ON MC34063AMR2 Dc-to-dc converter control circuit Datasheet

MC34063A, MC33063A
DC-to-DC Converter
Control Circuits
The MC34063A Series is a monolithic control circuit containing the
primary functions required for DC–to–DC converters. These devices
consist of an internal temperature compensated reference, comparator,
controlled duty cycle oscillator with an active current limit circuit,
driver and high current output switch. This series was specifically
designed to be incorporated in Step–Down and Step–Up and
Voltage–Inverting applications with a minimum number of external
components. Refer to Application Notes AN920A/D and AN954/D
for additional design information.
•
•
•
•
•
•
•
Operation from 3.0 V to 40 V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5 A
Output Voltage Adjustable
Frequency Operation to 100 kHz
Precision 2% Reference
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PDIP–8
P, P1 SUFFIX
CASE 626
8
1
8
1
8
1
SO–8
D SUFFIX
CASE 751
SOEIAJ–8
M SUFFIX
CASE 968
PIN CONNECTIONS
Representative Schematic Diagram
1
Drive 8
Collector
Q2
S Q
R
Ipk 7
Sense
100
6
2
3
Comparator
+
-
Comparator 5
Inverting
Input
1
8
Driver
Collector
Switch
Emitter
2
7
Ipk Sense
Timing
Capacitor
3
6
VCC
Gnd
4
5
Comparator
Inverting
Input
(Top View)
Q1
Ipk
Oscillator CT
VCC
Switch
Collector
Switch
Collector
1.25 V
Reference
Regulator
Switch
Emitter
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
Timing
Capacitor
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 11 of this data sheet.
4
Gnd
(Bottom View)
This device contains 51 active transistors.
 Semiconductor Components Industries, LLC, 2000
August, 2000 – Rev. 6
1
Publication Order Number:
MC34063A/D
MC34063A, MC33063A
MAXIMUM RATINGS
Symbol
Value
Unit
Power Supply Voltage
Rating
VCC
40
Vdc
Comparator Input Voltage Range
VIR
–0.3 to +40
Vdc
Switch Collector Voltage
VC(switch)
40
Vdc
Switch Emitter Voltage (VPin 1 = 40 V)
VE(switch)
40
Vdc
Switch Collector to Emitter Voltage
VCE(switch)
40
Vdc
Driver Collector Voltage
VC(driver)
40
Vdc
Driver Collector Current (Note 1.)
IC(driver)
100
mA
ISW
1.5
A
PD
RθJA
1.25
100
W
°C/W
PD
RθJA
625
160
W
°C/W
Operating Junction Temperature
TJ
+150
°C
Operating Ambient Temperature Range
MC34063A
MC33063AV
MC33063A
TA
Storage Temperature Range
Tstg
Switch Current
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
TA = 25°C
Thermal Resistance
SOIC Package, D Suffix
TA = 25°C
Thermal Resistance
°C
0 to +70
–40 to +125
–40 to +85
1. Maximum package power dissipation limits must be observed.
2. ESD data available upon request.
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2
–65 to +150
°C
MC34063A, MC33063A
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 3.], unless otherwise specified.)
Characteristics
Symbol
Min
Typ
Max
Unit
fosc
24
33
42
kHz
OSCILLATOR
Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C)
Ichg
24
35
42
µA
Idischg
140
220
260
µA
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C)
Idischg/Ichg
5.2
6.5
7.5
–
Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)
Vipk(sense)
250
300
350
mV
Saturation Voltage, Darlington Connection
( ISW = 1.0 A, Pins 1, 8 connected)
VCE(sat)
–
1.0
1.3
V
Saturation Voltage (Note 5.)
(ISW = 1.0 A, RPin 8 = 82 Ω to VCC, Forced β 20)
VCE(sat)
–
0.45
0.7
V
hFE
50
75
–
–
IC(off)
–
0.01
100
µA
1.225
1.21
1.25
–
1.275
1.29
–
–
1.4
1.4
5.0
6.0
IIB
–
–20
–400
nA
ICC
–
–
4.0
mA
Charge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C)
OUTPUT SWITCH (Note 4.)
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)
Collector Off–State Current (VCE = 40 V)
COMPARATOR
Threshold Voltage
TA = 25°C
TA = Tlow to Thigh
Vth
Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V)
MC33063A, MC34063A
MC33363AV
V
Regline
Input Bias Current (Vin = 0 V)
mV
TOTAL DEVICE
Supply Current (VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC,
VPin 5 > Vth, Pin 2 = Gnd, remaining pins open)
3. Tlow = 0°C for MC34063A, –40°C for MC33063A, AV
Thigh = +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents
(≥ 30 mA), it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, and is
magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a
non–Darlington configuration is used, the following output drive condition is recommended:
IC output
Forced of output switch :
10
IC driver – 7.0 mA *
* The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
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3
1000
VCC = 5.0 V
Pin 7 = VCC
Pin 5 = Gnd
TA = 25°C
200
100
50
ton
20
10
5.0
toff
2.0
1.0
0.01 0.02
0.05 0.1 0.2
0.5 1.0 2.0
CT, OSCILLATOR TIMING CAPACITOR (nF)
200 mV/DIV
500
V OSC, OSCILLATOR VOLTAGE (V)
t on-off , OUTPUT SWITCH ONOFF TIME ( µs)
MC34063A, MC33063A
5.0 10
10 µs/DIV
Figure 1. Output Switch On–Off Time versus
Oscillator Timing Capacitor
Figure 2. Timing Capacitor Waveform
VCE(sat), SATURATION VOLTAGE (V)
VCE(sat), SATURATION VOLTAGE (V)
1.8
1.7
1.6
1.5
1.4
1.3
VCC = 5.0 V
Pins 1, 7, 8 = VCC
Pins 3, 5 = Gnd
TA = 25°C
(See Note 6.)
1.2
1.1
1.0
0
0.2
0.4
0.6
0.8
1.0
1.2
IE, EMITTER CURRENT (A)
1.4
1.6
1.1
1.0
0.9
0.7
0.6
0.4
0.3
0.2
0.1
0
0.2
0.4
0.6
0.8
1.0
1.2
IC, COLLECTOR CURRENT(A)
1.4
1.6
3.2
VCC = 5.0 V
Ichg = Idischg
I CC, SUPPLY CURRENT (mA)
VIPK(sense), CURRENT LIMIT SENSE VOLTAGE (V)
0
Forced β = 20
3.6
320
300
280
260
240
220
200
-55
VCC = 5.0 V
Pin 7 = VCC
Pins 2, 3, 5 = Gnd
TA = 25°C
(See Note 6.)
0.5
Figure 4. Common Emitter Configuration Output
Switch Saturation Voltage versus
Collector Current
400
360
340
Darlington Connection
0.8
Figure 3. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current
380
Pins 1, 5, 8 = Open
CT = 1.0 nF
TA = 25°C
VCC = 5.0 V
Pin 7 = VCC
Pin 2 = Gnd
-25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
2.8
2.4
2.0
1.6
1.2
0.4
0
125
CT = 1.0 nF
Pin 7 = VCC
Pin 2 = Gnd
0.8
0
Figure 5. Current Limit Sense Voltage
versus Temperature
5.0
10
15
20
25
30
VCC, SUPPLY VOLTAGE (V)
35
Figure 6. Standby Supply Current versus
Supply Voltage
6. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
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4
40
MC34063A, MC33063A
170 µH
L
1
8
180
S Q
Q2
R
Q1
7
2
Ipk
Rsc
0.22
Vin
12 V
Osc
+
6
CT
3
CT
VCC
100
+
-
Comp.
1N5819
1.25 V
Ref
Reg
5
4
1500
pF
R2
R1
47 k
2.2 k
330
+
1.0 µH
Vout
28 V/175 mA
+
CO
Vout
100
Optional Filter
Test
Conditions
Results
Line Regulation
Vin = 8.0 V to 16 V, IO = 175 mA
30 mV = ±0.05%
Load Regulation
Vin = 12 V, IO = 75 mA to 175 mA
10 mV = ±0.017%
Output Ripple
Vin = 12 V, IO = 175 mA
400 mVpp
Efficiency
Vin = 12 V, IO = 175 mA
87.7%
Output Ripple With Optional Filter
Vin = 12 V, IO = 175 mA
40 mVpp
Figure 7. Step–Up Converter
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MC34063A, MC33063A
8
1
7
Vout
8
7
2
Rsc
Vin
1
R
Vout
2
Rsc
Vin
6
6
R 0 for
constant Vin
Figure 8. External Current Boost Connections for IC Peak Greater than 1.5 A
8a. External NPN Switch
8b. External NPN Saturated Switch
(See Note 7.)
7. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents
(≥ 30 mA), it may take up to 2.0 µs to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, and is magnified
at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a
non–Darlington configuration is used, the following output drive condition is recommended.
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6
MC34063A, MC33063A
8
1
S Q
Q2
Q1
R
7
2
Ipk
Rsc
0.33
Vin
25 V
Osc
6
100
+
CT
1N5819
3
L
CT
VCC
+
-
1.25 V
Ref
Reg
Comp.
5
4
220 µH
470
pF
R1
3.6 k
1.2 k
470
+
1.0 µH
Vout
5.0 V/500 mA
R2
+
CO
Vout
100
Optional Filter
Test
Conditions
Results
Line Regulation
Vin = 15 V to 25 V, IO = 500 mA
12 mV = ±0.12%
Load Regulation
Vin = 25 V, IO = 50 mA to 500 mA
3.0 mV = ±0.03%
Output Ripple
Vin = 25 V, IO = 500 mA
120 mVpp
Short Circuit Current
Vin = 25 V, RL = 0.1 Ω
1.1 A
Efficiency
Vin = 25 V, IO = 500 mA
83.7%
Output Ripple With Optional Filter
Vin = 25 V, IO = 500 mA
40 mVpp
Figure 9. Step–Down Converter
8
1
7
2
7
Vout
Rsc
Vin
1
8
2
Rsc
6
Vin
6
Figure 10. External Current Boost Connections for IC Peak Greater than 1.5 A
10a. External NPN Switch
10b. External PNP Saturated Switch
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7
V
MC34063A, MC33063A
1
8
S Q
Q2
R
Q1
7
2
Ipk
Rsc
0.24
Osc
6
Vin
4.5 V to 6.0 V
100
+
88 µH
L
CT
VCC
3
+
-
Comp.
+
1.25 V
Ref
Reg
5
1500
pF
1N5819
4
R1
R2
953
8.2 k
1.0 µH
Vout
-12 V/100 mA
1000 µf
+
Vout
CO
+
100
Optional Filter
Test
Conditions
Results
Line Regulation
Vin = 4.5 V to 6.0 V, IO = 100 mA
3.0 mV = ±0.012%
Load Regulation
Vin = 5.0 V, IO = 10 mA to 100 mA
0.022 V = ±0.09%
Output Ripple
Vin = 5.0 V, IO = 100 mA
500 mVpp
Short Circuit Current
Vin = 5.0 V, RL = 0.1 Ω
910 mA
Efficiency
Vin = 5.0 V, IO = 100 mA
62.2%
Output Ripple With Optional Filter
Vin = 5.0 V, IO = 100 mA
70 mVpp
Figure 11. Voltage Inverting Converter
8
1
1
Vout
8
7
2
7
Vout
Vin
6
Vin
2
6
Figure 12. External Current Boost Connections for IC Peak Greater than 1.5 A
12a. External NPN Switch
12b. External PNP Saturated Switch
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MC34063A, MC33063A
5.45′′
2.500′′
(Top view, copper foil as seen through the board from the component side)
MC34063A
MC34063A
MC34063A
(Top View, Component Side)
*Optional Filter.
Figure 13. Printed Circuit Board and Component Layout
(Circuits of Figures 7, 9, 11)
INDUCTOR DATA
Converter
Inductance (µH)
Turns/Wire
Step–Up
170
38 Turns of #22 AWG
Step–Down
220
48 Turns of #22 AWG
Voltage–Inverting
88
28 Turns of #22 AWG
All inductors are wound on Magnetics Inc. 55117 toroidal core.
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MC34063A, MC33063A
Calculation
Step–Up
V out V
ton/toff
V
F
in(min)
V sat
in(min)
(ton + toff)
V out V
|V out| V
10–5
Ipk(switch)
2I
out(max)
(V
4.0 x
t on
1
t
off
2I
t
on(max)
10–5
(V
in(min)
I
I
ripple(pp)
(ton + toff) – toff
4.0 x 10–5 ton
ton
2I
out(max)
0.3/Ipk(switch)
I outt on
V
off
ton
1
t
off
(ton + toff) – toff
ton
V sat)
in(min)
I
pk(switch)
9
F
V sat
t on t
off
ton
1
t
off
0.3/Ipk(switch)
in
1
f
t on t
(ton + toff) – toff
4.0 x
V
1
f
off
ton
1
t
off
CT
CO
Voltage–Inverting
F
V sat V out
in(min)
t on t
ton
L(min)
V
Step–Down
1
f
toff
Rsc
V
V sat V out)
pk(switch)
t
(t
t )
pk(switch) on
off
8V
ripple(pp)
on(max)
out(max)
t on
1
t
off
0.3/Ipk(switch)
(V
V sat)
in(min)
I
pk(switch)
9
t
on(max)
I outt on
V
ripple(pp)
Vsat = Saturation voltage of the output switch.
VF = Forward voltage drop of the output rectifier.
The following power supply characteristics must be chosen:
Vin – Nominal input voltage.
Vout – Desired output voltage, |V out| 1.25 1 R2
R1
Iout – Desired output current.
fmin – Minimum desired output switching frequency at the selected values of Vin and IO.
Vripple(pp) – Desired peak–to–peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its
equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the
line and load regulation.
NOTE: For further information refer to Application Note AN920A/D and AN954/D.
Figure 14. Design Formula Table
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MC34063A, MC33063A
ORDERING INFORMATION
Device
Package
Shipping
SO–8
98 Units / Rail
MC33063ADR2
SO–8
2500 Units / Tape & Reel
MC33063AP1
DIP–8
50 Units / Rail
MC33063AVD
SO–8
98 Units / Rail
MC33063AVDR2
SO–8
2500 Units / Tape & Reel
MC33063AVP
DIP–8
50 Units / Rail
MC34063AD
SO–8
98 Units / Rail
MC34063ADR2
SO–8
2500 Units / Tape & Reel
MC34063AP1
DIP–8
50 Units / Rail
MC34063BD
SO–8
98 Units / Rail
MC34063BDR2
SO–8
2500 Units / Tape & Reel
MC33063AD
MC34063AM
SOEIAJ–8
94 Units / Rail
MC34063AMEL
SOEIAJ–8
1000 Units / Tape & Reel
MC34063AML1
SOEIAJ–8
1000 Units / Tape & Reel
MC34063AML2
SOEIAJ–8
2000 Units / Tape & Reel
MC34063AMR1
SOEIAJ–8
1000 Units / Tape & Reel
MC34063AMR2
SOEIAJ–8
2000 Units / Tape & Reel
MARKING DIAGRAMS
PDIP–8
P, P1 SUFFIX
CASE 626
PDIP–8
P, P1 SUFFIX
CASE 626
8
8
3x063AP1
AWL
YYWW
SO–8
D SUFFIX
CASE 751
8
33063AVP
AWL
YYWW
x
z
A
WL, L
YY, Y
WW, W
34063
ALYWz
1
1
= 3 or 4
= A denotes AD suffix
J denotes BD suffix
= Assembly Location
= Wafer Lot
= Year
= Work Week
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11
SOEIAJ–8
M SUFFIX
CASE 968
8
8
3x063
ALYWz
1
1
SO–8
D SUFFIX
CASE 751
M063A
ALYW
1
MC34063A, MC33063A
PACKAGE DIMENSIONS
PDIP–8
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626–05
ISSUE K
8
5
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
–B–
1
4
F
NOTE 2
–A–
DIM
A
B
C
D
F
G
H
J
K
L
M
N
L
C
J
–T–
N
SEATING
PLANE
D
M
K
MILLIMETERS
MIN
MAX
9.40 10.16
6.60
6.10
4.45
3.94
0.51
0.38
1.78
1.02
2.54 BSC
1.27
0.76
0.30
0.20
3.43
2.92
7.62 BSC
10°
0.76
1.01
INCHES
MIN
MAX
0.370 0.400
0.240 0.260
0.155 0.175
0.015 0.020
0.040 0.070
0.100 BSC
0.030 0.050
0.008 0.012
0.115 0.135
0.300 BSC
10°
0.030 0.040
G
H
0.13 (0.005)
A
T
M
M
B
M
SO–8
D SUFFIX
PLASTIC PACKAGE
CASE 751–06
ISSUE T
D
A
8
E
5
0.25
H
1
M
B
M
4
h
B
X 45 e
A
C
SEATING
PLANE
L
0.10
A1
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETER.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
C
B
0.25
M
C B
S
A
S
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12
DIM
A
A1
B
C
D
E
e
H
h
L
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BSC
5.80
6.20
0.25
0.50
0.40
1.25
0
7
MC34063A, MC33063A
SOEIAJ–8
M SUFFIX
PLASTIC PACKAGE
CASE 968–01
ISSUE O
8
LE
5
Q1
E HE
M°
1
4
L
Z
DETAIL P
D
e
A1
A
P
b
0.13 (0.005)
M
c
0.10 (0.004)
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NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER
3. DIMENSION D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED AT
THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
4. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
5. THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT MINIMUM SPACE BETWEEN
PROTRUSIONS AND ADJACENT LEAD TO BE 0.46
(0.018).
DIM
A
A1
b
c
D
E
e
HE
L
LE
M
Q1
Z
MILLIMETERS
MIN
MAX
--2.05
0.05
0.20
0.35
0.50
0.18
0.27
5.10
5.50
5.10
5.45
1.27 BSC
7.40
8.20
0.50
0.85
1.10
1.50
0°
10°
0.70
0.90
--0.94
INCHES
MIN
MAX
--0.081
0.002
0.008
0.014
0.020
0.007
0.011
0.201
0.217
0.201
0.215
0.050 BSC
0.291
0.323
0.020
0.033
0.043
0.059
0°
10°
0.028
0.035
--0.037
MC34063A, MC33063A
Notes
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14
MC34063A, MC33063A
Notes
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MC34063A, MC33063A
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
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SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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