FEATURES MCH SERIES 1.5 WATT DC/DC CONVERTERS 28 VOLT INPUT • • • • • • • -55°C to +125°C 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 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 Series™ 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. 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.) 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. 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. POSITIVE 1 INPUT + 0.47 µF typical +VIN FB + INHIBIT 7 SHUTDOWN PWM CONTROLLER +VOUT + INPUT COMMON 3 POSITIVE OUTPUT 2 4 OUTPUT COMMON 6 NEGATIVE OUTPUT DUAL MODELS ONLY FIGURE 1: BLOCK DIAGRAM 1 DC/DC CONVERTERS MCH SERIES 1.5 WATT TYPICAL CHARACTERISTICS INHIBIT ABSOLUTE MAXIMUM RATINGS Input Voltage • 12 to 50 VDC Output Power • 1.5 W Capacitive Load • Single output models 200 µF • Dual output models 100 µF Lead Soldering Temperature (10 sec per lead) • 300°C Storage Temperature Range (Case) • –65°C to +150°C 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 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) • –55°C to +125°C full power • –55°C to +135°C absolute Derating Output Power/Current (Tc) • Linearly from 100% at 125°C to 0% at 135°C 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) • 25°C, 300 min, 370 typ, 450 max • –55°C to +125°C 270 min, 370 typ, 470 max Inhibit Pin Voltage (unit enabled) • 7 to 12 V Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. SINGLE OUTPUT MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE1 Tc = 25°C Tc = –55°C TO +125°C OUTPUT CURRENT VIN = 12 to 50 VDC OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT INPUT RIPPLE CURRENT2 EFFICIENCY 3, 4 LOAD FAULT STEP LOAD RESPONSE5 STEP LINE RESPONSE5 START-UP 0 TO 28 VDC VIN = 12 TO 50 VDC 0 — 1.5 0 — 1.5 0 — 1.5 0 10 kHz - 2 MHz Tc = –55°C TO +125°C V = 12 TO 50 VDC IN Tc = –55°C TO +125°C 10% TO FULL LOAD Tc = –55°C TO +125°C 50% TO FULL Tc = –55°C TO +125°C CONTINUOUS TRANSIENT 120 ms NO LOAD Tc = –55°C TO +125°C FULL LOAD Tc = –55°C TO +125°C INHIBITED Tc = –55°C TO +125°C 10k Hz - 10 MHz Tc = –55°C TO +125°C Tc = 25°C Tc = –55°C TO +125°C POWER DISSIPATION Tc = –55°C TO +125°C RECOVERY Tc = -–55°C TO +125°C 50 %–100%– 50% LOAD TRANSIENT Tc = –55°C TO +125°C RECOVERY Tc =–55°C TO +125°C 12 TO 50 TO 12 V IN TRANSIENT Tc = –55°C TO +125°C RECOVERY Tc = –55°C TO +125°C DELAY Tc = –55°C TO +125°C OVERSHOOT Tc = –55°C TO +125°C — — — — — — — — 12 0 — — — — — — — — 72 69 — — — — 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 3.5 150 300 100 120 700 800 200 300 50 80 10 11 74 78 3.2 3.5 200 250 — — 2.0 2.3 12 15 — — — — — — — — 12 0 — — — — — — — — 72 69 — — — — 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 3.5 150 300 100 120 700 800 200 300 50 80 10 11 74 78 3.2 3.5 200 250 — — 2.0 2.3 12 15 — — — — — — — — 12 0 — — — — — — — — 74 72 — — — — 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 3.5 200 300 200 250 1300 1400 300 400 50 80 10 12 72 74 3.2 3.5 200 250 — — 3.2 3.5 15 20 — — — — — — — — 12 0 — — — — — — — — 74 72 — — — — –400 –500 — — 185 185 125 125 400 500 500 600 –400 –500 — — 185 185 125 125 400 500 500 600 –700 –800 — — 350 380 130 130 700 800 500 600 –700 –800 — — –400 –500 — — — — — — 170 180 0.75 0.75 7 10 0 0 400 500 3.0 4.0 20 40 100 150 –400 170 –500 180 — 0.75 — 0.75 — 7 — 10 — 0 — 0 See notes 1, 2, 3, 4, 5, and 6 on the following page. 2 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 400 –900 400 500 –1000 400 3.0 — 0.6 4.0 — 0.6 20 — 7 40 — 10 100 — 0 150 — 0 — 1.5 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 20 350 380 140 180 700 800 600 750 900 –750 400 1000 –850 450 2.5 — 0.47 3.0 — 0.5 20 — 7 40 — 10 250 — 0 350 — 0 750 850 2.0 2.5 20 40 300 450 UNITS VDC W mV p-p mV mV VDC V mA mA p-p % W ms mV pk µs mV pk ms ms mV pk DC/DC CONVERTERS MCH SERIES 1.5 WATT Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. DUAL OUTPUT MODELS PARAMETER 1 OUTPUT VOLTAGE OUTPUT CURRENT6 OUTPUT POWER OUTPUT RIPPLE VOLTAGE +VOUT –V OUT 7 LINE REGULATION 8 LOAD REGULATION ±VOUT INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY 2 CONDITIONS Tc = 25°C Tc = –55°C TO +125°C VIN = 12 TO 50 VDC MCH2805D MIN TYP MAX ±4.95 ±5 ±5.05 ±4.80 ±5 ±5.20 0 ±150 240 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 VIN = 12 TO 50 VDC 0 — 1.5 0 — 1.5 0 — 1.5 10 kHz - 2 MHz Tc = –55°C TO +125°C — — 35 50 150 250 — — 35 40 150 250 — — 30 35 150 250 10 kHz - 2 MHz Tc = –55°C TO +125°C VIN = 12 TO 50 VDC Tc = –55°C TO +125°C 10% TO FULL –55°C TO +125°C — — — — — — 35 50 10 20 300 350 150 250 50 100 600 700 — — — — — — 35 40 100 110 550 570 150 250 300 400 1100 1200 — — — — — — 30 35 165 180 600 630 150 250 500 650 1300 1400 50% TO FULL –55°C TO +125°C CONTINUOUS TRANSIENT 120 ms NO LOAD Tc = –55°C TO +125°C FULL LOAD Tc = –55°C TO +125°C INHIBITED Tc = –55°C TO +125°C 10 kHz - 10 MHz Tc = –55°C TO +125°C Tc = 25°C Tc = –55°C TO +125°C — — 12 0 — — — — — — — — 73 70 80 100 28 — 5.0 6.0 69 72 2.3 2.4 100 130 77 75 200 300 50 80 10 12 73 77 3.2 3.5 200 250 — — — — 12 0 — — — — — — — — 73 70 115 130 28 — 7.5 8.0 70 71 2.3 2.4 115 150 77 75 250 350 50 80 13 14 73 77 3.2 3.5 200 250 — — — — 12 0 — — — — — — — — 72 69 125 135 28 — 7.5 8.0 71 72 2.3 2.4 90 120 76 74 300 400 50 70 13 14 74 78 3.2 3.5 200 250 — — — — — — 1.4 1.6 3.7 3.8 2.2 2.5 15 20 — — — — 2.5 2.7 3.2 3.2 3.8 4.2 15 20 — — — — 2.7 3.0 4.0 4.0 4.1 4.5 15 20 –300 –400 — — 130 140 100 100 300 400 400 500 –600 –700 — — 250 260 165 165 600 700 700 800 –600 –700 — — 250 270 50 50 600 700 200 300 –250 –300 — — — — 125 130 0.6 0.6 8 10 250 300 2.5 3.0 25 45 –500 –600 — — — — 240 250 0.9 0.9 8 10 500 600 3.0 4.0 25 45 –500 –600 — — — — 220 230 0.6 0.7 8 10 500 600 3.0 4.0 25 45 — — 0 0 100 150 — — 0 0 250 350 — — 0 0 750 900 3,4 POWER DISSIPATION Tc = –55°C TO +125°C RECOVERY Tc = –55°C TO +125°C STEP LOAD 50 %–100%– 50% LOAD 5 TRANSIENT RESPONSE ± VOUT Tc = –55°C TO +125°C RECOVERY –55°C TO +125°C STEP LINE 12 TO 50 TO 12 VIN RESPONSE5 ± VOUT TRANSIENT Tc = –55°C TO +125°C RECOVERY Tc = –55°C TO +125°C START–UP DELAY 0 TO 28 VDC, ± VOUT Tc = –55°C TO +125°C LOAD FAULT OVERSHOOT Tc = –55°C TO +125°C Notes: 1. Specified at 50% load. 2. Lin = 2 µH. 3. Maximum duration of short circuit: 25°C-– 90 seconds, 125°C – 30 seconds. 4. Load fault is a short circuit (<50 mohms). Recovery is into resistive full load. 5. Transition ≥ 10 µs. Recovery = time to settle to within 1% of Vout final value. UNITS VDC mA W mV p-p mV mV VDC V mA mA p-p % W ms mV pk µs mV pk ms ms mV pk 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 DC/DC CONVERTERS MCH SERIES 1.5 WATT 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. 1 2 7 3 4 6 5 See page 7 for dimensions. FIGURE 2: PIN OUT MODEL NUMBERING KEY MCH 28 12 D / 883 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.) 4 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 DC/DC CONVERTERS MCH SERIES 1.5 WATT TYPICAL PERFORMANCE CURVES: Tc = 25°C, full load, Vin = 28 VDC, unless otherwise specified. 90 90 90 80 80 12 VOLT 70 50 VOLT 60 50 70 28 VOLT 50 VOLT EFFICIENCY 28 VOLT EFFICIENCY 70 EFFICIENCY 80 12 VOLT 12 VOLT 60 50 40 40 0.25 0.5 0 OUTPUT POWER 0.75 0.25 0.5 0 OUTPUT POWER 1 1.25 1.5 1.75 ALL 5 VOLT MODELS 50 VOLT 50 40 30 30 28 VOLT 60 30 1 1.25 1.5 1.75 0.75 12 & 15 VOLT SINGLE MODELS 0.25 0.5 0 OUTPUT POWER EFFICIENCY vs LOAD EFFICIENCY vs LOAD FIGURE 4 FIGURE 3 1 1.25 1.5 1.75 0.75 12 & 15 VOLT DUAL MODELS EFFICIENCY vs LOAD FIGURE 5 VIN 50 VDC FULL LOAD TO HALF LOAD 12 VDC 40 100 mV / div. ATTENUATION (dB) 20 100 mV / div. 20 V / div. 0 60 80 100 1 VOUT HALF LOAD TO FULL LOAD 200µs / div. 10 60 FREQUENCY (kHz) MCH2815S - Representative of all models 500µs / div. MCH2805S MCH2805S LOAD TRANSIENT RESPONSE LINE TRANSIENT RESPONSE AUDIO REJECTION FIGURE 7 VOUT 6 0 2 4 8 10 12 14 16 18 TIME (ms) MCH2805S Representative of all 5 volt models FIGURE 8 VIN +VOUT FULL LOAD TO HALF LOAD –VOUT HALF LOAD TO FULL LOAD 50 VDC 12 VDC 200 mV / div. 20 V / div. VIN 200 mV / div. 2V/div. 20V/div. FIGURE 6 +VOUT –VOUT FULL LOAD TO HALF LOAD +VOUT HALF LOAD TO FULL LOAD –VOUT 200µs / div. MCH2815D 500µs / div. MCH2815D LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE FIGURE 10 FIGURE 11 TURN-ON INTO FULL LOAD FIGURE 9 5 DC/DC CONVERTERS MCH SERIES 1.5 WATT TYPICAL PERFORMANCE CURVES: Tc = 25°C, full load, Vin = 28 VDC, unless otherwise specified. 20V/div. VIN 0 V for –VOUT +VOUT 5V/div. –VOUT 0 V for +VOUT 4 ±5 V 2 –5 V ±VOUT VOLTAGE CHANGE (%) ±VOUT VOLTAGE CHANGE (%) 4 ±12 V ±15 V 0 -2 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 –15 V –12 V 0 +15 V +12 V +5 V -2 -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 -4 0 5 10 15 20 25 30 35 40 45 TIME (ms) MCH2815D Also representative of MCH2812S & D and MCH2815S 2 CROSS REGULATION CROSS REGULATION FIGURE 12 FIGURE 14 FIGURE 13 1.8 90 120 1.2 1.0 80 12 V SINGLE & DUAL 5V DUAL 5V SINGLE 60 SAFE OPERATING AREA 40 20 0.8 9 10 INPUT VOLTAGE 11 12 ALL MODELS LOW LINE DROPOUT FIGURE 15 6 NARROWBAND TRIP POINT 125% 100 EMISSION LEVEL (dB µA) 1.4 15 V SINGLE & DUAL Vout NOMINAL % MAXIMUM POWER (W) 1.6 0 0 20 40 60 80 100 % OF FULL LOAD 120 140 160 OUTPUT VOLTAGE vs. OUTPUT LOAD FIGURE 16 70 CE 03 50 LI M IT 30 10 .015 0.1 1 FREQUENCY (MHz) 10 MCH FILTERED WITH FMSA FIGURE 17 50 DC/DC CONVERTERS MCH SERIES 1.5 WATT Dot on top of case indicates pin one. CASE A BOTTOM VIEW 0.805 max See Figure 19 (20.45) for pin configurations. 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 300°C 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 Squared corner and dot on top of case indicate pin one. 0.697 (17.70 1 2 3 4 6 5 0.835 (21.21) 0.000 7 0.135 (3.43) 0.235 (5.97) 0.27 ±0.02 (6.9 ±0.5) 0.000 0.27 ±0.02 (6.9 ±0.5) 0.270 max (6.98) 0.000 0.270 max (6.86) 0.097 (2.46) 0.000 0.435 (11.05) 0.535 (13.59) 0.018 ± 0.002 dia. (0.46 ± 0.05) 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. 7 DC/DC CONVERTERS MCH SERIES 1.5 WATT ENVIRONMENTAL SCREENING TEST 125°C STANDARD 125°C /ES /883 (Class H)* PRE-CAP INSPECTION Method 2017, 2032 yes yes yes TEMPERATURE CYCLE (10 times) Method 1010, Cond. C, -65°C to 150°C Method 1010, Cond. B, -55°C to 125°C no no no yes yes no CONSTANT ACCELERATION Method 2001, 3000 g Method 2001, 500 g no no no yes yes no BURN-IN Method 1015, 160 hours at 125°C 96 hours at 125°C case (typical) no no no yes yes no FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55°C, +25°C, +125°C Subgroups 1 and 4: +25°C case no yes no yes yes no HERMETICITY TESTING Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) no no yes yes yes no yes yes no FINAL VISUAL INSPECTION Method 2009 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: www.interpoint.com Interpoint Headquarters USA Phone: 1-800-822-8782 +425-882-3100 Email: [email protected] Interpoint UK Phone: +44-1252-872266 Email: [email protected] 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 © 1997 - 2000 Interpoint. All rights reserved. Interpoint France Phone: +33-134285455 Email: [email protected]