F
EATURES
•
•
•
*
•
•
•
•
•
–55° to +100°C operation
16 to 40 VDC input
Two to eight outputs
Fully Isolated
50 V for up to 50 ms transient
protection
Inhibit function
Sync function available on
select modules
Sense available on select
single output modules
Short circuit protection
M
ULTIPLE
O
UTPUT
(2-8),
F
ACTORY
C
ONFIGURABLE
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
MDC SERIES
UP TO 60 WATTS
VDC O
UTPUT
Mix or match volt-
ages and power to
configure from two
to eight outputs.
Size (max):MDCG-H 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
MDCA-F 3.005 x 2.260 x 0.400 inches (76.33 x 57.40 x 10.16 mm)
Weight:
MDCG-H 100 grams maximum
MDCA-F 150 grams maximum
Screening: Standard or ES
Description
Interpoint’s MDC Series™ of DC/DC converters offers a unique
product by effectively combining two, three, or four individual
modular DC/DC converters to provide more than one hundred
combinations. The modules are established high-reliability military
aerospace DC/DC converters with input voltages of 16 to 40 VDC
and a typical transient rating of 50 V for 50 milliseconds. All modules
operate from no-load to full load and provide a constant current limit
at each output.
Features
All converters have an inhibit function. Remote sense and trim up to
0.6V is available on the 30 watt single modules. The 15 watt and 30
watt choices have synchronization - if two are used, the synchro-
nization functions are combined internally.
Table 1: Modules – Power and Vout
Power
30 Watt
Vout
3.3
5
12
15
18
±5
±12
±15
3.3
5
5.2
12
15
28
±5
±12
±15
Features
Inhibit &
Sync &
Sense/
Trim up
Inhibit &
Sync
Inhibit &
Sync
1.5 Watt
Power
5 Watt
Vout
5
5.2
12
15
±5
±12
±15
3.3
5
5.2
12
15
±5
±12
±15
Features
Inhibit
15 Watt
Inhibit
1
MDC SERIES
UP TO 60 WATTS
F
ACTORY
C
ONFIGURABLE
DC/DC C
ONVERTERS
Table 2: Configurations
Resulting
Output Power (W)
60
45
40
33
26
20
30
2
1
1
0
0
0
Module Power (Watts)
15
0
1
0
2
1
0
5
0
0
2
0
2
4
1.5
0
1
0
2
1
0
Case Size: 3.005 x 2.260 x 0.400 inches (76.33 x 57.40 x 10.16 mm
Configuration
Selection Letter
1
A
B
C
D
E
F
1. Case has eighteen pins which may limit the number of output voltages available.
Case Size: 3. 005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
Configuration
Selection Letter
2
G
H
Resulting
Output Power (W)
30
8
30
0
0
Module Power (Watts)
15
2
0
5
0
1
1.5
0
2
2. Case has twelve pins which may limit the number of output voltages available.
Selecting a configuration:
Begin with the base model letters - MDC. Add a
configuration letter from “Table 2: Configurations”
that matches the number of outputs and power
level you require. Using “Table 1: Modules” from
page 1, choose from the available voltages in the
power levels determined by the configuration letter.
Add the chosen voltages to the model and configu-
ration letters beginning with the highest wattage
down to the lowest.
As an example: To configure a four output, 45 watt,
converter begin with MDCB. Choose the output
voltages for the 30 watt, 15 watt, and 1.5 watt
modules in Table 2. For this example a 30 watt 5
volt dual output, a 15 watt 28 volt single output, and
a 1.5 watt 12 volt output were selected. The
resulting configuration is MDCB/05D/28S/12S.
Note: The specifications on the following pages are for the individual modules. The specifications/perform-
ance of the configured converter may vary from the specifications in the “Electrical Characteristics” tables.
Please contact the factory for details.
More Examples:
MDCD/15D/12S/5S/5S
33 watt total, five outputs:
15 watt dual 15 volt, 15 watt single 12 volt, 1.5 watt
single 5 volt, 1.5 watt single 5 volt
MDCB/3.3S/5D/12D
45 watt total, five outputs: 30 watt single 3.3 volt, 15
watt dual 5 volt, 1.5 watt dual 12 volt
2
F
ACTORY
C
ONFIGURABLE
DC/DC C
ONVERTERS
Inhibit 1
Vin
Inh
Vin
30 Watt
Return
In Com
Sync In
Sync 1
Sync 2
Inh
Vin
30 Watt
In Com
Inhibit 2
Sync In
Ret
–S
Return 1
–Sense 1
+S
+V
+Sense 1
+V1
Case
Ret
–S
Return 1
–Sense 1
+S
+V
+Sense 1
+V1
MDC SERIES
UP TO 60 WATTS
Block Diagrams: Examples of Configurations
Case Size: 3.005 x 2.260 x 0.400
Figure 1: MDCA – 60 watts, 2 outputs
Vin
Return
Inhibit 1
Vin
5 Watt
Rtn
Inh
+V
Ret
–V
+V1
Return 1
–V1
Vin
5 Watt
Rtn
Inhibit 2
Inh
+V
Ret
–V
+V2
Return 2
–V2
Vin
5 Watt
Rtn
Inhibit 3
Inh
+V
Ret
–V
+V3
Return 3
–V3
Vin
5 Watt
Rtn
Inhibit 4
Inh
+V
Ret
–V
+V4
Return 4
–V4s
Case Size: 3.005 x 2.260 x 0.400
Figure 2: MDCF – 20 watts, 8 outputs
3
MDC SERIES
UP TO 60 WATTS
F
ACTORY
C
ONFIGURABLE
DC/DC C
ONVERTERS
30 Watt Single Output Modules
SYNC AND INHIBIT
Sync (500 to 675 kHz)
• Duty cycle 40% min, 60% max
• Logic low 0.8 V max
• Logic high 4.5 V min, 5 V max
• Referenced to input common
• If not used, connect to input common
Inhibit TTL Open Collector
• Logic low (output disabled)
Voltage
≤0.8
V
Inhibit pin current 8.0 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 40 VDC
Output Power
• 25 to 30 watts depending on model
Lead Soldering Temperature (10 sec per pin)
• 300°C
Storage Temperature Range (Case)
• –65°C to +135°C
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical single and dual outputs
• 200 ppm/°C main, 300 ppm/°C aux
triple output
Input to Output Capacitance
• 50 pF typ. (100 pF typ triple outputs)
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 40 dB typ (50 dB typ triple output)l
Conversion Frequency
• Free run 550 min, 600 typ, 650 max kHz
• External sync 500 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• 9 to 11 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC continuous
• 50 V for 50 msec transient
Case Operating Temperature (Tc)
• –55°C to +100°C full power
• –55°C to +115°C absolute
Derating Output Power/Current
• Linearly from 100% at 100°C to 0% at 115°C
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODULES
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
1
OUTPUT POWER
1
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
2
LOAD REGULATION
INPUT VOLTAGE
1
NO LOAD TO FULL
INPUT CURRENT
1
CONDITION
V
IN
= 16 to 40 VDC
V
IN
= 16 to 40 VDC
10 kHz – 2 MHz
Tc = –55°C TO +125°C
Vin = 16 to 40 VDC
Tc = –55°C TO +125°C
NO LOAD TO FULL
Tc = –55°C TO +125°C
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
10 kHz – 10 MHz
Tc = –55°C TO +125°C
SHORT CIRCUIT
POWER DISSIPATION
RECOVERY
1, 4
50% – 100% – 50%
TRANSIENT
RECOVERY
4
16 – 40 – 16 VDC
TRANSIENT
5
RECOVERY
4
DELAY
OVERSHOOT
FULL LOAD
NO LOAD
MIN
3.27
0
0
—
—
—
—
—
—
16
—
—
—
—
—
74
—
—
—
—
—
—
—
—
—
3R3S
TYP
3.30
––
—
15
—
5
—
2
—
28
—
30
0.94
7
25
76
—
1.4
MAX
3.33
6.06
20
40
50
10
10
10
10
40
50
75
—
8
50
—
10
6
MIN
4.95
0
0
—
—
—
—
—
—
16
—
—
—
—
—
76
—
—
—
—
—
—
—
—
—
05S
TYP
5.00
—
—
35
50
10
15
5
15
28
—
35
1.15
3
20
78
—
1.4
12S
15S
18S
MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
5.05 11.88 12.00 12.12 14.85 15.00 15.15 17.82 18.00 18.18 VDC
5.0
0
—
2.5
0
—
2.0
0
—
1.67
A
25
50
90
30
50
30
50
40
50
75
—
8
50
—
10
5
0
—
—
—
—
—
—
16
—
—
—
—
—
80
—
—
—
—
—
—
—
—
—
—
25
40
10
15
5
15
28
—
35
1.30
3
20
83
—
1.4
30
50
90
30
50
30
50
40
50
75
—
8
50
—
10
5
0
—
—
—
—
—
—
16
—
—
—
—
—
81
—
—
—
—
—
—
—
—
—
—
25
40
10
15
5
15
28
—
35
1.25
3
20
84
—
1.4
30
50
90
30
50
30
50
40
50
75
—
8
50
—
10
5
0
—
—
—
—
—
—
16
—
—
—
—
—
81
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
28
—
—
1.33
—
—
—
—
1.4
—
60
±500
300
—
0
—
30
40
90
30
50
30
50
40
50
50
—
8
50
—
10
—
±600
—
—
—
5
—
—
W
mV p-p
mV
mV
VDC
V
mA
A
mA
mA p-p
%
W
ms
mV pk
µs
mV pk
µs
ms
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT
3
STEP LOAD RESP.
±125 ±250
—
200
—
—
1.4
0
33
±300
300
5
50
150
±200 ±300
60
200
±200 ±300
—
300
1.4
0
50
5
50
250
±250 ±400
60
200
±400 ±500
—
300
1.4
0
120
5
120
600
±350 ±500
60
200
±500 ±600
—
300
1.4
0
150
5
150
750
STEP LINE RESP.
START-UP
1
mV pk
Notes
1. Tc = –55°C to +100°C
2. Operation is limited below 16V.
3. Indefinite short circuit protection not guaranteed above 100°C case.
4. Recovery time is measured from application of the transient to point at which
Vout is within 1% of final value.
5. Transition time
≥10
µs.
4
F
ACTORY
C
ONFIGURABLE
DC/DC C
ONVERTERS
30 Watt Dual Output Modules
MDC SERIES
UP TO 60 WATTS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODULES
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
1, 2
OUTPUT POWER
1, 2
OUTPUT RIPPLE
VOLTAGE +/– V
OUT
LINE REGULATION
3
V
IN
= 16 TO 40 VDC
Tc = –55°C
TO +125°C
LOAD REGULATION
NO LOAD TO FULL
Tc = –55°C
TO +125°C
CROSS REGULATION
EFFECT ON –V
OUT
INPUT VOLTAGE
1
NO LOAD TO FULL
INPUT CURRENT
SEE NOTE 4
SEE NOTE 5
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
10 kHz - 10 MHz
POWER DISSIPATION
SHORT CIRCUIT
1
RECOVERY
50 – 100 – 50% BALANCED
TRANSIENT
RECOVERY
7
16 – 40 – 16 V
IN
TRANSIENT
8
RECOVERY
7
START–UP
1
DELAY
OVERSHOOT
FULL LOAD
NO LOAD
—
—
0
50
50
250
—
—
0
120
120
600
—
—
0
150
150
750
mV pk
CONDITIONS
+V
OUT
–V
OUT
V
IN
= 16 TO 40 VDC
V
IN
= 16 TO 40 VDC
10 kHz - 2 MHz
Tc = –55°C TO +125°C
+V
OUT
–V
OUT
+V
OUT
–V
OUT
+V
OUT
–V
OUT
+V
OUT
–V
OUT
MIN
4.95
4.92
0
0
—
—
—
—
—
—
—
—
—
—
—
—
16
0
—
—
—
—
76
—
—
—
—
—
—
—
05D
TYP
5.00
5.00
2.5
—
20
40
10
50
10
50
5
25
5
25
7
4
28
—
35
1.10
3
15
78
—
1.4
±200
100
±200
—
1.4
MAX
5.05
5.07
4.5
25
50
80
50
100
50
100
30
50
50
100
12
6
40
50
75
—
8
50
—
10
5.0
±300
200
±400
300
5
MIN
11.88
11.82
0
0
—
—
—
—
—
—
—
—
—
—
—
—
16
0
—
—
—
—
78
—
—
—
—
—
—
—
12D
TYP
12.00
12.00
1.25
—
30
40
10
50
10
50
15
30
15
30
4
4
28
—
50
1.34
3
20
81
—
1.4
±150
100
±200
—
1.4
MAX
12.12
12.18
2.25
30
80
120
30
120
50
150
30
120
50
180
8.3
6
40
50
75
—
8
50
—
10
5.0
±300
200
±400
300
5
MIN
14.85
15D
TYP
15.00
MAX
15.15
15.23
1.8
30
80
120
30
150
50
180
30
150
50
180
8
6
40
50
75
—
8
50
—
10
5.0
±400
200
±500
300
5
%
VDC
V
mA
A
mA
mA p-p
%
W
ms
mV pk
µs
mV pk
µs
ms
mV
mV
A
W
mV p-p
UNITS
VDC
14.77 15.00
0
0
—
—
—
—
—
—
—
—
—
—
—
—
16
0
—
—
—
—
80
—
—
—
—
—
—
—
1.0
—
25
40
10
50
10
50
15
30
15
30
3
4
28
—
50
1.29
3
20
83
—
1.4
±200
100
±400
—
1.4
INPUT RIPPLE
CURRENT
1
EFFICIENCY
LOAD FAULT
6
STEP LOAD
RESPONSE ± V
OUT
STEP LINE
RESPONSE ± V
OUT
Notes
1.Tc = –55°C to +100°C.
2. Up to 90% of the total output current/power is available from either output
providing the positive output is carrying at least 10% of the total output
power.
3. Operation
is
limited
below
16
V
(see
Figure
21).
+P
out
20% to 80%; –P
out
80% to 20%
5. Effect on the negative output under the following conditions:
+P
out
50%; –P
out
10% to 50%
6. Indefinite short circuit protection not guaranteed above 100°C case.
7. Recovery time is measured from application of the transient to point at which
Vout is within 1% of final value.
8. Transition time
≥
10 µs.
5
