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Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
Features parallel operation with current share, up to 5 units (276 watts)
* operating range -55 to +100C * Input voltage 160 to 400 VDC
* Transient protection 450 V for 50 ms * Fully isolated, magnetic feedback * Fixed high frequency switching * Remote sense on single models * Sync In and Sync out
* Inhibit primary side and secondary side
VDC Output
single
MoDELS
* Indefinite short circuit protection
* High power density, up to 85% efficiency
5 12 15 28
Dual
5 12 15
description
The MHP270 SeriesTM DC/DC converters provide up to 65 watts of output power over the full -55C to 100C temperature range. MHP270 models operate from a MIL-STD-704 nominal 270-volt DC power bus - from 160 to 400 VDC continuous operation with surges to 450 volts - and provide isolated outputs at 5, 12, 15, and 28 VDC. Parallel operation for all loading conditions is supported without any requirement for external components. The converters are available with standard screening or "ES" screening MHP270 DC/DC converters are constant frequency, pulse width modulated switching power supplies which use a quasi-square wave, two-switch single-ended forward converter design. Tight load regulation is achieved through a wide-bandwidth magnetic feedback circuit. Up to five single output MHP270 converters may be used in parallel to power a single load by simply connecting the share pins of all units. Units in this configuration have an 85% current sharing accuracy over 35% load to full load conditions. MHP270 Series of converters feature a flexible synchronization scheme in which units may be synchronized to an external clock or to one another by using sync in and sync out pins provided on each unit. MHP270 converters have a nominal switching frequency of 525 kHz, but may be synchronized at any frequency from 475 to 575 kHz.
MHP270 converters meet a wide variety of military/aerospace performance and environmental specifications. Their continuous operation input voltage (160 to 400) meets the normal operating limits of MIL-STD-704. The unit shuts down above approximately 425 volts, but it is rated to withstand a surge of up to 450 volts for 50 msec. The units are built as fully hermetic thick film hybrids in our MIL-PRF-38534 certified facilities.
Features
Undervoltage lock-out - shuts down when the input line voltage falls below approximately 120 VDC to provide smooth initialization. Continuous short circuit protection - current limit set at approximately 125%. Soft-start - controlled start-up at turn-on, release from inhibit and recovery from load fault conditions. Remote sense - to provide automatic compensation for voltage drops on output lines on single output models. VDC
Crane Aerospace & Electronics Electronics Group (Interpoint Brand) POBox97005*RedmondWA98073-9705 425.882.3100*power@crane-eg.com www.interpoint.com
Rev F - 20090304
Page 1 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
Operating COnditiOns and CharaCteristiCs
input Voltage range * 160 to 400 VDC continuous * 450 VDC for 50 msec transient
synC and inhibit
sync *Sync In Input frequency 475 to 575 kHz. Duty cycle 40% min, 60% max Active low 0.8 V max Active high 4.5 V min, 10 V max Referenced to input common *Sync out Referenced to input common
output power * 50 to 65 watts depending on model
lead soldering temperature (10 sec) * 300C storage temperature range (case) * -65C to +150C
current limit * 125% of full load typical
output Voltage temperature coefficient * 100 ppm/C typical
case operating temperature (tc) * -55 to +100C full power
isolation * 100 megohm minimum at 500 V
conversion Frequency * Free run mode 525 kHz typical 475 kHz. min., 575 kHz max * External sync range: 475 to 575 kHz low line drop out *Vout drops 1% of nominal *Input voltage 155 VDC max
inhibit (inH1, inH2) *Active low (output disabled) INH1 referenced to input common Active low 0.8 V max Inhibit pin will source 15 mA max INH2 referenced to output common Active low 0.5 V max Inhibit pin will source 15 mA max * Active high (output enabled) open collector open pin voltage: INH1 = 12V typ, INH2 = 5 V typ
meChaniCal and envirOnmental
size (maximum) * 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm) * See case U for dimensions. Weight (maximum) * 86 grams max
undervoltage lockout * Input voltage 110 VDC min
screening * Standard or ES. See "MHP270 (Standard and /ES, non-QML Products" screening table for more information, page 10.
SINGLE oUTPUT MoDELS CoNNECTIoN DIAGRAM - SENSE
270 V
+ -
1 2 3 4 5 6
Positive Input Input Common INH2 INH1 Sync Out Sync In
Share 12 N/C 11 Pos. Sense 10 9 Sense Return 8 Output Common 7 Positive Output - + RL
Inhibit Sync In
REMOTE SENSE CONNECTION
Figure 1: sense COnneCtiOns
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Rev F - 20090304
Page 2 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
pins not in use
1 2 3 4 5
Pin
Positive Input
Single output
pin out
Dual output
inhibit (inH1, inH2) sync in share sync out
Leave unconnected Leave unconnected
Input Common
Positive Input
Inhibit 2 (INH2) Inhibit 1 (INH1) Sync out Sync In
Input Common
Connect to input common Leave unconnected Must be connected to appropriate outputs
Inhibit 2 (INH2) Inhibit 1 (INH1) Sync out Sync In
sense lines
6 7 8 9 10 11 12
Positive output Sense Return
output Common Positive Sense No connection Share
Positive output
output Common Negative output No connection No connection Share
Angled corner indicates pin one.
1 2 3 4 5 6
12 11
TOP VIEW MHP (Pin side, marked side)
See case U for dimensions.
10 9 8 7
Figure 2: pin Out
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Rev F - 20090304
Page 3 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
SINGLE oUTPUT MoDELS CoNNECTIoN DIAGRAM - PARALLEL
+ 270V -
1 Positive Input
2 Input Common 3 INH2
4 INH1 MHP270 #1 8 5 Sync Out Output Common 6
Pos. Sense 10 Sense Return 9
7
Share 12 N/C 11
Sync In
Positive Output
1 Positive Input 2 Input Common 3 INH2 4 INH1
5 Sync Out 6 Sync In
MHP270 #2
Pos. Sense 10 Sense Return 9 Output Common Positive Output
8 7
Share 12 N/C 11 + - RL
1 Positive Input 2 Input Common
3 INH2 Pos. Sense 4 INH1 MHP270 #N Sense Return 5 Sync Out Output Common 6 Sync In Positive Output
Share 12 N/C 11
10 9 8 7
Figure 3: parallel COnneCtiOns
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Rev F - 20090304
Page 4 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
Model nuMbering key
Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) MHP 270 05 S / ES
Model selection
MHP270 Base model Vout value number of outputs / screening
Choose one from each of the following rows Vout value singles: 5,12,15, 28 duals: 5,12,15 /ES (ES screening)
Number of outputs Screening
S (single) or D (dual)
standard screening, leave blank
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Rev F - 20090304
Page 5 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
Electrical Characteristics: 25C Tc, 270 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE oUTPUT MoDELS
paraMeter Output VOltage Output Current Output pOWer Output ripple line regulatiOn lOaD regulatiOn input VOltage input Current Vin = 160 Vin = 160 10
tO tO
MHP27005S
MIN 4.95 0 0 -- -- -- 160 -- -- -- -- -- 76 TYP 5.00 -- -- -- -- -- 270 -- -- -- -- -- -- -- -- -- MAX 5.05 10 50 50 50 50 400 450 20 8 15 50 -- 30 300 300
MHP27012S
MIN 11.88 0 0 -- -- -- 160 -- -- -- -- -- 81 -- -- -- TYP 12.00 -- -- -- - -- 270 -- -- -- -- -- -- -- -- -- MAX 12.12 5 60 50 120 120 400 450 20 10 15 50 -- 35 700 500
COnDitiOns 400 VDC 400 VDC
units VDC a W mV p-p mV mV VDC V mA
kHz
- 2 MHz
Vin = 160 tO 400 VDC nO lOaD tO Full COntinuOus TRANSIENT 50 msec. 1 nO lOaD inHiBiteD-inH1 inHiBiteD-inH2
input ripple Current eFFiCienCY lOaD Fault step lOaD respOnse
10
kHz
- 10 MHz
mA p-p % W mV pk s
pOWer DissipatiOn sHOrt CirCuit 50% - 100% - 50% transient reCOVerY 2
-- -- --
Notes 1. Unit will shut down above approximately 425V but will be undamaged and will restart when voltage drops into normal range.
2. Recovery time is measured from application of the transient to the point at which Vout is within 1% of final value.
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Rev F - 20090304
Page 6 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
Electrical Characteristics: 25C Tc, 270 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE oUTPUT MoDELS
paraMeter Output VOltage Output Current Output pOWer Output ripple line regulatiOn lOaD regulatiOn input VOltage input Current Vin = 160 Vin = 160 10
tO tO
MHP27015S
MIN 14.85 0 0 -- -- -- 160 -- -- -- -- -- 80 TYP 15.00 -- -- -- -- -- 270 -- -- -- -- -- -- -- -- -- MAX 15.15 4.33 65 75 150 150 400 450 20 7 15 45 -- 45 700 300
MHP27028S
MIN 27.72 0 0 -- -- -- 160 -- -- -- -- -- 80 -- -- -- TYP 28.00 -- -- -- -- -- 270 -- -- -- -- -- -- -- -- -- MAX 28.28 2.32 65 280 280 280 400 450 20 10 15 70 -- 45 1800 1000
COnDitiOns 400 VDC 400 VDC
units VDC a W mV p-p mV mV VDC V mA
kHz
- 2 MHz
Vin = 160 tO 400 VDC nO lOaD tO Full COntinuOus TRANSIENT 50 msec. 1 nO lOaD inHiBiteD-inH1 inHiBiteD-inH2
input ripple Current eFFiCienCY lOaD Fault step lOaD respOnse
10
kHz
- 10 MHz
mA p-p % W mV pk s
pOWer DissipatiOn sHOrt CirCuit 50% - 100% - 50% transient reCOVerY 2
-- -- --
Notes 1. Unit will shut down above approximately 425V but will be undamaged and will restart when voltage drops into normal range.
2. Recovery time is measured from application of the transient to point the point at which Vout is within 1% of final value.
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Rev F - 20090304
Page 7 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
Electrical Characteristics: 25C Tc, 270 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL oUTPUT MoDELS 1
paraMeter Output VOltage Output Current 2 Output pOWer Output ripple VOut
2
MHP27005D Min 4.95 4.92 0 0 -- -- -- -- 160 0 -- -- -- -- 74 -- -- -- tYp 5.00 5.00 5 -- 50 -- -- -- 270 -- -- -- -- -- -- -- -- -- MaX 5.05 5.08 8.0 50 100 100 100 1000 400 450 20 10 15 60 -- 30 300 300 Min
MHp27012D tYp 12.00 12.00 2.5 -- 50 -- -- -- 270 -- -- -- -- -- _ -- -- -- MaX 12.12 12.18 4.0 60 125 120 120 800 400 450 20 10 15 60 -- 35 900 500 Min 11.88 11.82 0 0 -- -- -- -- 160 0 -- -- -- -- 81 -- -- --
MHp28015D tYp 15.00 15.00 2.16 -- 50 -- -- -- 270 -- -- -- -- -- _ -- -- -- MaX 15.15 15.23 3.46 65 125 150 150 750 400 450 20 8 15 60 -- 45 900 500 14.85 14.77 0 0 -- -- -- -- 160 0 -- -- -- -- 82 -- -- --
COnDitiOns +VOut -VOut Vin = 160 Vin = 160 10
tO tO
units VDC a W mV p-p mV mV mV VDC V mA mA p-p % W mV pk s
400 VDC 400 VDC
kHz
- 2 MHz
line regulatiOn VOut
Vin = 160 tO 400 VDC nO lOaD tO Full eFFeCt
On
lOaD regulatiOn 3 VOut input VOltage
CrOss regulatiOn 4
-VOut
COntinuOus TRANSIENT 50 msec.4 nO lOaD inHiBiteD-inH1 inHiBiteD-inH2
input Current input ripple Current eFFiCienCY lOaD Fault step lOaD respOnse VOut
10
kHz
- 10 MHz
BalanCeD lOaD pOWer DissipatiOn sHOrt CirCuit 50% - 100% - 50% 6 transient reCOVerY
7
Notes 1. Share operation not characterized for dual outputs. 2. Up to 80% of the total output power is available from either output provided that the opposite output is simultaneously carrying 20% of the total output power. one of the outputs must always provide a minimum of 20% of the total output power to meet cross regulation. Negative Vout cross regulation is referenced to 50%/50% balanced loads (at 100% of total rated output power - full load). 3. Assumes balanced loads on the outputs.
4. Effect on the negative output from 50%/50% loads to 70%/30% or 70%/30% loads. 5. Unit will shut down above approximately 425V but will be undamaged and will restart when voltage drops into normal range. 6. Second output at 50% 7. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value.
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Rev F - 20090304
Page 8 of 10
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converter cases
270 Volt input - 65 Watt
TOP VIEW CASE U Flanged case, short-leaded
*Case U does not require designator in Case Option position of model number.
Angled corner indicates pin one. 1.505 (38.23) max. 1.380 (35.05) 1.250 (31.75) 1.050 (26.67) 0.850 (21.59) 0.650 (16.51) 0.450 (11.43) 0.250 (6.35) 0.120 (3.05) 0.000 0.000
0.23 (5.8) Lead Length
0.128 dia (3.25). 12 11 10 9 8 7 0.040 dia (1.02)
Seam Seal
1 2 3 4 5 6
0.400 (10.16) max.
2.880 (73.15) 3.005 (76.33) max.
0.120 (3.05) 0.250 (6.35)
2.750 (69.85)
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/Nickel/Gold; compression glass seal
Case U, Rev C, 20060302 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 4: Case u
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Page 9 of 10 Rev F - 20090304
0.050 (1.27) 0.000
0.220 (5.59
Crane Aerospace & Electronics Power Solutions
MHp270 single and dual dc/dc converters
270 Volt input - 65 Watt
MHP270 (Standard and /ES, non-QML) ProductS EnvironMEntaL ScrEEning
test perFOrmed Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. B, -55C to 125C, ambient Constant Acceleration Method 2001, 500 g Burn-in Method 1015, 100C case, typical 96 hours Final Electrical Test MIL-PRF-38534, Group A 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
mhp270 standard nOn-Qml1
yes no no
mhp270 /es nOn-Qml1
yes yes yes
no yes no no yes yes
yes yes yes yes no yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Notes: 1. Standard and /ES, non-QML products, do not meet all of the requirements of MIL-PRF-38534.
MHP270 Single and Dual, Rev F - 20090304. This revision supersedes 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. MHP270 Series is a trademark of Interpoint. Copyright (c) 1999 - 2009 Interpoint Corporation. All rights reserved. www.interpoint.com
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