FEATURES • • • • • • • • DC/DC CONVERTERS 5 VOLT INPUT –55°C to +85°C operation 4 to 8 VDC input Fully isolated Opto-coupler feedback Fixed frequency, 210 kHz typ. Inhibit function Indefinite short circuit protection Up to 80% efficiency MHL SERIES 15 WATT MODELS VDC OUTPUT DUAL ±12 ±15 Size (max.): Non-flanged, case F4 1.950 x 1.350 x 0.505 inches (49.53 x 34.29 x 12.83 mm) Flanged, case J5 2.720 x 1.350 x 0.505 inches (69.09 x 34.29 x 12.83 mm) See Section B8, cases F4 and J5, for dimensions. Weight: 57 grams typical Screening: Standard or ES. See Section C2 for screening options, see Section A5 for ordering information. DESCRIPTION The MHL Series™ of DC/DC converters offers either ±12 or ±15 volt outputs in a single package. MHL converters offer the high efficiency and wide input range of switching regulators with excellent load and line regulation. Input and output grounds are isolated from one another and from case ground. No external components are required for operation. The units are built using thick-film hybrid technology and are sealed in metal packages for military, aerospace, and other high-reliability applications. Unscreened models are sealed with solder and are guaranteed to pass a gross leak test (maximum leak rate of 1 x 10-3 atm.-cc/sec). Environmentally screened models (/ES) are hermetically sealed with solder and will pass a fine leak and gross leak test as described in Section C2. The MHL converters employ pulse-width modulated switching regulator techniques in the forward mode, with a nominal clock frequency of 210 kHz. Isolation is achieved through the use of a transformer in the forward power circuit and an opto-coupler in the feedback/control loop. The full load output power (15 watts) is available over the input range of 4 to 8 VDC. Up to 14.3 watts can be obtained from a single output up to a combined load of 15 watts. Typical Performance Curve 84 VIN =4 V VIN =5 V 82 EFFICIENCY (%) 80 The efficiency is high over the entire input voltage range and from approximately 25% of full load to full load. This feature makes the converters ideal for either battery or aircraft power applications. An inhibit function is provided to allow power shut-down and startup from a logic input. An open circuit on the inhibit terminal produces normal operation, and a low level disables the converter. Input current in the inhibit mode is typically 20 mA. The converter features a “soft-start” function which provides a controlled 20 millisecond turn-on upon application of input power or inhibit release. An input filter is incorporated in the unit to reduce input reflected ripple current. Both outputs are indefinitely protected against short circuits to ground or to one another by automatic current limiting circuitry. This feature adjusts the converter’s output current, indefinitely maintaining it below approximately 125% of the rated maximum during a full short circuit condition. The MHL Series of converters is rated to operate at full load at a case temperature of 85°C, with the output power derated linearly to zero at 115°C (0.5W/°C). Because of the unit’s high efficiency, heat sinking requirements are minimized, but due consideration should be given to removing self-generated heat when operating the device at maximum ratings. To increase dissipation, heat conducting material (PCB, copper sheet, heat sink, or Interpoint’s TMP accessory) should be brought into contact with the converter’s baseplate. When the MHL is used in applications requiring full-power operation for extended periods of time, or in shock and vibration environments, it is highly recommended that the flange-mount case option be used. This option provides improved thermal transfer capabilities as well as mechanically secure mounting configuration. 78 76 VIN =8 V 74 72 70 2 4 6 8 10 12 14 16 18 OUTPUT POWER (WATTS) MHL0515D Efficiency FIGURE 1 B4-17 DC/DC CONVERTERS MHL SERIES 15 WATT MODEL NUMBERING KEY ABSOLUTE MAXIMUM RATINGS Input Voltage • 4 to 8 VDC Output Power • 15 watts Lead Soldering Temperature (10 sec per lead) • 300°C Storage Temperature Range (Case) • –55°C to +125°C MHL 05 12 S INHIBIT Inhibit TTL Open Collector • Logic low (output disabled) • Referenced to input common • Logic high (output enabled) Open collector F / ES Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Case Option (Non-flanged case has no designator in this position) TYPICAL CHARACTERISTICS Screening (Standard screening has no designator in this position.) RECOMMENDED OPERATING CONDITIONS Input Voltage Range • 4 to 8 VDC continuous Case Operating Temperature (Tc) • –55°C to +85°C full power • –55°C to +115°C absolute Derating Output Power/Current • Linearly from 100% at 85°C to 0% at 115° C Output Voltage Temperature Coefficient • 150 ppm/°C, typical Input to Output Capacitance • 80 pF typical Isolation • 100 megohm minimum at 500 V Conversion Frequency • 210 kHz, typical Electrical Characteristics: 25°C Tc, 5 VDC Vin, 100% load, unless otherwise specified. PARAMETER OUTPUT VOLTAGE MHL0512D TYP MAX 12.00 12.12 12.00 12.12 MIN 11.88 11.88 OUTPUT CURRENT1 OUTPUT POWER1 OUTPUT RIPPLE LINE REGULATION 4 TO 8 VIN Tc = –55°C TO +85°C BW = 1 MHz +VOUT –VOUT — — — — — — — 40 0.05 0.05 1.25 15.0 100 0.10 0.15 — — — — — — — 40 0.05 0.05 1.00 15.0 120 0.10 0.15 LOAD REGULATION NO LOAD TO FULL +VOUT –VOUT — — 0.05 0.25 0.15 0.50 — — 0.03 0.20 0.10 0.40 % CROSS REGULATION2 +VOUT –VOUT — — 2.2 2.2 3.5 3.5 — — 1.9 1.9 3.0 3.0 % Tc = –55°C TO +85°C NO LOAD FULL LOAD INHIBITED 4 — — — — — 5 120 — 20 50 78 8 150 4500 — 120 — 4 — — — — — 5 140 — 20 70 78 8 180 4500 — 150 — INPUT VOLTAGE INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY FULL LOAD MIN 14.85 ±14.85 MHL0515D TYP MAX 15.00 15.15 15.00 15.15 CONDITIONS +VOUT –VOUT UNITS VDC A W mV p-p % VDC mA mA p-p % Notes 1. 95% of the maximum current or power is available from either output. The total of both outputs must not exceed the maximum specification. 2. The effect on the positive output when it is held at 50 mA while the negative output is varied from 50 to 950 mA. The effect on the negative output when it is held at 50 mA while the positive output is varied from 50 to 950 mA. PIN OUT Pin 1,2 3 4 5 6 7 8 9, 10 Designation Positive Input Positive Output Output Common Negative Output No Connection Case Ground Inhibit Input Common Squared corner and dot on top of cover indicate pin one. Dotted line outlines flanged package option. 1 2 3 5 BOTTOM VIEW MHL See Section B8, cases F4 and J5 for dimensions. 10 9 8 FIGURE 2: PIN OUT B4-18 4 23002-001-DTS Rev A DQ# 1018 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. MHL Series is a trademark of Interpoint. Copyright © 1994 - 1999 Interpoint. All rights reserved. 7 6 CASES CASE F Dot on top of case indicates pin one CASE F BOTTOM VIEW See Figures 20 - 23 for pin configuration Materials Header Case F1 Cold Rolled Steel/Nickel/Gold Cases F2 - F4 Cold Rolled Steel/Nickel/Tin Cover Case F1 Kovar/Nickel Cases F2 - F4 Cold Rolled Steel/Nickel/Tin Pins #52 alloy (all cases) MHV Series Triple – compression glass seal MTR Series Triple, case F1 – ceramic seal MTR Series Triple, case F2 – compression glass seal HUM40 – compression glass seal or ceramic seal Case F3 – compression glass seal Case F4 – compression glass seal or ceramic seal 1.350 max (34.29) 1.950 max (49.53) 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. Case dimensions in inches (mm) Tolerance ±0.005 (0.13) for three decimal places ±0.01 (0.2) for two decimal places unless otherwise specified FIGURE 19: CASE F MAXIMUM DIMENSIONS BOTTOM VIEW CASE F1 MTR Series Triple and MHV Series Triple: Screening – Standard, ES, or 883 Platform Bathtub Dot on top of case indicates pin one Seam Seal 1.170 (29.72) 0.040 dia. (1.02) 1 2 3 4 5 10 9 8 7 6 MTR Series MHV Series 0.170 (4.32) 1.770 (44.96) 1.370 (34.80) 0.970 (24.64) 0.570 (14.48) 0.170 (4.32) 0.000 0.25 (6.4) 0.000 0.25 (6.4) 0.405 max (10.29) 0.000 0.405 max (10.29) 0.000 FIGURE 20: CASE F1 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. B8-12 CASES CASE F BOTTOM VIEW CASE F4 MTO and MHL Series: Screening – Standard or ES HR153 Series: no screening options Squared corner and dot on top of case indicate pin one. Solder Seal 1.170 (29.72) 1 2 3 4 5 10 9 8 7 6 0.040 dia. (1.02) Solder Tip-off 0.170 (4.32) FIGURE 23: CASE F4 B8-14 1.770 (44.96) 1.370 (34.80) 0.970 (24.64) 0.570 (14.48) 0.170 (4.32) 0.000 0.250/0.300 (6.35/7.62) 0.000 0.505 max (12.83) 0.000 CASES CASE J Dot on top of case indicates pin one CASE J BOTTOM VIEW See Figures 36 - 40 for pin configuration 1.350 max (34.29) 2.720 max (69.09) Flange Thickness: Cases J1 and J5 Case J2 Cases J3 and J4 0.060 (1.52) 0.073 (1.85) max 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) Materials Header Case J1 Cold Rolled Steel/Nickel/Gold Cases J2 - J5 Cold Rolled Steel/Nickel/Tin Cover Case J1 Kovar/Nickel Case J2 - J5 Cold Rolled Steel/Nickel/Tin Pins #52 alloy (all cases) Case J1 MHV Series Triple – compression glass seal MTR Series Triple – ceramic seal Cases J2 - J5 compression glass seal Case dimensions in inches (mm) Tolerance ±0.005 (0.13) for three decimal places ±0.01 (0.2) 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 35: CASE J MAXIMUM DIMENSIONS 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. B8-22 CASES CASE J BOTTOM VIEW CASE J4 Flanged cases: Designator required in Case Option position of model number. FMD28-461 EMI Filter (down-leaded): Screening – Standard or ES Squared corner and dot on top of case indicate pin one. Solder Seal 1.173 (29.79 1 0.040 dia. (1.02) 2 0.162 dia (4.11) 0.673 (17.09) 4 3 1.770 (44.96) 5 0.173 (4.39) 1.370 (34.80) Solder Tip-off 1.980 (50.29) 0.170 (4.32) 0.000 0.210 (5.33) 0.25 (6.4) 0.000 0.505 max (12.83) 0.000 FIGURE 39: CASE J4 BOTTOM VIEW CASE J5 Flanged cases: Designator required in Case Option position of model number for MHL Series and MTO Series only. MHL Series, MTO Series, MTW Series: Screening – Standard or ES HR300 Series: no screening options Squared corner and dot on top of case indicate pin one. Solder Seal 1.173 (29.79 1 0.040 dia. (1.02) 2 3 4 5 0.162 dia (4.11) 0.673 (17.09) 9 8 7 6 1.770 (44.96) 10 0.173 (4.39) 1.370 (34.80) Solder Tip-off 1.980 (50.29) 0.970 (24.64) 0.570 (14.48) 0.170 (4.32) 0.000 0.210 (5.33) 0.25 (6.4) 0.000 0.505 max (12.83) 0.000 FIGURE 40: CASE J5 B8-25 QA SCREENING 85°C PRODUCTS 85°C PRODUCTS TEST (85°C Products excluding HR products) STANDARD /ES yes yes no yes no yes no yes yes yes Fine Leak, Method 1014, Cond. A no yes Gross Leak, Method 1014, Cond. C no yes Gross Leak, Dip (1 x 10-3) yes no yes yes PRE-CAP INSPECTION Method 2017 TEMPERATURE CYCLE (10 times) Method 1010, Cond. B, -55°C to 125°C CONSTANT ACCELERATION Method 2001, 500 g BURN-IN 96 hours at 70°C ambient (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 and 4: +25°C case HERMETICITY TESTING FINAL VISUAL INSPECTION Method 2009 Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Applies to the following products: MFW Series MTW Series MHE/MLP Series MHL Series MRH Series MTO Series MSR Series DCH Series FM/FMA/FMB EMI Filters MSF EMI Filter C2-12