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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 : -40C/+ 105 baseplate * High efficiency (typ. 86%-90%) * Soft start * Galvanic isolation 1.500 VDC * Integrated LC EMI filter * Synchronizable * Load sharing, N+1 redundancy * No load to full load operation * Fully protected by independant security * Under & overvoltage lock-out * Overvoltage protection * Current limitation protection * Over temperature protection * No optocoupler for high reliability 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. Standard 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. 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. 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 protection, 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.
1-General
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2-Product Selection
Single output model : MGDS-150(/T) and/or (/S)
(/T) : option for -55C 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
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MGDM-150 Low Input Series 2- Product Selection (continued)
Hi-Rel Grade
Input range
Output
Current
Reference
Options
9-45 9-45 9-45 9-45 9-45 9-45 16-80 16-80 16-80 16-80 16-80 16-80
VDC VDC VDC VDC VDC VDC VDC VDC VDC VDC VDC 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
30 A 25 A 12,5 A 10 A 6,25 A 5,35 A 30 A 30 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 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 /T /T /T /T /T /T /T /T /T /T /T
, , , , , , , , , , , ,
/S /S /S /S /S /S /S /S /S /S /S /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) : -55C 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. 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), overvoltage lock-out (OVLO), the output overload protection (OCP), the output 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 an extreme wide trim windows from 10% to 110% of the nominal output voltage. The main power transformer designed for more than 150W power is a multi-layer planar transformer which allows 100% reproductibility for optized 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.
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MGDM-150 Low Input Series 4- Electrical Specifications
Data are valid at +25C, unless otherwise specified.
Parameter Input Nominal input voltage Permanent input voltage range (Ui) Input surge withstand Undervoltage lock-out (UVLO) Overvoltage lock-out (OVLO) Start up time Reflected ripple current Input current in short circuit mode (Average) No load input current Input current in inhibit mode Output Conditions Limit or typical Nominal Min. - Max. Maximum Nominal Nominal Nominal Nominal Maximum Maximum Typical Maximum Maximum Units
Hi-Rel Grade
Single Output MGDS-150 150 - H 24 9 - 45 50/1 8,5 7,5 45 46 30 200 1 30 15 150 - O 28 16 - 80 100/1 15,5 14,5 80 81 30 500 1 30 15
Full temperature range Full temperature range Above OVLO converter Turns - off Turn-on voltage Turn-off voltage 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 VDC VDC/min. VDC VDC VDC VDC ms mApp A mA mA
Output voltage *
Ui min. to max.
Nominal Nominal Nominal Nominal Nominal Nominal Maximum Maximum Maximum Maximum Maximum Maximum Maximum Maximum Typical Typical Typical Typical Maximum Minimum Maximum Typical
VDC VDC VDC VDC VDC VDC % W A A A A A A mVpp mVpp mVpp mVpp % % % %
3,3 5 12 15 24 28 +/- 2 100 to 150 30 25 12,5 10 6,25 5,35 50 100 150 250 +/- 1 10 ** 110
3,3 5 12 15 24 28 +/- 2 100 to 150 30 30 12,5 10 6,25 5,35 50 100 150 250 +/- 1 10 ** 110
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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 : +25c Ui nominal, 75% load At 105c 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
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 25C
85% 84% 83% 82%
Hi-Rel Grade
Typical efficiency MGDS-150-H-C at 25C
90% 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 77% 76% 75% 5 10 15 20 25 30 35 40 45
Efficiency (%)
81% 80% 79% 78% 77% 76% 75% 74% 73% 5 10 15 20 25 30 35 40 45
25W 50W 75W 100W
Efficiency (%)
25W 50W 75W 100W 125W
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Typical efficiency MGDS-150-H-E at 25C
88% 87% 86% 85%
87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 77% 76% 75% 74% 73% 72% 71%
Typical efficiency MGDS-150-H-F at 25C
Efficiency (%)
84% 83% 82% 81% 80% 79% 78% 77% 5 10 15 20 25 30 35 40 45
25W 50W 75W 100W 125W 150W
Efficiency (%)
4
25W 50W 75W 100W 125W 150W
5
10
15
20
25
30
35
40
45
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Typical efficiency MGDS-150-H-I at 25C
89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 77% 76% 75% 74% 5 10 15 20 25 30 35 40 45
Typical efficiency MGDS-150-H-J at 25C
88% 86% 84%
Efficiency (%)
Efficiency (%)
82% 80% 78% 76% 74% 72% 70% 68% 5 10 15 20 25 30 35 40 45
25W 50W 75W 100W 125W 150W
25W 50W 75W 100W 125W 150W
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
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MGDM-150 Low Input Series 4- Electrical Characteristics (continued)
Typical efficiency MGDS-150-O-B at 25C
85% 84% 83% 82% 90% 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 77% 76% 75% 10 20 30 40 50 60
Hi-Rel Grade
Typical efficiency MGDS-150-O-C at 25C
Efficiency (%)
81% 80% 79% 78% 77% 76% 75% 74% 73% 10 20 30 40 50 60 70 80
25W 50W 75W 100W
Efficiency (%)
25W 50W 75W 100W 125W 150W
70
80
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Typical efficiency MGDS-150-O-E at 25C
90% 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 77% 76% 75% 10 20 30 40 50 60 70 80
92% 91% 90% 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 77% 76%
Typical efficiency MGDS-150-O-F at 25C
Efficiency (%)
Efficiency (%)
4
25W 50W 75W 100W 125W 150W
25W 50W 75W 100W 125W 150W
10
20
30
40
50
60
70
80
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Typical efficiency MGDS-150-O-I at 25C
90% 88% 86% 90% 88% 85%
Typical efficiency MGDS-150-O-J at 25C
Efficiency (%)
Efficiency (%)
84% 82% 80% 78% 76% 74% 72% 70% 10 20 30 40 50 60 70 80
25W 50W 75W 100W 125W 150W
83% 80% 78% 75% 73% 70% 68% 10 20 30 40 50 60 70 80
25W 50W 75W 100W 125W 150W
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
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MGDM-150 Low Input Series 5- Switching Frequency
Parameter Switching frequency Conditions Full temperature range Ui min. to max. No load to full load Limit or typical Nominal, fixed Specifications 420 KHz
Hi-Rel Grade
6- Isolation
Parameter Electric strength test voltage Isolation resistance Conditions Input to output Input to case Output to case 500 VDC Limit or typical Minimum Minimum Minimum Minimum Specifications 1.500 VDC / 1 min 1.500 VDC / 1 min 1.500 VDC / 1 min 100 MOhm
7- Protection Functions
Characteristics Input undervoltage lock-out (UVLO) Input overvoltage lock-out (OVLO) Output current limitation protection (OCP) Output overvoltage protection (OVP) Over temperature protection (OTP) Protection Device Turn-on, turn-off circuit with hysteresis cycle Turn-on, turn-off circuit with hysteresis cycle Foldback current limitation Overvoltage protection device with latch-up Thermal device with hysteresis cycle Recovery Automatic recovery Automatic recovery Automatic recovery Resetable Automatic recovery Limit or typical Turn-on nominal Turn-off nominal Turn-on nominal Turn-off nominal Maximum Typical Maximum Specifications See section 4 See section 4 110% of output current 115% to 135% of output voltage 115C
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8- Reliability Data
Characteristics Conditions Ground fixed (Gf) Mean Time Between Failure (MTBF) According to MIL-HDBK-217F Airborne, Inhabited, Cargo (AIC) Avionics Military Cargo Temperature Case at 40C Case at 85C Case at 40C Case at 85C / Specifications 400.000 Hrs 130.000 Hrs 225.000 Hrs 82.000 Hrs Consult factory
Mean Time Between Failure (MTBF) According to IEC-62380-TR
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MGDM-150 Low Input Series 9- Electromagnetic Interference
Hi-Rel Grade
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.
Standard Requirements Conducted emission (CE) : Low frequency High frequency Conducted susceptibility (CS) : Low frequency High frequency Radiated emission (RE) : Magnetic field Electrical field Radiated susceptibility (RS) : Magnetic field Electrical field Applicability
MIL-STD-461C Standard CE 01 CE 03 CS 01 CS 02 RE 01 RE 02 RS 01 RS 03 H, O input module
MIL-STD-461D/E Standard CE 101 CE 102 CS 101 CS114 RE 101 RE 102 RS 101 RS 103 H, O input module
Compliance with GAIA Converter Module & common mode capacitance compliant module stand-alone compliant with additionnal filter compliant with additionnal filter compliant with additionnal filter compliant module stand-alone compliant module stand-alone compliant module stand-alone compliant module stand-alone see EMI datasheet
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, Gaia 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 c (10nF/rated voltage depending on isolation requirement) connected between input and case and output and case.
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Please consult EMI filter datasheet for further details.
Cc BP BP VI Vo VI Vo
Cc
EMI input Filter
MGDM-series
GI
Go Cc
GI BP BP
Go Cc
BP: Base Plate
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MGDM-150 Low Input Series 10- Thermal Characteristics
Characteristics Operating ambient temperature range at full load Baseplate temperature Storage temperature range Thermal resistance Conditions Ambient temperature * Base plate temperature Non functionning Baseplate to ambient Rth(b-a) free air Limit or typical Minimum Maximum Minimum Maximum Minimum Maximum Typical Performances
Hi-Rel Grade
- 40C see section below - 40C + 105C - 55C + 125C 8C/W
Note * : The upper temperature range depends on configuration, the user must assure a max. baseplate temperature of + 105C.
The MGDM-150 low input series maximum baseplate temperature at full load must not exceed 105C. Heat can be removed from the baseplate via three basic mechanisms : * 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. * 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. * Convection transfert : convecting heat t r a n s f e r into air refers to still air or forced air cooling. In majority of the applications, heat will be removed from the baseplate either with : * heatsink, * forced air cooling, * both heatsink and forced air cooling.
To calculate a maximum admissible ambient temperature the following method can be used. Knowing the maximum baseplate temparature Tbase = 105C of the module, the power used Pout and the efficiency h: * determine the power dissipated by the module Pdiss that should be evacuated : Pdiss = Pout(1/h - 1) (A) h * determine the maximum ambient temperature : Ta = 105C - Rth(b-a) x Pdiss (B) where Rth(b-a) is the thermal resistance from the baseplate to ambient. This thermal Rth(b-a) resistance is the summ of : * the thermal resistance of baseplate to heatsink (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 0.4C/W for no interface down to 0.1C/W for a thermal conductive member interface. * the thermal resistance of heatsink to ambient air (Rth(h-a)), which is depending of air flow and given by heatsink supplier.
4
The table hereafter gives some example of thermal resistance for different heat transfert configurations.
Heat transfert Thermal resistance heatsink to air Rth(h-a) No Heatsink baseplate only : Free air cooling only Heatsink Thermalloy 6516B : Heatsink Fischer Elektronik SK DC 5159SA : No Heatsink baseplate only : Forced air cooling 200 LFM Heatsink Thermalloy 6516B : Heatsink Fischer Elektronik SK DC 5159SA : No Heatsink baseplate only : Forced air cooling 400 LFM Heatsink Thermalloy 6516B : Heatsink Fischer Elektronik SK DC 5159SA : Forced air cooling 1000 LFM No Heatsink baseplate only : Heatsink Fischer Elektronik SK DC 5159SA : 8C/W 4,4C/W 3,8C/W 4,5C/W 3C/W 2,5C/W 3,2C/W 1,75C/W 1,7C/W 1,7C/W 0,9C/W Thermal resistance baseplate to heatsink No need of thermal pad Berquist Silpad* : Berquist Silpad* : No need of thermal pad Berquist Silpad* : Berquist Silpad* : No need of thermal pad Berquist Silpad* : Berquist Silpad* : No need of thermal pad Berquist Silpad* : 0,14C/W 0,14C/W 0,14C/W 0,14C/W 0,14C/W 0,14C/W 0,14C/W Global resistance 8C/W 4,54C/W 3,94C/W 4,5C/W 3,14C/W 2,64C/W 3,2C/W 1,89C/W 1,84C/W 1,7C/W 1,04C/W
Fischer Elektronic and Thermalloy are heasink manufacturers. Silpad (c) 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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For locations, phone, fax, E-Mail see back cover
MGDM-150 Low Input Series 10- Thermal Characteristics (continued)
The two formulas (A) and (B) described in previous page : * Pdiss = Pout(1/h - 1) h (A) * no heatsink * Ta = 105C - Rth(b-a) x Pdiss (B) conduct to curves determining the ambient temperature admissible as a function of output power for various heat transfert conditions.
Hi-Rel Grade
In particular, as example the following typical curves are calculated with :
* a Fischer Elektronik heatsink reference SKDC5159SA and a Berquist Silpad for various cooling conditions.
MGDS-150-H-x Series Thermal Curves
150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 Ambient temperature (C) 90 100 110
Output power (W)
no heatsink no heatsink 200LFM no heatsink 400 LFM no heatsink 1000 LFM heatsink heatsink 200 LFM heatsink 400 LFM heatsink 1000 LFM
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MGDS-150-O-x Series Thermal Curves
150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 Ambient temperature (C) 90 100 110
Output power (W)
no heatsink no heatsink 200LFM no heatsink 400 LFM no heatsink 1000 LFM heatsink heatsink 200 LFM heatsink 400 LFM heatsink 1000 LFM
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MGDM-150 Low Input Series 11- Environmental Qualifications
The modules have been subjected to the following environmental qualifications.
Hi-Rel Grade
Characteristics Climatic Qualifications Life at high temperature
Conditions
Severity
Test procedure
Duration Temperature / status of unit Altitude level C Duration Climb up Stabilization Status of unit Number of cycle Cycle duration Relative humidity variation Temperature variation Status of unit Damp heat Temperature Duration Status of unit Temperature Concentration NaCl Duration Status of unit Number of cycles Temperature change Transfert time Steady state time Status of unit Number of shocks Temperature change Transfert time Steady state time Status of unit
Test D : 1.000 Hrs @ 105C case, unit operating @ 125C ambient, unit not operating 40.000 ft@-55C 30 min. 1.000 ft/min to 70.000 f@-55C, 30 min. unit operating 10 Cycle I : 24 Hrs 60 % to 88 % 31C to 41C unit not operating 93 % relative humidity 40C 56 days unit not operating 35C 5% 48 Hrs unit not operating 200 -40C / +85C 40 min. 20 min. unit operating 100 -55C / +105C 10 sec. 20 min. unit not operating
MIL-STD-202G Method 108A
Altitude
MIL-STD-810E Method 500.3
Humidity cyclic
MIL-STD-810E Method 507.3
Humidity steady
MIL-STD-202G Method 103B
Salt atmosphere
MIL-STD-810E Method 509.3
Temperature cycling
MIL-STD-202A Method 102A
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Temperature shock
MIL-STD-202G Method 107G
Mechanical Qualifications Number of cycles Frequency / amplitude Frequency / acceleration Duration Status of unit Number of shocks Peak acceleration Duration Shock form Status of unit Number of bumps Peak acceleration Duration Status of unit 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 3 shocks in each axis 100 g 6 ms 1/2 sinusoidal unit not operating 2000 Bumps in each axis 40 g 6 ms unit not operating
Vibration (Sinusoidal)
MIL-STD-810D Method 514.3
Shock (Half sinus)
MIL-STD-810D Method 516.3
Bump (Half sinus)
MIL-STD-810D Method 516.3
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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.
Hi-Rel Grade
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)
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. Off Vin
UVLO UVLO Turn-off Turn-on
OVLO OVLO Turn-on Turn-off
12-2 Output Over Current Protection (OCP)
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 voltage 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.
Vout
Icurrent limit
4
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.
110% of full rated current
Iout
12-4 Over Temperature Protection (OTP)
A thermal protection device adjusted at 115C (+/-5%) internal temperature with 10C hysteresis cycle will inhibit the module as long as the overheat is present and restores to normal operation automatically when overheat is removed. The efficiency of the OTP function is warranty with the module mounted on a heatsink.
On
Off
10c
115c
Baseplate Temperature
12
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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 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 : Ru = R1 x (V0-Vref) x V0nom - R1 - R2 (V0-V0nom) x Vref
5 Vin 4 On/Off
Error amp. R1 Vref= 2.5V R2 1F
Hi-Rel Grade
BP Vo
6 7 Ru
MGDM150
S+
3 Share 2 Sync 1 Gin
Trim 8
Load
S- 9 Go 10
Trim Down Function Do not trim down more than -90% of nominal output voltage or 1 Vdc. 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 : Rd = (R2 + R1) x V0 - (R2 x V0nom) V0nom - V0
5 Vin 4 On/Off
BP Vo
6 7
MGDM150
Error amp. R1 Vref= 2.5V R2 1F
S+
3 Share 2 Sync 1 Gin
Trim 8 Rd S- 9 Go 10
Load
4
Trim via a voltage The output voltage is given by the following formula : R1 x (Vcont - 1) ) x V0nom V0 = (1 + (R1 + R2) Vref
5 Vin 4
Vo
6 7 Ru
MGDM150
On/Off
Error amp. R1 Vref= 2.5V R2 1F
S+
3 Share 2 Sync 1 Gin
Trim 8
BAT54
100nF
Load
Vcontrol
S- 9 Go 10
Parameter Trim reference Resistor R1 Resistor R2 Trim capacitor
Unit Vdc Ohm Ohm F
Min. 2,45 / / /
Typ. 2,5 3800 270 1
Max. 2,55 / / /
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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.
5 Vin 4 On/Off BP
Hi-Rel Grade
Vo 6 S+ 7 Trim 8 S- 9 Go 10
3 Share 2 Sync 1 Gin
MGDM150
Load
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 On/Off pins together. * The converter is disabled by pulling low the pin 4. * No connection or high impedance on pin 4 enables the converter. 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.
Vi 5 Vin 4 On/Off BP Vo 6 S+ 7 Trim 8 S- 9 Go 10
3 Share On/Off 2 Sync 1 Gin
MGDM150
Load
Gi
4
Notes, conditions Open, the switch must not sink more than 100A The switch must be able to sink 1mA UVLO, OVLO, OVP, OTP, faulty module The module restarts with the same delay after alarm mode removed Vi nominal, full load
Parameter On/Off module enable voltage On/Off module disable voltage On/Off alarm level On/Off module enable delay On/Off module disable delay
Unit Vdc Vdc Vdc ms s
Min. 3.5 0 0 / /
Typ. / / / / /
Max. 4 0.5 0.5 30 100
13-4 Synchronization Function
An external clock with rectangular Pull Up signals can be used to lock one or more converters. The external clock signal 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.
Vsync
4V +/- 0,5
Vi
5 Vin 4
100pF
BP
Vo 6 S+ 7 Trim 8 S- 9 Go 10
On/Off
3 Share 2 Sync
Ext. clock
Totem pole output 1N4148 4.7k
MGDM150
Load
Gi
0V 30ns max T/2 100ns max T ( 860Khz < F < 940Khz )
1
Gin
Vin
(c) Gaia Converter FC02-009.08/06 Revision N
14 For locations, phone, fax, E-Mail see back cover
MGDM-150 Low Input Series 14- Application Notes
14-1 Synchronization of Modules
10nF BP 10nF Vo 6 S+ 7 Trim 8 9 10 10nF
Hi-Rel Grade
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.
5 Vin 4 On/Off
3 Share 2 Sync 1 10nF Gin
MGDM150
SGo BP
(*)
10nF 5 4 BP Vin On/Off Vo S+
10nF 6 7
3 Share On/Off 2 Sync 1 10nF Gin
MGDM150
Trim 8 9 10 10nF
SGo BP
(*) BP: Base Plate
14-2 Connection of Modules in Series
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. Reverse polarity may occur at start up if the output voltages do not rise at the same time.
10nF 5 Vin 4 100F On/Off BP Vo S+
10nF 6 7
3 Share 2 Sync 1 10nF Gin
MGDM150
Trim 8 9 10 10nF
SGo BP
4
(*)
10nF 5 Vin 4 100F 3 Share 2 Sync 1 10nF Gin BP On/Off BP
10nF Vo 6 S+ 7 Trim 8 9 10 10nF
MGDM150
SGo
(*) BP: Base Plate
14-3 Connection of Modules in Parallel
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. The Share signal is a DC voltage which varies between 0Vdc and 5Vdc referenced to Sense - and depending on the output load.
100F
10nF 5 4 BP Vin On/Off Vo S+
10nF 6 7
3 Share 2 Sync 1 10nF Gin
MGDM150
Trim 8 9 10 10nF
SGo BP
(*)
10nF 5 Vin 4 100F 3 Share 2 Sync 1 10nF Gin BP On/Off BP
10nF Vo 6 S+ 7
MGDM150
Trim 8 9 10 10nF
SGo
(*) BP: Base Plate
(c) Gaia Converter FC02-009.08/06 Revision N
15 For locations, phone, fax, E-Mail see back cover
MGDM-150 Low Input Series 15- Dimensions
Hi-Rel Grade
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 (0.3) 7,62 (0.3) 10,16 (0.4) 7,62 (0.3)
5,08 (0.2)
0,5 (0.019)
4,826 (0.19)
9,589 (0.38)
Uncoated metal header Use this side for heat sinking
48,26 (1.90)
57,912 (2.28)
CH 2x2
50,8 (2.00) 60,95 (2.40)
5,6 min (0.22)
R2 .4 (0 ,1 )
12,7 Max (0.5) 6,8 max (0.267)
Pin dimensions : Pins : 1, 2, 3, 4, 5, 7, 8, 9 : O 1 mm (0.04") Pins : 6, 10 : O 2 mm (0.08")
Metallic case alodyned coating solder plated pin
4
16- Product marking
Side face : Company logo, module reference, option, date code : year and week of manufacturing
17- Connections
Pin
10 9 8 7 6
Single Output - Input (Gi) Synchro (Sync) Share On/Off + Input (Vi) + Output (Vo) Sense + (S+) Trim (Trim) Sense - (S-) - Output (Go)
1 2 3 4 5 6 7 8
1
2
3
4
5
9 10
Bottom view
16 For locations, phone, fax, E-Mail see back cover
(c) Gaia Converter FC02-009.08/06 Revision N
For more detailed specifications and applications information, contact :
International Headquarters GAIA Converter - France ZI de la Morandiere 33185 LE HAILLAN - FRANCE Tel. : + (33)-5-57-92-12-80 Fax : + (33)-5-57-92-12-89 North American Headquarters GAIA Converter Canada, Inc 4038 Le Corbusier Blvd LAVAL, QUEBEC - CANADA H7L 5R2 Tel. : (514)-333-3169 Fax : (514)-333-4519
Printed in France by Gaia Converter FC02-009.08/06 Revision N Graphisme : Philippe Clicq
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.

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