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| FEATURES * * * * * * * -55C to +125C operation 12 to 50 VDC input Fully isolated Magnetic feedback Fixed frequency 370 kHz typ. Topology - Current Mode Flyback 80 V for up to 120 ms transient protection (70 V for 15 V single and dual models) * Inhibit function * Short circuit protection * Undervoltage lockout DC/DC CONVERTERS 28 VOLT INPUT MCH SERIES 1.5 WATT MODELS VDC OUTPUT SINGLES 5 5.2 12 15 DUALS 5 12 15 Size (max.): 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm) Weight: 12 grams max. Screening: Standard, ES, or 883 (Class H) DESCRIPTION With a miniature footprint of just 0.8 square inches, the MCH SeriesTM of DC/DC converters delivers 1.5 watts of output power while saving significant board real estate. The wide input voltage range of 12 to 50 VDC accepts the varying voltages of military, aerospace, or space bus power and tightly regulates output voltages to protect downstream components. Transient protection of 80 volts for up to 120 milliseconds exceeds the requirements of MIL-STD-704A for the 5, 5.2, and 12 volt single models and the 12 volt dual model. The 15 volt single and dual converters will withstand transients of up to 70 volts for up to 120 milliseconds. INHIBIT FUNCTION When an open collector TTL logic low is applied to the inhibit terminal, pin 7, the converter shuts down and lowers the output voltage to near zero and input current to as low as 2.3 mA. Leaving the terminal open or applying an open collector TTL logic high will enable the converter. PROTECTION FEATURES Undervoltage lockout prevents the MCH Series converters from operating below approximately 8 VDC input voltage to keep system current levels smooth, especially during initialization or re-start operations. All models include a soft-start function to prevent large current draw and minimize overshoot. The converters also provide short circuit protection by restricting the current. CONVERTER DESIGN MCH Series DC/DC converters incorporate a continuous flyback topology with a constant switching frequency of approximately 370 kHz. Current-mode pulse width modulation (PWM) provides output voltage regulation. Output error voltage is magnetically fed back to the input side of the PWM to regulate output voltage. Regulation is also affected by the load; refer to the Electrical Characteristics tables on the following pages. Dual models regulate the negative output with magnetic coupling to the positive output. Up to 80% of the total load may be on one output providing that the other output carries a minimum of 20% of the total load. The dual models can be used at double the output voltage by connecting the load between positive and negative outputs, leaving the common unconnected. (ex: MCH2805D can be used as a 10 VDC output.) POSITIVE 1 INPUT MIL-STD-461 Use Interpoint's FMSA-461 EMI filter to pass the CE03 requirements of MIL-STD-461C. CONVENIENT PACKAGING The MCH Series converters are packaged in hermetically sealed, projection-welded metal cases which provide EMI/RFI shielding. + 0.47 F typical +VIN FB + 3 POSITIVE OUTPUT INHIBIT 7 SHUTDOWN PWM CONTROLLER +VOUT + 4 OUTPUT COMMON 6 NEGATIVE OUTPUT DUAL MODELS ONLY INPUT COMMON 2 FIGURE 1: BLOCK DIAGRAM 1 MCH SERIES 1.5 WATT ABSOLUTE MAXIMUM RATINGS Input Voltage * 12 to 50 VDC Output Power * 1.5 W Capacitive Load * Single output models 200 F * Dual output models 100 F Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -65C to +150C DC/DC CONVERTERS INHIBIT Inhibit - TTL Open Collector * Logic low (output disabled) 0.8 V max Inhibit pin current 1 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 * 100 to 170 pF typical Undervoltage Lockout * 8 V input typical Current Limit * 125% of full load typical Isolation * 100 megohm minimum at 500 V Audio Rejection 40 dB, typical Conversion Frequency (kHz) * 25C, 300 min, 370 typ, 450 max * -55C to +125C 270 min, 370 typ, 470 max Inhibit Pin Voltage (unit enabled) * 7 to 12 V RECOMMENDED OPERATING CONDITIONS Input Voltage Range * 12 to 50 VDC continuous * 80 V for 120 msec transient (70 V for 15 V single and dual models) 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 VOLTAGE1 Tc = 25C Tc = -55C TO +125C OUTPUT CURRENT VIN = 12 to 50 VDC OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION VIN = 12 TO 50 VDC 10 kHz - 2 MHz Tc = -55C TO +125C V = 12 TO 50 VDC IN Tc = -55C TO +125C 10% TO FULL LOAD Tc = -55C TO +125C 50% TO FULL Tc = -55C TO +125C CONTINUOUS TRANSIENT 120 ms NO LOAD Tc = -55C TO +125C FULL LOAD Tc = -55C TO +125C INHIBITED Tc = -55C TO +125C 10k Hz - 10 MHz Tc = -55C TO +125C Tc = 25C Tc = -55C TO +125C POWER DISSIPATION Tc = -55C TO +125C RECOVERY Tc = --55C TO +125C 50 %-100%- 50% LOAD TRANSIENT Tc = -55C TO +125C RECOVERY Tc =-55C TO +125C 12 TO 50 TO 12 V IN TRANSIENT Tc = -55C TO +125C RECOVERY Tc = -55C TO +125C DELAY Tc = -55C TO +125C OVERSHOOT Tc = -55C TO +125C MCH2805S MCH285R2S MCH2812S MCH2815S MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 4.95 5 5.05 5.15 5.2 5.25 11.88 12 12.12 14.85 15 15.15 4.80 5 5.20 5.00 5.2 5.40 11.52 12 12.48 14.40 15 15.60 -- 300 0 -- 288 0 -- 125 0 -- 100 mA 0 -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 72 69 -- -- -- -- -400 -500 -- -- -400 -500 -- -- -- -- -- -- -- 45 65 35 40 350 380 100 115 28 -- 5.5 6.0 70 73 2.3 2.4 100 130 77 75 1.3 1.4 3.0 3.5 185 185 125 125 170 180 0.75 0.75 7 10 0 0 1.5 150 300 100 120 700 800 200 300 50 80 10 11 74 78 3.2 3.5 200 250 -- -- 2.0 2.3 12 15 400 500 500 600 400 500 3.0 4.0 20 40 100 150 0 -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 72 69 -- -- -- -- -400 -500 -- -- -- 45 65 35 40 350 380 100 115 28 -- 5.5 6.0 70 73 2.3 2.4 100 130 77 75 1.3 1.4 3.0 3.5 185 185 125 125 1.5 150 300 100 120 700 800 200 300 50 80 10 11 74 78 3.2 3.5 200 250 -- -- 2.0 2.3 12 15 400 500 500 600 0 -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 74 72 -- -- -- -- -700 -800 -- -- -- 50 70 60 70 600 640 145 160 28 -- 6.0 6.5 68 70 2.3 2.4 100 150 79 77 2.0 2.2 3.5 3.5 350 380 130 130 1.5 200 300 200 250 1300 1400 300 400 50 80 10 12 72 74 3.2 3.5 200 250 -- -- 3.2 3.5 15 20 700 800 500 600 0 -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 74 72 -- -- -- -- -700 -800 -- -- -- 1.5 UNITS VDC W mV p-p mV INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT INPUT RIPPLE CURRENT2 EFFICIENCY LOAD FAULT 3, 4 35 150 50 250 70 300 80 350 700 1500 760 1600 165 350 185 450 28 50 -- 70 6.0 11 6.5 12 68 72 70 74 2.3 3.2 2.4 3.5 100 200 150 250 79 -- 77 -- 2.3 3.7 2.5 4.0 4.0 18 4.0 20 350 380 140 180 700 800 600 750 750 850 2.0 2.5 20 40 300 450 mV VDC V mA mA p-p % W ms STEP LOAD RESPONSE5 mV pk s STEP LINE RESPONSE5 START-UP 0 TO 28 VDC -400 170 -500 180 -- 0.75 -- 0.75 -- 7 -- 10 -- 0 -- 0 400 -900 400 500 -1000 400 3.0 -- 0.6 4.0 -- 0.6 20 -- 7 40 -- 10 100 -- 0 150 -- 0 900 -750 400 1000 -850 450 2.5 -- 0.47 3.0 -- 0.5 20 -- 7 40 -- 10 250 -- 0 350 -- 0 mV pk ms ms mV pk See notes 1, 2, 3, 4, 5, and 6 on the following page. 2 DC/DC CONVERTERS DUAL OUTPUT MODELS PARAMETER 1 OUTPUT VOLTAGE OUTPUT CURRENT6 OUTPUT POWER OUTPUT RIPPLE VOLTAGE +VOUT -V OUT 7 8 MCH SERIES 1.5 WATT UNITS VDC mA W Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified. CONDITIONS Tc = 25C Tc = -55C TO +125C VIN = 12 TO 50 VDC VIN = 12 TO 50 VDC 10 kHz - 2 MHz Tc = -55C TO +125C 10 kHz - 2 MHz Tc = -55C TO +125C VIN = 12 TO 50 VDC Tc = -55C TO +125C 10% TO FULL -55C TO +125C 50% TO FULL -55C TO +125C CONTINUOUS TRANSIENT 120 ms NO LOAD Tc = -55C TO +125C FULL LOAD Tc = -55C TO +125C INHIBITED Tc = -55C TO +125C 10 kHz - 10 MHz Tc = -55C TO +125C Tc = 25C Tc = -55C TO +125C MCH2805D MIN TYP MAX 4.95 5 5.05 4.80 5 5.20 0 150 240 0 -- -- -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 73 70 -- -- -- -- -300 -400 -- -- -250 -300 -- -- -- -- -- -- -- 35 50 35 50 10 20 300 350 80 100 28 -- 5.0 6.0 69 72 2.3 2.4 100 130 77 75 1.4 1.6 3.7 3.8 130 140 100 100 125 130 0.6 0.6 8 10 0 0 1.5 150 250 150 250 50 100 600 700 200 300 50 80 10 12 73 77 3.2 3.5 200 250 -- -- 2.2 2.5 15 20 300 400 400 500 250 300 2.5 3.0 25 45 100 150 MCH2812D MCH2815D MIN TYP MAX MIN TYP MAX 11.88 12 12.12 14.85 15 15.15 11.52 12 12.48 14.40 15 15.60 0 62.5 100 0 50 80 0 -- -- -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 73 70 -- -- -- -- -600 -700 -- -- -500 -600 -- -- -- -- -- -- -- 35 40 35 40 100 110 550 570 115 130 28 -- 7.5 8.0 70 71 2.3 2.4 115 150 77 75 2.5 2.7 3.2 3.2 250 260 165 165 240 250 0.9 0.9 8 10 0 0 1.5 150 250 150 250 300 400 1100 1200 250 350 50 80 13 14 73 77 3.2 3.5 200 250 -- -- 3.8 4.2 15 20 600 700 700 800 500 600 3.0 4.0 25 45 250 350 0 -- -- -- -- -- -- -- -- -- -- 12 0 -- -- -- -- -- -- -- -- 72 69 -- -- -- -- -600 -700 -- -- -500 -600 -- -- -- -- -- -- -- 30 35 30 35 165 180 600 630 125 135 28 -- 7.5 8.0 71 72 2.3 2.4 90 120 76 74 2.7 3.0 4.0 4.0 250 270 50 50 220 230 0.6 0.7 8 10 0 0 1.5 150 250 150 250 500 650 1300 1400 300 400 50 70 13 14 74 78 3.2 3.5 200 250 -- -- 4.1 4.5 15 20 600 700 200 300 500 600 3.0 4.0 25 45 750 900 mV p-p LINE REGULATION mV LOAD REGULATION VOUT mV INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT VDC V mA INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT 2 mA p-p % W ms POWER DISSIPATION Tc = -55C TO +125C RECOVERY Tc = -55C TO +125C STEP LOAD 50 %-100%- 50% LOAD 5 TRANSIENT RESPONSE VOUT Tc = -55C TO +125C RECOVERY -55C TO +125C STEP LINE 12 TO 50 TO 12 VIN RESPONSE5 VOUT TRANSIENT Tc = -55C TO +125C RECOVERY Tc = -55C TO +125C START-UP DELAY 0 TO 28 VDC, VOUT Tc = -55C TO +125C OVERSHOOT Tc = -55C TO +125C 3,4 mV pk s mV pk ms ms mV pk Notes: 1. Specified at 50% load. 2. Lin = 2 H. 3. Maximum duration of short circuit: 25C-- 90 seconds, 125C - 30 seconds. 4. Load fault is a short circuit (<50 mohms). Recovery is into resistive full load. 5. Transition 10 s. Recovery = time to settle to within 1% of Vout final value. 6. Max. spec indicates 80% of the converter's total power, available from either output. 7. Specification applies to both + and - Vout. 8. Although no minimum load is required, at no load the output voltage may increase up to 15%. 3 MCH SERIES 1.5 WATT DC/DC CONVERTERS PIN OUT Pin 1 2 3 4 5 6 7 Single Output Positive Input Input Common Positive Output Output Common Case Ground No connection Inhibit Dual Output Positive Input Input Common Positive Output Output Common Case Ground Negative Output Inhibit Squared corner and dot on top of cover indicate pin one. 12 3 4 7 6 5 See page 7 for dimensions. FIGURE 2: PIN OUT MODEL NUMBERING KEY MCH Base Model Input Voltage Output Voltage (R = decimal point, 3R3 = 3.3 Vout) Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) 28 12 D / 883 SMD NUMBERS STANDARD MICROCIRCUIT DRAWING (SMD) 5962-9569601HXC IN PROCESS 5962-9569701HXC 5962-9569801HXC 5962-9570201HXC 5962-9570301HXC 5962-9570401HXC MCH SERIES SIMILAR PART MCH2805S/883 MCH285R2S/883 MCH2812S/883 MCH2815S/883 MCH2805D/883 MCH2812D/883 MCH2815D/883 For exact specifications for an SMD product, refer to the SMD drawing. Call your Interpoint representative for status on the MCH Series SMD releases which are "in process". SMDs can be downloaded from http://www.dscccols.com/programs/smcr 4 DC/DC CONVERTERS 90 80 12 VOLT 70 EFFICIENCY 28 VOLT EFFICIENCY 60 50 50 VOLT 70 EFFICIENCY 28 VOLT 60 50 50 VOLT 28 VOLT 60 50 90 90 80 80 12 VOLT 70 MCH SERIES 1.5 WATT TYPICAL PERFORMANCE CURVES: Tc = 25C, full load, Vin = 28 VDC, unless otherwise specified. 12 VOLT 50 VOLT 40 40 40 30 0.25 0.5 0 OUTPUT POWER 0.75 1 1.25 1.5 1.75 ALL 5 VOLT MODELS 30 0.25 0.5 0 OUTPUT POWER 1 1.25 1.5 1.75 0.75 12 & 15 VOLT SINGLE MODELS 30 0.25 0.5 0 OUTPUT POWER 1 1.25 1.5 1.75 0.75 12 & 15 VOLT DUAL MODELS EFFICIENCY vs LOAD EFFICIENCY vs LOAD EFFICIENCY vs LOAD FIGURE 3 FIGURE 4 FIGURE 5 0 20 V / div. VIN 20 ATTENUATION (dB) 50 VDC 100 mV / div. 12 VDC FULL LOAD TO HALF LOAD 40 60 100 mV / div. VOUT HALF LOAD TO FULL LOAD 80 100 1 10 60 FREQUENCY (kHz) MCH2815S - Representative of all models 200s / div. MCH2805S 500s / div. MCH2805S LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE AUDIO REJECTION FIGURE 6 FIGURE 7 FIGURE 8 20V/div. VIN 20 V / div. VIN 50 VDC 200 mV / div. 12 VDC +VOUT FULL LOAD TO HALF LOAD -VOUT HALF LOAD TO FULL LOAD 200 mV / div. 2V/div. +VOUT -VOUT 200s / div. MCH2815D VOUT -VOUT FULL LOAD TO HALF LOAD +VOUT HALF LOAD TO FULL LOAD 500s / div. MCH2815D 6 0 2 4 8 10 12 14 16 18 TIME (ms) MCH2805S Representative of all 5 volt models LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE TURN-ON INTO FULL LOAD FIGURE 9 FIGURE 10 FIGURE 11 5 MCH SERIES 1.5 WATT DC/DC CONVERTERS 4 VOUT VOLTAGE CHANGE (%) 5 V 2 VOUT VOLTAGE CHANGE (%) 2 4 -5 V TYPICAL PERFORMANCE CURVES: Tc = 25C, full load, Vin = 28 VDC, unless otherwise specified. 20V/div. VIN 12 V 15 V -15 V -12 V 0 0 +15 V +12 V +5 V 0 V for -VOUT 5V/div. -VOUT +VOUT -2 -2 0 V for +VOUT 0 5 10 15 20 25 30 35 40 45 TIME (ms) MCH2815D Also representative of MCH2812S & D and MCH2815S -4 10 20 40 50 30 OUTPUT LOAD (%) DUAL ISOLATED 50% LOAD +V; 50% TO 10% LOAD -V AND 50% LOAD -V; 50% TO 10% LOAD +V TURN-ON INTO FULL LOAD -4 90/10 70/30 50/50 30/70 10/90 OUTPUT LOAD (%) DUAL ISOLATED 90% TO 10% LOAD ON +V 10% TO 90% LOAD ON -V CROSS REGULATION CROSS REGULATION FIGURE 12 FIGURE 13 FIGURE 14 1.8 120 1.6 MAXIMUM POWER (W) 15 V SINGLE & DUAL 12 V SINGLE & DUAL 5V DUAL 5V SINGLE 90 TRIP POINT 125% EMISSION LEVEL (dB A) 100 80 Vout NOMINAL % 60 SAFE OPERATING AREA 40 20 NARROWBAND 70 CE 03 LI 1.4 M 50 IT 1.2 30 1.0 10 0.8 9 10 INPUT VOLTAGE 11 12 ALL MODELS 0 0 20 40 60 80 100 % OF FULL LOAD 120 140 160 .015 0.1 1 FREQUENCY (MHz) 10 50 LOW LINE DROPOUT OUTPUT VOLTAGE vs. OUTPUT LOAD MCH FILTERED WITH FMSA FIGURE 15 FIGURE 16 FIGURE 17 6 DC/DC CONVERTERS Dot on top of case indicates pin one. CASE A BOTTOM VIEW 0.805 max See Figure 19 (20.45) for pin configurations. MCH SERIES 1.5 WATT 0.980 max (24.89) Materials Header Kovar/Nickel/Gold (Case A3, Kovar/Nickel) Cover Kovar/Nickel Pins Kovar/Nickel/Gold, matched glass seal 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. FIGURE 18: CASE A MAXIMUM DIMENSIONS BOTTOM VIEW CASE A2 MCH Series: Screening - Standard, ES, or 883 Seam Seal Projection Weld 0.697 (17.70 0.018 0.002 dia. (0.46 0.05) 0.097 (2.46) 0.000 0.27 0.02 (6.9 0.5) 0.270 max (6.98) 0.000 0.000 0.270 max (6.86) 0.000 0.27 0.02 (6.9 0.5) 7 6 5 Squared corner and dot on top of case indicate pin one. 12 3 4 0.135 (3.43) 0.235 (5.97) 0.435 (11.05) 0.535 (13.59) FIGURE 19: CASE A 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. 0.835 (21.21) 7 MCH SERIES 1.5 WATT TEST DC/DC CONVERTERS ENVIRONMENTAL SCREENING 125C STANDARD 125C /ES /883 (Class H)* PRE-CAP INSPECTION Method 2017, 2032 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 yes yes yes 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 Contact Information: Interpoint Headquarters USA Phone: 1-800-822-8782 +425-882-3100 Email: power@intp.com www.interpoint.com Interpoint UK Phone: +44-1252-872266 Email: poweruk@intp.com Interpoint France Phone: +33-134285455 Email: powerfr@intp.com 8 22422-001-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. MGA Series is a trademark of Interpoint. Copyright (c) 1997 - 2000 Interpoint. 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