MODELS

VDC O

UTPUT

B2-3

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.

SINGLE

12
15

DUAL

(+/+, /, or ±)

12
15

DESCRIPTION

Interpoint's MK200TM 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.

ONVERTER

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).

OISE

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.

EMOTE

ENSE AND

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.

NHIBIT AND

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.

ROTECTION

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.

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.

DC/DC C

ONVERTERS

28 V

OLT

NPUT

MK200 SERIES

200 WATT

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

RECOMMENDED OPERATING CONDITIONS

TYPICAL CHARACTERISTICS

SYNC AND INHIBIT

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

B2-4

MK200 SERIES
200 WATT

DC/DC C

ONVERTERS

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

Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.

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

MK200-2805

MK200-2812

MK200-2815

MK200-281212

MK200-281515

PARAMETER

CONDITION

MIN TYP MAX

MIN

TYP

MAX

MIN TYP MAX

MIN

TYP

MAX

MIN

TYP

MAX UNITS

OUTPUT VOLTAGE

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

VDC

OUTPUT CURRENT

= 19 TO 40 VDC

14.17

13.3

±7.08

±6.67

OUTPUT POWER

= 19 TO 40 VDC

150

170

200

170

200

= 16 TO 19 VDC

120

130

140

130

140

OUTPUT RIPPLE

10 kHz - 20 MHz

300

400

300

400

VOLTAGE

10 kHZ- 2 MHz

25°C

mV p-p

Tc 55°C to +125°C

LINE REGULATION

= 19 TO 40 VDC

LOAD REGULATION

10% TO FULL LOAD

INPUT VOLTAGE

FULL POWER

REDUCED POWER

VDC

TRANSIENT 50 ms

INPUT CURRENT

NO LOAD

100

FULL LOAD

6.5

6.7

7.14

7.5

8.4

8.5

7.14

7.5

8.4

8.65

INHIBITED

INPUT RIPPLE

10 kHz - 20 MHz

200

CURRENT

10 kHz -2 MHz

25°C

180

140

150

mA p-p

Tc 55°C to +125°C

280

300

EFFICIENCY

LOAD FAULT

POWER DISS.

OVERLOAD

SHORT CIRCUIT

RECOVERY

OUTPUT CURRENT

TRIP POINT

39.0

18.5

9.5

9.0

SHORT CIRCUIT

±12

STEP LOAD RESP.

50% 100%

TRANSIENT

450

750

850

1200

mV pk

RECOVERY

750

µs

START-UP

DELAY

OVERSHOOT

0.40 0.60

1.00

2.00

1.50 2.25

0.10

0.50

0.10

0.50

V pk

TRIM RANGE

3 TO 5.5

7.2 TO 13.2

9 TO 16.5

10 TO 13.2

10 TO 16.5

VDC

Notes
See "Specification Table Notes," 1 through 10, on the following page.

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

B2-5

MK200 SERIES

200 WATT

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 m

(±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.

MK200

WIRE

IGURE

1: I

NPUT

ILTER

FOR

ESTING

PWM
CM
CONTROLLER

Positive
Input

Input
Common

Inh/Sync in

Sync out

Feedback

Positive
Output

Negative
Output

100 WATTS

Positive Sense

Trim

Negative Sense

IGURE

2: B

LOCK

IAGRAM

B2-6

MK200 SERIES
200 WATT

DC/DC C

ONVERTERS

CONNECTIONS

= trim resistor, V

= desired Vout

ODEL

% V

OUT

OMINAL

+10

10

20

30

40

MK200-2805

525

1125

675

225

MK200-2812

717

2733

7573

2531

851

MK200-2815

454

3192

12600

4178

2300

MK200-281212

474

3530

5679

N/A

MK200-281515 423

3057

9377

2793

598

N/A

TRIM UP

300

= 2420

1300

3920

2200

15.023

3025

2210

12.073

3950

2210

TRIM DOWN

150 (V

5 V

1210 (V

1300

12 V

1960 (V

2200

15.023 V

1210 (V

2.5)

2210

12.073 V

= 1580

2.5)

2210

15 V

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

MK2002805

MK2002812

MK2002815

MK200281212

MK200281515

load

+Vout 6

+Sense 7

Trim 8

Sense 9

Vout 10

Trim to Increase Voltage

trim

+Vout 6

+Sense 7

Trim 8

Sense 9

Vout 10

load

Trim to Decrease Voltage

trim

Load

+Vout1 6

Vout1 7

Vout2Trim 8

+Vout2 9

Vout2 10

Trim to Decrease Voltage

trim

Load

Trim to Increase Voltage

trim

+Vout1 6

Vout1 7

Vout2Trim 8

+Vout2 9

Vout2 10

IGURE

6: S

INGLE

UTPUT

RIM

ONNECTION4

IGURE

7: D

UAL

UTPUT

RIM

ONNECTION4

+Vout 6

+Sense 7

Trim 8

Sense 9

Vout 10

load

2,200 pF

Positive
Input

Input
Common

Sync/Inhibit

MK200

Open
Collector
Inhibit

Clock/
Sync Signal

Inhibit Signal

+Vout 6

+Sense 7

Trim 8

Sense 9

Vout 10

5 +Vin

4 Inh/SyncIn

3 Share

2 SyncOut

1 Vin

load

+Vout 6

+Sense 7

Trim 8

Sense 9

Vout 10

5 +Vin

4 Inh/SyncIn

3 Share

2 SyncOut

1 Vin

+Vout 6

+Sense 7

Trim 8

Sense 9

Vout 10

5 +Vin

4 Inh/SyncIn

3 Share

2 SyncOut

1 Vin

IGURE

5: S

INGLE

UTPUT

ARALLEL

ONNECTION3

IGURE

4: I

NHIBIT AND

YNC

ONNECTION2

IGURE

3: S

INGLE

UTPUT

ENSE

ONNECTION1

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.

TRIM (

) ohms, 1/4 watt

ABLE

1: Q

UICK

EFERENCE

RIM

ABLE

2: C

ALCULATED

RIM

MODEL NUMBERING KEY

PIN OUT

B2-7

MK200 SERIES

200 WATT

DC/DC C

ONVERTERS

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.)

TOP VIEW

(PIN SIDE)

MK200

Pin

Single Output

Dual Output

Input Common

Sync Out

No connection

Inhibit/Sync In

Positive Input

Positive Output

Positive Vout 1

Positive Sense

Negative Vout 1

Trim

Vout 2 Trim

Sense Return

Positive Vout 2

Negative Output

Negative Vout 2

IGURE

8: P

, P

IDE

IEW

Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.

IGURE

16V

EFFICIENCY vs. LINE & LOAD

100 120 140 160 180 200

OUTPUT POWER (Watts)

MK200-281212

EFFICIENCY (%)

82.5

87.5

77.5

19V

28V

40V

AUDIO REJECTION

ATTENUATION (dB)

FREQUENCY (kHz)

0.1

100

MK200 SINGLE MODELS

16V

EFFICIENCY vs. LINE & LOAD

80 100 120 140 160 180 200

OUTPUT POWER (Watts)

MK200-2805

EFFICIENCY (%)

82.5

87.5

77.5

19V

28V

40V

IGURE

16V

EFFICIENCY vs. LINE & LOAD

100 120 140 160 180 200

OUTPUT POWER (Watts)

MK200-2812

EFFICIENCY (%)

82.5

87.5

77.5

19V

28V

40V

IGURE

16V

EFFICIENCY vs. LINE & LOAD

100 120 140 160 180 200

OUTPUT POWER (Watts)

MK200-281515

EFFICIENCY (%)

82.5

87.5

77.5

19V

28V

40V

IGURE

16V

EFFICIENCY vs. LINE & LOAD

100 120 140 160 180 200

OUTPUT POWER (Watts)

MK200-2815

EFFICIENCY (%)

82.5

87.5

77.5

19V

28V

40V

See Section B8, case M for dimensions.

B2-8

MK200 SERIES
200 WATT

DC/DC C

ONVERTERS

Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.

IGURE

1V/div.

20V/div.

OUT

= 150W

TURN-ON INTO FULL LOAD

TIME (ms)

MK200-2805

LOAD TRANSIENT RESPONSE

100% TO 10%, 10% TO 100% LOAD

500 mV / div.

1 ms / div.

MK200-2815

100% to 10%

10% to 100%

ATTENUATION (dB)

FREQUENCY (kHz)

0.1

100

MK200 DUAL MODELS

AUDIO REJECTION

IGURE

LINE TRANSIENT RESPONSE

50 mV / div.

s / div.

10 V / div.

out

MK200-2805

IGURE

LINE TRANSIENT RESPONSE

100 mV / div.

s / div.

10 V / div.

out

MK200-2815

IGURE

1V/div.

20V/div.

OUT

= 150W

TURN-ON INTO FULL LOAD

TIME (ms)

MK200-2805

IGURE

LINE TRANSIENT RESPONSE

100 mV / div.

100

s / div.

10 V / div.

OUT

MK200-281515

OUT

15.5

14.5

13.5

100

120

110

130

140

MK200-281212

MK200-281515

INPUT VOLTAGE

OUTPUT POWER

MK200 DUAL MODELS

LOW LINE DROPOUT vs. LOAD

2V/div.

20V/div.

OUT

= 200W

TURN-ON INTO FULL LOAD

TIME (ms)

MK200-2815

IGURE

LOAD TRANSIENT RESPONSE

100% TO 10%, 10% TO 100% LOAD

500 mV / div.

1 ms / div.

MK200-281212

100% to 10%

10% to 100%

OUT

1 / V

OUT

1 / V

OUT

IGURE

INPUT VOLTAGE

OUTPUT POWER

MK200 SINGLE MODELS

LOW LINE DROPOUT vs. LOAD

15.5

14.5

13.5

100

120

110

130

140

MK200-2805

MK200-2812

MK200-2815

IGURE

2V/div.

20V/div.

OUT

= 170W

TURN-ON INTO FULL LOAD

TIME (ms)

MK200-281212

OUT

12001-001-DTS Rev A

DQ# 1001

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. MK200 is a trademark of Interpoint.
Copyright © 1995-1999 Interpoint. All rights reserved.

B8-33

CASE M

ASES

Materials
Header Cold Rolled Steel/Polymide Insulator/

Copper/Nickel/Gold

Cover

Cold Rolled Steel/Nickel/Black Epoxy Powder

Pins Copper/Nickel/Gold

Solder attached

Cover is epoxy attached and filled.

Case dimensions in inches (mm)
Tolerance

0.005 (0.13) for three decimal places

0.01 (0.2) 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. Due to the high conductivity of the pins,
a high power soldering iron is recommended to
meet time and temperature requirements.
Overheating may cause the solder attach to
reflow and loosen the pins.

Epoxy Attach

Uncoated metal header.
Use this side for heat sinking.

0.40 (10.2)

0.30 (7.6)

2.285 max (58.04)

2.405 max

(61.09)

1.90 (48.3)

2.00

(50.8)

0.20 min (5.1)

0.465 max

1.81)

Pin diameter: 0.04 (1.0) pins 1- 5 and 7 - 9

0.08 (2.0) pins 6 and 10

CASE M

TOP VIEW

(PIN SIDE)

Mounting Hole

MK200 Series: Screening Standard or ST

PIN-SIDE VIEW CASE M

IGURE

51: C

ASE

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