CRANE MHE2812DES

FEATURES
• –55°C to +85°C 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 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 (case H6) inches
(53.98 x 28.58 x 12.57 mm)
Flanged 2.910 x 1.125 x 0.495 (case K7) inches
(73.91 x 28.58 x 12.57 mm)
See Section B8, cases H6 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 Series™ 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 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 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 Series converters ideal for either
battery or aircraft power applications.
An inhibit function is provided on MHE 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 Series
converters against short circuits.
MHE Series converters are rated to operate at full load up to a case
temperature of 85°C, with the output power derated linearly to zero
at 115°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, etc.) should be brought into contact
with the converter’s baseplate.
When the MHE 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 flangemount option be used. This option provides improved thermal
transfer capabilities as well as a mechanically secure mounting
configuration.
1
MHE SERIES
20 WATT
DC/DC CONVERTERS
INHIBIT
ABSOLUTE MAXIMUM RATINGS
TYPICAL CHARACTERISTICS
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V
• Referenced to input common
• Logic high (output enabled)
Open collector
Output Power
• 10 to 20 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –55°C to +125°C
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
Continuous
• 17 to 40 VDC MHE28XXX
• 10 to 16 VDC MHE12XXX
Transient
• 50 V for 50 msec on 28 V input models
Case Operating Temperature (Tc)
• –55°C to +85°C full power
Derating Output Power/Current
• Linearly from 100% at 85°C to 0% at 115° C
• MHE28XXX models derate by 33% at 16 Vin
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
• 8 to 10 V MHE12XXX
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MHE12XX MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE
CONDITION
MHE1212S
MHE1215S
–55°C TO +85°C
TYP
5.00
—
MAX
5.05
3
MIN
11.88
—
TYP
12.00
—
MAX
12.12
1.25
MIN
14.85
—
TYP
15.00
—
–55°C TO +85°C
—
—
15
—
—
15
—
—
MAX UNITS
15.15 VDC
1.0
A
15
W
0 TO 1 MHz
—
35
70
—
35
70
—
35
70
mV p-p
LINE REGULATION
VIN MIN TO MAX
—
2
5
—
3
10
—
3
10
mV
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
—
10
—
10
12
—
20
16
—
—
10
—
5
12
—
15
16
—
—
10
—
10
12
—
20
16
—
mV
VDC
V
NO LOAD
—
—
24
—
—
32
—
—
32
mA
10 kHz – 2 MHz
—
78
30
81
80
—
—
79
30
82
80
—
—
80
30
83
80
—
mA p-p
%
INPUT CURRENT
INPUT RIPPLE
CURRENT
EFFICIENCY
Note:
1. Guaranteed by design, not tested.
2
MHE1205S
MIN
4.95
—
MHE SERIES
20 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin (12 Vin for 12 V models), 100% load, unless otherwise specified.
SINGLE AND DUAL MHE28XX MODELS
PARAMETER
CONDITIONS
OUTPUT VOLTAGE
OUTPUT CURRENT2
–55 TO +85°C
OUTPUT POWER2
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
INPUT CURRENT
INPUT RIPPLE
CURRENT
EFFICIENCY
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
UNITS
VDC
A
–55 TO +85°C
—
—
15
—
—
20
—
—
20
—
—
15
—
—
15
W
0 - 1 MHz
VIN MIN TO MAX
—
—
35
2
60
10
—
—
60
3
80
10
—
—
30
3
60
10
—
—
30
3
50
12
—
—
30
3
50
15
mV p-p
mV
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
—
17
—
—
10
28
—
—
20
40
50
18
—
17
—
—
5
28
—
—
15
40
50
30
—
17
—
—
5
28
—
—
15
40
50
30
—
17
—
—
5
28
—
—
15
40
50
35
—
17
—
—
5
28
—
—
15
40
50
35
mV
VDC
V
mA
10 kHz - 2 MHz
—
78
20
81
50
—
—
79
25
82
50
—
—
80
25
83
50
—
—
76
25
79
50
—
—
76
25
79
50
—
mA p-p
%
Note
1. Guaranteed by design, not tested.
2. On dual output models at least 25% of the load should be on the positive output.
3
MHE SERIES
20 WATT
DC/DC CONVERTERS
PIN OUT
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
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
7
6
BOTTOM VIEW
MHE
10
9
8
Dotted line outlines flanged package option.
See Section B8, case H6 and K7 for dimensions.
FIGURE 1: PIN OUT
MODEL NUMBERING KEY
MHE
28 12 S
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)
Screening
(Standard screening has no designator
in this position.)
OUTPUT ADJUSTMENT RESISTOR VALUES
FOR MHE2805S AND MLP2805S
Resistance
Pin 3 to 4
∞
390K
145K
63K
22K
0
Output Voltage
Increase (%)
0
+1%
+2%
+3%
+4%
+5%
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.
4
MHE Series Rev D 20060630
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 is a trademark of Interpoint Corporation.
Copyright © 1995 - 2006 Interpoint Corporation. All rights reserved.
CASES
Dot on top of case indicates pin one
CASE H
BOTTOM VIEW
See Figures 29 – 34
for pin configurations.
1.125 max
(28.58)
2.125 max
(53.98)
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 H
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
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
Squared corner and dot on top
of case indicate pin one.
0.040 dia
(1.02)
1.110 (28.19)
0.955 (24.26)
1
2
3
0.555 (14.1)
5
4
0.155 (3.94)
2.090
(53.01)
1.845
(46.86)
0.245
(6.22)
0.000
0.25 ±0.03
(6.4 ±0.8)
0.000
0.400 max.
(10.16)
0.000
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
CASES
CASE H
BOTTOM VIEW CASE H5
FMA-461and FMB-461 EMI Filter: Screening – Standard of ES
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.120 (28.45)
0.960 (24.38)
1
0.040 dia
(1.02)
2
3
0.560 (14.22)
Solder Tip-off
5
4
0.160 (4.06)
2.110
(53.59)
1.855
(47.12)
0.255
(6.48)
0.000
0.25 +0.05/-0.00
(6.4 +1.3/-0.0)
0.495 max (12.57)
0.000
0.000
FIGURE 33: CASE H5
BOTTOM VIEW CASE H6
MHE Series: Screening – Standard or ES
HR151 Series and HR152 Series: no screening options
Dot on top of case indicates pin one
Solder Seal
1.120 (28.45)
1
2
3
4
5
10
9
8
7
6
0.655
(16.64)
1.055
(26.80)
0.040 dia
(1.02)
0.255
(6.48)
0.960 (24.38)
Solder Tip-off
0.160 (4.06)
2.110
(53.59)
1.855
(47.12)
1.455
(36.96)
0.000
0.25 +0.05/-0.00
(6.4 +1.3/-0.0)
0.000
0.495 max (12.57)
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 300°C for 10 seconds
per pin.
FIGURE 41: CASE K MAXIMUM DIMENSIONS
B8-26
CASES
CASE K
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
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.115 (28.32)
0.955 (24.26)
1
0.040 dia
(1.02)
2
0.162 dia
(4.11)
3
0.555 (14.1)
Solder Tip-off
5
4
0.155 (3.94)
2.320
(58.93)
2.090
(53.01)
1.845
(46.86)
0.245
(6.22)
0.000
0.230
(5.84)
0.25 ±0.03
(6.4 ±0.8)
0.495 max (12.57)
0.000
0.000
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
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.115 (28.32)
1
2
3
4
5
10
9
8
7
6
0.245
(6.22)
0.645
(16.38)
1.045
(26.54)
1.445
(36.70)
0.955 (24.26)
0.040 dia
(1.02)
0.555 (14.1)
Solder Tip-off
0.155 (3.94)
FIGURE 48: CASE K7
B8-30
2.320
(58.93)
1.845
(46.86)
0.000
– 0.230
(5.84)
0.25 ±0.03
(6.4 ±0.8)
0.000
0.495 max (12.57)
0.000
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 Series
MRH Series
MTO Series
MSR Series
FM/FMA/FMB EMI Filters
MSF EMI Filter
C2-12