F
EATURES
•
•
•
•
•
•
•
•
•
•
•
–55° to +125°C operation
19 to 40 VDC input
Fully Isolated
Optocoupler feedback
Dual converter phase shifted
Fixed frequency, 500 kHz typical
Topology – Single Ended Forward
50 V for up to 50 ms transient protection
Inhibit and sync functions
Indefinite short circuit protection
Parallel up to 5 single output converters
for up to 900 watts
• Remote sense and trim on all models
• Up to 86% efficiency
• Configurable dual outputs
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
MK200 SERIES
200 WATT
MODELS
VDC O
UTPUT
SINGLE
5
12
15
DUAL
(+/+, –/–, or ±)
12
15
Size (max.): 2.405 x 2.285 x 0.465 inches (61.09 x 58.04 x 11.81 mm)
See Section B8, case M for dimensions.
Weight:
150 grams typical
Screening: Unscreened or Standard (ST). See Section C2 for
screening options, see Section A5 for ordering information.
DESCRIPTION
Interpoint’s MK200™ Series DC/DC converters deliver up to 200
watts of output power from an industry standard half-brick package.
The converters operate from -55°C to +125°C to satisfy the require-
ments of military, aerospace, and other high-rel applications. As
many as 5 single output converters may be paralleled for up to 900
watts of output power. The wide input voltage range of 19 to 40 VDC
provides full output power, while an extended input range of 16 to 40
VDC is available with derated output power operation from 16 to 19
VDC. Single and dual models deliver outputs of 5, 12, 15, ±12, or
±15 VDC.
R
EMOTE
S
ENSE AND
T
RIM
Remote sense terminals can be connected directly to your load to
compensate for line loss at high power (see Figure 3). All models
also have a trim function to adjust the output voltage. On dual
models, Vout2 is the adjustable output. The output voltage can be
adjusted down to as low as 60% or up to as high as 110%. Refer to
Figures 6 and 7 for connection diagrams and to Table 1 and 2 for
resistor values.
I
NHIBIT AND
S
YNCHRONIZATION
The inhibit and synchronization terminal (pin 4) can be used to
synchronize the MK200 Series converters to a system clock or
another converter. It can also be used to inhibit the converter. Pin 4
is referenced to input common and inhibited through an open
collector interface. When inhibited, the converter’s input current is
typically 15 mA while the inhibit terminal draws 1 mA or less. Multiple
units can be synchronized to enhance your system’s performance.
Refer to Figure 4 for connection diagram and notes.
C
ONVERTER
D
ESIGN
The MK200 Series of DC/DC converters combines dual-
phase/phase-shifted technology with a single-ended forward
conversion topology. This technology boosts power output without
increases in size and greatly reduces output noise while enhancing
the power density and efficiency of the converter. Packaged in one
module, two converters with parallel power paths operate at the
same frequency but are phase shifted from each other by 180°. The
result is a conversion frequency twice the switching frequency which
reduces switching noise and allows increased power density. The
dual converter design allows the dual models to be used in any
polarity:
• Two positive outputs
• Two negative outputs
• One negative and one positive output
The MK200 Series converters’ planar magnetics use printed
conductors instead of the traditional wire wound magnetics to elim-
inate errors that can occur in winding and provide 100% repro-
ducibility to ensure predictable operation of the converter. Film
capacitors on the input deliver another advantage with their low
ESR (Equivalent Series Resistance) and extremely low ESL
(Equivalent Series Inductance).
P
ROTECTION
F
EATURES
Protection features include soft start, undervoltage lockout and short
circuit protection. By controlling the start-up time, soft start mini-
mizes overshoot and large start-up current draw. Undervoltage
lockout, which typically occurs at 12 VDC, prevents possible
“hiccup” operation at low input voltages. Short circuit protection
limits short circuit current to a maximum of 190% of full load output
current.
P
ACKAGING
Six-sided metal construction provides EMI shielding and heat dissi-
pation in the industry standard half-brick package of 2.405 x 2.285
x 0.465 inches (61.09 x 58.04 x 11.81 mm). Internal silicon compo-
nents are hermetically sealed.
N
OISE
M
ANAGEMENT
Reduced switching noise and internal filtering combine to reduce
input ripple to as low as 65 mA peak to peak and output ripple to as
low as 25 mV peak to peak. Audio rejection is typically 35 dB.
B2-3
MK200 SERIES
200 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 40 VDC (19 to 40 full power)
Output Power
• 150 to 200 watts depending on model
(19 to 40 VDC input)
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +125°C
DC/DC C
ONVERTERS
SYNC AND INHIBIT
Sync In (450 to 550 kHz)
• Logic low 0.8 V max
• Logic high 8 VDC ±0.2 V, duty cycle 20%,
AC coupled through 2200 pF
* Referenced to input common
• If not used, leave unconnected
Sync Out - Referenced to input common
Inhibit TTL Open Collector
• Logic low (output disabled), V =
≤0.8
V
• Referenced to input common
• Logic high (output enabled) open collector
TYPICAL CHARACTERISTICS
Undervoltage Lockout
• 12 V input typical
Current Limit
• 190% of full load maximum
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 35 dB typical
Conversion Frequency
• Free run mode 1 MHz equivalent
(interleaved 500 kHz, 2 phase
balanced loads)
• External sync range 475 to 525 kHz
Parallel Operation
• 90% current sharing accuracy
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC (19 to 40 full power) continuous
• 50 V for 50 msec transient
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derating: Do not operate above 125°C case.
PINS NOT IN USE
Share
When not used, leave unconnected
Trim
When not used, leave unconnected
Sense
When not used, must be connected to
the respective output terminals
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
MK200-2805
PARAMETER
OUTPUT VOLTAGE
2
OUTPUT CURRENT
OUTPUT POWER
3
OUTPUT RIPPLE
VOLTAGE
4
V
IN
= 19 TO 40 VDC
V
IN
= 19 TO 40 VDC
V
IN
= 16 TO 19 VDC
10 kHz - 20 MHz
10 kHZ- 2 MHz
25°C
Tc –55°C to +125°C
LINE REGULATION
4
INPUT VOLTAGE
V
IN
= 19 TO 40 VDC
FULL POWER
REDUCED POWER
TRANSIENT 50 ms
INPUT CURRENT
NO LOAD
FULL LOAD
INHIBITED
INPUT RIPPLE
CURRENT
5
10 kHz - 20 MHz
10 kHz -2 MHz
25°C
Tc –55°C to +125°C
EFFICIENCY
LOAD FAULT
6
POWER DISS.
OVERLOAD
SHORT CIRCUIT
7
RECOVERY
OUTPUT CURRENT
TRIP POINT
SHORT CIRCUIT
7
STEP LOAD RESP.
4
50% – 100%
TRANSIENT
RECOVERY
8
START-UP
4
TRIM RANGE
9
DELAY
8
OVERSHOOT
—
—
—
0
35
450
750
65
0.40 0.60
—
—
—
0
40
1.00
750
750
65
2.00
—
—
—
—
40
850
750
90
1.50 2.25
9 TO 16.5
—
—
—
0
5
0.10
1200
750
10
0.50
—
—
—
0
5
0.10
1200 mV pk
750
10
0.50
µs
ms
V pk
VDC
—
—
—
—
39.0
46
—
—
—
—
18.5
27
—
—
—
—
18.5
24
—
—
—
—
9.5
±12
—
—
—
—
9.0
±12
A
—
—
—
—
—
—
45
45
30
—
—
—
—
—
—
45
40
30
—
—
—
—
—
—
45
40
30
—
—
—
—
—
—
32
32
30
—
—
—
—
—
—
32
32
30
W
ms
—
—
81
65
—
82
180
280
—
—
—
84
75
—
85
180
280
—
—
—
84
75
—
85
180
280
—
—
—
84
75
—
85
140
280
—
—
—
84
75
—
85
150
300
—
%
LOAD REGULATION
4
10% TO FULL LOAD
—
—
—
—
19
16
—
—
—
—
—
25
—
10
10
28
—
—
50
6.5
15
—
50
65
25
25
40
19
50
100
6.7
20
200
—
—
—
—
19
16
—
—
—
—
—
30
—
24
24
28
—
—
50
7.14
15
—
50
65
40
50
40
19
50
60
7.5
20
200
—
—
—
—
19
16
—
—
—
—
—
35
—
30
30
28
—
—
50
8.4
15
—
65
75
50
65
40
19
50
60
8.5
20
200
—
—
—
—
19
16
—
—
—
—
—
40
—
24
24
28
—
—
50
7.14
15
—
50
75
60
3
50
3
40
19
50
60
7.5
20
200
—
—
—
—
19
16
—
—
—
—
—
60
—
30
30
28
—
—
50
8.4
15
—
50
75
50
3
65
3
40
19
50
60
8.65
20
200
mA p-p
mV
mV
VDC
V
mA
A
mA
mV p-p
CONDITION
1
MK200-2812
TYP MAX
—
—
—
—
14.17
170
130
300
MK200-2815
MIN TYP MAX
0
0
0
—
—
—
—
—
13.3
200
140
400
MK200-281212
MIN
0
0
0
—
TYP
—
—
—
—
MAX
±7.08
170
130
300
MK200-281515
MIN
0
0
0
—
TYP
—
—
—
—
MAX UNITS
VDC
A
W
±6.67
200
140
400
MIN TYP MAX MIN
0
0
0
—
—
—
—
—
30
150
120
300
0
0
0
—
4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 ±11.88 ±12.00 ±12.12 ±14.85 ±15.00 ±15.15
3 TO 5.5
7.2 TO 13.2
Notes
See “Specification Table Notes,” 1 through 10, on the following page.
10 TO 13.2
10
10 TO 16.5
10
B2-4
DC/DC C
ONVERTERS
SPECIFICATION TABLE NOTES
Notes
1. In order to standardize source impedance, the following input filter was used for all tests:
C = 82 µF, L = 0.65 µH, “WIRE” is #18 gauge and 6 inches maximum length.
See Figure 1. Input measurements were taken at “a”.
2. On dual output models, outputs can be connected as +/+, –/–, or ±.
3. Tc = –55°C to +125°C.
4. On dual models the specification applies to each output.
5. On dual models, the specification applies to balanced loads.
6. Load fault conditions are measured with a resistive load.
7 Short circuit is measured with a 50 mΩ (±10%) load.
8. Time to settle to within 1% of Vout.
9. Refer to trim note 4 under “Notes for Connections” on the following page.
10. Vout2 only.
L
C
WIRE
a
MK200 SERIES
200 WATT
MK200
F
IGURE
1: I
NPUT
F
ILTER
FOR
T
ESTING
Positive
Input
5
7 Positive Sense
6 Positive
Output
100 WATTS
10 Negative
Output
FB
8 Trim
3 Share
Feedback
PWM
CM
CONTROLLER
Input
Common
1
FB
Feedback
PWM
CM
CONTROLLER
Inh/Sync in 4
9 Negative Sense
Sync out
2
100 WATTS
F
IGURE
2: B
LOCK
D
IAGRAM
B2-5
MK200 SERIES
200 WATT
+Vout 6
+Sense 7
Trim 8
–Sense 9
–Vout 10
DC/DC C
ONVERTERS
CONNECTIONS
M
ODEL
+10
R
load
% V
OUT
N
OMINAL
+5
–10
–20
–30
R
TRIM (
(R
T
) ohms, 1/4 watt
1125
2733
3192
3530
3057
675
7573
12600
5679
9377
225
2531
4178
N/A
2793
75
851
2300
N/A
598
–40
MK200-2805
MK200-2812
MK200-2815
MK200-281212
MK200
525
717
454
474
423
0
0
0
N/A
N/A
F
IGURE
3: S
INGLE
O
UTPUT
S
ENSE
C
ONNECTION1
Clock/
Sync Signal
2,200 pF
Positive
Input
Sync/Inhibit
MK200-281515
Input
Common
Inhibit Signal
Open
Collector
Inhibit
T
ABLE
1: Q
UICK
R
EFERENCE
T
RIM
F
IGURE
4: I
NHIBIT AND
S
YNC
C
ONNECTION2
5 +Vin
+Vout 6
TRIM UP
MK200–2805
R
T
=
TRIM DOWN
MK200–2812
4 Inh/SyncIn +Sense 7
3 Share
2 SyncOut
1 –Vin
Trim 8
–Sense 9
–Vout 10
R
T
=
MK200–2815
R
T
=
MK200–281212
R
T
=
R
T
=
5 +Vin
+Vout 6
R
load
MK200–281515
4 Inh/SyncIn +Sense 7
3 Share
2 SyncOut
1 –Vin
Trim 8
–Sense 9
–Vout 10
(
(
(
(
(
300
V
O
– 5
2420
V
O
– 12
3920
V
O
– 15.023
3025
V
O
– 12.073
3950
V
O
– 15
)
)
)
)
)
–75
R
T
=
–1300
R
T
=
–2200 R
T
=
R
T
=
R
T
=
–2210
–2210
(
(
(
(
(
150 (V
O
–2)
5 – V
O
1210 (V
O
–2)
12 – V
O
1960 (V
O
–2)
15.023 – V
O
1210 (V
O
–2.5)
12.073 – V
O
1580 (V
O
–2.5)
15 – V
O
)
)
)
)
)
–75
–1300
–2200
–2210
–2210
R
T
= trim resistor, V
O
= desired Vout
T
ABLE
2: C
ALCULATED
T
RIM
5 +Vin
+Vout 6
4 Inh/SyncIn +Sense 7
3 Share
2 SyncOut
1 –Vin
Trim 8
–Sense 9
–Vout 10
F
IGURE
5: S
INGLE
O
UTPUT
P
ARALLEL
C
ONNECTION3
Notes for Connections
1. Sense: All connections should be made as close to the load as possible
for optimum load regulation. When sense is not used, the sense terminals
must be connected to their respective output terminals (pin 7 to pin 6 and
pin 9 to pin 10).
2. Inhibit and Synchronization: Inhibit/sync in (pin4) and sync out (pin 2) are
referenced to input common (pin 1). Referencing either of these pins to
any other point could result in damage to the converter. To synchronize
the converter, AC couple an 8V peak pulse, 20% duty cycle, sync signal
through a 2200 pF capacitor. The converters sync on the positive edge of
the pulse.
3. Paralleling: Up to five single output converters may be paralleled. Sense
connections should be made as close as possible to the load for optimum
load regulation.
4. Trim: All connections should be made as close to the load as possible for
optimum load regulation. When increasing the output voltage, do not
exceed the maximum output power rating. When decreasing the output
voltage, do not exceed the maximum output current rating. On dual output
models, only Vout2 can be trimmed. Minimum Vout2 is 10 VDC. When
trim pin is not used, leave unconnected.
+Vout 6
+Sense 7
R
trim
Trim 8
–Sense 9
–Vout 10
Trim to Increase Voltage
R
load
+Vout 6
+Sense 7
R
trim
Trim 8
–Sense 9
–Vout 10
Trim to Decrease Voltage
R
load
F
IGURE
6: S
INGLE
O
UTPUT
T
RIM
C
ONNECTION4
+Vout1 6
–Vout1 7
Vout2Trim 8
+Vout2 9
–Vout2 10
R
trim
R
Load
+Vout1 6
–Vout1 7
Vout2Trim 8
+Vout2 9
–Vout2 10
R
trim
R
Load
Trim to Increase Voltage
Trim to Decrease Voltage
F
IGURE
7: D
UAL
O
UTPUT
T
RIM
C
ONNECTION4
B2-6
DC/DC C
ONVERTERS
PIN OUT
Pin
1
2
3
4
5
6
7
8
9
10
Single Output
Input Common
Sync Out
Share
Inhibit/Sync In
Positive Input
Positive Output
Positive Sense
Trim
Sense Return
Negative Output
Dual Output
Input Common
Sync Out
No connection
Inhibit/Sync In
Positive Input
Positive Vout 1
Negative Vout 1
Vout 2 Trim
Positive Vout 2
Negative Vout 2
MK200 SERIES
200 WATT
1
10
2
9
3
4
7
See Section B8, case M for dimensions.
6
TOP VIEW
(PIN SIDE)
MK200
8
5
MODEL NUMBERING KEY
MK200 – 28 12 / ST
Base Model
Input Voltage
Output Voltage
(For dual outputs both outputs are included
– MK200-281212 is a 12 volt dual output.)
Screening
(Standard screening has no designator
in this position.)
F
IGURE
8: P
IN
O
UT
, P
IN
S
IDE
V
IEW
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
87.5
85
82.5
80
77.5
75
0 20 40 60 80 100 120 140 160 180 200
OUTPUT POWER (Watts)
MK200-2805
16V
19V
28V
40V
EFFICIENCY (%)
90
87.5
16V
EFFICIENCY (%)
85
82.5
80
77.5
75
0 20 40 60 80 100 120 140 160 180 200
OUTPUT POWER (Watts)
MK200-2812
28V
40V
19V
EFFICIENCY (%)
85
82.5
40V
80
77.5
75
0 20 40 60 80 100 120 140 160 180 200
OUTPUT POWER (Watts)
MK200-2815
16V
90
19V
87.5
28V
EFFICIENCY vs. LINE & LOAD
EFFICIENCY vs. LINE & LOAD
EFFICIENCY vs. LINE & LOAD
F
IGURE
9
90
16V
87.5
85
82.5
80
77.5
75
0 20 40 60 80 100 120 140 160 180 200
OUTPUT POWER (Watts)
MK200-281212
19V
28V
EFFICIENCY (%)
40V
87.5
85
82.5
80
77.5
75
28V
16V
90
F
IGURE
10
–20
19V
–30
F
IGURE
11
EFFICIENCY (%)
ATTENUATION (dB)
–40
40V
–50
–60
EFFICIENCY vs. LINE & LOAD
0 20 40 60 80 100 120 140 160 180 200
OUTPUT POWER (Watts)
MK200-281515
–70
1
10
100
0.1
FREQUENCY (kHz) MK200 SINGLE MODELS
EFFICIENCY vs. LINE & LOAD
AUDIO REJECTION
F
IGURE
12
F
IGURE
13
F
IGURE
14
B2-7
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