Interpoint MCH2805S Dc/dc converters 28 volt input Datasheet

FEATURES
MCH SERIES
1.5 WATT
DC/DC CONVERTERS
28 VOLT INPUT
•
•
•
•
•
•
•
-55°C to +125°C operation
12 to 50 VDC input
Fully isolated
Magnetic feedback
Fixed frequency 370 kHz typ.
Topology – Current Mode Flyback
80 V for up to 120 ms transient protection
(70 V for 15 V single and dual models)
• Inhibit function
• Short circuit protection
• Undervoltage lockout
MODELS
VDC OUTPUT
SINGLES
5
5.2
12
15
DUALS
±5
±12
±15
Size (max.): 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm)
Weight:
12 grams max.
Screening: Standard, ES, or 883 (Class H)
DESCRIPTION
With a miniature footprint of just 0.8 square inches, the MCH
Series™ of DC/DC converters delivers 1.5 watts of output power
while saving significant board real estate. The wide input voltage
range of 12 to 50 VDC accepts the varying voltages of military, aerospace, or space bus power and tightly regulates output voltages to
protect downstream components. Transient protection of 80 volts for
up to 120 milliseconds exceeds the requirements of MIL-STD-704A
for the 5, 5.2, and 12 volt single models and the 12 volt dual model.
The 15 volt single and dual converters will withstand transients of up
to 70 volts for up to 120 milliseconds.
CONVERTER DESIGN
MCH Series DC/DC converters incorporate a continuous flyback
topology with a constant switching frequency of approximately 370
kHz. Current-mode pulse width modulation (PWM) provides output
voltage regulation. Output error voltage is magnetically fed back to
the input side of the PWM to regulate output voltage. Regulation is
also affected by the load; refer to the Electrical Characteristics
tables on the following pages.
Dual models regulate the negative output with magnetic coupling to
the positive output. Up to 80% of the total load may be on one output
providing that the other output carries a minimum of 20% of the total
load. The dual models can be used at double the output voltage by
connecting the load between positive and negative outputs, leaving
the common unconnected. (ex: MCH2805D can be used as a 10
VDC output.)
INHIBIT FUNCTION
When an open collector TTL logic low is applied to the inhibit
terminal, pin 7, the converter shuts down and lowers the output
voltage to near zero and input current to as low as 2.3 mA. Leaving
the terminal open or applying an open collector TTL logic high will
enable the converter.
PROTECTION FEATURES
Undervoltage lockout prevents the MCH Series converters from
operating below approximately 8 VDC input voltage to keep system
current levels smooth, especially during initialization or re-start operations. All models include a soft-start function to prevent large
current draw and minimize overshoot. The converters also provide
short circuit protection by restricting the current.
MIL-STD-461
Use Interpoint’s FMSA-461 EMI filter to pass the CE03 requirements
of MIL-STD-461C.
CONVENIENT PACKAGING
The MCH Series converters are packaged in hermetically sealed,
projection-welded metal cases which provide EMI/RFI shielding.
POSITIVE 1
INPUT
+
0.47 µF
typical
+VIN
FB
+
INHIBIT
7
SHUTDOWN
PWM
CONTROLLER
+VOUT
+
INPUT
COMMON
3 POSITIVE
OUTPUT
2
4 OUTPUT
COMMON
6 NEGATIVE
OUTPUT
DUAL MODELS ONLY
FIGURE 1: BLOCK DIAGRAM
1
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
TYPICAL CHARACTERISTICS
INHIBIT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 12 to 50 VDC
Output Power
• 1.5 W
Capacitive Load
• Single output models 200 µF
• Dual output models 100 µF
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
Inhibit – TTL Open Collector
• Logic low (output disabled) 0.8 V max
Inhibit pin current 1 mA max
• Referenced to input common
• Logic high (output enabled) open collector
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 12 to 50 VDC continuous
• 80 V for 120 msec transient
(70 V for 15 V single and dual models)
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derating Output Power/Current (Tc)
• Linearly from 100% at 125°C to 0% at 135°C
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 100 to 170 pF typical
Undervoltage Lockout
• 8 V input typical
Current Limit
• 125% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection 40 dB, typical
Conversion Frequency (kHz)
• 25°C, 300 min, 370 typ, 450 max
• –55°C to +125°C
270 min, 370 typ, 470 max
Inhibit Pin Voltage (unit enabled)
• 7 to 12 V
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
CONDITIONS
OUTPUT VOLTAGE1
Tc = 25°C
Tc = –55°C TO +125°C
OUTPUT CURRENT
VIN = 12 to 50 VDC
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
INPUT RIPPLE
CURRENT2
EFFICIENCY
3, 4
LOAD FAULT
STEP LOAD
RESPONSE5
STEP LINE
RESPONSE5
START-UP
0 TO 28 VDC
VIN = 12 TO 50 VDC
0
—
1.5
0
—
1.5
0
—
1.5
0
10 kHz - 2 MHz
Tc = –55°C TO +125°C
V = 12 TO 50 VDC
IN
Tc = –55°C TO +125°C
10% TO FULL LOAD
Tc = –55°C TO +125°C
50% TO FULL
Tc = –55°C TO +125°C
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
Tc = –55°C TO +125°C
FULL LOAD
Tc = –55°C TO +125°C
INHIBITED
Tc = –55°C TO +125°C
10k Hz - 10 MHz
Tc = –55°C TO +125°C
Tc = 25°C
Tc = –55°C TO +125°C
POWER DISSIPATION
Tc = –55°C TO +125°C
RECOVERY
Tc = -–55°C TO +125°C
50 %–100%– 50% LOAD
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc =–55°C TO +125°C
12 TO 50 TO 12 V
IN
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
DELAY
Tc = –55°C TO +125°C
OVERSHOOT
Tc = –55°C TO +125°C
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
45
65
35
40
350
380
100
115
28
—
5.5
6.0
70
73
2.3
2.4
100
130
77
75
1.3
1.4
3.0
3.5
150
300
100
120
700
800
200
300
50
80
10
11
74
78
3.2
3.5
200
250
—
—
2.0
2.3
12
15
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
45
65
35
40
350
380
100
115
28
—
5.5
6.0
70
73
2.3
2.4
100
130
77
75
1.3
1.4
3.0
3.5
150
300
100
120
700
800
200
300
50
80
10
11
74
78
3.2
3.5
200
250
—
—
2.0
2.3
12
15
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
50
70
60
70
600
640
145
160
28
—
6.0
6.5
68
70
2.3
2.4
100
150
79
77
2.0
2.2
3.5
3.5
200
300
200
250
1300
1400
300
400
50
80
10
12
72
74
3.2
3.5
200
250
—
—
3.2
3.5
15
20
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
–400
–500
—
—
185
185
125
125
400
500
500
600
–400
–500
—
—
185
185
125
125
400
500
500
600
–700
–800
—
—
350
380
130
130
700
800
500
600
–700
–800
—
—
–400
–500
—
—
—
—
—
—
170
180
0.75
0.75
7
10
0
0
400
500
3.0
4.0
20
40
100
150
–400 170
–500 180
—
0.75
—
0.75
—
7
—
10
—
0
—
0
See notes 1, 2, 3, 4, 5, and 6 on the following page.
2
MCH2805S
MCH285R2S
MCH2812S
MCH2815S
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
4.95
5
5.05 5.15 5.2 5.25 11.88 12 12.12 14.85 15 15.15
4.80
5
5.20 5.00 5.2 5.40 11.52 12 12.48 14.40 15 15.60
—
300
0
—
288
0
—
125
0
—
100 mA
400 –900 400
500 –1000 400
3.0
—
0.6
4.0
—
0.6
20
—
7
40
—
10
100
—
0
150
—
0
—
1.5
35 150
50 250
70 300
80 350
700 1500
760 1600
165 350
185 450
28
50
—
70
6.0
11
6.5
12
68
72
70
74
2.3 3.2
2.4 3.5
100 200
150 250
79
—
77
—
2.3 3.7
2.5 4.0
4.0
18
4.0
20
350
380
140
180
700
800
600
750
900 –750 400
1000 –850 450
2.5
—
0.47
3.0
—
0.5
20
—
7
40
—
10
250
—
0
350
—
0
750
850
2.0
2.5
20
40
300
450
UNITS
VDC
W
mV p-p
mV
mV
VDC
V
mA
mA p-p
%
W
ms
mV pk
µs
mV pk
ms
ms
mV pk
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
1
OUTPUT VOLTAGE
OUTPUT CURRENT6
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE +VOUT
–V
OUT
7
LINE REGULATION
8
LOAD REGULATION
±VOUT
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
INPUT RIPPLE
CURRENT
EFFICIENCY
2
CONDITIONS
Tc = 25°C
Tc = –55°C TO +125°C
VIN = 12 TO 50 VDC
MCH2805D
MIN TYP MAX
±4.95 ±5
±5.05
±4.80 ±5
±5.20
0
±150
240
MCH2812D
MCH2815D
MIN TYP MAX
MIN TYP MAX
±11.88 ±12 ±12.12 ±14.85 ±15 ±15.15
±11.52 ±12 ±12.48 ±14.40 ±15 ±15.60
0
±62.5 100
0
±50
80
VIN = 12 TO 50 VDC
0
—
1.5
0
—
1.5
0
—
1.5
10 kHz - 2 MHz
Tc = –55°C TO +125°C
—
—
35
50
150
250
—
—
35
40
150
250
—
—
30
35
150
250
10 kHz - 2 MHz
Tc = –55°C TO +125°C
VIN = 12 TO 50 VDC
Tc = –55°C TO +125°C
10% TO FULL
–55°C TO +125°C
—
—
—
—
—
—
35
50
10
20
300
350
150
250
50
100
600
700
—
—
—
—
—
—
35
40
100
110
550
570
150
250
300
400
1100
1200
—
—
—
—
—
—
30
35
165
180
600
630
150
250
500
650
1300
1400
50% TO FULL
–55°C TO +125°C
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
Tc = –55°C TO +125°C
FULL LOAD
Tc = –55°C TO +125°C
INHIBITED
Tc = –55°C TO +125°C
10 kHz - 10 MHz
Tc = –55°C TO +125°C
Tc = 25°C
Tc = –55°C TO +125°C
—
—
12
0
—
—
—
—
—
—
—
—
73
70
80
100
28
—
5.0
6.0
69
72
2.3
2.4
100
130
77
75
200
300
50
80
10
12
73
77
3.2
3.5
200
250
—
—
—
—
12
0
—
—
—
—
—
—
—
—
73
70
115
130
28
—
7.5
8.0
70
71
2.3
2.4
115
150
77
75
250
350
50
80
13
14
73
77
3.2
3.5
200
250
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
125
135
28
—
7.5
8.0
71
72
2.3
2.4
90
120
76
74
300
400
50
70
13
14
74
78
3.2
3.5
200
250
—
—
—
—
—
—
1.4
1.6
3.7
3.8
2.2
2.5
15
20
—
—
—
—
2.5
2.7
3.2
3.2
3.8
4.2
15
20
—
—
—
—
2.7
3.0
4.0
4.0
4.1
4.5
15
20
–300
–400
—
—
130
140
100
100
300
400
400
500
–600
–700
—
—
250
260
165
165
600
700
700
800
–600
–700
—
—
250
270
50
50
600
700
200
300
–250
–300
—
—
—
—
125
130
0.6
0.6
8
10
250
300
2.5
3.0
25
45
–500
–600
—
—
—
—
240
250
0.9
0.9
8
10
500
600
3.0
4.0
25
45
–500
–600
—
—
—
—
220
230
0.6
0.7
8
10
500
600
3.0
4.0
25
45
—
—
0
0
100
150
—
—
0
0
250
350
—
—
0
0
750
900
3,4
POWER DISSIPATION
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
STEP LOAD
50 %–100%– 50% LOAD
5
TRANSIENT
RESPONSE ± VOUT
Tc = –55°C TO +125°C
RECOVERY
–55°C TO +125°C
STEP LINE
12 TO 50 TO 12 VIN
RESPONSE5 ± VOUT
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
START–UP
DELAY
0 TO 28 VDC, ± VOUT Tc = –55°C TO +125°C
LOAD FAULT
OVERSHOOT
Tc = –55°C TO +125°C
Notes:
1. Specified at 50% load.
2. Lin = 2 µH.
3. Maximum duration of short circuit: 25°C-– 90 seconds, 125°C – 30 seconds.
4. Load fault is a short circuit (<50 mohms). Recovery is into resistive full load.
5. Transition ≥ 10 µs. Recovery = time to settle to within 1% of Vout final value.
UNITS
VDC
mA
W
mV p-p
mV
mV
VDC
V
mA
mA p-p
%
W
ms
mV pk
µs
mV pk
ms
ms
mV pk
6. Max. spec indicates 80% of the converter’s total power, available from either
output.
7. Specification applies to both + and – Vout.
8. Although no minimum load is required, at no load the output voltage may
increase up to 15%.
3
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
PIN OUT
Pin
1
2
3
4
5
6
7
Single Output
Positive Input
Input Common
Positive Output
Output Common
Case Ground
No connection
Inhibit
Dual Output
Positive Input
Input Common
Positive Output
Output Common
Case Ground
Negative Output
Inhibit
Squared corner and dot on
top of cover indicate pin one.
1 2
7
3
4
6
5
See page 7 for dimensions.
FIGURE 2: PIN OUT
MODEL NUMBERING KEY
MCH
28 12 D / 883
Base Model
Input Voltage
Output Voltage
(R = decimal point, 3R3 = 3.3 Vout)
Number of Outputs
(S = single, D = dual)
Screening
(Standard screening has no designator
in this position.)
4
SMD NUMBERS
STANDARD MICROCIRCUIT
DRAWING (SMD)
5962-9569601HXC
IN PROCESS
5962-9569701HXC
5962-9569801HXC
5962-9570201HXC
5962-9570301HXC
5962-9570401HXC
MCH SERIES
SIMILAR PART
MCH2805S/883
MCH285R2S/883
MCH2812S/883
MCH2815S/883
MCH2805D/883
MCH2812D/883
MCH2815D/883
For exact specifications for an SMD product, refer to the SMD
drawing. Call your Interpoint representative for status on the MCH
Series SMD releases which are “in process”. SMDs can be downloaded from
http://www.dscccols.com/programs/smcr
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
TYPICAL PERFORMANCE CURVES: Tc = 25°C, full load, Vin = 28 VDC, unless otherwise specified.
90
90
90
80
80
12 VOLT
70
50 VOLT
60
50
70
28 VOLT
50 VOLT
EFFICIENCY
28 VOLT
EFFICIENCY
70
EFFICIENCY
80
12 VOLT
12 VOLT
60
50
40
40
0.25 0.5
0
OUTPUT POWER
0.75
0.25 0.5
0
OUTPUT POWER
1
1.25 1.5 1.75
ALL 5 VOLT MODELS
50 VOLT
50
40
30
30
28 VOLT
60
30
1
1.25 1.5 1.75
0.75
12 & 15 VOLT SINGLE MODELS
0.25 0.5
0
OUTPUT POWER
EFFICIENCY vs LOAD
EFFICIENCY vs LOAD
FIGURE 4
FIGURE 3
1
1.25 1.5 1.75
0.75
12 & 15 VOLT DUAL MODELS
EFFICIENCY vs LOAD
FIGURE 5
VIN
50 VDC
FULL LOAD TO HALF LOAD
12 VDC
40
100 mV / div.
ATTENUATION (dB)
20
100 mV / div.
20 V / div.
0
60
80
100
1
VOUT
HALF LOAD TO FULL LOAD
200µs / div.
10
60
FREQUENCY (kHz)
MCH2815S - Representative of all models
500µs / div.
MCH2805S
MCH2805S
LOAD TRANSIENT RESPONSE
LINE TRANSIENT RESPONSE
AUDIO REJECTION
FIGURE 7
VOUT
6
0
2
4
8
10 12 14 16 18
TIME (ms)
MCH2805S
Representative of all 5 volt models
FIGURE 8
VIN
+VOUT FULL LOAD TO HALF LOAD
–VOUT HALF LOAD TO FULL LOAD
50 VDC
12 VDC
200 mV / div.
20 V / div.
VIN
200 mV / div.
2V/div.
20V/div.
FIGURE 6
+VOUT
–VOUT FULL LOAD TO HALF LOAD
+VOUT HALF LOAD TO FULL LOAD
–VOUT
200µs / div.
MCH2815D
500µs / div.
MCH2815D
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
FIGURE 10
FIGURE 11
TURN-ON INTO FULL LOAD
FIGURE 9
5
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
TYPICAL PERFORMANCE CURVES: Tc = 25°C, full load, Vin = 28 VDC, unless otherwise specified.
20V/div.
VIN
0 V for –VOUT
+VOUT
5V/div.
–VOUT
0 V for +VOUT
4
±5 V
2
–5 V
±VOUT VOLTAGE CHANGE (%)
±VOUT VOLTAGE CHANGE (%)
4
±12 V
±15 V
0
-2
10
20
40
50
30
OUTPUT LOAD (%)
DUAL ISOLATED
50% LOAD +V; 50% TO 10% LOAD –V
AND
50% LOAD –V; 50% TO 10% LOAD +V
TURN-ON INTO FULL LOAD
–15 V
–12 V
0
+15 V
+12 V
+5 V
-2
-4
90/10 70/30 50/50 30/70 10/90
OUTPUT LOAD (%)
DUAL ISOLATED
90% TO 10% LOAD ON +V
10% TO 90% LOAD ON –V
-4
0
5
10 15 20
25 30 35 40 45
TIME (ms)
MCH2815D
Also representative of MCH2812S & D and MCH2815S
2
CROSS REGULATION
CROSS REGULATION
FIGURE 12
FIGURE 14
FIGURE 13
1.8
90
120
1.2
1.0
80
12 V
SINGLE
& DUAL
5V
DUAL
5V
SINGLE
60
SAFE OPERATING AREA
40
20
0.8
9
10
INPUT VOLTAGE
11
12
ALL MODELS
LOW LINE DROPOUT
FIGURE 15
6
NARROWBAND
TRIP POINT 125%
100
EMISSION LEVEL (dB µA)
1.4
15 V
SINGLE
& DUAL
Vout NOMINAL %
MAXIMUM POWER (W)
1.6
0
0
20
40
60
80
100
% OF FULL LOAD
120 140
160
OUTPUT VOLTAGE vs. OUTPUT LOAD
FIGURE 16
70
CE
03
50
LI
M
IT
30
10
.015
0.1
1
FREQUENCY (MHz)
10
MCH FILTERED WITH FMSA
FIGURE 17
50
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
Dot on top of case
indicates pin one.
CASE A
BOTTOM VIEW
0.805 max
See Figure 19
(20.45)
for pin configurations.
0.980 max
(24.89)
Materials
Header
Kovar/Nickel/Gold
(Case A3, Kovar/Nickel)
Cover
Kovar/Nickel
Pins
Kovar/Nickel/Gold,
matched glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300°C for 10 seconds
per pin.
FIGURE 18: CASE A MAXIMUM DIMENSIONS
BOTTOM VIEW CASE A2
MCH Series: Screening – Standard, ES, or 883
Seam Seal
Projection Weld
Squared corner and dot on
top of case indicate pin one.
0.697
(17.70
1 2
3
4
6
5
0.835 (21.21)
0.000
7
0.135 (3.43)
0.235 (5.97)
0.27 ±0.02
(6.9 ±0.5)
0.000
0.27 ±0.02
(6.9 ±0.5)
0.270 max
(6.98)
0.000
0.270 max
(6.86)
0.097
(2.46)
0.000
0.435 (11.05)
0.535 (13.59)
0.018 ± 0.002 dia.
(0.46 ± 0.05)
FIGURE 19: CASE A
Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer
to the numerical dimensions for accuracy.
7
DC/DC CONVERTERS
MCH SERIES
1.5 WATT
ENVIRONMENTAL SCREENING
TEST
125°C
STANDARD
125°C
/ES
/883 (Class H)*
PRE-CAP INSPECTION
Method 2017, 2032
yes
yes
yes
TEMPERATURE CYCLE (10 times)
Method 1010, Cond. C, -65°C to 150°C
Method 1010, Cond. B, -55°C to 125°C
no
no
no
yes
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
Method 2001, 500 g
no
no
no
yes
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
96 hours at 125°C case (typical)
no
no
no
yes
yes
no
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C
Subgroups 1 and 4: +25°C case
no
yes
no
yes
yes
no
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
Gross Leak, Dip (1 x 10-3)
no
no
yes
yes
yes
no
yes
yes
no
FINAL VISUAL INSPECTION
Method 2009
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
*883 products are built with element evaluated components and are 100% tested and guaranteed over
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Email:
[email protected]
Interpoint UK
Phone: +44-1252-872266
Email:
[email protected]
8
22422-001-DTS Rev C This revision supercedes all previous releases.
All technical information is believed to be accurate, but no responsibility is
assumed for errors or omissions. Interpoint reserves the right to make changes in
products or specifications without notice. MGA Series is a trademark of Interpoint.
Copyright © 1997 - 2000 Interpoint. All rights reserved.
Interpoint France
Phone: +33-134285455
Email:
[email protected]
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