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Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
FEATURES
* * * * * * -55 to +125C operation 16 to 40 VDC input (16 to 48 VDC triple) Fully isolated Optocoupler feedback Fixed frequency 550 kHz typical - 450 kHz triple models Topology - Single and dual: Single Ended Forward - Triple: Current Mode Flyback Transient protection - Single and dual: 50 V/50 ms - Triple: 80 V/120 ms Inhibit and sync functions Indefinite short circuit protection Undervoltage lockout Up to 84% efficiency, 28 W/in3 - Up to 76% efficiency triple models
*
MODELS
VDC OUTPUT SINGLE DUAL TRIPLE 3.3 5 +5 & 12 5 12 +5 & 15 5.2 15 12 15 28
* * * *
MHF+ SERIESTM SINGLE & DUAL DC/DC CONVERTERS
The MHF+ Single and Dual SeriesTM of high frequency DC/DC converters offers a wide input voltage range of 16 to 40 volts and up to 15 watts of output power. The units are capable of withstanding short term transients up to 50 volts. The package is a hermetically sealed, welded metal case. Flanged and non-flanged models are available.
HIGHER POWER DENSITY
The MHF+ Series offers a new standard of performance for small size and high power density. At just 0.33 inch high and a total footprint of 1.7 in2, this low profile package offers a total power density of up to 28 watts per cubic inch.
CONVERTER DESIGN
The MHF+ converters are switching regulators that use a quasisquare wave, single-ended forward converter design with a constant switching frequency of 550 kHz. Isolation between input and output circuits is provided with a transformer in the forward path and a temperature compensated optical link in the feedback control loop. For the MHF+ dual output models, good cross regulation is maintained by tightly coupled output magnetics. Up to 90% of the total output power (80% on 2805D) is available from either output, providing the opposite output is simultaneously carrying 10% of the total output power (20% on 2805D models). Predictable current limit is accomplished by directly monitoring the output load current and providing a constant current output above the overload point.
LOW NOISE, HIGH AUDIO REJECTION
The MHF+ converters' feed-forward compensation system provides excellent dynamic response and noise rejection. Audio rejection is typically 50 dB. Typical output voltage response for a 50% to 100% step load transient is as low as 1.3% with a 150 msec recovery time. Input ripple current is typically 35 mA p-p with output ripple voltage typically 30 mV p-p .
INHIBIT FUNCTION
MHF+ converters provide an inhibit terminal that can be used to disable internal switching, resulting in no output and very low quiescent input current. The converter is inhibited when a TTL compatible low (0.8 - output disabled) is applied to the inhibit pin. The unit is enabled when the pin, which is internally connected to a pull-up resistor, is left unconnected or is connected to an open-collector gate. The open circuit output voltage associated with the inhibit pin is 8.5 to 12 V. In the inhibit mode, a maximum of 4 mA must be sunk from the inhibit pin.
Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 * Redmond WA 98073-9705 425.882.3100 * electronics@craneae.com www.craneae.com
Page 1 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
SYNCHRONIZATION
A synchronization feature is included with the MHF+ Series that allows the user to match the switching frequency of the converter to the frequency of the system clock. An external synchronization feature is included that allows the user to adjust the nominally 550 kHz operating frequency to any frequency within the range of 500 kHz to 600 kHz. This is initiated by applying a TTL compatible input of the desired frequency to pin 5.
SOFT START FEATURE
The soft-start feature provides a controlled 20 milliseconds turn-on to minimize inrush current and reduce overshoot at initial start-up or when inhibit is released.
SYNCHRONIZATION
To synchronize the converter's switching frequency to a system clock apply the clock signal to the sync terminal (pin 7). When multiple converters are powered from a single power source, asynchronous (free run) operation will result in lower peak noise for common spectral peaks, but synchronous operation will eliminate any possibility of interference frequencies in the low audio band. Source impedance of the signal should be less than 100 ohms and the transition time should be less than 100 nanoseconds. The capacitively coupled sync input will synchronize on a differential signal of as low as 4 volts to as high as 5 V. If the sync function is not used, the terminal should be left open.
SHORT CIRCUIT PROTECTION
MHF+ Series converters provide short circuit protection by restricting the output current to approximately 115% of the full load output current. The output current is sensed in the secondary stage to provide highly predictable and accurate current limiting, and to eliminate foldback characteristics.
UNDERVOLTAGE LOCKOUT
Undervoltage lockout prevents the units from operating below approximately 14 VDC input voltage to keep system current levels smooth, especially during initialization or re-start operations.
SHORT CIRCUIT PROTECTION
Internal current limiting circuitry protects all three outputs against short circuits. When output power exceeds approximately 130% of maximum output power, the output currents are limited. In addition, separate current limiting circuitry protects each output individually resulting in normal operation of either the main or the auxiliaries, whichever is not in a shorted condition.
MHF+ SERIESTM TRIPLE DC/DC CONVERTERS
MHF+ SeriesTM Triple DC/DC converters provide a wide input voltage range of 16 to 48 VDC delivering 15 watts of total output power with output voltages of +5 and 12 or +5 and 15 VDC. The main output, +5 VDC, will supply up to 7.5 watts and the auxiliaries will supply up to 7.5 watts of combined power. Full power operation at -55 C to +125 C plus the ability to withstand transients of up to 80 V for up to 120 milliseconds make these converters an ideal choice for your high reliability systems.
PACKAGING
MHF+ Triple converters are packaged in hermetically sealed metal cases. MHF+ Triple converters can be purchased in a flanged or non-flanged case. The flanged option provides increased heat dissipation and also provides greater stability when mechanically secured.
CONVERTER DESIGN
MHF+ Triple Series of DC/DC converters incorporate dual-phase, phase-shifted technology with a continuous flyback topology. This design eliminates a minimum load requirement on the main output and eliminates cross regulation effects between the main output voltage and the auxiliary output voltages. The phase-shifted design offers a further benefit in reduced input and output ripple.
INHIBIT FUNCTION
An open collector, TTL compatible, inhibit terminal (pin 1) provides shut-down and start-up control. Applying a logic level low (<0.8 V), referenced to input common, will disable the output of the converter. When inhibited input current is reduced to 5 mA or less and there is no generation of switching noise. The inhibit terminal typically sinks 3 mA when the converter is inhibited. Leaving the terminal open or pulling it high will enable the converter. Use an open collector interface for logic high voltages of up to 11 volts. (Refer to Figure 2 for a connection diagram.) An open collector interface is not required if the logic high is in excess of the open circuit voltage of the inhibit terminal, 11 volts, but less than 40 volts.
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Page 2 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
SIMPLIFIED SCHEMATIC DIAGRAMS
5 H
Positive Input
2 F
Positive Output
Inhibit
PWM Controller IC
ID FET Driver Limit Ref.
Input Common
FIGURE 2: MHF+ SINGLE OUTPUT BLOCK DIAGRAM
Output Common
POSITIVE INPUT
0
FEEDBACK ISOLATOR
+5 OUTPUT
PWM CM CONTROLLER
OUTPUT COMMON INPUT COMMON
FEEDBACK ISOLATOR
+ AUX. OUTPUT
SYNC
PWM CM CONTROLLER
180
-AUX. OUTPUT
FIGURE 1: MHF+ TRIPLE OUTPUT BLOCK DIAGRAM
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Page 3 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
CONNECTION DIAGRAMS
MHF+ Triple
POSITIVE INPUT
9
10 k
INHIBIT
1
1N4148 2N3501
200 pF
10 K 3.9 K
8
INPUT COMMON
FIGURE 5: INHIBIT INTERFACE
9 0.01 28V 5.1k 1 8 F 7
Positive Input Sync In Inhibit Input Common
+5 Output 2 + Aux. Output 4 Output Common 3 - Aux. Output 5 - Aux. Load + Aux. Load
+5 Load
If the sync terminal ([pin 7) is not used, it must be left floating. The ac coupling shown will prevent sync signal failure.
FIGURE 6: AC COUPLING OF SYNC SIGNAL
1
Positive Input
Positive Output
2
9
Positive Input
28V
FMH-461 EMI FILTER
5 Input Common Output Common 4 3 Case* 8
MHF+ TRIPLE
Input Common 6
Chassis Ground
*The case ground connection should be as low an impedance as possible to minimize EMI. Direct contact of baseplate to chassis ground provides the lowest impedance.
FIGURE 7: EMI FILTER CONNECTION
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Page 4 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range Single and dual models: * 16 to 40 VDC continuous * 50 V for up to 50 msec transient Triple models: * 16 to 48 VDC continuous * 80 V for up to 120 msec Output Power * 12 to 15 watts depending on model Power Dissipation (Pd) * 6 watts single and dual, 12 watts triple Lead Soldering Temperature (10 sec per pin) * 300C Storage Temperature Range (Case) * -65C to +150C Case Operating Temperature (Tc) * -55C to +125C full power * -55C to +135C absolute Derating Output Power/Current * Linearly from 100% at 125C to 0% at 135C Output Voltage Temperature Coefficient * 100 ppm/C typical * 150 ppm/C maximum Input to Output Capacitance * 60 pF typical Current Limit * 115% of full load typical (130% typical triple) Isolation * 100 megohm minimum at 500 V Audio Rejection * 50 dB typical Conversion Frequency (55C to +125C Tc) * Free run 550 kHz typical (375 minimum, 500 kHz maximum triple) * External sync range 480 kHz min, 620 kHz max(400 to 600 kHz triple) Inhibit Pin Voltage (unit enabled) * 8.5 to 12 V, 10 V typical Undervoltage Lockout * 14 V input typical
SYNC AND INHIBIT
Sync In (500 to 600 kHz single and dual, 400 to 600 kHz triple) * Duty cycle 40% to 60% * Logic low 0.8 V max * Logic high 4 V min, 5 V max * If not used, connect to input common (on triple models, leave unconnected) * Referenced to input common Sync Out - Referenced to input common Inhibit: TTL Open Collector * Logic low (output disabled) Logic low voltage 0.8 V max Inhibit pin current 4.0 mA max (3.0 typ, 5.0 max triple models) * Referenced to input common Logic high (output enabled) Open collector or unconnected (single and dual) Unconnected or 11 to 40 V (triple)
MECHANICAL AND ENVIRONMENTAL
Size (maximum) Non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm) Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm) See cases E1, E2, G1 and G2 for dimensions. Weight (maximum) Single and dual models: 30 grams typical Triple models: 32 grams typical Screening Standard, ES or 883 (Class H). See "883, Class H, QML Products - Element Evaluation" and "883, Class H, QML Products - Environmental Screening" for more information.
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Page 5 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
PIN OUT Pin 1 2 3 4 5 6 7 8 9 Single Output (Except MHF+2828S) Inhibit No connection Output Common Positive Output Sync Case Ground Input Common Positive Input -- MHF+2828S Inhibit Positive Output (See note 1, below) Output Common Sync Case Ground Input Common Positive Input -- Dual Output Inhibit Positive Output Output Common Negative Output Sync Case Ground Input Common Positive Input -- Triple Output Inhibit Main (+5 V) Output Output Common Pos. Aux. Output Neg. Aux. Output Case Ground Sync In Input Common Positive Input
1. Pin 3 of MHF+2828S will provide 14 Vout referenced to output common (pin 4).
PINS NOT IN USE
Inhibit single, dual and triple models, pin 1 MHF+2828S, pin 3 Sync single and dual models, pin 5 Sync In triple models, pin 7 Leave unconnected Leave unconnected Connect to input common Leave unconnected
Dot on top of cover indicates pin one.
Squared corner and dot on top of package indicate pin one.
1
2
3
4
5
1
2
3
4
5
BOTTOM VIEW MHF+ SINGLE AND DUAL NON-FLANGED OR FLANGED
8 7 6 9
BOTTOM VIEW MHF+ Triple
8 7 6
Dotted line outlines flanged package option. Dotted line outlines flanged package option.
See cases E1 and E2 for dimensions. See cases E2 and G2 for dimensions.
FIGURE 3: MHF+ SINGLE AND DUAL PIN OUT
FIGURE 4: MHF+ TRIPLE PIN OUT
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Page 6 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
MODEL NUMBERING KEY
MHF+ 28 12 D Base Model Input Voltage Output Voltage (R = decimal point, 3R3 = 3.3 Vout; Main and aux. Vout for triple models) Number of Outputs (S = single, D = dual, T = Triple) Case Option (Non-flanged case has no designator in this position) Screening (Standard screening has no designator in this position.) F / 883
SMD NUMBERS
STANDARD MICROCIRCUIT DRAWING (SMD) 5962-0251001HXC 5962-9213901HXC 5962-0325301HXC 5962-9166401HXC 5962-9160101HXC 5962-9689801HXC 5962-9555901HXC 5962-9214401HXC 5962-9161401HXC 5962-9560101HXC 5962-9560201HXC MHF+ SIMILAR PART MHF+283R3S/883 MHF+2805S/883 MHF+285R2S/883 MHF+2812S/883 MHF+2815S/883 MHF+2828S/883 MHF+2805D/883 MHF+2812D/883 MHF+2815D/883 MHF+28512T/883 MHF+28515T/883
Flanged SMDs have the suffix HZC instead of HXC. For exact specifications for an SMD product, refer to the SMD drawing. SMDs can be downloaded from http://www.dscc.dla.mil/programs/smcr
Model Selection
MHF+28 Base model
Vout value
number of outputs
case option
screening
Choose one from each of the following rows Vout value Number of outputs Case option Screening singles: 3R3,5,5R2,12,15,28 S (single), D (dual) or T (triple) non-flanged, leave blank standard screening, leave blank F - flanged /ES (ES screening), /883 (Class H, QML) duals: 5,12,15 triples*: 512 or 515
"R" = decimal point, 3R3 = 3.3VDC
* for triple models "5" indicates the main voltage, "12" or"15" indicate the auxiliary voltages.
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Page 7 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT1 CONDITION VIN = 16 to 40 VDC VIN = 16 to 40 VDC 10 kHz - 2 MHz Tc = -55C to +125C Vin = 16 to 40 VDC NO LOAD TO FULL CONTINUOUS TRANSIENT 50 ms NO LOAD INHIBITED 10 kHz - 10 MHz Tc = -55C to +125C SHORT CIRCUIT POWER DISSIPATION RECOVERY2 50% - 100% - 50% TRANSIENT RECOVERY2 16 - 40 - 16 VDC TRANSIENT3 RECOVERY2 DELAY OVERSHOOT4 CAPACITIVE LOAD
MHF+283R3S MIN 3.27 0 0 -- -- -- -- 16 -- -- -- -- -- 70 -- -- -400 -- -800 -- -- -- TYP MAX 3.30 3.33 -- 2.4 -- 30 50 5 20 28 -- 25 5 45 -- 75 5 7.5 150 150 550 0.8 10 200 8 80 800 100 50 40 50 40 12 80 120 -- 8 30 400 300 800 1.2 25 300 300
MHF+2805S MIN 4.95 0 0 -- -- -- -- 16 -- -- -- -- -- 75 -- -- -400 -- -800 -- -- -- TYP MAX 5.00 5.05 -- 2.4 -- 30 60 5 20 28 -- 25 5 35 -- 77 3.5 7.5 150 150 550 0.8 10 100 12 80 100 50 50 40 50 40 12 80 100 -- 6 30 400 300 800 1.2 25 600 300
MHF+285R2S MIN 5.16 0 0 -- -- -- -- 16 -- -- -- -- -- 75 -- -- -400 -- -800 -- -- -- TYP MAX 5.20 5.24 -- 2.4 -- 30 60 5 20 28 -- 25 5 35 -- 77 3.5 7.5 150 150 550 0.8 10 100 12.48 50 100 35 35 40 50 42 12 80 120 -- 6 30 400 300 800 1.2 25 600 300 mA mApp % W ms mV pk s mV pk ms ms mV pk F UNITS VDC A W mV p-p mV mV VDC V
STEP LOAD RESP.
STEP LINE RESP.
START-UP
Notes 1. Indefinite short circuit protection not guaranteed above 125C (case) 2. Recovery time is measured from application of the transient to the point at which Vout is within regulation.
3. Input step transition time >10 s. 4. Input step transition time <100 s.
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Page 8 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT CONDITION VIN = 16 to 40 VDC VIN = 16 to 40 VDC 10 kHz - 2 MHz Tc = -55C to +125C Vin = 16 to 40 VDC NO LOAD TO FULL CONTINUOUS TRANSIENT 50 ms NO LOAD FULL LOAD INHIBITED 10 kHz - 10 MHz Tc = -55C to +125C SHORT CIRCUIT POWER DISSIPATION RECOVERY2 50% - 100% - 50% TRANSIENT RECOVERY2 16 - 40 - 40 VDC TRANSIENT3 RECOVERY2 DELAY OVERSHOOT4
MHF+2812S MIN TYP MAX 11.88 12.00 12.12 0 -- 1.25 0 -- -- -- -- 16 -- -- -- -- -- -- 78 -- -- -500 -- -800 -- 0 0 -- 30 50 5 20 28 -- 25 680 5 35 -- 79 3.5 7.5 150 150 550 0.8 10 15 80 120 50 50 40 50 50 752 12 80 120 -- 6 30 500 300 800 1.2 25
MHF+2815S MIN TYP MAX 14.85 15.00 15.15 0 -- 1.00 0 -- -- -- -- 16 -- -- -- -- -- -- 78 -- -- -600 -- -800 -- 0 0 -- 30 50 5 20 28 -- 25 670 5 35 -- 80 3.5 7.5 200 150 550 0.8 10 15 80 120 50 50 40 50 62 752 12 80 120 -- 6 30 600 300 800 1.2 25
MHF+2828S MIN TYP MAX 27.72 28.00 28.28 0 -- 0.54 0 -- -- -- -- 16 -- -- -- -- -- -- 82 -- -- -800 -- -- 60 100 50 50 28 -- 25 640 5 35 -- 84 3.5 7.5 600 200 15 120 180 150 150 40 50 60 760 12 80 120 -- 6 30 800 400 UNITS VDC A W mV p-p mV mV VDC V mA
INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT1
mA pp % W ms mV pk s mV pk ms ms mV pk
STEP LOAD RESP.
STEP LINE RESP.
-1200 1100 1200 -- 0.8 1.2 0 0 10 200 25 280
START-UP
200 1200
200 1500
Notes 1. Indefinite short circuit protection not guaranteed above 125C (case) 2. Recovery time is measured from application of the transient to point at which Vout is within regulation.
3. Input step transition time >10 s. 4. Input step transition time <100 s.
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Page 9 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE CONDITIONS +VOUT -VOUT OUTPUT CURRENT1 OUTPUT POWER1 OUTPUT RIPPLE VOLTAGE VOUT LINE REGULATION Vin = 16 to 40 VDC LOAD REGULATION VIN = 16 to 40 VDC VIN = 16 to 40 VDC 10 kHz - 2 MHz Tc = -55C to +125C BALANCED +VOUT LOAD -VOUT -VOUT BALANCED +VOUT LOAD CROSS REGULATION2 INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT MIN 4.95 4.92 -- -- -- -- -- -- -- -- -- 16 -- -- -- -- -- -- 77 -- -- -600 -600 -- -800 -- -- 0
MHF+2805D TYP 5.00 5.00 1.2 -- 30 60 5 -- 20 -- 6 28 -- 20 540 6 20 40 79 3 7.5 200 150 150 600 0.8 12 100 MAX 5.05 5.08 1.92 12 80 120 50 80 50 100 7.5 40 50 40 600 12 50 80 -- 6 30 600 600 500 800 1.2 20 250 MIN 11.88 11.82 -- -- -- -- -- -- -- -- -- 16 -- -- -- -- -- -- 76 -- -- -600 -600 -- -750 -- -- 0
MHF+2812D TYP 12.00 12.00 0.625 -- 30 60 5 -- 20 -- 3 28 -- 25 645 5 35 50 83 3 7.5 300 100 200 550 0.8 12 200 MAX 12.12 1218 1.125 15 80 120 50 100 50 100 6 40 50 50 754 12 60 100 -- 6 50 600 600 400 750 1.2 25 750 MIN 14.85 14.78 -- -- -- -- -- -- -- -- -- 16 -- -- -- -- -- -- 76 -- -- -600 -600 -- -750 -- -- 0
MHF+2815D TYP 15.00 15.00 0.500 -- 30 50 5 -- 20 -- 3 28 -- 25 638 5 35 50 84 3 7.5 300 100 200 550 0.8 12 200 MAX 15.15 15.23 0.900 15 80 120 50 100 50 100 6 40 50 50 754 12 60 100 -- 6 50 600 600 500 750 1.2 25 750 s mV pk ms ms mV pk % VDC V mA mV A W mV p-p mV UNITS VDC
NEGATIVE VOUT CONTINUOUS TRANSIENT 50 msec NO LOAD FULL LOAD INHIBITED 10 kHz - 10 MHz Tc = -55C to +125C SHORT CIRCUIT3 POWER DISSIPATION RECOVERY4 50% - 100% - 50% +VOUT TRANSIENT -VOUT RECOVERY4 16 - 40 - 40 VDC TRANSIENT6 RECOVERY4 DELAY OVERSHOOT7
INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT
mA p-p % W ms
STEP LOAD RESP.5 BALANCED LOADS
mV pk
STEP LINE RESP. VOUT START-UP
Notes 1. Up to 13.5 watts, 90% (9.6W, 80% for 2805D) of the total output power is available from either output providing the opposite output is simultaneously carrying 10% (20% for 2805D) of the total output power. Each output must carry a minimum of 10% (20% for 2805D) of the total output power in order to maintain regulation on the negative output. 2. Effect on -Vout for the following conditions: +Po = 50% to 10% and -Po = 50% +Po = 50% and -Po = 50% to 10%
3. Indefinite short circuit protection not guaranteed above 125C (case) 4. Recovery time is measured from application of the transient to point at which Vout is within regulation. 5. Response of either output with the opposite output held at half of the total output power. 6. Input step transition time >10 s. 7. Input step transition time <100 s.
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Page 10 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
TRIPLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE CONDITION MAIN + AUXILIARY - AUXILIARY OUTPUT CURRENT2 MAIN + AUXILIARY - AUXILIARY TOTAL OUTPUT POWER3 MAIN + AUXILIARY - AUXILIARY TOTAL OUTPUT RIPPLE VOLTAGE LINE REGULATION4 VIN = MIN. TO MAX. LOAD REGULATION4, 5 CROSS REGULATION6 INPUT VOLTAGE 10 kHz to 2 MHz 10 kHz to 2 MHz MAIN AUXILIARY MAIN AUXILIARY - AUXILIARY CONTINUOUS TRANSIENT 120 ms1 INPUT CURRENT NO LOAD -55 - +25C NO LOAD +125C INHIBITED4 INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT7 POWER DISSIPATION MAIN4 AUXILIARY TRANSIENT MAIN AUXILIARY RECOVERY MAIN RECOVERY AUX. DELAY EACH OUTPUT -- -- -- -- -- -- -- -- -- -- -- 5 2 10 12 12 850 950 8 3 25 -- -- -- -- -- -- -- -- -- -- -- 5 2 10 12 12 850 950 8 3 25 W 10 kHz to 10 MHz MAIN AUXILIARY MIN 4.95 11.64 11.64 0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 16 -- -- -- -- -- 74 MHF+28512T TYP 5.0 12.0 12.0 -- -- -- -- -- -- -- -- 20 30 25 120 25 120 -- 28 -- 20 30 3 20 76 MAX 5.05 12.36 12.36 1.5 0.416 0.416 2.125 7.5 5 5 15 60 90 75 240 75 240 600 48 80 35 45 5 50 -- MIN 4.95 14.55 14.55 0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 16 -- -- -- -- -- 74 MHF+28515T TYP 5.0 15.0 15.0 -- -- -- -- -- -- -- -- 20 30 25 150 25 150 -- 28 -- 20 30 3 20 76 MAX 5.05 15.45 15.45 1.5 0.333 0.333 2.0 7.5 5 5 15 60 112 75 300 75 300 600 48 80 35 45 5 50 -- mA p-p % mA mV VDC V mV mV p-p mV W A VDC UNITS
STEP LOAD RESPONSE4, 8, 9
mV pk ms ms
START-UP4
Notes 1. Guaranteed, not tested 2. The sum of the 12 volt auxiliary output currents may not exceed 625 mA. The sum of the 15 volt auxiliary output currents may not exceed 500 mA. 3. The sum of the auxiliary output power may not exceed 7.5 watts. 4. Case temperature -55C to +125C. 5. Load regulation for the +5 is specified at 0.0 to 1.5 A with the aux. both held at 3.76 W (313 mA for the 12, 250 mA for the 15). Load regulation for the aux. is specified as both aux. from 0.0 to 3.76 W (313 mA for 12, 250 mA for 15) at the same time with the +5 held at 1.5 A.
6. Cross regulation only occurs between the two auxiliaries and is measured on -aux. +5 is held constant at 1.0 A. Cross regulation is specified for two conditions: Negative aux.= 3.76 W; positive aux.= 0.37 W to 3.76 W. Negative aux. = 0.37 W to 3.76 W; positive aux. = 3.76 W. 7. Load fault = <0.05 . 8. Transition time is 2 - 10 s. 9. Time to settle to within 1% of Vout final value.
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Page 11 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Typical Performance Curves: 25C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
90 16V 80
90
80
16V
80
16V
EFFICIENCY (%)
EFFICIENCY (%)
70 40V 28V 60
70 40V 60
EFFICIENCY (%)
28V
70 40V 60 28V
50
50
50
40
2
4
6
8
10
12
40
2
4
6
8
10
12
14 15
40
2
4
6
8
10
12
14 15
OUTPUT POWER (Watts)
MHF+2805S EFFICIENCY
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
MHF+2812S EFFICIENCY
MHF+2815S EFFICIENCY
FIGURE 8
FIGURE 9
FIGURE 10
90 16V 80
90 16V 80
90 16V 80
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
70 40V 60 28V
70 40V 60 28V 50
70 40V 60 28V 50
50
40
40 2 4 6 8 10 12
40 2 4 6 8 10 12 14 15
2
4
6
8
10
12
14
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
MHF+2805D EFFICIENCY
MHF+2812D EFFICIENCY
MHF+2815D EFFICIENCY
FIGURE 11
FIGURE 12
FIGURE 13
0 -10
ATTENUATION (dB)
500mV/div.
-20 -30 -40 -50 -60 -70 -80 -90 -100 0.1 1 10 100
VOUT
100% to 50%
100mV/div.
50% to 100%
20V/div.
VIN
FREQUENCY (kHz)
1ms/div 16V TO 40V
MHF+ SERIES AUDIO REJECTION
MHF+2805S STEP LINE RESPONSE
50s/div 50% 100%
MHF+2805S STEP LOAD RESPONSE
FIGURE 14
FIGURE 14
FIGURE 15
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Page 12 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Typical Performance Curves: 25C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
20V/div.
100% to 10%
100mV/div.
200mV/div. 20V/div.
POUT= 12W
VIN
+VOUT
10% to 100%
1V/div.
VOUT
VIN
200s/div 10% 100%
2 ms/div
1 ms/div 16V TO 40V
MHF+2805S STEP LOAD RESPONSE
MHF+2805S TURN-ON INTO FULL LOAD
MHF+2815D STEP LINE RESPONSE
FIGURE 16
FIGURE 17
FIGURE 18
100% to 50%
PO= 7.5 W
PO= 7.5 W -VOUT 100% to 20%
100mV/div.
100mV/div.
5V/div.
+VOUT
20% to 100%
20V/div.
50s/div 20% 100% MHF+2815D +VOUT STEP LOAD RESPONSE
50% to 100%
VIN
50s/div 50% 100% MHF+2815D +VOUT STEP LOAD RESPONSE
2 ms/div
MHF+2815D TURN-ON INTO FULL LOAD
FIGURE 19
FIGURE 20
FIGURE 21
10
-VOUT VOLTAGE CHANGE (%)
10
8 6
2805D 2812D COND A
16 MHF+2805S&D
-V OUT VOLTAGE CHANGE (%)
5 2812D 2815D 0
INPUT VOLTAGE (Volts)
4 2 0 -2 -4 -6 -8 10 20
15
2815D COND B 2812D 2805D 30 40 50
14
-5 2805D
13
MHF+2812S&D MHF+2815S&D
-10
0
20
40
60
80
100
-10
12 10
11
12
13
14
15
POSITIVE OUTPUT LOAD (% OF TOTAL LOAD) -VOUT WITH SHIFT IN LOAD BALANCE
CROSS REGULATION
OUTPUT LOAD (%) COND. A: 50% LOAD +V; 50% to 10% -V COND. B: 50% LOAD -V; 50% to 10% +V
OUTPUT POWER (Watts) 50 mV DROP
LOW LINE DROPOUT VS. LOAD
MHF+2805D/MHF+2812D/MHF+2815D CROSS REGULATION
FIGURE 22
FIGURE 23
FIGURE 24
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Page 13 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
Typical Performance Curves: 25C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
80 75 EFFICIENCY
75 EFFICIENCY 28 V 70 65 60 55 28 V 48 V
200 mV / div.
16 V
80
16 V
5 VDC
70 65 60 55 48 V
500 mV / div.
+15 VDC -15 VDC
2
4
6
8
10
12
14
16
2
4
6
8
10
12
14
16
OUTPUT POWER (W)
OUTPUT POWER (W)
5 ms / div. INPUT V: 16 TO 40 VDC, 15 = 250 mA EACH, +5 = 1.5 A
MHF+28512T EFFICIENCY
MHF+28515T EFFICIENCY
MHF+ 28515T STEP LINE RESPONSE
MHF+28512T has a similar response
FIGURE 25
10 V / div. 10 V / div. VIN
FIGURE 26
10 V / div. VIN
FIGURE 27
VIN
INPUT GND 2 V / div. +5 VDC
INPUT GND 2 V / div. 5 V / div. +5 VDC
+12 VDC
+5 GND 5 ms / div.
+5 GND 5 ms / div.
-12 VDC
5 ms / div.
MHF+28512T TURN ON INTO FULL LOAD MAIN
MHF+28515T has a similar response
MHF+28512T TURN ON INTO FULL LOAD MAIN
MHF+28515T has a similar response
MHF+28512T TURN ON INTO FULL LOAD AUXILIARIES
MHF+28515T has a similar response
FIGURE 28
11.5 11 INPUT VOLTAGE 10.5 10 MHF+28512T 9.5 9 8.5 2 4 6 8 10 12 14 16 MAXIMUM OUTPUT POWER (W) MHF+28515T
FIGURE 29
FIGURE 30
LOW LINE DROPOUT
FIGURE 31
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Page 14 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converter Cases
28 VOLT INPUT - 15 WATT
BOTTOM VIEW CASE E1
Seam Seal
Projection Weld
1.130 max. (28.70) 0.960 (24.38)
Squared corner and dot on top of case indicate pin one.
1 0.030 dia. (0.76) 0.030 dia. (0.76)
2
3
4
5
8 0.160 (4.06) 0.000 0.330 max. (8.38)
7
6
Seal hole: 0.080 0.002 (2.03 0.05)
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. Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold compression glass seal
Case E1, Rev C, 20060111 Please refer to the numerical dimensions for accuracy. All 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. Copyright (c) 1999-2006 Interpoint Corp. All rights reserved.
FIGURE 32: CASE E1-- SINGLE AND DUAL MODELS
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Page 15 of 20 Rev K - 20060613
1.460 max. (37.08)
0.505 (12.83)
0.705 (17.91)
0.905 (22.99)
1.105 (28.07)
0.205 (5.21)
0.330 max (8.38)
0.25 (6.35)
0.25 (6.35)
0.000
0.000
0.000
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converter Cases
28 VOLT INPUT - 15 WATT
BOTTOM VIEW CASE E2
Seam Seal Projection Weld
1.130 max. (28.70) 0.960 (24.38) 1 0.030 dia. (0.76) 2 3 4 5
Squared corner and dot on top of case indicate pin one.
9 0.160 (4.06) 0.000
8
7
6
Seal Hole: 0.080 0.002 (2.03 0.05)
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 Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold compression glass seal
Case E2, Rev C, 20060111 Please refer to the numerical dimensions for accuracy. All 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. Copyright (c) 1999-2006 Interpoint Corp. All rights reserved.
FIGURE 33: CASE E2 -- TRIPLE MODELS
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Page 16 of 20 Rev K - 20060613
1.460 max. (37.08)
0.330 max (8.38)
0.25 (6.35)
0.330 max (8.38)
0.25 (6.35)
0.205 (5.21)
0.000
0.000
0.000
0.505 (12.83)
0.705 (17.91)
0.905 (22.99)
1.105 (28.07)
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converter Cases
28 VOLT INPUT - 15 WATT
BOTTOM VIEW CASE G1 Flanged cases: Designator "F" required in Case Option position of model number
Seam Seal Projection Weld Squared corner and dot on top of case indicate pin one.
0.960 (24.38) 0.030 dia. (0.76) 0.030 dia. (0.76)
1
2
3
4
5 0.128 dia (3.25)
0.560 (14.22) 8 7 6
0.160 (4.06) 0.000 0.330 max. (8.38) 0.25 (6.35) 0.330 max. (8.38) 0.25 (6.35) 0.140 (3.56) 0.000 0.000 0.000
0.205 (5.21)
0.505 (12.83)
0.705 (17.91)
0.905 (22.99)
Seal hole: 0.080 0.002 (2.03 0.05)
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.
Case G1, Rev B, September 23, 2005 Please refer to the numerical dimensions for accuracy. All 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. Copyright (c) 1999-2005 Interpoint Corp. All rights reserved.
FIGURE 34: CASE G1 -- SINGLE AND DUAL MODELS
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Page 17 of 20 Rev K - 20060613
1.105 (28.07)
1.590 (40.39)
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converter Cases
28 VOLT INPUT - 15 WATT
BOTTOM VIEW CASE G2 Flanged cases: Designator "F" required in Case Option position of model number
Seam Seal Projection Weld
1.130 max. (28.70) 0.960 (24.38) 1 0.030 dia. (0.76) 0.560 (14.22) 9 8 7 6 2 3 4 5 0.128 dia (3.25)
Squared corner and dot on top of case indicate pin one.
0.160 (4.06) 0.000 0.330 max. (8.38) 0.330 max. (8.38) 0.000 0.25 (6.35) 0.000 0.25 (6.35) 0.140 (3.56) 0.000
0.205 (5.21)
0.505 (12.83)
0.705 (17.91)
0.905 (22.99)
1.105 (28.07)
1.590 (40.39)
Seal hole: 0.080 0.002 (2.03 0.05)
Flange thickness: 0.047 (1.19)
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
2.005 max (50.93)
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. Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold compression glass seal
Case G2, Rev C, 20060111 Please refer to the numerical dimensions for accuracy. All 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. Copyright (c) 1999-2006 Interpoint Corp. All rights reserved.
FIGURE 34: CASE G2 -- TRIPLE MODELS
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Page 18 of 20 Rev K - 20060613
2.005 max. (50.93)
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
883, CLASS H, QML PRODUCTS - ELEMENT EVALUATION
ELEMENT EVALUATION TEST PERFORMED (COMPONENT LEVEL) Element Electrical (probe) Element Visual Internal Visual Final Electrical Wire Bond Evaluation4 SLAMTM/C-SAM: Input Capacitors only (Add'l test, not req. by H or K) STANDARD (NON-QML)1 M/S2 P3 yes no no no no no no no no no no no CLASS H, QML 2 M/S P3 yes yes yes yes yes no yes yes no yes yes yes
Definitions: Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534 SLAMTM: Scanning Laser Acoustic Microscopy C-SAM: C - Mode Scanning Acoustic Microscopy Notes: 1. Non-QML products do no meet all of the requirements of MIL-PRF-38534 2. M/S = Active components (Microcircuit and Semiconductor Die) 3. P = Passive components 4. Not applicable to EMI filters that have no wire bonds
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Page 19 of 20 Rev K - 20060613
Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT - 15 WATT
883, CLASS H, QML PRODUCTS - ENVIRONMENTAL SCREENING
TEST 125C STANDARD non-QML 125C /ES non-QML Class H /883 QML
Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. C, -65C to 150C, ambient Method 1010, Cond. B, -55C to 125C, ambient Constant Acceleration Method 2001, 3000 g Method 2001, 500g Burn-In Method 1015, 160 hours at 125C case, typical 96 hours at 125C case, typical Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 through 6: -55C, +25C, +125C case Subgroups 1 and 4: +25C case Hermeticity Test 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.
MHF+ Single, Dual and Triple. Rev K- 20060613. 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. MHF+ Series is a trademark of Interpoint. Copyright (c) 1994 - 2006 Interpoint Corporation. All rights reserved. www.craneae.com
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