uP7536BRA8 [UPI]
Power Multiplexer;
| 型号： | uP7536BRA8 |
| 厂家： | 
uPI Semiconductor Corp. |
| 描述： | Power Multiplexer |
| 文件： | 总17页 (文件大小：741K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
uP7536
Power Multiplexer
for USB High Side Switch
Features
General Description
The uP7536 is a current limited power multiplexer acting Compliant to USB Specifications
as a high side switch for USB applications where heavy
capacitive loads and short-circuits are likely to be
encountered. It switches output voltage to 5VSB at S3/
S4/S5 states with 400mΩ switch and 200mA capacity; to
5VCC at S0/S1/S2 states with 80mΩ switch and 1.5A
capacity.
Operating Range: 4.5 V to 5.5 V
Output Voltage Switch to 5VSB at S3/S4/S5
200mA Continuous Load Current
400mΩ High Side Switch
Output Voltage Switch to 5VCC at S0/S1/S2
1.5A Continuous Load Current
80mΩ High Side Switch
Low Quiescent Current: 50uA Typical
Low Standby Current: Less Than 1uA
Slow Turn On and Fast Turn Off
Enable Active-High
This device features an active-high enable control input.
Soft start function limits the inrush current from supply
input when enabled. Disabling the device reduces its
standby current down to less than 1uA.
Optimal switch logic according to S3# and 5VCC status
ensures seamless output voltage transition.
When the output load exceeds the current-limit threshold
or a short is present, the uP7536 asserts over current
protection and limits the output current to a safe level by
driving the power switches into saturation mode.
UL Approved : E316940
TuV EN60950-1 Certification
CB IEC60950-1 Certificatioon
RoHS Compliant and Halogen Free
Other features include soft-start to limit inrush current
during plug-in, thermal shutdown to prevent catastrophic
switch failure from high-current loads, under-voltage lockout
(UVLO) to ensure that the device remains off unless there
is a valid input voltage present. The uP7536 is available in
SOT23-8L, (P)SOP-8L, MSOP-8L packages.
Ordering Information
Order Number
uP7536AMA8
uP7536ASW8
uP7536ARA8
uP7536BMA8
uP7536BSW8
uP7536BRA8
Package
SOT23-8L
PSOP-8L
MSOP-8L
SOT23-8L
PSOP-8L
MSOP-8L
Top Marking
S32
uP7536A
uP7536A
S58
Applications
Notebook and Desktop PCs
USB Power Management
ACPI Power Distribution
Hot-Plug Power Supplies
uP7536B
uP7536B
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 requirement. They are halogen-free,
RoHS compliant and 100% matte tin (Sn) plating that are
suitable for use in SnPb or Pb-free soldering processes.
uP7536-DS-F0101, Jul. 2012
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1
uP7536
Pin Configuration & Typical Application Circuit
VOUT
VOUT
OC#
1
2
3
4
8
7
6
5
5VCC
5VSB
GND
EN
5VCC
5VSB
GND
EN
1
2
3
4
8
7
6
5
VOUT
VOUT
OC#
VOUT
VOUT
OC#
5VCC
5VSB
5VCC
5VSB
GND
EN#
VOUT
S3#
S3#
SOT23-8L
SOP-8L
1
2
VOUT
VOUT
OC#
1
8
5VCC
5VSB
GND
EN
5VCC
5VSB
1
VOUT
S3#
2
3
4
7
6
5
2
3
4
VOUT
OC#
S3#
9
GND
3
4
GND
EN
S3#
PSOP-8L
MSOP-8L
Functional Pin Description
Pin Name Pin Function
Supply Input from 5VCC. This pin is the N-Channel MOSFET Drain that supplies output current at
S0/S1/S2 states and should be connected to 5VCC. Bypss this pin with a minimum 1uF capacitor to
ground.
5VCC
5VSB
Supply Input. This pin is the N-Channel MOSFET Drain that supplies output current at S3/S4/S5
states and should be connected to 5VSB. This pin also supplies operating current for the device.
Bypass this pin with a minimum 1uF capacitor to ground.
Ground.
GND
EN
Enable Input. This is the enable input to turn on/off the power switch. Pulling low this pin shuts down
the device.
Sleep State Control Pin. This pin along with the 5VCC status controls the switching configuration.
S3#
OC#
Fault Flag. This is an active-low, open-drain fault flag output for the power switch. The uP7536 asserts
this pin low when fault occurs with typical 8ms deglitch delay.
Output Voltage. These pins are output from N-Channel MOSFET Sources. Bypass these pins with a
minimum 10uF capacitor to ground.
VOUT
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uP7536
Functional Block Diagram
5VSB
5VCC
Q1
Q2
5VCC
UVLO
5VSB
UVLO
VOUT
VOUT
S3#
Thermal
Shutdown
Switch
Logic
Charge
Pump
Charge
Pump
Current
Limit
OC#
Soft
Start
Deglitch
EN#
GND
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uP7536
Functional Description
Power Switches
reduces the supply current down to less than 1uA. Logic
high restores bias to the drive and control circuits and turns
the switch on.
The uP7536 is a current limited power multiplexer acting
as a high side switch for USB applications where heavy
capacitive loads and short-circuits are likely to be Soft Start
encountered. It contains twoN-Channel MOSFETs Q1 and
The uP7536 features soft start function to eliminate the
Q2 as power switches that supply output current to VOUT
pins. The sources of Q1 and Q2 are connected together to
the VOUT pins, the drain of Q1 is connected to 5VCC pin
and the drain of Q2 is connected to 5VSB pin. The
MOSFETs are without body diode and prevent current flows
when turned off.
inrush current into downstream and voltage droop of
upstream when hot-plug-in with capacitive loads. The soft
start interval is 1.3ms typically. The input current to charge
up the load capacitor is proportional to its capacitance.
The uP7536 current limit function may be active during the
plug-in of extreme large capacitive load.
Q2 is a 400mΩ MOSFET with 200mAcapacity and Q1 is a
80mΩ MOSFET with 1.5A capacity. The power switches
are driven by internal charge pumps and controlled by S3#
and enable status. The uP7536 switches the output voltage
to 5VSB through Q2 at S3/S4/S5 states, to 5VCC through
Q1 at S0/S1/S2 states.
Over Current Limit
The uP7536 continuous monitors the output current for over
current protection to protect the system power, the power
switch, and the load from damage during output short circuit
or soft start interval. When an overload or short circuit is
encountered, the current-sense circuitry sends a control
signal to the driver. The driver in turn reduces the gate
Charge Pumps and Drivers
An internal charge pump supplies power to the driver circuit voltage and drives the power FET into its saturation region,
and provides the necessary voltage to pull the gate of the which switches the output into a constant-current mode
MOSFET above the source. The driver controls the gate and holds the current constant while varying the voltage on
voltage of the power switch. To limit large current surges the load. The current limit level is typical 2.3A when the
and reduce the associated electromagnetic interference power switch operates in linear region and is typical 1.5A
(EMI) produced, the driver incorporates circuitry that in saturation region.
controls the rise times and fall times of the output voltage.
The uP7536 asserts fault condition and pulls low OC# when
Chip Enable
over current, over temperature, input under voltage lockout
condition is encountered. The output remains asserted until
the overcurrent or overtemperature condition is removed.A
8ms deglitch circuit prevents the OC# signal from oscillation
The EN pin receives a TTL or CMOS compatible input to
enable/disable the uP7536. Logic low disables the power
switch, charge pump, gate driver and other circuitry and
5VSB
EN
5VSB
_DRV
VOUT
S3#
5VCC
5VCC
_DRV
T1
T2 T3
T4
T5
T6
T7
T8
T9
T10
Figure 1. Typical TimingDiagram
4
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uP7536
Functional Description
or false triggering. If an over temperature shutdown occurs,
the OC# is asserted instantaneously.
Under Voltage Lockout
A voltage sense circuit monitors the input voltage. When
the input voltage is below approximately 4.2V, a control
signal turns off the power switch.
Over Temperature Protection
The uP7536 continuously monitors the operating
temperature of the power switch for over temperature
protection. The uP7536 asserts over temperature and turns
off the power switch to prevent the device from damage if
the junction temperature rises to approximately 135OC due
over current or short-circuit conditions. Hysteresis is built
into the thermal sense, the switch will not turn back on
until the device has cooled approximately 20 degrees. The
open-drain false reporting output (OC#) is asserted (active
low) when an overtemperature shutdown or over current
occurs. If the fault condition is not removed, the switch will
pulse on and off as the temperature cycles between these
limits.
uP7536-DS-F0101, Jul. 2012
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5
uP7536
Absolute Maximum Rating
(Note 1)
Supply Input Voltage, 5VSB ----------------------------------------------------------------------------------------------- -0.3V to +5.7V
Other Pins ------------------------------------------------------------------------------------------------------------------------------------- -0.3V to +5.7V
StorageTemperature Range ----------------------------------------------------------------------------------------------------------- -65OC to +150OC
JunctionTemperature ------------------------------------------------------------------------------------------------------------------------------------ 150OC
LeadTemperature (Soldering, 10 sec) ------------------------------------------------------------------------------------------------------------ 260OC
ESD Rating (Note 2)
HBM (Human Body Mode) --------------------------------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ----------------------------------------------------------------------------------------------------------------------------- 200V
Thermal Information
Package Thermal Resistance (Note 3)
SOT23-8L θJA ----------------------------------------------------------------------------------------------------------------------------- 250°C/W
SOT23-8LθJC ---------------------------------------------------------------------------------------------------------------------------- 140°C/W
SOP-8LθJA ------------------------------------------------------------------------------------------------------------------------------- 160°C/W
SOP-8L θJC ------------------------------------------------------------------------------------------------------------------------------- 40°C/W
PSOP-8L θJA ------------------------------------------------------------------------------------------------------------------------------- 50°C/W
PSOP-8L θJC ------------------------------------------------------------------------------------------------------------------------------- 5°C/W
MSOP-8L θJA ----------------------------------------------------------------------------------------------------------------------------- 160°C/W
MSOP-8LθJC ------------------------------------------------------------------------------------------------------------------------------ 40°C/W
PowerDissipation, PD @ TA = 25°C
SOT23-8L ------------------------------------------------------------------------------------------------------------------------------------------ 0.4W
SOP-8L ------------------------------------------------------------------------------------------------------------------------------------------ 0.625W
PSOP-8L ------------------------------------------------------------------------------------------------------------------------------------------ 2.0W
MSOP-8L ------------------------------------------------------------------------------------------------------------------------------------------ 0.625W
Recommended Operation Conditions
(Note 4)
Operating Junction Temperature Range ---------------------------------------------------------------------------------- -40°C to +125°C
OperatingAmbient Temperature Range -------------------------------------------------------------------------------------- -40°C to +85°C
Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------------ +4.5V to +5.5V
Electrical Characteristics
(5VSB = 5V, TA = 25OC, unless otherwise specified)
Parameter
Symbol Test Conditions
Min Typ Max Units
Supply Input 5VSB
Suppy Input Voltage Range
Under Voltage Lockout
UVLO Hysteresis
4.5
--
--
5.5
4.5
--
V
V
VUVLO 5VSB rising
4.3
80
--
mV
uA
Shutdown Current
ISD
IQ
No load on VOUT, Disabled
--
0.01
1
No load on VOUT, Enabled, S3# = 0,
5VCC = 0V
Quiescent Current
--
50
70
uA
Supply Input 5VCC
Supply Input Voltage Range
Under Voltage Lockout
UVLO Hysteresis
4.5
--
--
5.5
4.5
--
V
V
VUVLO 5VCC rising
4.3
80
--
mV
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uP7536
Electrical Characteristics
Parameter
Symbol
Test Conditions
Min
Typ Max Units
Enable Control
High Level Threshold
Low Level Threshold
Enable Pin Input Current
1.2
--
--
--
--
--
0.4
1
V
V
-1
uA
Enable threshold to VOUT starting to
ramp up
--
Enable Delay
TD_EN
0.15
1
ms
Power Switch for 5VSB (Q2)
N-MOSFET ON Restiance
Leakage Current
RDS(ON) IOUT = 100mA
VOUT connected to GND, Disabled
VOUT = 5.5V, 5VSB = 0V
--
--
--
400
--
500
1
mΩ
uA
Reverse Leakge Current
Power Switch for 5VCC (Q1)
N-MOSFET ON Restiance
Leakage Current
--
1
uA
RDS(ON) IOUT = 1A @ 25OC
--
--
--
80
--
100
1
mΩ
uA
5VCC = 5.5V, VOUT = 0V, Disabled
VOUT = 5.5V, 5VCC = 0V, Disabled
Reverse Leakge Current
Current Limit
--
1
uA
for uP7536A
for uP7536B
300
750 1500
Current Limit Threshold for Q2
mA
500 1000 1500
Current Limit Threshold for Q1
OC# Ouptut Low Voltage
Off State Current
1.7
--
2.3
--
4.6
0.4
1
A
V
IOC# = 5mA
VOC# = 5.5V
--
--
uA
ms
us
OC# assertion
OC# de-assertion
4
8
15
OC# Deglitch
150
250
500
Softstart
S3# = 0V, COUT = 10uF, No Load
--
--
1.3
1.3
--
--
ms
ms
Output Voltage Ramp Up Time
S3# = 5VCC = 5V, COUT = 10uF, No
Load
Over Temperature Protection
Thermal Shutdown Threshold Level
Thermal Shutdown Hysteresis
By Design
By Design
--
--
135
30
--
--
OC
OC
Note 1. Stresses beyond those listed as the above Absolute Maximum Ratings may cause permanent damage to
the device. These are for stress ratings only. Functional operation of the device at these or any other
conditions beyond those indicated in the Recommended Operation Condition section of the specifications is
not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility
to affect device reliability.
Note 2. Devices are ESDsensitive. Handling precaution recommended.
Note 3. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. These items are not tested in production, specified by design.
uP7536-DS-F0101, Jul. 2012
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7
uP7536
Typical Operation Characteristics
Trun On into 5VSB
Trun On into 5VCC
VOUT
VOUT
2V/Div
2V/Div
EN
EN
1V/Div
1V/Div
Time (250us/Div)
Time (250us/Div)
COUT = 1uF, S3# = 0V
COUT = 1uF, S3# = 5V
S3# form High to Low
S3# from Low to High
VOUT
1V/Div
VOUT
1V/Div
S3#
1V/Div
S3#
1V/Div
ISB
ICC
100mA/Div
ICC
ISB
100mA/Div
100mA/Div
100mA/Div
Time (10us/Div)
Time (500us/Div)
COUT = 1uF, IOUT = 100mA
COUT = 1uF, IOUT = 100mA
OCP for 5VSB
OCP for 5VCC
OC#
5V/Div
OC#
5V/Div
VOUT
5V/Div
VOUT
5V/Div
IOUT
IOUT
200mA/Div
1A/Div
Time (2ms/Div)
COUT = 10uF, S3# = Low
Time (2ms/Div)
COUT = 10uF, S3# = High
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uP7536
Typical Operation Characteristics
POR Threshold Level vs. Temperature
Control Input Level vs. Temperature
4.4
4.35
4.3
1.2
1.1
5VSB/5VCC
Rising
1
EN/S3#
Rising
0.9
4.25
4.2
0.8
0.7
EN/S3#
Falling
0.6
4.15
4.1
5VSB/5VCC
Falling
0.5
0.4
0.3
0.2
4.05
4
-50
0
50
100
150
-50
0
50
100
150
Junction Temperature (OC)
Junction Temperature (OC)
Q1 On Resistance vs. Temperature
Q2 On Resistance vs. Temperature
120
100
80
60
40
20
0
700
600
500
400
300
200
100
0
-50
0
50
100
150
-50
0
50
100
150
Junction Temperature (OC)
Junction Temperature (OC)
5VCC Q1 Current Limit vs. Temperature
5VSB Q2 Current Limit vs. Temperature
1500
1300
1100
900
4.7
4.2
3.7
3.2
2.7
2.2
1.7
700
500
300
-50
0
50
100
150
-50
0
50
100
150
Junction Temperature (OC)
Junction Temperature (OC)
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9
uP7536
Typical Operation Characteristics
Quiescent Current vs. Temperature
70
60
50
40
30
20
10
0
-50
0
50
100
150
Junction Temperature (OC)
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uP7536
Application Information
The uP7536 is a current limited power multiplexer acting
as a high side switch for USB applications where heavy
capacitive loads and short-circuits are likely to be countered.
It switches output voltage to 5VSB at S3/S4/S5 states
with 450mΩ switch and 200mA capability; to 5VCC at S0/
S1/S2 states with 90mΩ switch and 1.5A capability.
EN
(5V/Div)
This device features an active-high enable control input.
Soft start function limits the inrush current from supply
input when enabled. Disabling the device reduces its
standby current down to less than 1uA. Optimal switch
logic according to S3# and 5VCC status ensures seamless
output voltage transition. When the output load exceeds
the current-limit threshold or a short is present, the uP7536
asserts overcurrent protection and limits the output current
to a safe level by driving the power switches into saturation
mode.
OC#
(5V/Div)
VOUT
(5V/Div)
ISB
(400mA/Div)
Time: 5ms/Div
Figure 1. Turn on into 5VSB with 2000uF output capacitor.
Other features include soft-start to limit inrush current
during plug-in, thermal shutdown to prevent catastrophic
switch failure from high-current loads, under-voltage lockout
(UVLO) to ensure that the device remains off unless there
is a valid input voltage present. The uP7536 is available in
SOT23-8, (P)SOP-8, and MSOP-8 package.
Hot Plug Application
The output voltage undergoes an abrupt drop when a device
with large input capacitors is hot plugged into the output of
uP7536 as shown in Figure 2, where a device with 1500uF
is hot plugged into uP7536 output with 470uF output
capacitor. The output voltage ramp up time is controlled by
the current limit level. The OC# is not pulled low since the
output voltage is kept higher than 2.0V before the delay
time.
Input and output capacitors
Bypass the supply input pins with a single 4.7uF capacitor
as close as possible to the uP7536.A4.7uF output capacitor
at the output pin is recommended even much larger output
capacitors are already available at the output of the uP7536,
especially if the output capacitors are more than 2 inches
away on the PCB. The inrush current to charge the output
capacitors is calculated as:
VOUT
OC#
(2V/Div)
IIN = COUT
×
(A)
TSS
Special care should be paid to large output capacitor
applications. Take COUT = 1000uF as example, the inrush
current is IIN = 1000uF x 5V / 1.3ms = 3.8A. This is higher
than the current limit threshold of Q1 and Q2. In this case,
the output voltage ramp up time is controlled by the current
limit function of Q1 and Q2. Fault indication function may
be false triggered and pull low the OC# as shown in Figure
1. The OC# is pulled low after 8ms delay and released
when VOUT > 2V.
VOUT
(2V/Div)
ISB
(200mA/Div)
Time: 5ms/Div
Figure 2. Hot plug application with S3# = 0V.
Thermal Consideration
Temperature effect should be well considered when dealing
with voltage drop and power dissipation. The maximum
RDS(ON) of the power switch is 90mΩ of Q1 under 25OC
junction temperature. If the device is expected to operate
uP7536-DS-F0101, Jul. 2012
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11
uP7536
Application Information
at 125OC junction temperature, the RDS(ON) of Q1 will become
90mΩ * (1 + (125OC - 25OC) * 0.5%/OC) = 135mΩ
where 0.5%/OC is the approximated temperature coefficient
of the RDS(ON).
If the maximum load current is expected to be 1.2A, the
maximum voltage will become
1.2A * 100mΩ = 120mV
This in turn will cause power dissipation as
1.2A * 120mV = 144mW
The temperature raise is calculated as
144mW * 250OC/W = 36OC
The junction temperature is calculated as TA + 36OC, where
TA is the expected maximum ambient temperature. A few
iterations are required until get final solutions.
PCB Layout Consideration
Place the uP7536 as close to the USB connector as
possible to minimize the parasitic elements.
Keep the power trace short and wide to minimize the
parasitic resistance along the trace.
Place the bypassing capacitor as close to the device
as possible.
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uP7536
Package Information
SOT23-8L
0.45 ± 0.05
0.65 ± 0.05
2.80 - 3.00
0.65 BSC
0.22 - 0.38
Recommended Solder Pad Layout
1.45 MAX
0.08 - 0.22
0.00 - 0.15
1.95 BSC
0.30 - 0.60
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
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uP7536
Package Information
SOP- 8L
0.70 ± 0.10
1.27
± 0.10
4.80 - 5.00
1.27 BSC
0.31 - 0.51
Recommended Solder Pad Layout
0.10 - 0.25
1.75 MAX
0.10 - 0.25
0.40 - 1.27
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
14
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uP7536
Package Information
PSOP- 8L
4.80 - 5.00
2.60 - 3.40
0.70 ± 0.10
1.27
± 0.10
3.20 ± 0.10
1.27 BSC
0.31 - 0.51
Recommended Solder Pad Layout
0.10 - 0.25
1.70 MAX
0.00 - 0.15
0.40 - 1.27
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
uP7536-DS-F0101, Jul. 2012
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15
uP7536
Package Information
MSOP- 8L
0.35 REF
1.00 REF
2.90 - 3.10
0.65 REF
0.65 BSC
0.22-0.38
Recommended Solder Pad Layout
0.75 - 0.95
0.08-0.23
1.10 MAX
0.40 - 0.80
0.00 - 0.15
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
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uP7536
Important Notice
uPI and its subsidiaries reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products
and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information
before placing orders and should verify that such information is current and complete.
uPI products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment. However, no responsibility
is assumed by uPI or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of uPI or its subsidiaries.
COPYRIGHT (C) 2009, UPI SEMICONDUCTOR CORP.
uPI Semiconductor Corp.
Sales Branch Office
uPI Semiconductor Corp.
Headquarter
12F-5, No. 408, Ruiguang Rd. NeihuDistrict,
Taipei Taiwan, R.O.C.
TEL : 886.2.8751.2062 FAX : 886.2.8751.5064
9F.,No.5, Taiyuan 1st St. Zhubei City,
Hsinchu Taiwan, R.O.C.
TEL : 886.3.560.1666 FAX : 886.3.560.1888
uP7536-DS-F0101, Jul. 2012
www.upi-semi.com
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