STM4820 był np,. w PSU B44-00264A (PSIV231I01A) scalaki :FAN7530, STR-W6252, KIA393F, STM4820, SEM2006 To jakiś klucz podający nap. 5,3v po zał. invertera http://obrazki.elektroda.pl/4886730100_1356972498_thumb.jpg Co do STR-W6052 (6053) http://www.sanken-ele.co.jp/prod/semicon/pdf/DSP12_W6053S.pdf
STR-W605xS
Current Mode Control PWM Regulator IC
For Switching Power Supplies
Features and Benefits
Description
▪ TO-220F power package with 30 to 90 W power output
▪ Current Mode PWM control
▪ Built-in Random Switching function, reducing EMI noise,
and simplifying EMI filters, and therefore reducing cost
▪ Built-in Slope Compensation function, avoiding
subharmonic oscillation
▪ Built-in Auto Standby function (Input Power, PIN & lt; 30 mW
at no load)
▫ Normal operation: PWM mode
▫ Light load operation: Standby mode (burst oscillation)
▪ Built-in Audible Noise Suppression function during
Standby mode
▪ Built-in Startup Circuit, reducing power consumption in
standby operation, and eliminating external components.
▪ Bias-Assist function, improving startup operation,
suppressing VCC voltage drop in operation, and allowing
use of smaller VCC capacitor
▪ Built-in Leading Edge Blanking function
The STR-W605xS series are power ICs for switching power
supplies, incorporating a power MOSFET and a current mode
PWM controller IC. Including a startup circuit and a standby
function in the controller, the product achieves low power
consumption, low standby power, and high cost-effectiveness
power supply systems with few external components.
Continued on the next page…
Package: 6-Pin fully molded
TO-220F-6L (FM207)
The STR-W605xS internal MOSFET has a VDSS of 650 V (min),
and an RDS(on) of 1.9 Ω (max) to 3.95 Ω (max) with a frequency
of 67 kHz. Power output is rated at 45 to 90 W at 230 VAC
input and 30 to 60 W at wide input range (85 to 265 VAC).
The device is provided in an industry-standard TO-220 package,
with heatsink mounting flange and pin 2 removed for increased
supply isolation.
Applications:
For switching power supplies used in:
• White goods
• Consumer electronics
• Office automation
• Industrial equipment
• Communication equipment
Not to scale
Typical Application
VOU T
VAC
GND
D/ST
S/ OCP
V CC
GND
FB/OLP
BR
STR-W6000S
1
3 4 5 6 7
Brown-In/Brown-Out function
disabled by connecting BR
terminal to GND.
STR-W605xS-DS
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Features and Benefits (continued)
▪ Two-chip structure, with a controller and a power MOSFET
compensation circuit to minimize OCP point variation on
with guaranteed avalanche energy available to simplify surge
AC input voltage
absorber circuits
▫ Overload Protection function (OLP): auto-restart, built-in
▪ Protection functions:
timer, reduces heat during overload condition, and no external
▫ Brown-In and Brown-Out Protection function: auto-restart,
components required
prevention of excess input current and heat rise at low
▫ Overvoltage Protection function (OVP): Auto-restart
input voltage
▫ Overcurrent Protection function (OCP): pulse-by-pulse built-in ▫ Thermal Shutdown Protection function (TSD): Auto-restart
Selection Guide
Part Number
fOSC
(kHz)
MOSFET
VDSS(min)
(V)
67
650
STR-W6051S
STR-W6052S
STR-W6053S
RDS(on)
(max)
(Ω)
POUT*
(W)
230 V
Package
Packing
Wide
3.95
45
30
2.8
60
40
1.9
90
60
TO-220F-6L (Sanken FM207)
with pin 2 removed
50 pieces per tube
* The listed output power is based on the package thermal ratings, and the peak output power can be 120% to 140% of the
value stated here. At low output voltage and short duty cycle, the output power may be less than the value stated here.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Absolute Maximum Ratings1 Valid at TA = 25°C, unless otherwise specified
Characteristic
A
9.5
A
1–3
5.0
A
STR-W6052S
1–3
7.0
A
1–3
9.5
A
1–3
47
mJ
STR-W6052S
1–3
62
mJ
1–3
86
mJ
1–3
2.0
A
STR-W6052S
1–3
2.3
A
STR-W6053S
ILpeak
Single pulse, VDD = 99 V,
L = 20 mH
7.0
1–3
STR-W6051S
Single Pulse Avalanche Energy4
1–3
STR-W6053S
Single pulse, VDD = 99 V,
L = 20 mH
STR-W6052S
STR-W6051S
EAS
TA = –20°C to 125°C
A
STR-W6053S
IDMAX
Notes
Single pulse
Unit
5.0
STR-W6051S
Maximum Switching Current3
IDpeak
Rating
1–3
STR-W6053S
Drain Peak
Terminals
STR-W6051S
Current2
Symbol
1–3
2.7
A
S/OCP Terminal Voltage
VOCP
3–5
–2 to 6
V
Controller IC (MIC) Supply Input Voltage
VCC
4–5
32
V
FB/OLP Terminal Voltage
VFB
6–5
–0.3 to 14
V
FB/OLP Terminal Sink Current
IFB
6–5
1.0
mA
BR Terminal Voltage
VBR
7–5
–0.3 to 7
V
BR Terminal Sink Current
IBR
MOSFET Power Dissipation5
PD1
Controller IC (MIC) Power Dissipation
PD2
Internal Frame Temperature in Operation
7–5
TF
mA
1–3
22.3
W
STR-W6052S
1–3
23.6
W
STR-W6053S
With infinite heatsink
1.0
STR-W6051S
1–3
26.5
W
Without heatsink
1–3
1.3
W
Specified by VCC × ICC
4–5
0.13
W
–
–20 to 115
°C
–
–20 to 115
°C
Maximum recommended
internal leadframe
temperature, TF(max) = 105°C
Operating Ambient Temperature
TOP
Storage Temperature
Tstg
–
–40 to 125
°C
Channel Temperature
Tch
–
150
°C
1Current
characteristics are defined based on IC as sink ( +), or source ( –).
2Refer to MOSFET Safe Operating Area Curve.
3I
DMAX is the drain current on the D/ST pin determined by the drive voltage of the IC and the threshold voltage, Vth , of the MOSFET.
4Refer to MOSFET Avalanche Energy Derating Coefficient Curve.
5Refer to MOSFET Temperature versus Power Dissipation Curve.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Functional Block Diagram
4
VCC
Startup
UVLO
7
BR
REG
VREG
OVP
D/ST
1
TSD
Brown-In/
Brown-Out
PWM OSC
DRV
SQ
R
OCP
VCC
Drain Peak Current
Compe nsa tion
OLP
Fe edback
Control
FB/OLP
6
3
LEB
S/OCP
GND
Slope
Compensation
5
Pin-out Diagram
Terminal List Table
Number
Name
1
D/ST
Function
MOSFET drain, and input for startup current
2
–
3
S/OCP
(Pin removed)
4
VCC
Input for power supply for control circuit
5
GND
Ground
6
FB/OLP
7
BR
MOSFET source, and input for Overcurrent Protection detection signal
Input for constant voltage control signal, and input for Overload Protection signal
Input for Brown-In and Brown-Out Protection detection voltage
1 2 3 4 5 6 7
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
STR-W605xS
Current Mode Control PWM Regulator IC
For Switching Power Supplies
Electrical Characteristics1 Valid at VCC = 18 V, TA = 25°C, unless otherwise specified
Characteristic
Symbol
Terminal
Min.
Typ.
Max.
Unit
Operation Start Voltage
VCC(ON)
4–5
13.8
15.3
16.8
V
Operation Stop Voltage2
VCC(OFF)
4–5
7.3
8.1
8.9
V
ICC(ON)
4–5
–
–
2.5
mA
Minimum Startup Voltage
VST(ON)
4–5
–
40
–
V
Startup Current
ISTARTUP
4–5
–3.9
–2.5
–1.1
mA
Startup Current Supply Threshold Voltage2
VCC(BIAS)
4–5
8.5
9.5
10.5
V
fOSC(av)
1–5
60
67
74
kHz
Circuit Current in Operation
Average Switching Frequency
Switching Frequency Variance Range
∆f
1–5
–
5
–
kHz
DMAX
1–5
63
71
79
%
Leading Edge Blanking Time
tBW
–
–
390
–
ns
OCP Compensation Coefficient
DPC
–
–
18
–
mV/μs
Maximum Duty Cycle
DDPC
–
–
36
–
%
OCP Threshold Voltage at Zero Duty Cycle
Maximum Duty Cycle for OCP Compensation
VOCP(L)
3–5
0.70
0.78
0.86
V
OCP Threshold Voltage at 36% Duty Cycle
VOCP(H)
3–5
0.79
0.88
0.97
V
Maximum Feedback Current
IFB(MAX)
6–5
–340
–230
–150
μA
Minimum Feedback Current
IFB(MIN)
6–5
–30
–15
–7
μA
Oscillation Stop FB/OLP Voltage
VFB(OFF)
6–5
0.85
0.95
1.05
V
OLP Threshold Voltage
VFB(OLP)
6–5
7.3
8.1
8.9
V
Operation Current After OLP
ICC(OLP)
4–5
–
300
–
μA
tOLP
1–5
54
68
82
ms
VFB(CLAMP)
6–5
11
12.8
14
V
VBR(IN)
7–5
5.2
5.6
6
V
V
OLP Delay Time
FB/OLP Terminal Clamp Voltage
Brown-In Threshold Voltage
Brown-Out Threshold Voltage
VBR(OUT)
7–5
4.45
4.8
5.15
VBR(CLAMP)
7–5
6
6.4
7
V
BR Function Disabling Threshold
VBR(DIS)
7–5
0.3
0.48
0.7
V
OVP Threshold Voltage
VCC(OVP)
4–5
26
29
32
V
TJ(TSD)
–
130
–
–
°C
BR Terminal Clamp Voltage
Thermal Shutdown Operating Temperature
1Current
characteristics are defined based on IC as sink ( +), or source ( –).
VCC(OFF).
2V
CC(BIAS) & gt;
MOSFET Electrical Characteristics Valid at TA = 25°C, unless otherwise specified
Characteristic
Symbol
Device
Terminal
Min.
Typ.
Drain-to-Source Breakdown Voltage
VDSS
–
1–3
650
–
–
V
Drain Leakage Current
IDSS
–
1–3
–
–
300
μA
STR-W6051S
1–3
–
–
3.95
Ω
STR-W6052S
1–3
–
–
2.8
Ω
STR-W6053S
1–3
–
–
1.9
Ω
–
1–3
–
–
250
ns
STR-W6051S
–
–
–
2.63
°C/W
STR-W6052S
–
–
–
2.26
°C/W
STR-W6053S
–
–
–
1.95
°C/W
On-Resistance
RDS(on)
Switching Time
tf
Thermal Resistance*
RθchF
Max.
Unit
*Between channel and internal frame.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Characteristic Performance
STR-W6051S
MOSFET Safe Operating Area Curve
100
TA = 25°C;
Single pulse
100
Drain current limited
by on-resistance
10
80
Drain Current, ID (A)
Safe Operating Area
Temperature Derating Coefficient (%)
S. O. A. Temperature Derating Coefficient Curve
60
40
20
0.1 ms
1 ms
1
0.1
0
0
20
40
60
80
100
120
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
Internal Frame Temperature, TF (°C)
0.01
1
10
100
1000
Drain-to-Source Voltage, VDS (V)
100
80
60
40
20
0
25
50
75
100
125
MOSFET Temperature versus Power Dissipation Curve
Allowable Power Dissipation, PD1 (W)
EAS
Temperature Derating Coefficient (%)
MOSFET Avalanche Energy Derating Coefficient Curve
150
25
With infinite heatsink
PD1 = 22.3 W at TA ≤ 25°C
20
15
10
5
0
Without heatsink
PD1 = 1.3 W at TA ≤ 25°C
0
Channel Temperature, Tch (°C)
40
60
80
100 120 140 160
Transient Thermal Resistance Curve
10
Transient Thermal
Resistance, Rθch-c (°C/W)
20
Ambient Temperature, TA (°C)
1
0.1
0.01
10-6
10-5
10-4
10-3
10-2
10-1
Time (s)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Characteristic Performance
STR-W6052S
MOSFET Safe Operating Area Curve
100
TA = 25°C;
Single pulse
Drain current limited
by on-resistance
100
0.1 ms
10
80
Drain Current, ID (A)
Safe Operating Area
Temperature Derating Coefficient (%)
S. O. A. Temperature Derating Coefficient Curve
60
40
20
1 ms
1
0.1
0
0
20
40
60
80
100
120
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
Internal Frame Temperature, TF (°C)
0.01
1
10
100
1000
Drain-to-Source Voltage, VDS (V)
100
80
60
40
20
0
25
50
75
100
125
MOSFET Temperature versus Power Dissipation Curve
Allowable Power Dissipation, PD1 (W)
EAS
Temperature Derating Coefficient (%)
MOSFET Avalanche Energy Derating Coefficient Curve
150
25
With infinite heatsink
PD1 = 23.6 W at TA ≤ 25°C
20
15
10
5
0
Without heatsink
PD1 = 1.3 W at TA ≤ 25°C
0
Channel Temperature, Tch (°C)
40
60
80
100 120 140 160
Transient Thermal Resistance Curve
10
Transient Thermal
Resistance, Rθch-c (°C/W)
20
Ambient Temperature, TA (°C)
1
0.1
0.01
10-6
10-5
10-4
10-3
10-2
10-1
Time (s)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Characteristic Performance
STR-W6053S
MOSFET Safe Operating Area Curve
100
TA = 25°C;
Single pulse
Drain current limited
by on-resistance
100
0.1 ms
10
80
Drain Current, ID (A)
Safe Operating Area
Temperature Derating Coefficient (%)
S. O. A. Temperature Derating Coefficient Curve
60
40
20
1 ms
1
0.1
0
0
20
40
60
80
100
120
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
Internal Frame Temperature, TF (°C)
0.01
1
10
100
1000
Drain-to-Source Voltage, VDS (V)
100
80
60
40
20
0
25
50
75
100
125
MOSFET Temperature versus Power Dissipation Curve
Allowable Power Dissipation, PD1 (W)
EAS
Temperature Derating Coefficient (%)
MOSFET Avalanche Energy Derating Coefficient Curve
150
30
With infinite heatsink
PD1 = 26.5 W at TA ≤ 25°C
25
20
15
10
Without heatsink
PD1 = 1.3 W at TA ≤ 25°C
5
0
0
Channel Temperature, Tch (°C)
40
60
80
100 120 140 160
Transient Thermal Resistance Curve
10
Transient Thermal
Resistance, Rθch-c (°C/W)
20
Ambient Temperature, TA (°C)
1
0.1
0.01
10-6
10-5
10-4
10-3
10-2
10-1
Time (s)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
8
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Typical Application
VOU T
VAC
GND
D/ST
S/ OCP
V CC
GND
FB/OLP
BR
STR-W6000S
1
3 4 5 6 7
Brown-In/Brown-Out function
enabled by connecting BR
terminal to resistive divider.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
9
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Package Outline Drawing, TO-220F-6L (FM207)
10.0±0.2
4.2±0.2
Gate burr
φ3.2±0.2
7.9±0.2
16.9±0.3
4±0.2
0.5
2.8±0.2
STR
a
b
R-end
(5.4)
)
-R1
(2
6-0.65 +0.2
-0.1
6×P1.27±0.15=7.62±0.15
Dimensions between roots
10.4±0.5
6-0.74±0.15
5.0±0.5
2.8
2.6±0.1
Dimensions from root
0.45 +0.2
-0.1
5.08±0.6
Dimensions between roots
0.5
1 2 3 4 5 6 7
Leadform: 2003
Material of terminal: Cu
Treatment of terminal: Solder plating (Pb-free)
Weight: Approximately 2.3 g
Dashed line at Gate Burr indicates
protrusion of 0.3 mm (max)
Unit: mm
0.5
Plan view
0.5
0.5
Side view
a. Type Number: W6051S
b. Lot Number:
1st letter: Last digit of year
2nd letter: Month
1 to 9 for Jan. to Sept.
O for Oct.
N for Nov.
D for Dec.
3rd and 4th letter: Day of month
5th letter: Sanken Registration Number
Leadframe plating Pb-free. Device composition
compliant with the RoHS directive.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
10
STR-W605xS
Current Mode Control PWM Regulator IC
For Switching Power Supplies
Packing Specifications
+0.4
0
1.4
5.1
9 × R0.6
35.0
(15.4)
9.5–0.1
+0.3
8.9
4.8
Side marked
“ANTISTATIC”
2.85
+0.3
(3.6)
1.3 –0.2
14.3
Tube dimensions (mm)
Spacer
Carton
(side
view)
620
Tube
Tube
125
Spacer
185
Carton dimensions (mm)
Capacity:
36 tubes per carton (3 rows, 12 tubes per row)
50 pieces per tube
1800 pieces maximum per carton
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
Current Mode Control PWM Regulator IC
For Switching Power Supplies
STR-W605xS
Because reliability can be affected adversely by improper storage
environments and handling methods, please observe the following
cautions.
Cautions for Storage
•
Ensure that storage conditions comply with the standard
temperature (5°C to 35°C) and the standard relative humidity
(around 40% to 75%); avoid storage locations that experience
extreme changes in temperature or humidity.
•
Avoid locations where dust or harmful gases are present and
avoid direct sunlight.
•
Reinspect for rust on leads and solderability of products that have
been stored for a long time.
Cautions for Testing and Handling
When tests are carried out during inspection testing and other
standard test periods, protect the products from power surges
from the testing device, shorts between the product pins, and
wrong connections.
Remarks About Using Silicone Grease with a Heatsink
• When silicone grease is used in mounting this product on a
heatsink, it shall be applied evenly and thinly. If more silicone
grease than required is applied, it may produce excess stress.
• Volatile-type silicone greases may crack after long periods of
time, resulting in reduced heat radiation effect. Silicone grease
with low consistency (hard grease) may cause cracks in the mold
resin when screwing the product to a heatsink.
• Our recommended silicone greases for heat radiation purposes,
which will not cause any adverse effect on the product life, are
indicated below:
Type
Suppliers
G746
Shin-Etsu Chemical Co., Ltd.
YG6260
Momentive Performance Materials Holding, Inc.
SC102
Soldering
•
Leadframe temperature, TF , should not exceed 115°(max)
•
When soldering the products, please be sure to minimize the
working time, within the following limits:
260±5°C 10 s
350±5°C 3 s (solder iron)
• To avoid an internal chip damaged, soldering on each of lead-pins
should be at a distance of at least 2 mm away from the body of
the products
Assembly
•
Recommended screw torque through the mounting tab is 0.588 to
0.785 N • m (6 to 8 kgf • cm).
Electrostatic Discharge
•
When handling the products, the operator must be grounded.
Grounded wrist straps worn should have at least 1 MΩ of
resistance from the operator to ground to prevent shock hazard,
and it should be placed near the operator.
•
Workbenches where the products are handled should be
grounded and be provided with conductive table and floor mats.
•
When using measuring equipment such as a curve tracer, the
equipment should be grounded.
•
When soldering the products, the head of soldering irons or the
solder bath must be grounded in other to prevent leak voltages
generated by them from being applied to the products.
•
The products should always be stored and transported in Sanken
shipping containers or conductive containers, or be wrapped in
aluminum foil.
Dow Corning Toray Co., Ltd.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
12
STR-W605xS
Current Mode Control PWM Regulator IC
For Switching Power Supplies
The products described herein are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc.
Sanken and Allegro reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Therefore, the user is cautioned to verify that the information in this
publication is current before placing any order.
When using the products described herein, the applicability and suitability of such products for the intended purpose shall be reviewed at the users
responsibility.
Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the products herein and
Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or any other rights of Sanken,
Allegro, or any third party which may result from its use.
When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically or otherwise
processing or treating the products, please duly consider all possible risks that may result from all such uses in advance and proceed therewith at your
own responsibility.
Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products
at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the
equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction.
Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Please return to us this document with your
signature(s) or seal(s) prior to the use of the products herein.
When considering the use of Sanken products in the applications where higher reliability is required (traffic signal control systems o equipment, fire/
crime alarm systems, various safety devices, etc.), please contact your nearest Sanken sales representative to discuss, and then return to us this document with your signature(s) or seal(s) prior to the use of the products herein.
The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited.
Anti radioactive ray design is not considered for the products listed herein.
The information included herein is believed to be accurate and reliable. Application and operation examples described in this publication are given
for reference only and Sanken and Allegro assume no responsibility for any infringement of industrial property rights, intellectual property rights, or
any other rights of Sanken or Allegro or any third party that may result from its use. The contents in this document must not be transcribed or copied
without Sanken’s written consent.
Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken's distribution network.
Copyright © 2011 Allegro MicroSystems, Inc.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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