MHF2812D [CRANE]
DC/DC CONVERTERS 28 VOLT INPUT; DC / DC转换器， 28伏特的输入
| 型号： | MHF2812D |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 文件： | 总6页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
• –55° to +125°C operation
MHF SERIES
12 WATT
DC/DC CONVERTERS
• 16 to 40 VDC input
(19 to 40 VDC for 15 volt outputs)
• Fully Isolated
28 VOLT
INPUT
MODELS
• Optocoupler feedback
VDC OUTPUT
• Fixed frequency 600 kHz typical
• Forward converter topology
• 50 V for up to 50 ms transient protection
• Inhibit function
SINGLE
DUAL
±12
5
12
15
±15
• Indefinite short circuit protection
3
• Up to 83% efficiency, 22 W/in
Size (max.): 1.460 x 1.130 x 0.330 inches (37.08 x 28.70 x 8.38 mm)
See Section B8, case E1 for dimensions.
Weight:
Screening: Standard or ES.
See section C2 for screening options.
21 grams typical.
DESCRIPTION
elements on both the input and output to help reduce the need for
external components. For information about filtering to meet MIL-
STD-461’s CE03 test, contact your Interpoint representative.
The MHF Series™ of DC/DC converters offer up to 12 watts of
power from single or dual outputs in a single package over a the full
military temperature range. Thick film hybrid manufacturing tech-
nology produces high levels of miniaturization, giving the MHF
Series converters a low profile (0.330 inch), small board area (1.65
WIDE VOLTAGE RANGE
3
square inches), and high power density (22 watt/in ).
The MHF Series is designed to provide full power operation over the
input voltage range of 16 to 40 volts. The 15 volt models provide a
19 to 40 volt range. Operation below 16 volts (or 19 volts for the 15
volt models), including operation in MIL-STD-704E emergency
power conditions, is possible with derated output power. Please
refer to the low line drop-out graphs, Figures 9 and 10.
The parts are packaged in hermetically sealed steel enclosures,
making them ideal for use in military, aerospace, and high reliability
industrial applications.
DESIGN METHODOLOGY
The MHF converters are switching regulators which use a quasi-
square wave, single ended forward converter design with a nominal
switching frequency of 600 kHz. Isolation between input and output
circuits is provided with a transformer in the forward power loop and
a temperature insensitive optical link in the feedback control loop.
Output regulation is accomplished with constant frequency pulse
width modulation. Both line and load regulation are typically within
10 mV.
MILITARY TEMPERATURE RANGE
The MHF Series provides full power operation at case temperatures
from –55°C up to +125°C. All 12 and 15 volt models in both single
and dual output configurations provide full power operation at
+125°C with derated power to 135°C. The +5 volt model provides
full power at 110°C derated to 0% at 130°C. Depending on operating
levels, air flow, and ambient temperature; heat sinking may be
required.
On dual output models, the positive output is independently regu-
lated and the negative output is cross-regulated. Figures 7 and 8
illustrate what effects load changes have on the negative output.
INHIBIT FEATURE
An inhibit terminal is provided that can be used to disable internal
switching, resulting in a very low quiescent input current. An open
collector TTL compatible low (≤0.8V) is required to control the inhibit
function. This level may be supplied by an open collector gate since
the inhibit pin is provided with an internal pull-up resistor.
Indefinite short circuit protection and overload protection are
provided by sensing output load current and restricting the output
current to approximately 125% of full load output current. Since the
output current is sensed in the secondary stage, the result is a
predictable, constant output current control with no foldback char-
acteristics. MHF converters are provided with internal filtering
B2-77
MHF SERIES
12 WATT
DC/DC CONVERTERS
INHIBIT
TYPICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low 0.8 V max
Inhibit pin current 4 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector
Output Voltage Temperature Coefficient
• 150 ppm/°C, typical
Input to Output Capacitance
• 50 pF, typical
Current Limit
• 125% of full load, typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• 600 kHz typical
• 16 to 40 VDC (19 to 40 VDC 15 volt output)
Output Power
• 12 watts (10 watts MHF2805S)
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –55°C to +135°C
RECOMMENDED OPERATING CONDITIONS
Inhibit Pin Voltage (unit enabled)
• 8 to 11 V
Input Voltage Range
• 16 to 40 VDC continuous
• 19 to 40 VDC 15 volt outputs continuous
• 50 V for 50 msec transient
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +110°C full power for MHF2805S
• –55°C to +135°C absolute
• –55°C to +130°C absolute for MHF2805S
Derating Output Power/Current
• Linearly from 100% at 125°C to 0% at 135°C
• Linearly from 100% at 110°C to 0% at 130°C
for MHF2805S
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
MHF2805S
MHF2812S
TYP MAX
MHF2815S
MIN TYP MAX
CONDITIONS
MIN
4.95
—
TYP
5.0
—
MAX
MIN
11.88
—
UNITS
VDC
A
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
5.05
2.0
10
60
50
50
40
50
30
483
3
12
—
—
30
10
10
28
—
20
—
2
12.12
1.0
12
14.85
—
15
—
—
25
10
10
28
—
20
—
2
15.15
0.8
12
MIN. TO MAX. V
—
—
—
—
W
IN
10 kHz to 2 MHz
MIN. TO MAX. V
—
40
10
10
28
—
—
60
—
50
mV p-p
mV
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
—
—
50
—
50
IN
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
—
—
50
—
50
mV
16
—
16
—
40
19
—
40
VDC
V
50
50
INPUT CURRENT
—
20
—
—
30
—
30
FULL LOAD
—
—
557
3
—
535
3
mA
INHIBITED
—
2
—
—
INPUT RIPPLE
CURRENT
10 kHz TO 2 MHz
—
135
77
180
—
—
150
81
200
—
—
150
83
220
—
mA p-p
%
EFFICIENCY
74
77
80
1
LOAD FAULT
POWER DISSIPATION
OVERLOAD
—
—
—
—
–
5
—
—
—
—
—
80
5
—
—
—
—
—
5
2
W
SHORT CIRCUIT
DELAY
3.5
300
2.8
200
START-UP
Notes
180
150
250
ms
1. Indefinite short circuit protection not guaranteed above 125°C case temperature (110°C case for MHF2805S).
B2-78
MHF SERIES
12 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
MHF2812D
TYP
MHF2815D
TYP
CONDITION
MIN
11.88
11.82
—
MAX
12.12
12.18
1.0
MIN
14.85
14.77
—
MAX
15.15
15.23
0.8
UNITS
OUTPUT VOLTAGE
+V
12.0
12.0
0.5
—
15.0
15.0
0.4
—
OUT
VDC
– V
OUT
1, 2
OUTPUT CURRENT
A
2
OUTPUT POWER
+V
—
10.8
10.8
12
—
10.8
10.8
12
OUT
– V
—
—
—
—
W
OUT
TOTAL
—
—
—
—
OUTPUT RIPPLE
VOLTAGE
10 kHz TO 2 MHz
—
—
30
5
60
50
—
—
30
5
60
50
mV p-p
mV
LINE REGULATION
MIN. TO MAX. V
IN
+V
OUT
LOAD REGULATION
NO LOAD TO FULL
CROSS REGULATION
+V
—
—
—
16
—
5
5
50
10
5
—
—
—
19
—
10
4
50
8
mV
%
OUT
3
20% TO 80% LOAD
4
50% LOAD
4
3
5
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
CONTINUOUS
28
—
40
50
28
—
40
50
VDC
V
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
—
—
—
25
—
35
550
3
—
—
—
25
—
35
536
3
mA
1.9
1.9
INPUT RIPPLE
CURRENT
10 kHz TO 2 MHz
—
175
81
240
—
—
175
83
240
—
mA p-p
%
EFFICIENCY
78
80
5
LOAD FAULT
POWER DISSIPATION
SHORT CIRCUIT
OVERLOAD
—
—
—
—
—
2.8
5
—
—
—
—
—
2
5
W
START-UP
DELAY
150
250
150
250
ms
Notes
1. Applies to both outputs.
4. 50% load on the positive output and 50% to 20% load on the negative output.
2. Maximum combined output power is 12 watts. A maximum of 90% is avail-
able from either output.
50% load on the negative output and 50% to 20% load on the positive output.
See Figure 7.
3. 20% to 80% load on the positive output and 80% to 20% on the negative
output. See Figure 8.
5. Indefinite short circuit protection not guaranteed above 125°C case temper-
ature.
PIN OUT
Squared corner and dot on
top of cover indicate pin one.
MODEL NUMBER KEY
Pin
1
Single Output
Inhibit
Dual Output
Inhibit
MHF 28 12 D / ES
Base Model
2
No connection
Positive Output
Input Voltage
3
Output Common Output Common
Output Voltage
1
8
2
3
4
5
6
4
Positive Output
No connection
Case Ground
Input Common
Positive Input
Negative Output
No connection
Case Ground
Input Common
Positive Input
Number of Outputs
(S = single, D = dual)
5
BOTTOM VIEW
MHF
6
Screening
(Standard screening has no designator
in this position.)
7
8
7
See Section B8, case E1, for dimensions.
FIGURE 1: PIN OUT
B2-79
MHF SERIES
12 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, unless otherwise specified.
90
80
70
60
50
90
80
70
60
50
90
80
70
60
50
16V
19V
16V
40V
40V
28V
40V
28V
28V
10
2
4
6
8
10 12 14
2
6
8
12
14
4
2
4
6
8
10 12 14
Output Power (Watts)
MHF2805S Efficiency
FIGURE 2
Output Power (Watts)
MHF2812S Efficiency
FIGURE 3
Output Power (Watts)
MHF2815S Efficiency
FIGURE 4
90
80
70
60
50
90
80
70
60
50
10
8
19V
16V
6
Cond. A
2812D
4
40V
40V
2
0
2815D
28V
28V
2
–4
–6
–8
–10
2812D
Cond. B
2
4
6
8
10 12 14
0
10
2
30
40
50
2
4
6
8
10 12 14
Output Power (Watts)
Output Load (%)
Output Power (Watts)
Condition A: 50% Load Pos. Vout, 50% to 20% Neg. Vout
Condition B: 50% Load Neg. Vout, 50% to 20% Pos. Vout
MHF Negative Output Voltage
MHF2815D Efficiency
MHF2812D Efficiency
Cross Regulation
FIGURE 6
FIGURE 5
FIGURE 7
20
15
19
18
17
16
15
14
13
12
11
19
18
2815S
10
17
2815D
16
5
0
15
14
2815D
2812S
2805S
–5
2812D
–10
–15
–20
13
2812D
12
11
0
20
40
60
80
100
2
4
6
8
10 12 14
2
4
6
8
10 12 14
Output Load (%)
Output Power (Watts)
50 mV Drop
Output Power (Watts)
50 mV Drop
Positive Output 20% to 80% Load
Negative Output 80% to 20% Load
MHF Single Low Line Dropout
MHF Dual Low Line Dropout
MHF Dual Negative Output Voltage
Cross Regulation
FIGURE 8
FIGURE 9
FIGURE 10
218211-001-DTS Rev A
DQ# 1011
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 © 1992 - 1999 Interpoint. All rights reserved.
B2-80
CASE E
CASES
Squared corner and dot on top
of case indicate pin one.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
CASE E
Cold Rolled Steel/Nickel/Gold)
#52 alloy/Gold
compression glass seal
BOTTOM VIEW
See Figures 16 – 18
for pin configurations.
Pins
1.130 max
(28.70)
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
1.460 max
(37.08)
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 15: CASE E MAXIMUM DIMENSIONS
BOTTOM VIEW CASE E1
MHF+ Series Single and Dual: Screening – Standard, ES, or 883
MHF Series and LIM5050 Module: Screening – Standard or ES
SMHF Series Single and Dual and SLIM5050 Module:
Screening – Space Standard, H, or K
HR120 Series: No screening options
Projection Weld
Seam Seal
Squared corner and dot on top
of case indicate pin one.
0.960
(24.38)
1
2
3
4
5
0.030 dia.
(0.76)
8
7
6
0.160
(4.06)
0.000
FIGURE 16: CASE E1
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.
B8-10
QA SCREENING
125°C PRODUCTS
125°C PRODUCTS
TEST (125°C Products)
STANDARD
/ES
/883 (Class H)*
PRE-CAP INSPECTION
Method 2017, 2032
yes
yes
yes
TEMPERATURE CYCLE (10 times)
Method 1010, Cond. C, -65°C to 150°C
Method 1010, Cond. B, -55°C to 125°C
no
no
no
yes
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
Method 2001, 500 g
no
no
no
yes
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
96 hours at 125°C case (typical)
no
no
no
yes
yes
no
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C
Subgroups 1 and 4: +25°C case
no
yes
no
yes
yes
no
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
Gross Leak, Dip (1 x 10 )
no
no
yes
yes
yes
no
yes
yes
no
-3
FINAL VISUAL INSPECTION
Method 2009
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
*883 products are built with element evaluated components and are 100% tested and guaranteed over
the full military temperature range of –55°C to +125°C.
Applies to the following products
MOR Series
MFLHP Series
MFL Series
MHP Series
MTR Series
MQO Series**
MHD Series
MHV Series
MHF+ Series
MHF Series**
MGA Series
MSA Series
MGH Series
MCH Series
FM-704A EMI Filter
FMD**/FME EMI Filter
FMC EMI Filter
FMH EMI Filter
FMGA EMI Filter
FMSA EMI Filter
HUM Modules**
LCM Modules**
LIM Modules
**MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer
‘883” screening.
C2-10
相关型号：
©2020 ICPDF网 联系我们和版权申明