MGDS-75-H-FT datasheet, PDF - EEWORLD Datasheet

Hi-Rel DC/DC CONVERTER

MGDM-75 : 75W POWER

Hi-Rel

Grade

5:1 Ultra Wide Input

Single Output

Metallic case - 1.500 VDC Isolation

• Ultra wide input range 16-80 Vdc, 9-45 Vdc

• 28Vdc input compliant with MIL-STD-704A/D/F

• Industry standard quarter brick package

• Power up to 75 W

• Wide temperature range : -40°C/+ 105° baseplate

• High efficiency (typ. 86%-90%)

• Soft start

• Galvanic isolation 1.500 VDC

• Integrated LC EMI filter

• Synchronizable

• Fully protected by independant security

• Under & overvoltage lock-out

• Overvoltage protection

• Current limitation protection

• Overtemperature protection

• No optocoupler for high reliability

1-General

The MGDM-75 series is a complete line of high

density wide input range DC/DC power modules

designed for aerospace, military and high-end

industrial applications. These modules use a

patented fixed switching topology at 420 KHz

providing ultra wide input range, low noise

characteristics and high power density. Standard

models are available with ultra wide input vol-

tage range of 9-45, 16-80 volts. The series

include single output voltage choices of 3.3, 5,

12, 15, 24, 28 volts.

The MGDM-75 series include synchronization, trim

and sense functions.

The synchronization function allows to synchronize

more than one converter to one frequency or an

external source frequency.

All the modules are designed with LC network

filters to minimize reflected input current ripple

and output voltage ripple.

The modules have totally independant security

functions including input undervoltage lock-out,

output overvoltage protection, output current

limitation protection, and temperature protec-

tion. Additionnally a soft-start function allows

current limitation and eliminates inrush current

during start-up.

The design has been carried out with surface

mount components, planar transformer and is

manufactured in a fully automated process to

guarantee high quality. The modules are potted

with a bi-component thermal conductive

compound and used an insulated metallic subs-

trat to ensure optimum power dissipation under

harsh environmental conditions.

4

2-Product Selection

Single output model

: MGDS-75-

(/T) and/or (/S)

(/T) : option for -55°C start up operating temperature

(/S) : option for screening and serialization

Input Voltage Range

Permanent

H : 9-45 VDC

O : 16-80 VDC

B

C

E

F

I

J

Output

:

3.3 VDC

5 VDC

12 VDC

15 VDC

24 VDC

28 VDC

REDEFINING THE SOURCE OF POWER

©

Gaia Converter FC03-032.03/06 Revision G

For locations, phone, fax, E-Mail see back cover

MGDM-75 Series

2- Product Selection (continued)

Hi-Rel

Grade

Input range

Output

Current

Reference

Options

9-45

16-80

VDC

3.3 VDC

5 VDC

12 VDC

15 VDC

24 VDC

28 VDC

3.3 VDC

5 VDC

12 VDC

15 VDC

24 VDC

28 VDC

15 A

12,5 A

6,25 A

5A

3,125 A

2,7 A

15 A

6,25 A

5A

3,125 A

2,7 A

MGDS-75-H-B

MGDS-75-H-C

MGDS-75-H-E

MGDS-75-H-F

MGDS-75-H-I

MGDS-75-H-J

MGDS-75-O-B

MGDS-75-O-C

MGDS-75-O-E

MGDS-75-O-F

MGDS-75-O-I

MGDS-75-O-J

/T

,

/S

4

Converter Selection Chart

M G D S - 75 - O - E / T

Number of Outputs :

S : single output

Input voltage range :

H : 9-45 VDC

O : 16-80 VDC

Output voltage :

See table page 1

Option :

(/T) : -55°C start up

(/S) : screening and

serialization (consult

application note

«screening grades»)

©

Gaia Converter FC03-032.03/06 Revision G

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For locations, phone, fax, E-Mail see back cover

MGDM-75 Series

3- Block Diagram

The MGDM-75 DC/DC converter is based on a

cons-

tant

420KHz pulse-width modulated forward topology

designed for

ultra large input range.

The output voltage is monitored on the secondary

side avoiding the use of optocoupler to optimize

long-term reliability

and provide good immunity

against radiations.

An auxilliary supply is implemented to feed

independently all security functions such as the input

undervoltage lock-out (UVLO), the output overload

protection (OCP), the ouput overvoltage protection

(OVP) and the thermal protection (OTP).

Hi-Rel

Grade

As this auxilliary power is independent from the main

power supply, the module features a

wide trim

windows from 90% to 110%

of the nominal output

voltage.

The main power transformer designed for more than

75W power is a multi-layer planar transformer which

allows 100% reproductibility for optimized module

efficiencies.

The controlled feedback regulation is located at the

secondary side allowing a high regulation bandwidth

and a very fast response to load changes.

Vin

LC input

filter

POWER STAGE

LC output

filter

Vo

4

UVLO

Current

Sense

Mosfet

Driver

OVP

On/Off

Auxilliary

supply

Control circuit

Feed-back

function

Sense

Trim

Sync

Thermal

Shutdown

Isolation Barrier

©

Gaia Converter FC03-032.03/06 Revision G

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For locations, phone, fax, E-Mail see back cover

MGDM-75 Series

4- Electrical Specifications

Data are valid at +25°C, unless otherwise specified.

Parameter

Input

Nominal input voltage

Permanent input

voltage range (Ui)

Undervoltage lock-out

(UVLO)

Start up time

Reflected ripple current

Input current in short circuit

mode (Average)

No load input current

Input current in inhibit mode

Output

Nominal

Maximum

Typical

Maximum

Minimum

Maximum

Typical

VDC

%

W

A

mVpp

%

3,3

5

12

15

24

28

+/- 2

50 to 75

15

12,5

6,25

5

3,125

2,7

50

100

150

250

+/- 1

90 **

110

Conditions

Limit or

typical

Nominal

Min. - Max.

Nominal

Maximum

Typical

Maximum

Units

Hi-Rel

Grade

Single Output MGDS-75

75 - H

24

9 - 45

8,5

7,5

30

500

1

30

10

75 - O

28

16 - 80

15,5

14,5

30

500

0,2

30

10

Full temperature range

Turn-on voltage

Turn-off voltage

Ui nominal

Nominal output

Full load : resistive

Ui nominal, full load

BW = 20MHz

Ui nominal

Short-circuit

Ui nominal

No load

Ui nominal

Inhibit

VDC

ms

mApp

A

mA

Output voltage *

Ui min. to max.

3,3

5

12

15

24

28

+/- 2

50 to 75

15

6,25

5

3,125

2,7

50

100

150

250

+/- 1

90 **

110

4

Set Point accuracy *

Output power

Output current

3,3V output

5V output

12V output

15V output

24V output

28V output

Ripple output voltage

3,3V and 5V output

12V output

15V output

24V and 28V output

Output regulation *

(Line + load + thermal)

Output Voltage Trim

Efficiency

Ambient temperature : +25°c

Ui nominal, 75% load

At 105°c baseplate

Ui min. to max.

Full temperature range

Ui min. to max.

Ui nominal

Full load

BW = 20MHz

Ui min. to max.

0% to full load

As function of output voltage

Ui nominal

Full load

Please consult factory

Note * : These performances are measured with the sense line connected..

Note ** : It is recommended to mount the converter on a heatsink for this test, see section 10-3 and 10-9 for further details.

Note *** : The ripple output voltage is the periodic AC component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered.

This noise can be reduced by adding 4 external decoupling capacitors connected between inputs and case and between outputs and case. These capacitance should

be layed-out as close as possible from the converter. Please refer to page 8 for more details.

©

Gaia Converter FC03-032.03/06 Revision G

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For locations, phone, fax, E-Mail see back cover

MGDM-75 Series

4- Electrical Characteristics (continued)

Typical efficiency MGDS75HB at 25°C

83%

80%

78%

75%

73%

70%

68%

65%

63%

60%

5

10

15

20

25

30

35

40

45

10W

20W

30W

40W

50W

Hi-Rel

Grade

Typical efficiency MGDS75HC at 25°C

83%

80%

78%

75%

73%

70%

68%

65%

63%

60%

5

10

15

20

25

30

35

40

45

15W

30W

45W

60W

75W

Input voltage Vin (Vdc)

Typical efficiency MGDS75HE at 25°C

88%

86%

84%

82%

80%

78%

76%

74%

72%

70%

68%

5

10

15

20

25

30

35

40

45

15W

30W

45W

60W

75W

Typical efficiency MGDS75HF at 25°C

89%

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

74%

73%

5

10

15

20

25

30

35

40

45

15W

30W

45W

60W

75W

4

Input voltage Vin (Vdc)

Typical efficiency MGDS75HJ at 25°C

88%

85%

83%

80%

78%

75%

73%

70%

68%

65%

63%

60%

58%

5

10

15

20

25

30

35

40

45

15W

30W

45W

60W

75W

Input voltage Vin (Vdc)

©

Gaia Converter FC03-032.03/06 Revision G

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For locations, phone, fax, E-Mail see back cover

MGDS-75-H-FT

MGDS-75-H-FT Overview

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