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| FEATURES * * * * * * * * * * -55 to +125C operation 16 to 40 VDC input Fully isolated Optocoupler feedback Fixed frequency, 550 kHz typical (400 kHz typ. 60 V output model) Topology - Flyback 50 V for up to 50 ms transient protection Inhibit function Indefinite short circuit protection Up to 76% efficiency, 16 W/in3 Size (max.): Weight: Screening: DC/DC CONVERTERS 28 VOLT INPUT MSA SERIES 5 WATT MODELS VDC OUTPUT SINGLE 5 5.2 12 15 60 DUAL 5 12 15 1.075 x 1.075 x 0.270 inches (27.31 x 27.31 x 6.86 mm) 15 grams maximum. Standard, ES, or 883 (Class H). DESCRIPTION The MSA SeriesTM of high frequency DC/DC converters offers a new standard of performance for low power, military/aerospace grade DC/DC converters. MSA parts provide up to 5 watts output power over the full military temperature range with up to 76% efficiency. Thick-film hybrid techniques provide military/aerospace reliability levels and optimum miniaturization. The hermetically sealed case is only 1.075 by 1.075 inches -- with a height of only 0.270 inches. Power density for the MSA Series parts is 16 watts per cubic inch. The MSA Series' small size, low height, and hermetically sealed metal enclosures make them ideal for use in military, aerospace and other high reliability applications. Units are available with standard, screening, "ES", and fully compliant SMD "883" screening. See page 8 for screening options and descriptions. WIDE VOLTAGE RANGE The MSA converters are designed to provide full power operation over a full 16 to 40 VDC voltage range. Operation below 16 volts, including MIL-STD-704E emergency power conditions is possible with derated power. Please refer to the low line dropout graphs (Figures 17 and 18) for details. A low voltage lockout feature keeps the converter shutdown below approximately 13 VDC to ensure smooth initialization. IMPROVED DYNAMIC RESPONSE The MSA feed-forward compensation system provides excellent dynamic response and noise rejection. Audio rejection is typically 50 dB. The minimum to maximum step line transient response is typically less than 1%. INHIBIT FUNCTION MSA converters provide a TTL open collector-compatible inhibit feature that can be used to disable internal switching and inhibit the unit's output. Inhibiting in this manner results in low standby current, and no generation of switching noise. The converter is inhibited when the TTL compatible low (0.8 V) is applied to the inhibit pin. The unit is enabled when the pin, which is internally connected to a pull-up resistor, is left unconnected or is connected to an open collector gate. The open circuit output voltage associated with the inhibit pin is 9 to 11 V. In the inhibit mode, a maximum of 4 mA must be sunk from the inhibit pin. CONVERTER DESIGN The MSA converters are switching regulators that use a flyback converter design with a constant switching frequency of 550 kHz. They are regulated, isolated units using a pulse width modulated topology and built as high reliability thick-film hybrids. Isolation between input and output circuits is provided with a transformer in the forward power path and an optical link in the feedback control loop. Excellent input line transient response and audio rejection is achieved by an advanced feed-forward compensation technique. Negative output regulation is maintained by tightly coupled magnetics. Up to 4 watts, 80% of the total output power, is available from either output, provided that the opposite output is simultaneously carrying 20% of the total power. Each output must carry a minimum of 20% of the total output power in order to maintain specified regulation on the negative output. Predictable current limit is accomplished by direct monitoring of the output load current, which results in a constant current output above the overload point. Internal input and output filters eliminate the need for external capacitors. UNDERVOLTAGE LOCKOUT AND TRANSIENT PROTECTION Undervoltage lockout helps keep system current levels low during initialization or re-start operations. They can withstand short term transients of up to 50 volts without damage. 1 MSA SERIES 5 WATT ABSOLUTE MAXIMUM RATINGS Input Voltage * 16 to 40 V Output Power * 5 watts Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -65C to +135C DC/DC CONVERTERS INHIBIT Inhibit TTL Open Collector * Logic low (output disabled) Logic low voltage 0.8 V max Inhibit pin current 4 mA max * Referenced to input common * Logic high (output enabled) Open collector TYPICAL CHARACTERISTICS Output Voltage Temperature Coefficient * 100 ppm/C typical Input to Output Capacitance * 50 pF typical Isolation * 100 megohm minimum at 500 V Audio Rejection * 50 dB typical Conversion Frequency * 550 kHz typical (400 kHz 60 V model) 450 kHz min, 600 kHz max 350 kHz min, 450 kHz max 60 V model Inhibit Pin Voltage (unit enabled) * 9 to 11 V RECOMMENDED OPERATING CONDITIONS Input Voltage Range * 16 to 40 VDC continuous * 50 V for up to 50 msec transient Case Operating Temperature (Tc) * -55C to +125C full power * -55C to +135C absolute Derating Output Power/Current (Tc) * Linearly from 100% at 125C to 0% at 135C Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified. SINGLE OUTPUT MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE Tc = -55C TO +125C OUTPUT CURRENT Tc = -55C TO +125C VIN = 16 TO 40 VDC OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT Tc = -55C TO +125C INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT3, 4 SHORT CIRCUIT STEP LOAD RESPONSE4, 5 STEP LINE RESPONSE4, 5 VIN = 16 TO 40 VDC Tc = -55C TO +125C 10 kHz - 2 MHz VIN = 16 TO 40 VDC Tc = -55C TO +125C NO LOAD TO FULL Tc = -55C TO +125C Tc = -55C TO +125C CONTINUOUS TRANSIENT 50 ms NO LOAD FULL LOAD INHIBITED 10 kHz - 10 MHz Tc = -55C TO +125C POWER DISSIPATION RECOVERY 50% - 100% - 50% TRANSIENT RECOVERY TRANSIENT 16 TO 40 VIN 40 TO 16 VIN RECOVERY 16 TO 40 VIN START-UP 40 TO 16 VIN DELAY OVERSHOOT -- -- -- -- 100 200 10 0 250 500 25 50 -- -- -- -- 100 200 10 0 250 500 25 50 -- -- -- -- 250 250 3 0 625 625 10 120 -- -- -- -- 250 250 3 0 625 625 10 150 -- -- -- -- -- -- -- -- -- -- -- -- s ms mV pk -- -- -- -- 16 0 -- -- -- -- -- 66 -- -- -- -- -- -- -- 125 10 10 28 -- 27 250 3 25 30 71 1.5 12.5 100 100 50 50 5 350 502 50 40 50 40 -- 5 100 150 -- 2.0 25 250 250 150 150 -- -- -- -- 16 0 -- -- -- -- -- 66 -- -- -- -- -- -- -- 110 10 10 28 -- 28 250 3 25 30 71 1.5 1.5 100 100 50 50 5 335 50 50 40 50 40 -- 5 100 150 -- 2.0 25 250 250 150 150 -- -- -- -- 16 0 -- -- -- -- -- 70 -- -- -- -- -- -- -- 50 10 10 28 -- 29 235 3 25 30 76 1.2 1 150 200 80 100 5 200 50 50 40 50 42 -- 5 100 150 -- 1.9 10 375 500 200 250 -- -- -- -- 16 0 -- -- -- -- -- 71 -- -- -- -- -- -- -- 50 10 10 28 -- 31 235 3 25 30 76 1.2 1 200 200 50 50 5 170 50 50 40 50 44 -- 5 100 150 -- 1.8 10 500 500 125 125 -- -- -- -- 16 0 -- -- -- -- -- 70 -- -- -- -- -- -- -- -- -- -- 28 -- -- 72 3 -- -- 75 -- -- -- -- -- -- 1.2 300 300 300 40 50 30 -- 5 90 -- -- -- -- -- -- -- -- W mV p-p mV mV VDC V mA MSA2805S MSA285R2S MSA2812S MSA2815S MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 4.95 5.00 5.05 5.15 5.20 5.25 11.88 12.00 12.12 14.85 15.00 15.15 0 -- 1000 0 -- 962 0 -- 417 0 -- 333 MSA2860S1 MIN TYP MAX 59.1 60.00 60.9 0 -- 20 UNITS VDC mA mA p-p % W ms mV pk s mV pk Notes 1. MSA2860S specifications are at 25Tc only, contact your Interpoint representative for more information on over temperature specs. 2. Line regulation for /ES and non /ES 2805S models at 16 to 17 VIN and 110 C to 125C (case) is 5% (max). 3. Indefinite short circuit protection not guaranteed above 125C (case). 4. Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value. 5. Transition time >10s. 2 DC/DC CONVERTERS DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT1 OUTPUT POWER1 OUTPUT RIPPLE VOLT. LINE REGULATION Vin = 16 to 40 VDC CONDITIONS +VOUT -VOUT VIN = 16 to 40 VDC Tc = -55C to +125C VIN = 16 to 40 VDC Tc = -55C to +125C 10 kHz - 2 MHz Tc = -55C to +125C +VOUT -VOUT LOAD REGULATION NO LOAD TO FULL Tc = -55C to +125C +VOUT -VOUT CROSS REGULATION2 +PO = 20 - 80 %, -PO = 80 - 20% -PO = 20 - 80 %, +PO = 80 - 20% +PO = 50 - 10 %, -PO = 50% -PO = 50 - 10 %, +PO = 50% INPUT VOLTAGE Tc = -55C to +125 INPUT CURRENT Tc = -55C to +125C INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT3, 4 NO LOAD TO FULL CONTINUOUS TRANSIENT 50 msec NO LOAD FULL LOAD INHIBITED 10 kHz TO 10 MHz Tc = -55C to +125C POWER DISSIPATION SHORT CIRCUIT RECOVERY 50% - 100% - 50% BALANCED TRANSIENT RECOVERY STEP LINE RESP.4, 5 16 TO 40 TRANSIENT 40 TO 16 16 TO 40 RECOVERY 40 TO 16 DELAY OVERSHOOT VDC VDC VDC VDC MIN 4.95 4.9 -- -- -- -- -- -- -- -- MSA 2805D TYP 5.00 5.0 500 -- -- 10 40 10 50 10 MAX 5.05 5.1 800 5 150 25 75 50 200 20 MSA2812D MIN 11.88 11.76 -- -- -- -- -- -- -- -- TYP 12.00 12.00 208 -- 40 10 40 10 50 8 MAX 12.12 12.24 333 5 140 50 180 50 200 15 MIN 14.85 14.70 -- -- -- -- -- -- -- -- TYP MSA SERIES 5 WATT MSA2815D MAX 15.15 15.30 267 5 150 50 180 50 200 15 % mA W mV p-p UNITS VDC Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified. 15.00 15.00 167 -- 60 10 40 10 50 7 mV mV -- 5 8 -- 3.7 6 -- 3 6 16 -- -- -- -- -- -- 68 -- -- -- -- -- -- -- -- -- -- 28 -- 30 248 3 25 30 72 1.3 -- -- -- -- -- -- -- -- -- 40 50 35 -- 5 80 160 -- 1.8 50 150 100 750 500 1200 1200 25 500 16 -- -- -- -- -- -- 69 -- -- -- -- -- -- -- -- -- -- 28 -- 33 235 3 25 30 75 1.3 1 300 200 50 50 150 400 3 0 40 50 58 -- 5 100 150 -- 1.7 10 750 500 125 125 375 1000 10 120 16 -- -- -- -- -- -- 70 -- -- -- -- -- -- -- -- -- -- 28 -- 38 235 3 25 30 75 1.3 1 300 500 150 100 250 800 3 0 40 50 60 -- 5 100 150 -- 1.6 10 750 1250 375 250 625 2000 10 150 VDC V mA mA p-p % W ms mV s mV pk s ms mV pk STEP LOAD RESPONSE4, 5 START-UP Notes 1. Up to 4 watts (80% of full power) is available from either output providing the opposite output is carrying 20% of total power. 2. Shows regulation effect on the minus output during the defined cross loading conditions. See Figures 15 and 16. 3. Indefinite short circuit protection not guaranteed above 125C (case). 4. Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value. 5. Transition time >10s. 3 MSA SERIES 5 WATT DC/DC CONVERTERS PIN OUT Pin 1 2 3 4 5 6 7 8 Single Output Positive Output Output Common No connection No connection Inhibit Positive Input Input Common Case Ground Dual Output Positive Output Output Common Negative Output No connection Inhibit Positive Input Input Common Case Ground Squared corner and dot on top of package indicate pin one. 1 2 3 4 5 BOTTOM VIEW MSA 8 7 6 See page 7 for dimensions. FIGURE 1: PIN OUT BOTTOM VIEW SMD NUMBERS MODEL NUMBERING KEY MSA Base Model Input Voltage Output Voltage (R = decimal point, 5R2 = 5.2 Vout) Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) 28 12 D / 883 STANDARD MICROCIRCUIT DRAWING (SMD) 5962-9309201HXC IN PROCESS 5962-9309301HXC 5962-9309401HXC 5962-0052201HXC 5962-9308901HXC 5962-9309001HXC MSA SERIES SIMILAR PART MSA2805S/883 MSA285R2S/883 MSA2812S/883 MSA2815S/883 MSA2860S/883 MSA2812D/883 MSA2815D/883 For exact specifications for an SMD product, refer to the SMD drawing. Call your Interpoint representative for status on MSA SMD releases. "883" suffix indicates SMD similar part. SMDs can be downloaded from: http://www.dscc.dla.mil/programs/smcr 4 DC/DC CONVERTERS 80 16V 70 70 80 16V 70 80 16V MSA SERIES 5 WATT Typical Performance Curves: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified. EFFICIENCY (%) EFFICIENCY (%) 60 28V 40V 60 28V 40V EFFICIENCY (%) 60 28V 40V 50 50 50 40 40 40 30 1 2 3 4 5 6 30 30 1 2 3 4 5 6 1 2 3 4 5 6 OUTPUT POWER (Watts) MSA2805S EFFICIENCY OUTPUT POWER (Watts) OUTPUT POWER (Watts) MSA2812S EFFICIENCY MSA2815S EFFICIENCY FIGURE 2 80 FIGURE 3 FIGURE 4 70 10 ATTENUATION (dB) 20 30 40 50 60 70 80 90 20V/div. 1 10 100 16V EFFICIENCY (%) VIN 60 28V 50 40V 30 1 2 3 4 5 6 100 0.1 20mV/div. 40 VOUT OUTPUT POWER (Watts) FREQUENCY (kHz) 100s/div 16V TO 40V MSA2815D EFFICIENCY MSA SERIES AUDIO REJECTION MSA2805S STEP LINE RESPONSE FIGURE 5 FIGURE 6 FIGURE 7 100% to 50% 100% to 10% 20V/div. 1V/div. VIN 50mV/div. 50mV/div. 50% to 100% 10% to 100% VOUT 100s/div 50% 100% 100s/div 10% 100% 1 ms / div MSA2805S TURN-ON INTO NO LOAD MSA2805S STEP LOAD RESPONSE MSA2805S STEP LOAD RESPONSE FIGURE 8 FIGURE 9 FIGURE 10 20V/div. 50% to 10% VIN -POUT=2.5W 90% to 10% -POUT=0.5W 100mV/div. 100mV/div. +VOUT -VOUT 10% to 50% 200mV/div. 10% to 90% 200s/div 16V TO 40V 100s/div 10% 50%) 200s/div 10% 90% MSA2815D INPUT STEP LINE RESPONSE MSA2815D +VO STEP LOAD RESPONSE MSA2815D +VO STEP LOAD RESPONSE FIGURE 11 FIGURE 12 FIGURE 13 5 MSA SERIES 5 WATT DC/DC CONVERTERS Typical Performance Curves: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified. 10 5 -VOUT VOLTAGE CHANGE (%) -VOUT VOLTAGE CHANGE (%) 8 6 4 2 0 -2 -4 -6 -8 -10 90/10 70/30 50/50 30/70 10/90 2815D 2812D 4 3 2 COND A 1 0 -1 -2 -3 -4 -5 10 20 30 40 50 2812D COND B 2815D 2812D 20V/div. 5V/div. VIN +VOUT -VOUT 500s/div MSA2815D TURN-ON INTO NO LOAD OUTPUT LOAD (+VOUT % / -VOUT %) 90-10% LOAD on +V, 10-90% LOAD on -V MSA DUAL CROSS REGULATION OUTPUT LOAD (%) COND. A: 50% LOAD +V; 10% to 50% -V COND. B: 50% LOAD -V; 10% to 50% +V MSA DUAL CROSS REGULATION FIGURE 14 FIGURE 15 FIGURE 16 17 17 MSA2805S INPUT VOLTAGE (Volts) 15 MSA2812S 14 INPUT VOLTAGE (Volts) 16 16 MSA2815D 15 14 13 MSA2815S 12 13 MSA2812D 12 1 2 3 4 5 6 1 2 3 4 5 6 OUTPUT POWER (Watts) 50 mV DROP OUTPUT POWER (Watts) 50 mV DROP LOW LINE DROPOUT VS. LOAD LOW LINE DROPOUT VS. LOAD FIGURE 17 FIGURE 18 6 DC/DC CONVERTERS Dot on top of case indicates pin one Materials Header Cold Rolled Steel/Nickel/Gold Cover Cold Rolled Steel/Nickel Pins Copper/Nickel/Gold compression glass seal 1.075 max (27.31) Case dimensions in inches (mm) Tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified CAUTION Heat from reflow or wave soldering may damage the device. Solder pins individually with heat application not exceeding 300C for 10 seconds per pin. MSA SERIES 5 WATT CASE C BOTTOM VIEW See Figure 20 for pin configurations. 1.075 max (27.31) FIGURE 19: CASE C MAXIMUM DIMENSIONS BOTTOM VIEW CASE C1 MSA Series: Screening - Standard, ES, or 883 Seam Seal Projection Weld 0.932 (23.67) 0.025 (0.64) dia. Squared corner and dot on top of case indicate pin one. 1 2 3 4 5 0.132 (3.35) 0.000 0.000 0.270 max. (6.86) 0.205 0.010 (5.21 0.25) 0.000 0.205 0.010 (5.21 0.25) 0.270 max. (6.86) 0.000 8 7 6 0.132 (3.35) 0.332 (8.43) 0.532 (13.51) 0.732 (18.59) FIGURE 20: CASE C1 Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer to the numerical dimensions for accuracy. 0.932 (23.67) 7 MSA SERIES 5 WATT TEST (125C Products) PRE-CAP INSPECTION Method 2017, 2032 DC/DC CONVERTERS ENVIRONMENTAL SCREENING STANDARD /ES /883 (Class H)* yes yes yes TEMPERATURE CYCLE (10 times) Method 1010, Cond. C, -65C to 150C Method 1010, Cond. B, -55C to 125C CONSTANT ACCELERATION Method 2001, 3000 g Method 2001, 500 g BURN-IN Method 1015, 160 hours at 125C 96 hours at 125C case (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55C, +25C, +125C Subgroups 1 and 4: +25C case HERMETICITY TESTING Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) FINAL VISUAL INSPECTION Method 2009 no no no yes yes no no no no yes yes no no no no yes yes no no yes no yes yes no no no yes yes yes no yes yes no yes yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of -55C to +125C. Contact Information: Interpoint Headquarters USA Phone: 1-800-822-8782 +425-882-3100 Email: power@intp.com www.interpoint.com Interpoint UK Phone: +44-1252-815511 Email: poweruk@intp.com Interpoint France Phone: +33-134285455 Email: powerfr@intp.com 8 22021-001-DTS Rev C This revision supercedes all previous releases. All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice. MSA Series is a trademark of Interpoint. Copyright (c) 1994 - 2001 Interpoint Corporation. All rights reserved. |
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