Hi-Rel DC/DC CONVERTER MGDM-200 : 200W POWER

Transcription

1 DCDC CONVERTER MGDM-00 : 00W POWER : Low Input ltage : 9- & -80 VDC Single Output Metallic case -.00 VDC Isolation Ultra wide input range 9- Vdc, -80 Vdc 8Vdc input compliant with MIL-STD-70ADF Power up to 00 W PRELIMINARY Wide temperature range : -0+0 C baseplate High efficiency (typ. 86%-90%) Soft start Galvanic isolation.00 VDC Integrated LC filter hronizable Load sharing, N+ redundancy No load to full load operation Fully protected by independant protection Under voltage lock-out Overvoltage protection Output current limitation Over temperature protection No optocoupler for high reliability RoHS process -General The MGDM-00 low input voltage series is a complete line of high density wide input range DCDC power modules designed for aerospace, military and high-end industrial applications. These modules use a patented fixed switching topology at 70 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-, -80 volts. The series include single output voltage choices of,,,,, volts. The MGDM-00 low input voltage series include synchronization, load sharing, trim, current trim limitation and sense functions. The synchronization function allows to synchronize one converter to the other or to an external frequency source. The load sharing allows parallel operation to increase output power with a true N+ without any additionnal external components. All modules are designed with LC network filters to minimize reflected input current ripple and output voltage ripple. The modules have independant protection functions including input undervoltage lock-out, output overvoltage protection, output current limitation, and thermal protection. Additionnally a soft-start function reduces 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 thermally conductive compound to ensure optimum power dissipation under harsh environmental conditions. -Product Selection Single output model : MGDS input output option suffix Input ltage Range Permanent H : 9- VDC O : -80 VDC Output B :. VDC C : VDC E : VDC F : VDC I : VDC Options : Suffix : H : option with side pin configuration T : option for - C start up operating temperature nothing : RoHS process S : option for screening and serialization REDEFINING THE SOURCE OF POWER

2 - Product Selection (continued) Input range Output Current Reference Options Suffix 9- VDC 9- VDC 9- VDC 9- VDC 9- VDC. VDC VDC VDC VDC VDC A A,7 A, A 8, A -H-B -H-C -H-E -H-F -H-I -80 VDC -80 VDC -80 VDC -80 VDC -80 VDC. VDC VDC VDC VDC VDC A A,7 A, A 8, A -O-B -O-C -O-E -O-F -O-I Converter Selection Chart MGDS O - C H T Number of Outputs : S : single output Input voltage range : H : 9- VDC O : -80 VDC Output voltage : See table page Option : H : pin side configuration T : - C start up operation S : screening & serialization (consult application note «screening grades») Suffix : nothing : RoHS process

3 - Electrical Specifications Data are valid at + C, unless otherwise specified. Parameter Input Conditions Limit or typical 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 0- and 0-9 for further details. Note *** : The output voltage ripple is the periodic AC component superimposed on the output voltage, an aperiodic and random component (noise) has also to be considered. This noise can be reduced by adding 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. Units Single Output 00 - H 00 - O Nominal input voltage Full temperature range Nominal VDC 8 Permanent input voltage range (Ui) Full temperature range Min. - Max. VDC Input surge withstand Full temperature range VDCsec. 600, 00 Undervoltage lock-out (UVLO) Start up time Reflected ripple current No load input power Input power in inhibit mode Output Output voltage * Set Point accuracy * Output power ** Output current **,V output V output V output V output V output Ripple output voltage ***,V and V output V output V output V output Output regulation * (Line + load + thermal) Output ltage Trim Range Efficiency Turn-on voltage Turn-off voltage Ui nominal Nominal output Full load : resistive Ui nominal, full load BW = 0MHz Ui nominal No load Ui nominal Inhibit Ui min. to max. Ambient temperature : + c Ui nominal, 7% load At 0 c baseplate Ui min. to max. Full temperature range Ui min. to max. Ui nominal Full load BW = 0MHz Ui min. to max. 0% to full load As function of output voltage Ui nominal Full load VDC VDC 9 8 ms 0 0 App,, W W Nominal Nominal Nominal Nominal Nominal VDC VDC VDC VDC VDC,, % W Typical Typical Typical Typical A A A A A mvpp mvpp mvpp mvpp,7, 8, ,7, 8, % Minimum % % Typical % 88 88

4 - Switching Frequency Parameter Switching frequency Conditions Full temperature range Ui min. to max. No load to full load Limit or typical Nominal, fixed Specifications 70 KHz - Isolation Parameter Electric strength test voltage Conditions Input to output Input to case Output to case Limit or typical Minimum Minimum Minimum Specifications.00 VDC min.00 VDC min.00 VDC min Isolation resistance 00 VDC Minimum 00 MOhm 6- Protection Functions Characteristics Protection Device Recovery Limit or typical Specifications Input undervoltage lock-out (UVLO) Output current limitation (OCP) Output short circuit protection (SCP) Output overvoltage protection (OVP) Over temperature protection (OTP) Turn-on, turn-off circuit with hysteresis cycle Foldback current limitation Hiccup circuitry with auto-recovery Overvoltage protection device with latch-up Thermostat with hysteresis cycle Automatic recovery Automatic recovery Automatic recovery Automatic recovery Automatic recovery Turn-on nominal Turn-off nominal See section 0% of output current Permanent See section Typical % to % of output voltage 0 C internal 7- Reliability Data Characteristics Conditions Temperature Specifications Mean Time Between Failure (MTBF) According to MIL-HDBK-7F Mean Time Between Failure (MTBF) According to IEC-680-TR Ground fixed (Gf) Airborne, Inhabited, Cargo (AIC) Avionics Military Cargo Case at 0 C Case at 8 C Case at 0 C Case at 8 C Consult factory

5 8- Electromagnetic Interference Electromagnetic Interference requirements according to MIL-STD-6CDE standards can be achieved as indicated in the following section. The following table resumes the different sections covered by these standards. Standard Requirements MIL-STD-6C Standard MIL-STD-6DE Standard Compliance with GAIA Converter Module & common mode capacitance Conducted emission (CE) : Low frequency High frequency CE 0 CE 0 CE 0 CE 0 compliant module stand-alone compliant with additionnal filter Conducted susceptibility (CS) : Low frequency High frequency CS 0 CS 0 CS 0 CS compliant with additionnal filter compliant with additionnal filter Radiated emission (RE) : Magnetic field Electrical field RE 0 RE 0 RE 0 RE 0 compliant with additionnal filter compliant with additionnal filter Radiated susceptibility (RS) : Magnetic field Electrical field RS 0 RS 0 RS 0 RS 0 compliant with additionnal filter compliant with additionnal filter Applicability H, O input module H, O input module see EMI datasheet 8- Module Compliance with MIL-STD-6 Standards To meet the latest US military standards MIL-STD-6 requirements and in particular the conducted noise emission CE0 and CE0 requirements, Gaïa Converter can propose a stand-alone ready-to-use EMI filter module solution together with a RC cell (see filter module datasheet) and a LC cell (L=µH, C=0µFmin. Ceramic capacitor) and external decoupling capacitance Cc (rated voltage depending on isolation requirement) connected between input and case and output and case. EMI input filter : See detailed configuration as per datasheet FGD0A-0V VI LC cell Cc VI Cc EMI input Filter R C MGDM-series GI Go Cc GI Go Cc : Base Plate

6 9- Thermal Characteristics Characteristics Conditions Limit or typical Performances Operating ambient temperature range at full load Ambient temperature * Minimum - 0 C see section below Frame operating temperature Frame temperature Minimum - 0 C + 0 C Note * : The upper temperature range depends on configuration, the user must ensure a max. baseplate temperature of + 0 C. The MGDM-00 low input series maximum frame temperature at full load must not exceed 0 C. Heat can be removed from the module via three basic mechanisms : Radiation transfer : radiation is counting for less than % of total heat transfer in most cases, for this reason the presence of radiant cooling is used as a safety margin and is not considered. Conduction transfer : in most applications, heat will be drained from the casing into an attached heatsink or heat conducting member; heat is conducted through the interface. Convection transfer : convecting heat transfer into air refers to still air or forced air cooling. In majority of the applications, heat will be removed from the module either with : heatsink, forced air cooling, both heatsink and forced air cooling. The MGDM-00 series has been designed in such a manner that cooling is achieved by conduction transfer using defined interface areas on the top andor lateral sides of the casing. These areas are shown in the following figure. Lateral side interface areas Top side interface areas 6

7 9- Thermal Characteristics (continued) Heat must be conducted from the frame into an attached heat sink or heat conducting member through either the top side interface areas, or either one or both of the lateral side interface areas. Thermal compound or a thermal pad should be used to fill surface irregularities of these areas. It is recommended that the thermal compound or a thermal pad be placed only over the shaded areas and not cover the potted area when top interface areas are used to cool the converter as shown by the following figure. AÏA CONVERTER AÏA CONVERTER To calculate a maximum admissible ambient temperature the following method can be used. Knowing the maximum baseplate temperature of the module T case =0 C, the power used Pout, and the efficiency η : determine the power dissipated by the module Pdiss : P DISS P OUT determine the maximum ambient temperature : Ta 0 Rth F A P DISS where RthF-A is the thermal resistance from the frame to ambient. This thermal resistance RthF-A is the sum of : the thermal resistance of frame to heatsink (RthF-H). The interface between frame and heatsink should be a thermally conductive part such as a thermal compound or a thermal pad... The value of RthF-H can range from 0. CW for no interface down to 0. CW for a thermal conductive part. the thermal resistance of heatsink to ambient air (RthH-A), which is depending of air flow and given by heatsink supplier. Rth F A Rth F H Rth H A 7

8 0- Environmental Qualifications The modules have been subjected to the following environmental qualifications. Characteristics Conditions Severity Test procedure Climatic Qualifications Life at high temperature Altitude Humidity cyclic Humidity steady Salt atmosphere Temperature cycling Temperature shock Duration Temperature status of unit Altitude level C Duration Climb up Stabilization Number of cycle Cycle duration Relative humidity variation Temperature variation Damp heat Temperature Duration Temperature Concentration NaCl Duration Number of cycles Temperature change Transfert time Steady state time Number of shocks Temperature change Transfert time Steady state time Test D :.000 C ambient, unit not operating ft@- C 0 min..000 ftmin to f@- C, 0 min. unit operating 0 Cycle I : Hrs 60 % to 88 % C to C unit not operating 9 % relative humidity 0 C 6 days unit not operating C % 8 Hrs unit not operating 00-0 C +8 C 0 min. 0 min. unit operating 00 - C +0 C 0 sec. 0 min. unit not operating MIL-STD-0G Method 08A MIL-STD-80G Method 00. MIL-STD-80G Method 07. MIL-STD-0G Method 0B MIL-STD-80G Method 09. MIL-STD-0A Method 0A MIL-STD-0G Method 07G Mechanical Qualifications Vibration (Sinusoidal) Shock (Half sinus) Bump (Half sinus) Number of cycles Frequency amplitude Frequency acceleration Duration Number of shocks Peak acceleration Duration Shock form Number of bumps Peak acceleration Duration 0 cycles in each axis 0 to 60 Hz 0.7 mm 60 to 000 Hz 0 g h 0 min. per axis unit not operating shocks in each axis 00 g 6 ms sinusoidal unit not operating 000 Bumps in each axis 0 g 6 ms unit not operating MIL-STD-80G Method.6 MIL-STD-80G Method.6 MIL-STD-80G Method.6 8

9 - Description of Protections The MGDM-00 low input series include types of protections. - Input Undervoltage Lockout (UVLO) An undervoltage protection is implemented to switch off the converter as long as the input voltage has not reached the UVLO turn-on threshold (see section for value) which is the minimum input voltage required to operate without damaging the converter. On Off UVLO UVLO Turn-off Turn-on - Output Over Current Protection (OCP) ut The MGDM-00 low input series incorporates a foldback current limit and protection circuit. When the output current reaches % of its full-rated current, the output voltage drops and output current drops along the foldback line as described in the figure herein. The module automatically resumes normal operation when the overcurrent is removed. The current limit can be set by using the function. For more details please see section. Icurrent limit Iout % of full Rated current % of full Rated current - 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 % to % of nominal output voltage. Once in OVP protection, the module will restart automatically when the overvoltage is removed. - Over Temperature Protection (OTP) A thermal protection device adjusted at 0 C (+-%) internal temperature with 0 C hysteresis cycle will inhibit the module as long as the overheat is present and will restore to normal operation automatically once the overheat is removed. The effectiveness of the OTP function is warranty with the module mounted on a heatsink. On Off 0 c 0 c Internal Temperature 9

10 - Description of Functions - Trim Function The output voltage may be trimmed in a range of 0% to 0% of the nominal output voltage via an external trimmer or a fixed resistor. Trim Up Function Do not trim the module above 0% of nominal output voltage as the overvoltage protection will trigger. Also do not exceed the maximum rated output power when the module is trimmed up. The trim up resistor must be connected to the pin. The trim up resistor must be calculated with the following formula : 8, 9 0, Trim 7 Ru Load Ru R Vref nom nom Vref R R 6, 7 Gin Go, Trim Down Function Do not trim down below 0% of nominal output voltage or 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 pin. The trim down resistor must be calculated with the following formula : 8, 9 0, Trim 7 Rd Load Rd R R R nom nom 6, 7 Gin Go, Trim via a voltage The output voltage is given by the following formula : R R R Vcont Vref nom 8, 9 0, Trim 7 Ru BAT 00nF Vcontrol 6, 7 Gin Go, Trim resistor values calculated automatically: On-line calculators for trim resistor values are available on the Gaia converter website at : Parameter Unit Min. Typ. Max. Trim reference Vref Vdc,,, Resistor R Ohm 9K Resistor R Ohm 70 0

11 - Description of Functions (continued) - Sense Function (Sense) If the load is separated from the output by any line lenght, some of the 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 +-0% of output voltage. The overvoltage protection will be activated and the module will shut down if the remote sense tries to boost the output voltage above 0% of nominal output voltage. Connections are described in figure herein. 8, 9 0, V OnOff Trim 7 Share Gin 6, 7 Go, Load - OnOff Function (OnOff) The OnOff control pin can be used for applications requiring OnOff 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 onoff pins together. The converter is disabled by pulling low the OnOff pin. No connection or high impedance on the OnOff pin enables the converter. By releasing the OnOff function, the converter will restart within the start up time specifications given in table section. For further details please consult Logic OnOff application note. Vi OnOff Gi 8, 9 0, V OnOff Trim 7 Share Gin 6, 7 Go, Load Parameter Unit Min. Typ. Max. Notes, conditions OnOff module enable voltage Vdc. Open, the switch must not sink more than 00µA OnOff module disable voltage Vdc 0 0. The switch must be able to sink ma OnOff alarm level Vdc 0 0. OTP, faulty module OnOff module enable delay ms 0 The module restarts with the same delay after alarm mode removed OnOff module disable delay µs 00 Vi nominal, full load - hronization Function () The SYNC pin allows the synchronization of a module to an external frequency source or to another MGDS00 module. The pin is bidirectionnal and must be driven by an open drain, positive active low square wave signal with a frequency ranging between 8kHz to 0kHz. The characteristics of the signal are detailed in the table hereunder. Refer to Application Notes section for further information on multiple modules synchronisation. (tr, tf < 0ns; 00ns < Tp< 00ns) V Vi Ext. clock Vsync 8, 9 0, Trim 7 Share Vsync_High Gi Gin 6, 7 Go, Vth Tp Vsync_Low tr tf Tsync

12 - Description of Functions (continued) - Input Current Ripple Reduction Function () The pin is a direct access to the capacitor of the LC input filter and allows to increase the C value to enhance the converter s stability and performance and to reduce the input current ripple for improved EMI performance. It is recommended to provide for at least 0uFlow ESR ceramic capacitors. These capacitors should have the proper voltage rating and should be connected between and Gin as close as possible from the converter, using large copper traces. Gin -6 Small Signal Ground (GIA) The GIA pin is connected to the primary small signal ground to provide a clean grounding reference to interface sensitive external circuitry with the converter. To prevent noise from perturbating the converter, this pin should not be connected to the input power ground Gi. If for design reasons GIA and Gi have to be connected, it should be done through a 0R resistor. For the same reason, GIA should not be connected to any noisy circuits nor be used to carry high currents. OnOff GIA 0Ω Gin -7 Small Signal Vdc ltage (Vdc) The V pin provides a stable voltage referenced to GIA that can source up to ma to supply external circuitry. It is recommended to bypass the V to GIA with a 00nF ceramic capacitor if it is used. Parameter Unit Min. Typ. Max. Notes, conditions Output voltage Vdc.. From no load to full load Output impedance Ohm 7 Output current ma Source -8 Output Current Limitation Trim () 8, 9 0, The ITRIM pin allows to trim down the output current threshold at which the current limitation protection will trigger with a resistor connected between ITRIM and. The pin must not be trimmed up. The formula hereunder allows to determine the resistor value Rd for a given output current threshold. 900 Rd. Io nom Io limit 6, 7 Gin Go, Rd Load

13 - Application Notes - hronization of Modules The MGDM-00 low input series provides a synchronization function through the hro pin to enable automatic synchronisation between several converters. If several converters are used, they lock themselves at the highest switching frequency. 8, 9 0, V OnOff Trim 7 Share Gin 6, 7 Go, (*) 8, 9 0, V OnOff Trim 7 Share Gin 6, 7 Go, - 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. GAIA Converter recommends to protect each individual output with a 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 are not synchronous. Special care must be taken to layout properly low level signals. and OnOff from high current tracks. They must be shielded with GIA signal to avoid any disturbances by noises and crosstalk. 00µF 8, 9 : Base 0, Plate V OnOff Trim 7 Share 6, 7 Gin Go, (*) 8, 9 0, 00µF V OnOff Trim 7 Share Gin 6, 7 Go, - Connection of Modules in Parallel (*) : Base Plate The MGDM-00 low input series features a «parallel operation function» to increase the output power capability of a single unit by connecting the outputs of or more converters in parallel. By connecting the «Share» pin with each other, the units will share the load current equally within a few percent. Up to converters can be parallelized. The «Share» signal is a DC voltage referenced to «Sense-» which varies between 0Vdc and Vdc depending on the output load. Modules can share the output power even if they are connected to different input buses. Sense+ and Share tracks must be shielded with Sense- to avoid any disturbances by noise and crosstalk. 00µF 00µF 8, 9 0, V OnOff Trim 7 Share Gin 6, 7 Go, (*) 8, 9 0, V OnOff Trim 7 Share Gin 6, 7 Go, (*) : Base Plate

14 - Dimensions Dimensions are given in mm (inches). Tolerance : +- 0, mm ( ) unless otherwise indicated. Weight : 8 grams ( Ozs) max. - Basic Version - Option H with Pin Configuration on Side

15 - Materials Frame : Aluminium alodined coating. Pins : Plated with pure matte tin over nickel underplate. - Product Marking Side face : Company logo, location of manufacturing. : Module reference : MGDx-00-»X»-»Y». Date code : year and week of manufacturing, suffix, option. 7- Connections Basic Version Bottom view Option H Pin on Side Pin Single Output hro () OnOff Vdc GIA 6,7 - Input (Gi) 8,9 + Input (Vi) 0, + Output (), - Output (Go) Share Sense + () 7 Trim (Trim) Sense - ()

16 For more detailed specifications and applications information, contact : International Headquarters GAÏA Converter - France ZI de la Morandière LE HAILLAN - FRANCE Tel. : + () Fax : + () Represented by : North American Headquarters GAÏA Converter Canada, Inc 08 Le Corbusier Blvd LAVAL, QUEBEC - CANADA H7L R Tel. : ()--9 Fax : ()--9 Printed in France by Gaia Converter FC Revision A Graphisme : Philippe Clicq 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.