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FEATURES
* * * * * * * * -55C to +85C 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
DC/DC CONVERTERS 5 VOLT INPUT
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 SeriesTM 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. 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 85C, with the output power derated linearly to zero at 115C (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.
V =8 V IN
Typical Performance Curve
84
V =4 V IN
82 80
V =5 V IN
EFFICIENCY (%)
78 76 74 72 70
2
4
6
8
10
12
14
16
18
OUTPUT POWER (WATTS)
MHL0515D Efficiency FIGURE 1
B4-17
MHL SERIES 15 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage * 4 to 8 VDC Output Power * 15 watts Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -55C to +125C
DC/DC CONVERTERS
MODEL NUMBERING KEY
MHL Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Case Option (Non-flanged case has no designator in this position) Screening (Standard screening has no designator in this position.) 05 12 S F / ES
INHIBIT
Inhibit TTL Open Collector * Logic low (output disabled) * Referenced to input common * Logic high (output enabled) Open collector
TYPICAL CHARACTERISTICS
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
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range * 4 to 8 VDC continuous Case Operating Temperature (Tc) * -55C to +85C full power * -55C to +115C absolute Derating Output Power/Current * Linearly from 100% at 85C to 0% at 115 C
Electrical Characteristics: 25C Tc, 5 VDC Vin, 100% load, unless otherwise specified.
PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT1 OUTPUT POWER1 OUTPUT RIPPLE LINE REGULATION 4 TO 8 VIN LOAD REGULATION NO LOAD TO FULL CROSS REGULATION2 INPUT VOLTAGE INPUT CURRENT CONDITIONS +VOUT -VOUT Tc = -55C TO +85C BW = 1 MHz +VOUT -VOUT +VOUT -VOUT +VOUT -VOUT Tc = -55C TO +85C NO LOAD FULL LOAD INHIBITED FULL LOAD MIN 11.88 11.88 -- -- -- -- -- -- -- -- -- 4 -- -- -- -- -- MHL0512D TYP MAX 12.00 12.12 12.00 12.12 -- -- 40 0.05 0.05 0.05 0.25 2.2 2.2 5 120 -- 20 50 78 1.25 15.0 100 0.10 0.15 0.15 0.50 3.5 3.5 8 150 4500 -- 120 -- MIN 14.85 14.85 -- -- -- -- -- -- -- -- -- 4 -- -- -- -- -- MHL0515D TYP MAX 15.00 15.15 15.00 15.15 -- -- 40 0.05 0.05 0.03 0.20 1.9 1.9 5 140 -- 20 70 78 1.00 15.0 120 0.10 0.15 0.10 0.40 3.0 3.0 8 180 4500 -- 150 -- UNITS VDC A W mV p-p % % % VDC mA mA p-p %
INPUT RIPPLE CURRENT EFFICIENCY
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
4
5
BOTTOM VIEW MHL
See Section B8, cases F4 and J5 for dimensions. 10 9 8 7 6
FIGURE 2: PIN OUT
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 (c) 1994 - 1999 Interpoint. All rights reserved.
B4-18
CASE F
CASES
Dot on top of case indicates pin one 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 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
CASE F BOTTOM VIEW See Figures 20 - 23 for pin configuration
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 300C for 10 seconds per pin.
FIGURE 19: CASE F MAXIMUM DIMENSIONS
BOTTOM VIEW CASE F1 MTR Series Triple and MHV Series Triple: Screening - Standard, ES, or 883
Bathtub Platform Dot on top of case indicates pin one
1.170 (29.72) 0.040 dia. (1.02) MHV Series MTR Series
Seam Seal
1
2
3
4
5
10 0.170 (4.32) 0.000 0.25 (6.4) 0.405 max (10.29) 0.000 0.000 0.170 (4.32)
9
8
7
6
0.570 (14.48)
0.970 (24.64)
1.370 (34.80)
0.405 max (10.29)
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
0.25 (6.4)
FIGURE 20: CASE F1
1.770 (44.96)
0.000
CASE F
CASES
BOTTOM VIEW CASE F4 MTO and MHL Series: Screening - Standard or ES HR153 Series: no screening options
Solder Seal
1.170 (29.72) 0.040 dia. (1.02)
Squared corner and dot on top of case indicate pin one.
1
2
3
4
5
Solder Tip-off
0.170 (4.32) 0.000 0.505 max (12.83) 0.250/0.300 (6.35/7.62) 0.000 0.000
10
9
8
7
6
0.170 (4.32)
0.570 (14.48)
0.970 (24.64)
1.370 (34.80)
FIGURE 23: CASE F4
B8-14
1.770 (44.96)
CASE J
CASES
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 300C 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
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
Solder Seal
1.173 (29.79 0.040 dia. (1.02) 0.673 (17.09)
CASE J
Squared corner and dot on top of case indicate pin one.
1
2 0.162 dia (4.11)
Solder Tip-off
0.173 (4.39) 0.000 0.000 0.25 (6.4) 0.210 (5.33) 0.000 0.170 (4.32) 1.370 (34.80) 0.505 max (12.83) 1.770 (44.96) 1.980 (50.29) 0.162 dia (4.11) 1.980 (50.29) 5 4 3
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
Solder Seal
1.173 (29.79 0.040 dia. (1.02) 0.673 (17.09)
Squared corner and dot on top of case indicate pin one.
1
2
3
4
5
Solder Tip-off
0.173 (4.39) 0.000 0.000 0.25 (6.4) 0.210 (5.33) 0.000 0.170 (4.32) 0.570 (14.48) 0.970 (24.64) 1.370 (34.80) 0.505 max (12.83) 1.770 (44.96) 10 9 8 7 6
FIGURE 40: CASE J5
B8-25
QA SCREENING 85C PRODUCTS
85C PRODUCTS
TEST (85C Products excluding HR products) PRE-CAP INSPECTION Method 2017 TEMPERATURE CYCLE (10 times) Method 1010, Cond. B, -55C to 125C CONSTANT ACCELERATION Method 2001, 500 g BURN-IN 96 hours at 70C ambient (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A 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 no no yes yes yes no yes yes no yes no yes no yes yes yes STANDARD /ES
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

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