MODELS

VDC O

UTPUT

B2-81

Size (max.): 1.110 x 1.110 x 0.250 inches (28.19 x 28.19 x 6.35 mm)

Shown with "Gull Wing" lead option, also available with straight
leads. See Section B8, case D, for dimensions and options.

Weight:

15 grams maximum.

Screening: Standard, ES, or 883 (Class H). See Section B9 for

screening options, see Section A5 for ordering information.

SINGLE

12
15

DUAL

±5

±12
±15

DESCRIPTION

The MGA SeriesTM of DC/DC converters delivers 5 watts of output
power from a wide input voltage range of 16 to 40 VDC with up to
74% efficiency. Output models of 5, 12, 15, ±5, ±12 and ±15 VDC
meet a variety of system needs. All units withstand transients of up
to 50 V for up to 50 milliseconds and operate over the full military
temperature range of -55°C to +125°C.

ONVERTER

ESIGN

The MGA converters incorporate flyback topology with a typical
constant switching frequency of 500 kHz. Isolation between input
and output circuits is provided with a transformer in the forward path
and a temperature compensated optical link in the feedback control
loop. The feed-forward compensation design delivers an audio
rejection of 50 dB, typical, with input ripple as low as 50 mA p-p and
output ripple as low as 100 mV p-p. Output filter examples in Figures
3 and 4 provide suggested solutions for systems where very low
output ripple is required.

Tightly coupled magnetics minimize cross regulation in the MGA
dual output models. Either output can provide up to 80% of the total
available output power, providing the opposite output is carrying at
least 20% of the total output power.

The converter's short circuit current protection restricts the output
current to approximately 115% of the full load output current.

NHIBIT

UNCTION

The MGA converter's inhibit terminal disables internal switching,
resulting in no output and very low quiescent input current. Applying

a TTL low voltage (0.8 V or less) to the inhibit terminal (pin 1)
disables the output. Leaving the inhibit terminal unconnected or
connecting the inhibit terminal to an open collector gate enables the
output. The inhibit terminal has an open circuit voltage of 9 to 11 V.
In the inhibit mode the inhibit pin will source a maximum of 4 mA.
See "Inhibit Interface," Figure 2.

MIL-STD-461

Use Interpoint's FMGA-461 EMI filter to pass the CE03 require-
ments of MIL-STD-461C.

URFACE

OUNT

ACKAGE

The MGA DC/DC converters can be surface mounted with pick-and-
place equipment or manually. It is recommended that the case be
attached with flexible epoxy adhesive or silicone which is thermally
conductive (>1 watt /meter/°K).

Internal components are soldered with SN96 (melting temperature
221°C) to prevent damage during reflow. Maximum reflow tempera-
ture for surface mounting the MGA converter is 220°C for a
maximum of 30 seconds. SN60, 62, or 63 are the recommended
types of solder. Hand soldering should not exceed 300°C for 10
seconds per pin.

The hermetically sealed metal cases are available in two different
lead configurations. See Section B8, cases D1 and D2.

DC/DC C

ONVERTERS

28 V

OLT

NPUT

MGA SERIES

5 WATT

EATURES

· 55° to +125°C operation
· 16 to 40 VDC input
· Fully Isolated
· Optocoupler feedback
· Fixed frequency 550 kHz typical
· Topology Single Ended Flyback
· 50 V for up to 50 ms transient protection
· Inhibit function
· Indefinite short circuit protection
· Up to 74% efficiency

ABSOLUTE MAXIMUM RATINGS

TYPICAL CHARACTERISTICS

INHIBIT

RECOMMENDED OPERATING CONDITIONS

B2-82

MGA SERIES
5 WATT

DC/DC C

ONVERTERS

Output Voltage Temperature Coefficient

· 100 ppm/°C typ, 150 ppm/C max

Current Limit

· 115% of full load typical

Isolation

· Input to output
· Any pin to case except case pins
· 100 megohm minimum at 500 V

Conversion Frequency

· 500 kHz typical

450 kHz. min, 600 kHz max

Inhibit Pin Voltage (unit enabled)

· 9 to 11 V

Input Voltage Range

· 16 to 40 VDC continuous
· 50 V for up to 50 msec transient

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

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

Inhibit: TTL Open Collector

· Logic low (output disabled)

Logic low voltage

0.8 V

· Referenced to input common
· Logic high (output enabled)

Open collector

Input Voltage

· 16 to 40 V

Output Power

· 5 watts

Lead Soldering Temperature

· Reflow 220°C 30 sec. max

SN60, 62 or 63 recommended solder

· Hand solder 300°C 10 sec. max. per lead

Storage Temperature Range (Case)

· 65°C to +150°C

SINGLE OUTPUT MODELS

MGA2805S

MGA2812S

MGA2815S

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

OUTPUT VOLTAGE

OUT

4.95

5.0

5.05

11.88

12.12

14.85

15.15

VDC

OUTPUT CURRENT

= 16 to 40 VDC

1000

417

333

OUTPUT POWER

= 16 to 40 VDC

OUTPUT RIPPLE

10 kHz - 2 MHz

250

450

100

500

100

600

mV p-p

LINE REGULATION

= 16 to 40 VDC

LOAD REGULATION

NO LOAD TO FULL

INPUT VOLTAGE

CONTINUOUS

VDC

NO LOAD TO FULL

TRANSIENT 50 ms

INPUT CURRENT

NO LOAD

FULL LOAD

279

263

259

INHIBITED

INPUT RIPPLE

Tc = 25°C

200

mA p-p

10 kHz - 10 MHz

Tc = 55°C to +125°C

300

EFFICIENCY

LOAD FAULT

SHORT CIRCUIT

POWER DISS.

1.5

2.0

1.2

1.9

1.2

1.8

RECOVERY

STEP LOAD

50% 100% 50% LOAD

RESPONSE

TRANSIENT

500

200

500

750

300

750

1000

400

1000

mV pk

RECOVERY

200

500

400

1000

400

1000

µs

STEP LINE

16 40 16 VDC

RESPONSE

TRANSIENT

500

100

500

800

200

800

500

100

500

mV pk

RECOVERY

1.0

0.5

1.3

0.5

1.3

START-UP

OVERSHOOT

200

500

mV pk

DELAY

INHIBIT PIN

CURRENT

INHIBITED

2.5

4.0

2.5

4.0

2.5

4.0

CAPACITANCE

INPUT TO OUTPUT

CAPACITIVE LOAD

300

500

µF

Notes
1. Indefinite short circuit protection not guaranteed above 125°C (case).
2. Load transient transition time is >10 µs.

3. Recovery time is measured from application of the transient to the point at

which Vout is within regulation.

4. Input step transition time is >10µs.

B2-83

MGA SERIES

5 WATT

DC/DC C

ONVERTERS

DUAL OUTPUT MODELS

MGA2805D

MGA2812D

MGA2815D

PARAMETER

CONDITIONS

MIN

TYP MAX

MIN

TYP

MAX

UNITS

OUTPUT VOLTAGE

OUT

11.88

12.12

14.85

15.15

VDC

OUT

11.76 12 12.24

14.70 15 15.30

OUTPUT CURRENT

= 16 to 40 VDC

±208 333

±167

267

OUTPUT POWER

= 16 to 40 VDC

OUTPUT RIPPLE

10 kHz - 2 MHz

120

300

120

300

mV p-p

LINE REGULATION

OUT

= 16 to 40 VDC

OUT

180

LOAD REGULATION

OUT

(BALANCED)

NO LOAD TO FULL

OUT

(BALANCED)

200

CROSS REG.

EFFECT ON V

OUT

15=

INPUT VOLTAGE

CONTINUOUS

VDC

NO LOAD TO FULL

TRANSIENT 50 ms

INPUT CURRENT

NO LOAD

FULL LOAD

267

263

INHIBITED

INPUT RIPPLE

Tc = 25°C

200

mA p-p

10 kHz - 10 MHz

Tc = 55°C to +125°C

300

EFFICIENCY

LOAD FAULT

SHORT CIRCUIT

POWER DISS.

1.3

1.7

1.3

1.6

RECOVERY

STEP LOAD TRANSIENT

550

180

550

600

180

600

RESP O N S E

5, 6

RECOVERY

200

500

200

500

µs

STEP LINE

16 40 16 VDC

RESP O N S E

TRANSIENT

500

100

500

1500 200

1500

mV pk

RECOVERY

0.8

2.0

1.6

4.0

START-UP

OVERSHOOT

200

500

200

500

mV pk

DELAY

INHIBIT PIN

CURRENT

UNIT INHIBITED

2.5

4.0

2.5

4.0

CAPACITANCE

INPUT TO OUTPUT

CAPACITIVE LOAD

100

µF

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

Notes
1. Up to 4 watts, 80% of the total output power is available from either output

providing the opposite output is simultaneously carrying 20% of the total
output power. Each output must carry a minimum of 20% of the total output
power in order to maintain regulation on the negative output.

2. Applies to both +Vout and Vout
3. Cross regulation is specified for the following percentages of total output

power: +PO = 20% and PO = 80% to +PO =80% and PO = 20%

4. Indefinite short circuit protection not guaranteed above 125°C (case).
5. Load transient transition time is >10 µs.
6. Response of either output when the load for each output is simultaneously

transitioned from 25% to 50% to 25% of total output power (5 watts).

7. Recovery time is measured from application of the transient to the point at

which Vout is within regulation.

8. Input step transition time is >10µs.

VAILABLE

SOON

ASK YOUR

NTERPOINT REP

FOR INFORMA

TION

Case

MGA2815S

Input
Common

Positive
Input

Positive
Output

Output Common

To Load

Positive
Input

Input
Common

Positive

Output

Common

From input

power source

EMI Filter

Case

Negative
Output

Output
Common

Positive
Output

Input

Common

Case

Ground

Positive

Input

Inhibit

PWM

Control

Error
Amp

Isolated

Feedback

= Dual Output

MGA SERIES
5 WATT

DC/DC C

ONVERTERS

B2-84

IGURE

1: B

LOCK

IAGRAM

DIAGRAMS AND CONNECTIONS

IGURE

3: L

OISE

UTPUT

ILTER

MGA S

INGLE

UTPUT

ODEL

IGURE

4: L

OISE

UTPUT

ILTER

MGA D

UAL

UTPUT

ODEL

The filter suggestions in Figures 3 and 4 will further
reduce the output ripple for systems requiring very low
output noise.

C1 = 0.27 µF ceramic capacitor, 500V
C2 = C4 = 6.8 µF tantalum capacitor
C3 = C5 = 0.27 µF ceramic capacitor
Single output: T1 = 15T #28 AWG winding on toroid,

m = 5000

Dual output: T2 = 10T #28 AWG winding on toroid,

m = 5000

IGURE

2: I

NHIBIT

NTERFACE

200 pF

3.9 K

10 K

Inhibit

Input

Common

10 k

12 k

5 k

400

50 k

2N3904

10V

MGA

Vcc

Positive

Input

To Loads

Case

MGA2815D

Input
Common

Positive
Input

Positive

Output

Output Common

Positive
Input

Input
Common

Positive

Output

Common

From input

power source

EMI Filter

Case

Negative

Output

SMD NUMBERS

PIN OUT

TOP VIEW

MGA

1
2
3
4
5
6
7
8
9

18
17
16
15
14
13
12
11

Differently colored glass bead around pin one or dimple in
header (bottom of case) indicates pin one.
Cover marking is oriented with pin one at the upper right corner.

B2-85

MGA SERIES

5 WATT

DC/DC C

ONVERTERS

MODEL NUMBERING KEY

MGA 28 12 S Z / ES

Base Model

Input Voltage

Output Voltage

Screening

Number of Outputs

(S = single, D = dual)

Gull Wing Lead Option
(Straight leaded case has no designator
in this position.)

(Standard screening has no designator
in this position.)

Pin

Single Output

Dual Output

Inhibit

2, 3

Positive Input

No connection

5, 6

Input Common

7, 8

Case Ground

9, 10

No connection

11, 12 Positive Output

Positive Output

Output Common

15, 16 Output Common

Negative Output

17, 18 No connection

No connection

19, 20 Case Ground

Case Ground

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

IGURE

OUTPUT POWER (Watts)

MGA2815D

EFFICIENCY vs LINE & LOAD

EFFICIENCY (%)

40V

16V

28V

MGA2815D

ATTENUATION (dB)

AUDIO REJECTION

0.1

FREQUENCY (kHz)

OUTPUT POWER (Watts)

MGA2805S

EFFICIENCY vs LINE & LOAD

EFFICIENCY (%)

40V

16V

28V

IGURE

OUTPUT POWER (Watts)

MGA2812S

EFFICIENCY vs LINE & LOAD

EFFICIENCY (%)

40V

16V

28V

IGURE

ATTENUATION (dB)

AUDIO REJECTION

0.1

FREQUENCY (kHz)

MGA2805S

IGURE

OUTPUT POWER (Watts)

MGA2815S

EFFICIENCY vs LINE & LOAD

EFFICIENCY (%)

40V

16V

28V

IGURE

5: P

TANDARD

ICROCIRCUIT

RAWING

(SMD)

5962-9309201HXC
5962-9309301HXC
5962-9309401HXC
IN PROCESS
5962-9308901HXC
5962-9309001HXC

MGA S

ERIES

IMILAR

ART

MGA2805S/883
MGA2812S/883
MGA2815S/883
MGA2805D/883
MGA2812D/883
MGA2815D/883

Replace the "Y" with a "Z" in the SMD number to specify gull-wing leads.
For exact specifications for an SMD product, refer to the SMD drawing.
See Section A3, SMDs, for more information.

To meet specified performance, all pins must be
connected except "No Connection" pins.

See Section B8, case D for dimensions and gull-wing lead option.

B2-86

MGA SERIES
5 WATT

DC/DC C

ONVERTERS

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

IGURE

1ms/div

TURN-ON INTO NO LOAD, MGA2805S

1V/div.

20V/div.

out

200

s/div

out

LOAD TRANSIENT RESPONSE

(10% 90%), MGA2815D

200mV/div.

10% to 90%

90% to 10%

out

=0.5W

100

s/div

INPUT LINE TRANSIENT RESPONSE

(16V TO 40V), MGA2805S

20mV/div.

20V/div.

out

IGURE

100

s/div

LOAD TRANSIENT RESPONSE

(10% 100%), MGA2805S

50mV/div.

10% to 100%

100% to 10%

IGURE

200

s/div

INPUT LINE TRANSIENT RESPONSE

(16V TO 40V), MGA2815D

100mV/div.

20V/div.

out

IGURE

100

s/div

LOAD TRANSIENT RESPONSE

(50% 100%) MGA2805S

50mV/div.

50% to 100%

100% to 50%

IGURE

OUTPUT LOAD (%)

MGA2815D/MGA2812D

CROSS REGULATION

COND. A: 50% LOAD +V; 10% to 50% V

COND. B: 50% LOAD V; 10% to 50% +V

out

VOLTAGE CHANGE (%)

2815D

2812D

COND B

COND A

100

s/div

out

LOAD TRANSIENT RESPONSE

(10% 50%), MGA2815D

100mV/div.

10% to 50%

50% to 10%

out

=2.5W

IGURE

500

s/div

TURN-ON INTO NO LOAD, MGA2815D

5V/div.

20V/div.

out

IGURE

OUTPUT LOAD (+V

out

%/V

out

MGA2815D/MGA2812D

CROSS REGULATION

(9010% LOAD on +V, 10-90% LOAD on V)

out

VOLTAGE CHANGE (%)

90/10 70/30 50/50 30/70 10/90

2815D

2812D

22222-001-DTS Rev A

DQ# 1034

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 © 1998 - 1999 Interpoint. All rights reserved.

B8-9

CASE D

ASES

0.060 (1.52)

0.075 (1.91)

0.030 (0.76)

0.100 (2.54) 4X

0.100 (2.54) 18X

1.000 (25.40)

1.000

(25.40)

CASE D

TOP VIEW

See Figure 13

for pin

configurations.

Materials
Header

Kovar/Nickel/Gold

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

1.110 max

(28.19)

1.110 max

(28.19)

CAUTION
Maximum reflow temperature is 220

C for a

maximum of 30 seconds. SN60, SN62, or SN63
are the recommended types of solder. See below
for Solder Mask instructions.

Hand soldering should not exceed 300

C for 10

seconds per pin.

Cover marking is oriented with pin one
at the upper right corner.

Differently colored glass bead around pin one or dimple
in header (bottom or side of case) indicates pin one.

Straight Leads

(This view shows
straight leads.)

MGA Series: Screening Standard, ES, or 883

0.010

(0.25)

0.135 ref.

(3.43)

Leads are solder dipped and lead
dimensions are prior to solder dip.

0.08

(2.0)

0.010 (0.25)

Bottom of lead to

bottom of case

0.055
(1.40)

0.070
(1.78)

TOP VIEW CASE D

1.400 ref. (35.56)

0.010

(0.25)

0.08

(2.0)

0.250 max.

(6.35)

0.50

(12.7)

2.115 ref. (53.72)

0.015

(0.38)

Seam seal

0.900 (22.86)
0.800 (20.32)
0.700 (17.78)
0.600 (15.24)
0.500 (12.70)
0.400 (10.16)
0.300 ( 7.62)
0.200 ( 5.08)
0.100 ( 2.54)

1.000 (25.40)

1
2
3
4
5
6
7
8
9

18
17
16
15
14
13
12
11

Gull Wing Leads

Option

Differently colored glass bead around pin one or dimple in
header (bottom or side of case) indicates pin one.
Cover marking is oriented with pin one at the upper right corner.

0.000

Solder Mask Notes
1. Pad dimensions are for the solder mask opening. Lead common to

each other can be connected underneath as desired.

2. Ground pins should be connected to the center pad for improved

grounding.

3. Center pad should not have a solder mask. Solder, copper, or Au/Ni

plate are preferred over solder for adhesive attach.

4. Solder coat to solder down converter.
5. If less rotation of case is desired, make the pad width 0.020inches

(0.51 mm). Pad length can be extended 0.010 inches (0.25 mm)
towards the case body and as-desired dimension away from the case
body.

6. Do not exceed 220°C as measured on the body of the converter (top

or bottom).

7. Attach the body of the case to the board with a thermally conductive

adhesive or SN60, 62, or 63 solder. The adhesive can be electrically
conductive as well. It can be applied as an underfill post solder or
dispensed and cured prior or during solder.

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.

IGURE

13: C

ASE

IGURE

14: C

ASE

D S

OLDER

ASK

IGURE

12: C

ASE

AXIMUM

IMENSIONS

C2-10

TEST (125°C Products)

STANDARD

/ES

/883 (Class H)*

PRE-CAP INSPECTION

Method 2017, 2032

yes

TEMPERATURE CYCLE (10 times)

Method 1010, Cond. C, -65°C to 150°C

yes

Method 1010, Cond. B, -55°C to 125°C

yes

CONSTANT ACCELERATION

Method 2001, 3000 g

yes

Method 2001, 500 g

yes

BURN-IN

Method 1015, 160 hours at 125°C

yes

96 hours at 125°C case (typical)

yes

FINAL ELECTRICAL TEST MIL-PRF-38534, Group A

Subgroups 1 through 6: -55°C, +25°C, +125°C

yes

Subgroups 1 and 4: +25°C case

yes

HERMETICITY TESTING

Fine Leak, Method 1014, Cond. A

yes

Gross Leak, Method 1014, Cond. C

yes

Gross Leak, Dip (1 x 10

-3

)

yes

FINAL VISUAL INSPECTION

Method 2009

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

the full military temperature range of 55°C to +125°C.

MOR Series
MFLHP Series
MFL Series
MHP Series
MTR Series
MQO Series**

MHD Series
MHV Series
MHF+ Series
MHF Series**
MGA Series
MSA Series

MGH Series
MCH Series
FM-704A EMI Filter
FMD**/FME EMI Filter
FMC EMI Filter
FMH EMI Filter

FMGA EMI Filter
FMSA EMI Filter
HUM Modules**
LCM Modules**
LIM Modules

QA SCREENING
125°C PRODUCTS

125°C P

RODUCTS

Applies to the following products

**MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer
`883" screening.

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