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FEATURES
* -55C to +85C operation * 10 to 16 VDC input or 16 to 36 VDC input typical * Fully isolated * Opto-coupler feedback * Fixed frequency 125 kHz typical * Topology - Push-Pull Forward * Transient protection 50 V for up to 50 ms 28 Vin models * Inhibit function * Indefinite short circuit protection * Trimmable output on single models * Up to 83% efficiency
DC/DC CONVERTERS 12 AND 28 VOLT INPUT
MHE/MLP SERIES 20 WATT
MODELS
VDC OUTPUT SINGLE DUAL 5 12 12 15 15
Size (max.): Non-flanged 2.125 x 1.125 x 0.495 MHE (case H6) inches or 0.417 MLP (case H4) (53.98 x 28.58 x 12.57 (MHE) or 10.59 (MLP) mm) Flanged 2.910 x 1.125 x 0.495 MHE (case K7) inches or 0.417 MLP (case K5) (73.91 x 28.58 x 12.57 (MHE) or 10.59 (MLP) mm) See Section B8, cases H4, H6, K5, and K7, for dimensions. Weight: 50 grams typical Screening: Standard or ES. See Section C2 for screening options, see Section A5 for ordering information.
DESCRIPTION
The MHE SeriesTM and the MLP SeriesTM DC/DC converters offer the high efficiencies associated with switching regulators, yet have full isolation and the excellent regulation typical of linear regulators. No external components are required for operation. MHE Series and MLP Series converters are built using thick-film hybrid technology, and are sealed in metal packages for military, aerospace, and other high-reliability applications. Unscreened models are solder sealed and are guaranteed to pass a gross leak test (maximum leak rate of 1 x 10-3 atm.-cc/sec). Environmentally screened models are hermetically sealed and are screened as described in Section C2. The MHE Series and MLP Series converters are pulse-width modulated switching regulators operating in the forward mode, with a nominal switching frequency of 125 to 140 kHz. Isolation is achieved through the use of a transformer in the forward power circuit, and an optocoupler is used in the feedback/control loop. The full load output power is available over the full input voltage range. Short-term transients of 50 volts will not impair normal operation for 28 volt input models. The efficiency is typically greater than 80% over the entire input voltage range and from approximately 25% of full load to full load. This feature makes the MHE/MLP Series converters ideal for either battery or aircraft power applications.
An inhibit function is provided on MHE/MLP Series converters to allow power shutdown and startup from a logic input. The unit is inhibited when the inhibit input pin (pin 2) is connected to the input common (pin 10). The open circuit voltage of the inhibit pin is 8 to 10 VDC for 12 V input models or 11 to 13 VDC for 28 V input models. During inhibit, the input inhibit pin must sink approximately 1 mA. In the inhibit mode, converter output drops to less than 1 V and the input current is typically 8 mA. Automatic current limiting circuitry protects the MHE/MLP Series converters against short circuits. MHE/MLP Series converters are rated to operate at full load up to a case temperature of 85C, with the output power derated linearly to zero at 115C. 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, etc.) should be brought into contact with the converter's baseplate. When the MHE/MLP Series converters are 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 option be used. This option provides improved thermal transfer capabilities as well as a mechanically secure mounting configuration.
B4-13
MHE/MLP SERIES 20 WATT
ABSOLUTE MAXIMUM RATINGS
Output Power * 10 to 20 watts depending on model Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -55C to +125C
DC/DC CONVERTERS
INHIBIT
Inhibit TTL Open Collector * Logic low (output disabled) Logic low voltage 0.8 V * Referenced to input common * Logic high (output enabled) Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient * 150 ppm/C, typical Input to Output Capacitance * 60 pF, typical Current Limit * 125% of full load, typical Isolation * 100 megohm minimum at 500 V Conversion Frequency * 125 kHz, typical Inhibit Pin Voltage (unit enabled) * 11 to 13 V MHE28XXX, MLP28XXX * 8 to 10 V MHE12XXX
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range Continuous * 17 to 40 VDC MHE28XXX * 10 to 16 VDC MHE12XXX * 16 to 40 VDC MLP28XXX Transient * 50 V for 50 msec on 28 V input models Case Operating Temperature (Tc) * -55C to +85C full power Derating Output Power/Current * Linearly from 100% at 85C to 0% at 115 C * MHE28XXX models derate by 33% at 16 Vin
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MHE12XX MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION INPUT VOLTAGE INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY CONDITION -55C TO +85C -55C TO +85C 0 TO 1 MHz VIN MIN TO MAX NO LOAD TO FULL CONTINUOUS TRANSIENT 50 ms NO LOAD 10 kHz - 2 MHz MIN 4.95 -- -- -- -- -- 10 -- -- -- 78 MHE1205S TYP 5.00 -- -- 35 2 10 12 -- -- 30 81 MAX 5.05 3 15 70 5 20 16 -- 24 80 -- MIN 11.88 -- -- -- -- -- 10 -- -- -- 79 MHE1212S TYP 12.00 -- -- 35 3 5 12 -- -- 30 82 MAX 12.12 1.25 15 70 10 15 16 -- 32 80 -- MHE1215S MIN 14.85 -- -- -- -- -- 10 -- -- -- 80 TYP 15.00 -- -- 35 3 10 12 -- -- 30 83 MAX UNITS 15.15 VDC 1.0 A 15 70 10 20 16 -- 32 80 -- W mV p-p mV mV VDC V mA mA p-p %
B4-14
DC/DC CONVERTERS
SINGLE AND DUAL MHE28XX MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE OUTPUT CURRENT1 -55 TO +85C OUTPUT POWER1 OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION INPUT VOLTAGE INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY -55 TO +85C 0 - 1 MHz VIN MIN TO MAX NO LOAD TO FULL CONTINUOUS TRANSIENT 50 ms NO LOAD 10 kHz - 2 MHz
MHE/MLP SERIES 20 WATT
UNITS VDC A W mV p-p mV mV VDC V mA mA p-p %
Electrical Characteristics: 25C Tc, 28 VDC Vin (12 Vin for 12 V models), 100% load, unless otherwise specified.
MHE2805S MHE2812S MHE2815S MHE2812D MHE2815D MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 11.88 12.00 12.12 14.85 15.00 15.15 -- -- 3.0 -- -- 1.67 -- -- 1.33 -- -- 0.63 -- -- 0.5 -- -- -- -- 17 -- -- -- 78 -- 35 2 10 28 -- -- 20 81 15 60 5 20 40 50 18 50 -- -- -- -- -- 17 -- -- -- 79 -- 60 3 5 28 -- -- 25 82 20 80 10 15 40 50 30 50 -- -- -- -- -- 17 -- -- -- 80 -- 30 3 5 28 -- -- 25 83 20 60 10 15 40 50 30 50 -- -- -- -- -- 17 -- -- -- 76 -- 30 3 5 28 -- -- 25 79 15 50 10 15 40 50 35 50 -- -- -- -- -- 17 -- -- -- 76 -- 30 3 5 28 -- -- 25 79 15 50 15 15 40 50 35 50 --
SINGLE AND DUAL MLP MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE OUTPUT CURRENT1 -55 TO +85C OUTPUT POWER1 OUTPUT RIPPLE VOLTAGE LINE REGULATION -55 TO +85C 0 - 1 MHz VIN MIN TO MAX
MLP2805S MLP2812S MLP2815S MLP2812D MLP2815D MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 11.88 12.00 12.12 14.85 15.00 15.15 -- -- 2 -- -- 1.25 -- -- 1 -- -- 0.41 -- -- 0.33 -- -- -- -- 16 -- -- -- 78 -- 25 2 10 28 -- -- 20 81 10 60 5 20 40 50 20 50 -- -- -- -- -- 16 -- -- -- 79 -- 30 3 5 28 -- -- 25 82 15 50 10 15 40 50 30 50 -- -- -- -- -- 16 -- -- -- 80 -- 30 3 5 28 -- -- 25 83 15 50 10 15 40 50 30 50 -- -- -- -- -- 16 -- -- -- 78 -- 30 3 5 28 -- -- 25 81 10 60 10 15 40 50 30 50 -- -- -- -- -- 16 -- -- -- 78 -- 30 3 5 28 -- -- 25 81 10 60 10 15 40 50 30 50 --
UNITS VDC A W mV p-p mV mV VDC V mA mA p-p %
LOAD REGULATION NO LOAD TO FULL INPUT VOLTAGE CONTINUOUS TRANSIENT 50 ms INPUT CURRENT NO LOAD INPUT RIPPLE CURRENT 10 kHz - 2 MHz EFFICIENCY
Note 1. On dual output models at least 25% of the load should be on the positive output.
B4-15
MHE/MLP SERIES 20 WATT
Pin 1 2 3 4 5 6 7 8 9 10 Single Output Positive Input Inhibit Output Adjust Output Common Positive Output No connection No connection Case Ground No connection Input Common
DC/DC CONVERTERS
PIN OUT Dual Output Positive Input Inhibit Positive Output Output Common Negative Output No connection No connection Case Ground No connection Input Common Squared corner and dot on top of cover indicate pin one.
1
2
3
4
5
BOTTOM VIEW MHE and MLP
10 9 8 7 6
Dotted line outlines flanged package option.
See Section B8, case H4, H6, K5 and K7 for dimensions.
FIGURE 1: PIN OUT
MODEL NUMBERING KEY
MHE 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.) 28 12 S F / ES
OUTPUT ADJUSTMENT RESISTOR VALUES FOR MHE2805S AND MLP2805S
TYPICAL PERFORMANCE CURVE
Resistance Pin 3 to 4 Output Voltage Increase (%)
0 +1% +2% +3% +4% +5% 86 18 V 84 82 28 V
390K 145K 63K 22K 0
Efficiency (%)
80 78 76 74 72 2.5 5.0 7.5 10.0 12.5 15.0 36 V
Output Adjustment all single output models: The output can be adjusted upward by using the output adjust (pin3). The resistance between output adjust (pin 3) and output common (pin 4) will determine the magnitude of the increase in the output. The table above is applicable only to MHE2805S and MLP2805S.
Output Power (Watts)
MLP2815S Efficiency
FIGURE 2
B4-16
22820-001-DTS Rev B 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. MHE Series and MLP Series are trademarks of Interpoint. Copyright (c) 1995 - 1999 Interpoint. All rights reserved.
CASES
Dot on top of case indicates pin one
CASE H
CASE H BOTTOM VIEW See Figures 29 - 34 for pin configurations.
1.125 max (28.58)
2.125 max (53.98)
Materials Header Cold Rolled Steel/Nickel/Gold cases H1 and H2 Cold Rolled Steel/Nickel/Tin cases H3, H4, and H5 Cover Kovar/Nickel cases H1 and H2 Cold Rolled Steel/Nickel/Tin cases H3, H4, and H5 Pins #52 alloy ceramic seal case H1 case H2 (except MHV Series Single and Dual) compression glass seal MHV Series Single and Dual case H3, H4, H5 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 28: CASE H MAXIMUM DIMENSIONS
BOTTOM VIEW CASE H1 FMC EMI Filter: Screening - Standard, ES, or 883 SFMC EMI Filter: Screening - Space Standard, H, or K
Seam Seal
0.040 dia (1.02) 1.110 (28.19) 0.955 (24.26) 1 0.555 (14.1) 5 0.155 (3.94) 0.000 0.400 max. (10.16) 0.000 0.25 0.03 (6.4 0.8) 0.000 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 4 2 3
Squared corner and dot on top of case indicate pin one.
FIGURE 29: CASE H1
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.
B8-17
CASE H
CASES
BOTTOM VIEW CASE H4 MTR Series Dual: Standard or ES MLP Series: Screening - Standard or ES
Solder Seal
1.120 (28.45) 0.960 (24.38) 0.040 dia (1.02) 1 2 3 4 5
Dot on top of case indicates pin one
All H4 cases
Solder Tip-off
MTR Series Dual, (Standard or ES)
10 0.160 (4.06) 0.000 0.000 0.255 (6.48) 0.655 (16.64) 1.055 (26.80) 1.455 (36.96) 1.855 (47.12) 5 6 1.855 (47.12) 9 8 7 6
0.417 max (10.59)
0.25 +0.05/-0.00 (6.4 +1.3/-0.0)
Dot on top of case indicates pin one
1.120 (28.45) 0.960 (24.28) 1 2 3 4
MLP Series
10 0.160 (4.06) 0.000 0.000 0.255 (6.48) 0.655 (16.64) 1.055 (26.80) 1.455 (36.96) 2.110 (53.59) 9 8 7
FIGURE 32: CASE H4
B8-20
2.110 (53.59)
0.000
CASES
BOTTOM VIEW CASE H5 FMA-461and FMB-461 EMI Filter: Screening - Standard of ES
Solder Seal
1.120 (28.45) 0.960 (24.38) 0.040 dia (1.02) 0.560 (14.22) 1 2
CASE H
Squared corner and dot on top of case indicate pin one.
3
Solder Tip-off
5 0.160 (4.06) 0.000 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) 1.855 (47.12) 2 3 4 5 9 8 7 6 0.655 (16.64) 1.055 (26.80) 1.455 (36.96) 0.495 max (12.57) 2.110 (53.59) 2.110 (53.59) 0.000 0.000 0.255 (6.48) 4
FIGURE 33: CASE H5
BOTTOM VIEW CASE H6 MHE Series: Screening - Standard or ES HR151 Series and HR152 Series: no screening options
Solder Seal
1.120 (28.45) 0.960 (24.38) 0.040 dia (1.02) 1
Dot on top of case indicates pin one
Solder Tip-off
10 0.160 (4.06) 0.000 0.000 0.255 (6.48) 0.495 max (12.57) 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) 1.855 (47.12) 0.000
FIGURE 34: CASE H6
B8-21
CASE K
CASES
Dot on top of case indicates pin one
CASE K BOTTOM VIEW See Figures 42 - 48 for pin configuration
1.125 max (28.58)
2.910 max (73.91)
Flange Thickness: Cases K1, K2, K3 and MLP Series (K5) 0.060 (1.52) Cases K4, K5 (except MLP Series), K6, K7, and K8 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) Materials Header Case K1 - K3 Cold Rolled Steel/Nickel/Gold Cases K4 - K8 Cold Rolled Steel/Nickel/Tin Cover Case K1 - K3 Kovar/Nickel Case K4 - K8 Cold Rolled Steel/Nickel/Tin Pins #52 alloy (all cases) Case K1, K2, and K3 (except MHV Series Single and Dual) ceramic seal Cases K4 - K8 and MHV Series Single and Dual (K3) 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 41: CASE K MAXIMUM DIMENSIONS
B8-26
CASES
BOTTOM VIEW CASE K4 Flanged case: Designator required in Case Option position of model number. FM-461 EMI Filter: Screening - Standard or ES
Solder Seal
1.115 (28.32) 0.955 (24.26) 0.040 dia (1.02) 0.555 (14.1) 1 2 3
CASE K
Squared corner and dot on top of case indicate pin one.
0.162 dia (4.11)
Solder Tip-off
5 0.155 (3.94) 0.000 0.230 (5.84) 0.417 max (10.59) 0.25 0.03 (6.4 0.8) 1.845 (46.86) 2.320 (58.93) 5 6 1.845 (46.86) 5 6 1.845 (46.86) 2.320 (58.93) 2.320 (58.93) 0.000 0.000 0.245 (6.22) 4
FIGURE 45: CASE K4
BOTTOM VIEW CASE K5 Flanged cases: Designator required in Case Option position of model number. MTR Series Dual and MLP Series: Screening - Standard or ES
Solder Seal
1.115 (28.32) 0.955 (24.26)
Squared corner and dot on top of case indicate pin one.
All K5 cases
Solder Tip-off
0.040 dia (1.02) 0.555 (14.1)
1
2
3 MTR Series Dual (Standard and ES)
4
10 0.155 (3.94) 0.000 - 0.230 (5.84) 0.000 0.245 (6.22)
9
8
7
0.645 (16.38)
1.045 (26.54)
0.417 max (10.59)
0.25 0.03 (6.4 0.8)
Squared corner and dot on top of case indicate pin one.
1.115 (28.32) 0.955 (24.26) 1 0.555 (14.1) 10 0.155 (3.94) 0.000 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.000 0.230 (5.84) 0.245 (6.22) 9 2 3 MLP Series 8 7 4
FIGURE 46: CASE K5
1.445 (36.70)
0.000
B8-29
CASE K
CASES
BOTTOM VIEW CASE K6 Flanged cases: Designator required in Case Option position of model number. FMA-461 and FMB-461 EMI Filters: Screening - Standard or ES
Solder Seal
1.115 (28.32) 0.955 (24.26) 0.040 dia (1.02) 0.555 (14.1) 1 2 3 0.162 dia (4.11)
Squared corner and dot on top of case indicate pin one.
Solder Tip-off
5 0.155 (3.94) 0.000 0.230 (5.84) 0.25 0.03 (6.4 0.8) 1.845 (46.86) 0.495 max (12.57) 2.090 (53.01) 5 6 1.845 (46.86) 2.320 (58.93) 2.320 (58.93) 0.000 0.000 0.245 (6.22) 4
FIGURE 47: CASE K6
BOTTOM VIEW CASE K7 Flanged case: Designator required in Case Option position of model number. MHE Series: Screening - Standard or ES
Solder Seal
1.115 (28.32) 0.955 (24.26) 0.040 dia (1.02) 0.555 (14.1) 1 2 3 4
Squared corner and dot on top of case indicate pin one.
Solder Tip-off
10 0.155 (3.94) 0.000 - 0.230 (5.84) 0.000 0.245 (6.22) 0.645 (16.38) 1.045 (26.54) 0.495 max (12.57) 0.25 0.03 (6.4 0.8) 1.445 (36.70) 0.000 9 8 7
FIGURE 48: CASE K7
B8-30
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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