MGDS-150-H-J/T_技术文档

Hi-Rel DC/ DC CONVERTER

MGDM-150 : 150W POWER

Hi-Rel

Grade

5:1 Low Input Voltage : 9-45 & 16-80 VDC

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 half brick package

• Power up to 150 W

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

• High efficiency (typ. 86%-90%)

• Soft start

1-General

• Galvanic isolation 1.500 VDC

• Integrated LC EMI filter

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 and

overvoltage lock-out, output overvoltage protec-

tion, output current limitation protection, and

temperature protection. 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

substrate to ensure optimum power dissipation

under harsh environmental conditions.

The MGDM-150 low input voltage 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. Stan-

dard models are available with ultra wide input

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

include single output voltage choices of 3,3, 5,

12, 15, 24, 28 volts.

• Synchronizable

•

Load sharing, N+1 redundancy

• No load to full load operation

• Fully protected by independant security

• Under & overvoltage lock-out

• Overvoltage protection

4

• Current limitation protection

• Over temperature protection

• No optocoupler for high reliability

The MGDM-150 low input voltage series include

synchronization load sharing, trim and sense

functions.

The synchronization function allows to synchronize

more than one converter to one frequency or an

external source frequency. The load sharing allows

parallel operation to increase power with a true

N+1.

2-Product Selection

Single output model : MGDS-150-

(/ T) and/ or (/ S)

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

(/ S) : option for screening and serialization

Input Voltage Range

Permanent

Output

B : 3.3 VDC

C

: 5 VDC

H : 9-45 VDC

O : 16-80 VDC

E : 12 VDC

F : 15 VDC

I

J

:

24 VDC

28 VDC

REDEFINING THE SOURCE OF POWER

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MGDM-150 Low Input Series

2- Product Selection (continued)

Input range

Output

Current

Reference

Options

9-45 VDC

3.3 VDC

5 VDC

12 VDC

15 VDC

24 VDC

28 VDC

30 A

25 A

12,5 A

10 A

6,25 A

5,35 A

MGDS-150-H-B

MGDS-150-H-C

MGDS-150-H-E

MGDS-150-H-F

MGDS-150-H-I

MGDS-150-H-J

/ T , / S

16-80 VDC

3.3 VDC

5 VDC

12 VDC

15 VDC

24 VDC

28 VDC

30 A

12,5 A

10 A

6,25 A

5,35 A

MGDS-150-O-B

MGDS-150-O-C

MGDS-150-O-E

MGDS-150-O-F

MGDS-150-O-I

MGDS-150-O-J

/ T , / S

4

Converter Selection Chart

M G D S - 150 - 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»)

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MGDM-150 Low Input Series

3- Block Diagram

The MGDM-150 low input series DC/ DC converter is

based on a constant 420KHz pulse-width modulated

forward topology designed for ultra large input

range.

As this auxilliary power is independent from the main

power supply, the module features an extreme wide

trim windows from 10% to 110% of the nominal

output voltage.

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.

The main power transformer designed for more than

150W power is a multi-layer planar transformer which

allows 100% reproductibility for optized module

efficiencies.

An auxilliary supply is implemented to feed

independently all security functions such as the input

undervoltage lock-out (UVLO), overvoltage lock-out

(OVLO), the output overload protection (OCP), the

output overvoltage protection (OVP) and the ther-

mal protection (OTP).

The controlled feedback regulation is located at the

secondary side allowing a high regulation bandwidth

and a very fast response to load changes.

4

3

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MGDM-150 Low Input Series

4- Electrical Specifications

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

Single Output MGDS-150

Limit or

typical

Parameter

Conditions

Units

150 - H

150 - O

Input

Nominal input voltage

Full temperature range

Nominal

VDC

24

28

Permanent input

voltage range (Ui)

Min. - Max.

9 - 45

16 - 80

Above OVLO converter

Turns - off

Input surge withstand

Maximum

VDC/ min.

50/ 1

100/ 1

Undervoltage lock-out

(UVLO)

Turn-on voltage

Turn-off voltage

Nominal

VDC

8,5

7,5

15,5

14,5

Overvoltage lock-out

(OVLO)

Turn-on voltage

Turn-off voltage

Nominal

VDC

45

46

80

81

Ui nominal

Start up time

Nominal output

Full load : resistive

Maximum

Typical

ms

30

200

1

30

500

1

Ui nominal, full load

BW = 20MHz

Reflected ripple current

mApp

A

Input current in short

circuit

mode (Average)

Ui nominal

Short-circuit

Ui nominal

No load

No load input current

Maximum

mA

30

15

30

15

Input current in inhibit

mode

Ui nominal

Inhibit

Output

4

Nominal

VDC

3,3

5

12

15

24

28

3,3

5

12

15

24

28

Output voltage *

Ui min. to max.

Ambient temperature : +25°c

Ui nominal, 75% load

Set Point accuracy *

Output power **

Maximum

%

+/ - 2

At 105°c baseplate

Ui min. to max.

W

100 to 150

Output current **

3,3V output

5V output

12V output

15V output

24V output

28V output

Maximum

A

30

25

12,5

10

6,25

5,35

30

12,5

10

6,25

5,35

Full temperature range

Ui min. to max.

Ripple output voltage ***

3,3V and 5V output

12V output

15V output

24V and 28V output

Typical

mVpp

50

Ui nominal

Full load

BW = 20MHz

100

150

250

100

150

250

Output regulation *

(Line + load + thermal)

Ui min. to max.

0% to full load

Maximum

%

+/ - 1

Minimum

Maximum

%

10 **

110

10 **

110

Output Voltage Trim

Efficiency

As function of output voltage

Ui nominal

Full load

Typical

%

see curves page 5 and 6

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.

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MGDM-150 Low Input Series

4- Electrical Characteristics (continued)

Typical efficiency MGDS-150-H-B at 25˚C

Typical efficiency MGDS-150-H-C at 25˚C

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

74%

73%

90%

89%

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

25W

50W

75W

100W

25W

50W

75W

100W

125W

5

10

15

20

25

30

35

40

45

5

10

15

20

25

30

35

40

45

Input voltage Vin (Vdc)

Typical efficiency MGDS-150-H-E at 25˚C

Typical efficiency MGDS-150-H-F at 25˚C

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

74%

73%

72%

71%

4

25W

50W

75W

100W

125W

150W

100W

125W

150W

5

10

15

20

25

30

35

40

45

5

10

15

20

25

30

35

40

45

Input voltage Vin (Vdc)

Typical efficiency MGDS-150-H-J at 25˚C

Typical efficiency MGDS-150-H-I at 25˚C

88%

86%

84%

82%

80%

78%

76%

74%

72%

70%

68%

89%

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

74%

25W

50W

75W

100W

125W

150W

100W

125W

150W

5

10

15

20

25

30

35

40

45

5

10

15

20

25

30

35

40

45

Input voltage Vin (Vdc)

5

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MGDM-150 Low Input Series

4- Electrical Characteristics (continued)

Typical efficiency MGDS-150-O-B at 25˚C

Typical efficiency MGDS-150-O-C at 25˚C

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

74%

73%

90%

89%

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

25W

50W

75W

100W

25W

50W

75W

100W

125W

150W

10

20

30

40

50

60

70

80

10

20

30

40

50

60

70

80

Input voltage Vin (Vdc)

Typical efficiency MGDS-150-O-E at 25˚C

Typical efficiency MGDS-150-O-F at 25˚C

90%

89%

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

75%

92%

91%

90%

89%

88%

87%

86%

85%

84%

83%

82%

81%

80%

79%

78%

77%

76%

4

25W

50W

75W

100W

125W

150W

100W

125W

150W

10

20

30

40

50

60

70

80

10

20

30

40

50

60

70

80

Input voltage Vin (Vdc)

Typical efficiency MGDS-150-O-I at 25˚C

Typical efficiency MGDS-150-O-J at 25˚C

90%

88%

86%

84%

82%

80%

78%

76%

74%

72%

70%

90%

88%

85%

83%

80%

78%

75%

73%

70%

68%

25W

50W

75W

100W

125W

150W

100W

125W

150W

10

20

30

40

50

60

70

80

10

20

30

40

50

60

70

80

Input voltage Vin (Vdc)

6

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MGDM-150 Low Input Series

5- Switching Frequency

Parameter

Conditions

Limit or typical

Specifications

Full temperature range

Ui min. to max.

Switching frequency

Nominal, fixed

420 KHz

No load to full load

6- Isolation

Parameter

Conditions

Limit or typical

Specifications

Input to output

Input to case

Output to case

Minimum

1.500 VDC / 1 min

Electric strength test voltage

Isolation resistance

500 VDC

Minimum

100 MOhm

7- Protection Functions

4

Characteristics

Protection Device

Recovery

Limit or typical

Specifications

Turn-on, turn-off circuit

with hysteresis cycle

Automatic

recovery

Turn-on nominal

Turn-off nominal

Input undervoltage lock-out (UVLO)

See section 4

Turn-on, turn-off circuit

with hysteresis cycle

Automatic

recovery

Turn-on nominal

Turn-off nominal

Input overvoltage lock-out (OVLO)

See section 4

Output current limitation protection

(OCP)

Foldback current

limitation

Automatic

recovery

110% of

output current

Maximum

Typical

115% to 135%

of output

voltage

Overvoltage protection

device with latch-up

Output overvoltage protection (OVP)

Over temperature protection (OTP)

Resetable

Thermal device with

hysteresis cycle

Automatic

recovery

Maximum

115°C

8- Reliability Data

Characteristics

Conditions

Temperature

Specifications

Case at 40°C

Case at 85°C

400.000 Hrs

130.000 Hrs

Ground fixed (Gf)

Mean Time Between Failure (MTBF)

According to MIL-HDBK-217F

Airborne, Inhabited,

Cargo (AIC)

Case at 40°C

Case at 85°C

225.000 Hrs

82.000 Hrs

Mean Time Between Failure (MTBF)

According to IEC-62380-TR

Avionics Military Cargo

/

Consult factory

7

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MGDM-150 Low Input Series

9- Electromagnetic Interference

Electromagnetic Interference requirements according to MIL-STD-461C/ D/ E standards can be easily achieved as indicated in

the following section. The following table resumes the different sections covered by these standards.

MIL-STD-461C

Standard

MIL-STD-461D/E

Standard

Compliance with GAIA Converter

Module & common mode capacitance

Standard Requirements

Conducted emission (CE) :

Low frequency

High frequency

CE 01

CE 03

CE 101

CE 102

compliant module stand-alone

compliant with additionnal filter

Conducted susceptibility (CS) :

Low frequency

High frequency

CS 01

CS 02

CS 101

CS114

compliant with additionnal filter

Radiated emission (RE) :

Magnetic field

Electrical field

RE 01

RE 02

RE 101

RE 102

compliant module stand-alone

Radiated susceptibility (RS) :

Magnetic field

Electrical field

RS 01

RS 03

RS 101

RS 103

compliant module stand-alone

Applicability

H, O input module

see EMI datasheet

4

9-1 Module Compliance with MIL-STD-461C/ D/ E Standards

To meet the latest US military standards MIL-STD-461D/ E (and also the MIL-STD-461C) requirements and in particular the

conducted noise emission CE102 (and also CE03) requirements, Gaïa Converter can propose a stand-alone ready-to-use EMI

filter module. This EMI filter module has to be used together with 4 external decoupling capacitance C (10nF/ rated

c

voltage depending on isolation requirement) connected between input and case and output and case.

Please consult EMI filter datasheet for further details.

Cc

BP

Vo

VI

GI

Vo

Go

VI

GI

EMI input Filter

MGDM-series

Go

BP

Cc

BP: Base Plate

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10- Thermal Characteristics

Characteristics

Conditions

Limit or typical

Performances

- 40°C

Operating ambient temperature range

at full load

Minimum

Maximum

Ambient temperature *

see section below

Minimum

Maximum

- 40°C

+ 105°C

Baseplate temperature

Storage temperature range

Thermal resistance

Base plate temperature

Non functionning

Minimum

Maximum

- 55°C

+ 125°C

Baseplate to ambient

Rth(b-a) free air

Typical

8°C/W

Note * : The upper temperature range depends on configuration, the user must assure a max. baseplate temperature of + 105°C.

The MGDM-150 low input series maximum baseplate

temperature at full load must not exceed 105°C. Heat can

be removed from the baseplate via three basic

mechanisms :

To calculate a maximum admissible ambient temperature

the following method can be used.

Knowing the maximum baseplate temparature Tbase =

105°C of the module, the power used Pout and the

efficiency h:

• Radiation transfert : radiation is counting for less

than 5% of total heat transfert in majority of case, for

this reason the presence of radient cooling is used as

a safety margin and is not considered.

• determine the power dissipated by the module Pdiss

that should be evacuated :

Pdiss = Pout(1/ h- 1) (A)

•

determine the maximum ambient temperature :

Ta = 105° C - Rth(b-a) x Pdiss (B)

• Conduction transfert : in most of the applications,

heat will be conducted from the baseplate into an

attached heatsink or heat conducting member; heat is

conducted thruthe interface.

where Rth(b-a) is the thermal resistance from the

baseplate to ambient.

This thermal Rth(b-a) resistance is the summ of :

• Convection transfert : convecting heat t r a n s f e r

into air refers to still air or forced air cooling.

• the thermal resistance of baseplate to heatsink

4

(Rth(b-h)). The interface between baseplate and

heatsink can be nothing or a conducting member, a

thermal compound, a thermal pad.... The value of

Rth(b-h) can range from 0.4°C/ W for no interface down

to 0.1°C/ W for a thermal conductive member inter-

face.

• the thermal resistance of heatsink to ambient air

(Rth(h-a)), which is depending of air flow and given

by heatsink supplier.

In majority of the applications, heat will be removed from

the baseplate either with :

•

heatsink,

forced air cooling,

both heatsink and forced air cooling.

The table hereafter gives some example of thermal resistance for different heat transfert configurations.

Thermal resistance baseplate to

Global

resistance

Heat transfert

Thermal resistance heatsink to air Rth(h-a)

heatsink

No need of thermal pad

Berquist Silpad* :

No Heatsink baseplate only :

8°C/ W

4,54°C/ W

3,94°C/ W

4,5°C/ W

Free air cooling

only

Heatsink Thermalloy 6516B :

4,4°C/ W

3,8°C/ W

4,5°C/ W

3°C/W

0,14°C/W

Heatsink Fischer Elektronik SK DC 5159SA :

No Heatsink baseplate only :

Berquist Silpad* :

No need of thermal pad

Berquist Silpad* :

Forced air cooling

200 LFM

Heatsink Thermalloy 6516B :

0,14°C/W

3,14°C/ W

2,64°C/ W

3,2°C/ W

Heatsink Fischer Elektronik SK DC 5159SA :

No Heatsink baseplate only :

2,5°C/ W

3,2°C/ W

1,75°C/W

1,7°C/ W

0,9°C/ W

Berquist Silpad* :

No need of thermal pad

Forced air cooling

400 LFM

Heatsink Thermalloy 6516B :

Berquist Silpad* :

No need of thermal pad

Berquist Silpad* :

0,14°C/W

1,89°C/ W

1,84°C/ W

1,7°C/ W

Heatsink Fischer Elektronik SK DC 5159SA :

No Heatsink baseplate only :

Forced air cooling

1000 LFM

Heatsink Fischer Elektronik SK DC 5159SA :

0,14°C/W

1,04°C/ W

Fischer Elektronic and Thermalloy are heasink manufacturers. «Silpad» © is a registered trademark of Berquist.

Note* : Silpad performance are for Silpad 400 with pressure conditions of 50 Psi. Surface of MGDS-150 series is 5,5 inch2.

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10- Thermal Characteristics (continued)

The two formulas (A) and (B) described in previous page :

• Pdiss = Pout(1/ h- 1) (A)

In particular, as example the following typical curves are

calculated with :

• no heatsink

• Ta = 105° C - Rth(b-a) x Pdiss (B)

• a Fischer Elektronik heatsink reference SKDC5159SA

and a Berquist «Silpad» for various cooling conditions.

conduct to curves determining the ambient temperature

admissible as a function of output power for various heat

transfert conditions.

MGDS-150-H-x Series Thermal Curves

150

140

130

120

110

100

90

80

70

60

50

no heatsink

no heatsink 200LFM

no heatsink 400 LFM

no heatsink 1000 LFM

heatsink

heatsink 200 LFM

heatsink 400 LFM

heatsink 1000 LFM

40

4

30

20

10

0

10

20

30

40

50

60

70

80

90 100 110

Ambient temperature (°C)

MGDS-150-O-x Series Thermal Curves

150

140

130

120

110

100

90

80

70

60

50

no heatsink

no heatsink 200LFM

no heatsink 400 LFM

no heatsink 1000 LFM

heatsink

heatsink 200 LFM

heatsink 400 LFM

heatsink 1000 LFM

40

30

20

10

0

10

20

30

40

50

60

70

80

90 100 110

Ambient temperature (°C)

10

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11- Environmental Qualifications

The modules have been subjected to the following environmental qualifications.

Characteristics

Conditions

Severity

Test procedure

Climatic Qualifications

Duration

Temperature / status of unit

Test D : 1.000 Hrs

@ 105°C case, unit operating

@ 125°C ambient, unit not operating

Life at high

temperature

MIL-STD-202G

Method 108A

Altitude level C

Duration

Climb up

Stabilization

Status of unit

40.000 ft@-55°C

30 min.

1.000 ft/ min to 70.000 f@-55°C,

30 min.

MIL-STD-810E

Method 500.3

Altitude

unit operating

Number of cycle

10

Cycle duration

Cycle I : 24 Hrs

60 % to 88 %

31°C to 41°C

unit not operating

MIL-STD-810E

Method 507.3

Humidity cyclic

Relative humidity variation

Temperature variation

Status of unit

Damp heat

Temperature

Duration

93 % relative humidity

40°C

56 days

MIL-STD-202G

Method 103B

Humidity steady

Salt atmosphere

Status of unit

unit not operating

Temperature

Concentration NaCl

Duration

35°C

5 %

48 Hrs

MIL-STD-810E

Method 509.3

Status of unit

unit not operating

Number of cycles

Temperature change

Transfert time

Steady state time

Status of unit

200

-40°C / +85°C

40 min.

20 min.

Temperature

cycling

MIL-STD-202A

Method 102A

4

unit operating

Number of shocks

Temperature change

Transfert time

Steady state time

Status of unit

100

-55°C / +105°C

10 sec.

20 min.

MIL-STD-202G

Method 107G

Temperature shock

unit not operating

Mechanical Qualifications

Number of cycles

10 cycles in each axis

10 to 60 Hz / 0.7 mm

60 to 2000 Hz / 10 g

2h 30 min. per axis

unit not operating

Frequency / amplitude

Frequency / acceleration

Duration

Vibration

(Sinusoidal)

MIL-STD-810D

Method 514.3

Status of unit

Number of shocks

Peak acceleration

Duration

Shock form

Status of unit

3 shocks in each axis

100 g

6 ms

1/ 2 sinusoidal

unit not operating

Shock

(Half sinus)

MIL-STD-810D

Method 516.3

Number of bumps

Peak acceleration

Duration

2000 Bumps in each axis

40 g

6 ms

Bump

(Half sinus)

MIL-STD-810D

Method 516.3

Status of unit

unit not operating

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MGDM-150 Low Input Series

12- Description of Protections

The MGDM-150 low input series include 5 types of protection

devices that are powered and controlled by a fully independant

side power stage.

12-1 Input Undervoltage Lockout (UVLO) and

Overvoltage Lockout (OVLO)

12-1-1 Undervoltage Lockout (UVLO)

An undervoltage protection is implemented to lock off the

converter as long as the input voltage has not reached the

UVLO turn-on threshold (see section 4 for value) which is the

minimum input voltage required to operate without damaging

the converter.

On

12-1-2 Overvoltage Lockout (OVLO)

Off

An overvoltage protection will inhibit the module when input

voltage reaches the overvoltage lockout turn-off threshold (see

section 4 for value) and restores to normal operation

automatically when the input voltage drops below the

overvoltage Lockout turn on threshold.

Vin

UVLO UVLO

OVLO

Turn-off Turn-on

Turn-on

Turn-off

12-2 Output Over Current Protection (OCP)

Vout

The MGDM-150 low input series incorporates a foldback current

limit and protection circuit. When the output current reaches

110% of it’s full-rated current (Icurrent limit), the output vol-

tage falls and output current falls along the foldback line as

described in the figure herein. The module restart automatically

to normal operation when overcurrent is removed.

4

Icurrent limit

Iout

110% of full

rated current

12-3 Output Overvoltage Protection (OVP)

Each circuit has an internal overvoltage protection circuit that

monitors the voltage accross the output power terminals.

It is designed to latch the converter off at 115% to 135% of

output voltage.

Once in OVP protection, the module will restart with the On/

Off function or with the input bus restart.

12-4 Over Temperature Protection (OTP)

On

A thermal protection device adjusted at 115°C (+/ -5%) internal

temperature with 10°C hysteresis cycle will inhibit the mo-

dule as long as the overheat is present and restores to nor-

mal operation automatically when overheat is removed. The

efficiency of the OTP function is warranty with the module

mounted on a heatsink.

Off

10˚c

Baseplate

Temperature

115˚c

12

Gaia Converter FC02-009.08/ 06 Revision N

©

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

Hi-Rel

Grade

MGDM-150 Low Input Series

13- Description of Functions

13-1 Trim Function

The output voltage Vo may be trimmed in a range of

10%/ 110% of the nominal output voltage via a single external

trimpot or fixed resistor.

Trim Up Function

BP

5

4

6

7

Do not attempt to trim the module higher than 110% of

nominal output voltage as the overvoltage protection may

occur.

Also do not exceed the maximum rated output power when

the module is trimmed up.

The trim up resistor must be connected to S+ pin.

The trim up resistance must be calculated with the following

formula :

Vin

Vo

S+

MGDM150

On/ Off

Share

Sync

Gin

Ru

Error amp.

3

2

1

8

Trim

Load

R1

R2

1µF

Vref=

2.5V

9

S-

10

Go

Ru = R1 x (V0-Vref) x V0nom - R1 - R2

(V0-V0nom) x Vref

Trim Down Function

BP

5

4

6

7

Vin

Vo

S+

Do not trim down more than -90% of nominal output vol-

tage or 1 Vdc.

MGDM150

On/ Off

Share

Sync

Gin

The available output power is reduced by the same

percentage that output voltage is trimmed down.

The trim down resistor must be connected to S- pin.

The trim down resistance must be calculated with the

following formula :

Error amp.

3

2

1

8

Trim

Load

R1

R2

1µF

4

Vref=

2.5V

Rd

9

S-

10

Go

Rd = (R2 + R1) x V0 - (R2 x V0nom)

V0nom - V0

5

4

6

7

Vin

Vo

S+

Trim via a voltage

MGDM150

The output voltage is given by the following formula :

On/ Off

Share

Sync

Gin

V0 = (1 +

R1 x (Vcont

(R1 + R2) Vref

- 1) ) x V0nom

Ru

Error amp.

R1

100nF

8

Trim

3

2

1

R2

Load

BAT54

Vref=

2.5V

1µF

Vcontrol

9

S-

10

Go

Parameter

Unit

Min.

Typ.

2,5

3800

270

1

Max.

Trim reference

Resistor R1

Resistor R2

Trim capacitor

Vdc

Ohm

µF

2,45

2,55

/

13

Gaia Converter FC02-009.08/ 06 Revision N

©

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

Hi-Rel

Grade

MGDM-150 Low Input Series

13- Description of Functions (continued)

13-2 Sense Function

If the load is separated from the output by any line lenght,

some of these performance characteristics will be degraded

at the load terminals by an amount proportional to the

impedance of the load leads. Sense connections enable to

compensate the line drop at a maximum of +/ -10% of output

voltage. The overvoltage protection will be activated and module

will shut down if remote sense tries to boost output voltage

above 110% of nominal output voltage. Connection is described

in figure herein.

BP

5

4

6

Vin

Vo

7

S+

On/ Off

Share

Sync

8

3

2

1

Trim

MGDM150

Load

9

S-

10

Gin

Go

13-3 On/ Off Function

The control pin 4 (On/ Off) can be used for applications requiring

On/ Off operation. This may be done with an open collector

transistor, a switch, a relay or an optocoupler. Several

converters may be disabled with a single switch by connecting

all

BP

5

4

6

7

Vin

Vi

Vo

S+

On/ Off

Share

Sync

Gin

8

3

2

1

Trim

MGDM150

Load

On/ Off pins together.

On/ Off

Gi

• The converter is disabled by pulling low the pin 4.

• No connection or high impedance on pin 4 enables the

converter.

9

S-

10

Go

By releasing the On/ Off function, the converter will restart

within the start up time specifications given in table section

4. For further details please consult ‘’Logic On/Off’’ application note.

4

Parameter

Unit

Vdc

ms

Min.

Typ.

Max.

4

Notes, conditions

On/Off module enable voltage

On/Off module disable voltage

On/Off alarm level

3.5

0

/

Open, the switch must not sink more than 100µA

The switch must be able to sink 1mA

0.5

30

0

UVLO, OVLO, OVP, OTP, faulty module

On/ Off module enable delay

On/Off module disable delay

/

The module restarts with the same delay after alarm mode removed

Vi nominal, full load

µs

/

100

13-4 Synchronization Function

An external clock with rectangular «Pull Up» signals can be

used to lock one or more converters. The external clock si-

gnal should have a frequency range from 860KHz to 940KHz,

a low level below 0,5V a high level of 4V (+/ -0.5V), a rise

time of 30 ns max. and a drop time of 100ns max.

BP

5

4

6

7

Vi

Vin

Vo

S+

On/ Off

Share

Sync

Gin

100pF

8

3

2

1

Vsync

Trim

MGDM150

Load

Ext. clock

Totem pole

output

9

4V

+/ - 0,5

S-

4.7k

1N4148

10

Gi

Go

0V

Vin

30ns

max

T/ 2

100ns

max

T

( 860Khz < F < 940Khz )

14

Gaia Converter FC02-009.08/ 06 Revision N

©

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

Hi-Rel

Grade

MGDM-150 Low Input Series

14- Application Notes

14-1 Synchronization of Modules

10nF

BP

5

6

7

Vin

Vo

S+

The MGDM-150 low input series provides a synchronization

function trough the pin 2 (Synchro) to enable automatic

synchronisation between several converters.

If several converters are used, they lock themselves into

the highest switching frequency.

The synchronization signal available on pin 2 is referenced

to ground in (Gi) and the signal shape is the double of the

switching frequency (i.e 2x420KHz). It is a rectangular

signal with 3.5 Vp (+/ -0.5V) amplitude with an impedance

of 4,7 KOhm on low level.

4

On/ Off

8

3

Share

Trim

MGDM150

2

Sync

9

S-

1

10

Gin

Go

BP

10nF

(*)

10nF

BP

5

6

7

Vin

Vo

S+

4

On/ Off

3

8

Share

Trim

MGDM150

On/ Off

2

Sync

9

S-

1

10

Gin

Go

BP

10nF

(*)BP: Base Plate

14-2 Connection of Modules in Series

10nF

BP

5

6

Vin

Vo

The output of single output units can be connected in

series without any precautions to provide higher output

voltage level.

Nevertheless, GAIA Converter recommends to protect each

individual output by a low power shottky diode rated with

the maximum current of the converter to avoid reverse

polarity at any output.

7

4

S+

On/ Off

Share

Sync

Gin

100µF

3

2

1

8

Trim

MGDM150

9

S-

10

Go

4

BP

10nF

(*)

Reverse polarity may occur at start up if the output volta-

ges do not rise at the same time.

10nF

BP

MGDM150

BP

5

6

7

Vin

Vo

S+

4

On/ Off

Share

Sync

Gin

100µF

3

2

1

8

Trim

9

S-

10

Go

10nF

(*)BP: Base Plate

10nF

14-3 Connection of Modules in Parallel

BP

5

6

Vin

Vo

7

4

S+

On/ Off

Share

Sync

Gin

The MGDM-150 low input series features a «parallel

operation function» to increase the output power capability

of a single unit by connecting the outputs of 2 or more

converters in parallel. By connecting the «Share» pin of

each module together, the units will share the load current

equally within a few percent. Up to 5 converters can be

parallelized.

100µF

3

2

1

8

Trim

MGDM150

9

S-

10

Go

BP

10nF

(*)

The «Share» signal is a DC voltage which varies between

0Vdc and 5Vdc referenced to «Sense -» and depending on

the output load.

10nF

BP

MGDM150

BP

5

6

7

Vin

Vo

S+

4

On/ Off

Share

Sync

Gin

100µF

3

2

1

8

Trim

9

S-

10

Go

10nF

(*)BP: Base Plate

15

Gaia Converter FC02-009.08/ 06 Revision N

©

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

Hi-Rel

Grade

MGDM-150 Low Input Series

15- Dimensions

Dimensions are given in mm (inches). Tolerance : +/ - 0,2 mm (+/ - 0.01 “) unless otherwise indicated.

Weight : 110 grams (3,9 Ozs) max.

Mouting Hole

0 3,1 (0,122)

9,894

(0.39)

10,16

(0.4)

7,62 7,62

(0.3) (0.3)

10,16

(0.4)

7,62

(0.3)

0,5 (0.019)

5,08 (0.2)

Uncoated

metal header

Use this side

for heat sinking

5,6 min

(0.22)

R2.4 (0,1)

50,8

(2.00)

60,95

CH 2x2

12,7 Max

(0.5)

6,8 max

(0.267)

(2.40)

Pin dimensions :

Metallic case alodyned coating solder plated pin

Pins : 1, 2, 3, 4, 5, 7, 8, 9 : Ø 1 mm (0.04”)

Pins : 6, 10 : Ø 2 mm (0.08”)

4

16- Product marking

Side face : Company logo, module reference, option,

date code : year and week of manufacturing

17- Connections

1

Single Output

- Input (Gi)

Synchro (Sync)

Share

10

9

8

7

6

2

3

4

On/ Off

5

+ Input (Vi)

+ Output (Vo)

Sense + (S+)

Trim (Trim)

Sense - (S-)

- Output (Go)

6

7

8

9

1

2

3

4

5

10

Bottom view

16

Gaia Converter FC02-009.08/ 06 Revision N

©

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

For more detailed specifications and applications information, contact :

International Headquarters

GAÏA Converter - France

ZI de la Morandière

North American Headquarters

GAÏA Converter Canada, Inc

4038 Le Corbusier Blvd

33185 LE HAILLAN - FRANCE LAVAL, QUEBEC - CANADA H7L 5R2

Tel. : + (33)-5-57-92-12-80

Fax : + (33)-5-57-92-12-89

Tel. : (514)-333-3169

Fax : (514)-333-4519

Represented by :

Information given in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed for the consequence of its use nor for any infringement of patents or other rights of third parties which may result from its use.

These products are sold only according to GAIA Converter general conditions of sale, unless otherwise confirmed by writing. Specifications subject to change without notice.


型号：	MGDS-150-H-J/T
厂家：	ETC
描述：	Hi-Rel DC/DC CONVERTER 高可靠性DC / DC转换器转换器
文件：	总17页 (文件大小：495K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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