will
reduce application efficiency.
3. Using the PWM inputs, the AS3490 supports DLS, dynamic luminance scaling, also called CABC, content
adaptive backlight control or DBC, dynamic backlight control.
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1.2
10 - 18
AS3490
Datasheet - D e t a i l e d D e s c r i p t i o n
Startup
In order to avoid inrush-current during startup the supplies are smoothly ramped up according to Figure 17 even under
low PWM duty cycle conditions. This allows the easy integration into mobile battery powered systems:
Figure 17. Startup Procedure
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1
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Open and short LED detection
After the startup is finished, the AS3490 continuously monitors open and shorted LEDs. If an open or shorted LED
string is detected, this LED string is disabled and the driver continuous its normal operation. The driver is disabled to
keep the efficiency of AS3490 for different LED configurations high. The error is cleared once the AS3490 enters shut4
down .
Shorted LED
After startup is finished, for any LED, enabled by the inputs ON, is below VLED_SHORT, for at least
tLED_ERROR_DEB_SHORT, a shorted LED is assumed.
Open LED
LED outputs (LED1...LED5) which are not used by the application shall be connected permanently to VOUT or GND.
The AS3490 detect this condition upon startup and automatically disables the current sources for these LEDs - see
Figure 18 and Figure 19, immediately after the rising edged of ON.
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For LEDs, which are open during operation of the device, following procedure of the AS3490 is used for detection:
5
After startup is finished, if the voltage on VOUT=VVOUT_OPENLED and the voltage across any current source, enabled
by the inputs ON, is below VLED_OPEN (VOUT-LED1...3), for at least tLED_ERROR_DEB_OPEN, an open LED is assumed.
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Figure 18 shows the waveform for the detection of a single open LED, Figure 19 for all LEDs open.
4. The error is automatically cleared as the open/short LED error might be temporarily (e.g. bouncing of the
connections to the LED)
5. If the current limit of the coil (ILIMIT) is reached before VOUT=VVOUT_OPENLED, an open LED is not
detected.
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AS3490
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 18. Single Open LED detection
!
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"#/
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3
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Figure 19. All LEDs open
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Protection and Fault Detection Functions
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The protection functions protect the AS3490, its external components and connected LEDs against physical damage.
Overvoltage Protection
6
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The voltage on VOUT is kept below or at VVOUT_MAX under every operating condition . If the voltage on VOUT is at
7
VVOUT_MAX for more than 70ms , the DCDC will shutdown. It can be re-enabled by setting ON to low for more than
tTIMEOUT.
6. When reaching VOUT=VVOUT_OPENLED, the open LED detection is performed.
7. The duration can vary from 55ms to 85ms within a single AS3490.
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1.2
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AS3490
Datasheet - D e t a i l e d D e s c r i p t i o n
DCDC Inductor Peak Current Limitation
To limit the maximum current from the battery, the DCDC converter limits its current through the coil to ILIMIT on a cycle
by cycle basis.
Overtemperature Protection
Supply undervoltage Protection
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If the voltage on the pin VIN is or falls below VUVLO, the AS3490 is kept in shutdown.
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The junction temperature of the AS3490 is continuously monitored. If the temperature exceeds TOVTEMP, the DCDC is
stopped. The driver is automatically re-enabled once the junction temperature drops below TOVTEMP-TOVTEMPHYST.
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13 - 18
AS3490
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
External Components
Input Capacitor CVIN
Table 4. Recommended Input Capacitor
Size
Manufacturer
X5R
6V3
X5R
6V3
0402
(1.0x0.5x
0.5mm)
Murata
www.murata.com
C
TC Code
GRM155R60J225ME15
2.2µF +/-20%
GRM155R60J155M---D
1.5µF
ESR
0402
(1.0x0.5x
0.5mm)
JDK105BJ155MVNF
Panasonic Matsushita
www.panasonic.com
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X5R
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Rated
Voltage
Part Number
ECJ0MBFJ185V
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Low ESR input capacitors reduce input switching noise and reduce the peak current drawn from the battery. Ceramic
capacitors are required for input decoupling and should be located as close to the device as is practical.
0402
(1.0x0.5x
0.5mm)
X5R
Taiyo Yuden
www.taiyo-yuden.com
If a different input capacitor is chosen, ensure similar ESR value and at least 0.6µF capacitance at the maximum input
supply voltage. Larger capacitor values (C) may be used without limitations.
Output Capacitors COUT
Low ESR capacitors should be used to minimize VOUT ripple. Multi-layer ceramic capacitors are recommended since
they have low ESR and are available in small footprints. The capacitor should be located as close to the device as is
practical.
X5R dielectric material is recommended due to their ability to maintain capacitance over wide voltage and temperature
range.
Table 5. Recommended Output Capacitor COUT
Part Number
TC Code
ESR
Rated
Voltage
Size
Manufacturer
10µF
X5R
120m
10V
0805
(2x1.25x
0.85mm)
Murata
www.murata.com
10V
0805
(2x1.25x
0.85mm)
Taiyo Yuden
www.taiyo-yuden.com
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GRM219R61A116UE82L
C
10µF
X5R
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LDK212BJ106MDNT
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If a different output capacitor is chosen, ensure similar ESR values and at least 4.2µF @ 5.6V and maximum 20µF
capacitance.
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1.2
14 - 18
AS3490
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Inductor LSW
The fast switching frequency (2MHz) of the AS3490 allows for the use of small SMDs for the external inductor. The
2
inductor should have low DC resistance (DCR) to reduce the I R power losses - high DCR values will reduce efficiency.
Table 6. Recommended Inductor
L
DCR
Size
Manufacturer
LQM2HPN4R7MGC
4.7µH;
>2.45µH @ 0.5A
160m
2.5x2.0x0.9mm
max height 1.0mm
Murata
www.murata.com
CIG32K1R0SAF
4.57µH;
>2.45µH @ 0.5A
<300m
2.0x1.25x0.9mm
max height 1.0mm
Samsung ElectroMechancs
www.sem.samsung.co.kr
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If a different inductor is chosen, ensure similar DCR values and at least 2.45µH inductance at maximum peak input
current.
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PCB Layout Guideline
The high speed operation requires proper layout for optimum performance. Route the power traces first and try to minimize the area and wire length of the three high frequency/high current loops:
Loop1: pin GND - CVIN - LSW - pin SW - pin GND
Loop2: pin GND - CVIN - LSW - pin SW - pin VOUT - CVOUT - pin GND
At the pin GND a single via (or more vias, which are closely combined) connects to the common ground plane. This
via(s) will isolate the DCDC high frequency currents from the common ground (as most high frequency current will flow
between Loop1 and Loop2 and will not pass the ground plane) - see the ‘island’ at the two through ground vias in
Figure 20:
Figure 20. Layout recommendation
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Note: If component placement rules allow, move all components close to the AS3490 to reduce the area and length
of Loop1 and Loop2
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AS3490
Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
10 Package Drawings and Markings
Figure 21. 12pin WL-CSP12 1.7x1.4x0.5mm Marking
AS3490
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Note:
austriamicrosystems logo
AS3490
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Encoded Datecode (4 characters)
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Line 1:
Line 2:
Line 3:
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Figure 22. 12pin WL-CSP12 1.7x1.4x0.5mm Package Dimensions
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The coplanarity of the balls is 40µm.
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AS3490
Datasheet - O r d e r i n g I n f o r m a t i o n
11 Ordering Information
The devices are available as the standard products shown in Table 7.
Table 7. Ordering Information
Description
Delivery Form
Package
AS3490-ZWLT
Highly Efficient 2-6 LEDs Backlight Driver with
PWM Input
Tape & Reel
12-pin WL-CSP
(1.7x1.4x0.5mm)
RoHS compliant / Pb-Free /
Green
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Note: All products are RoHS compliant and austriamicrosystems green.
Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect
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Technical support is found at http://www.austriamicrosystems.com/Technical-Support
Note: AS3490-ZWLT
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For further information and requests, please contact us mailto:[email protected]
or find your local distributor at http://www.austriamicrosystems.com/distributor
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AS3490Z
Temperature Range: -30ºC - 85ºC
WL Wafer Level Chip Scale Package (WL-CSP) 1.7x1.4x0.5mm
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Delivery Form: Tape & Reel
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AS3490
Datasheet - O r d e r i n g I n f o r m a t i o n
Copyrights
Copyright © 1997-2012, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe.
Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
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All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
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Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing
in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding
the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information.
This product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for
each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard
production flow, such as test flow or test location.
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The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,
austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to
personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of
austriamicrosystems AG rendering of technical or other services.
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Contact Information
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Headquarters
austriamicrosystems AG
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Tobelbaderstrasse 30
Schloss Premstaetten
A-8141 Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact
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