HR701-285 [CRANE]
DC/DC CONVERTERS 28 VOLT INPUT; DC / DC转换器， 28伏特的输入
| 型号： | HR701-285 |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 文件： | 总9页 (文件大小：121K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
• –40°C to + 85°C operation
HR700 SERIES
70 WATT
DC/DC CONVERTERS
28 VOLT NPUT
• 19 to 40 VDC input
• Fully Isolated
I
• Optocoupler feedback
• Fixed frequency, 245 kHz typical
• Topology – Push-Pull Forward
• 50 V for up to 50 ms transient protection
• Inhibit/sync function
MODELS
VDC OUTPUT
SINGLE
DUAL
±12
±15
TRIPLE
+5 & ±12
+5 & ±15
5
12
15
• Indefinite short circuit protection
• Remote sense on single models
• Up to 84% efficiency
Size (max.): 3.20 x 2.46 x 0.595 inches
(81.3 x 62.5 x 15.11 mm)
See Section B8, case L, for dimensions.
140 grams typical
Screening: Standard only.
See Section B9 for screening description.
Weight:
DESCRIPTION
provided by detecting peak primary switching current on a cycle
basis and limiting it to approximately 130% of the full load input
current. This method results in quick and positive current limiting
under short circuit conditions.
HR700 Series DC/DC converters offer up to 70 watts of power from
single, dual, or triple outputs in one package. The converters
combine the small size and high reliability of hybrid-based compo-
nents, the high efficiency of switching regulators, and the isolation,
regulation, and low noise characteristics of linear regulators.
HR700 Series DC/DC converters are designed to provide full power
operation over the input voltage range of 19 to 40 VDC. Operation
below an input of 19 volts is possible with derated output power.
Outputs are available as 5, 12, and 15 VDC single, dual and triple
outputs. The converters typically provide greater than 80% effi-
ciency over the entire input range. Line regulation is typically within
0.1% and load regulation within 0.2%.
SMALL SIZE
The HR700 converters are manufactured using techniques that
provide very small size and low profile components. Each converter
uses less than eight square inches of board areas and is 0.595
inches high or less. The overall power density is 20 watts per cubic
inch.
LOW NOISE
The HR700 Series converters offer low noise on both the input and
output lines. A two section, four pole, LC input filter is included to
provide very low reflected line ripple current. Output ripple is main-
tained at less than 50 mV p-p for single and dual models and 85 mV
p-p for triple output models.
HIGH RELIABILITY
Assembled using thick-film technology, the HR700 parts use the
same manufacturing procedures and quality controls that we apply
to converters designed for commercial airliners, the space shuttle,
advanced fighter aircraft, and other high reliability applications. The
steel cases are hermetically sealed in a dry nitrogen environment
-3
INHIBIT/SYNC FEATURE
and are guaranteed a maximum leak rate of less than 10 atm-
cc/sec. All devices are 100% electrically tested.
An inhibit/sync pin is standard on all models of the HR700 Series
converters. The pin serves as both an output inhibit and as a
synchronization input. In the inhibit mode an open collector TTL
compatible low (<0.8 V) will disable internal switching thereby
inhibiting the unit’s output. Inhibiting in this manner results in an
extremely low quiescent current.
HIGH PERFORMANCE
The HR700 series parts are high efficiency, low noise, pulse-width
modulated converters which use a quasi-square wave forward
converter design with a nominal switching frequency of 245 kHz.
Isolation between input an output is provided with a transformer in
the forward power loop and a wide band, temperature insensitive,
optical link in the feedback control loop. Short circuit protection is
B4-33
HR700 SERIES
70 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATINGS
SYNC AND INHIBIT
TYPICAL CHARACTERISTICS
Output Power
Sync In (245 to 370 kHz.)
• Duty cycle 70% min, 98% max.
• Logic low 0.8V max
Output Voltage Temperature Coefficient
• 150 ppm/°C, typical
Input to Output Capacitance
• 160 pF, typical
• 60 to 70 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
• Logic high 4.5 V min
Storage Temperature Range (Case)
• –55°C to +125°C
• Referenced to input common
• If sync is not used, leave unconnected
Inhibit TTL Open Collector
• Logic low (output disabled)
Inhibit pin current 1 mA max
• Referenced to input common
• Logic high (output enabled)
V = ≥ 4.5V
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• Free run mode 245 kHz, typical
Inhibit Pin Voltage (unit enabled)
• 4.5 to 5.5 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 19 to 40 VDC continuous (see Derating)
Case Operating Temperature (Tc)
• –40°C to +85°C full power
DERATING OUTPUT POWER/CURRENT AND INPUT VOLTAGE
Temperatures are referenced to the temperature at the converter’s baseplate
• Linearly derate output power/current from 100% at 85°C to 0% at 125°C.
• Above 105°C linearly derate steady state input voltage to 33 volts at 125°C.
• Indefinite short circuit protection is not guaranteed above 85°C case.
• Operation below an input voltage of 19 volts, including operation in MIL-
STD-704E emergency power conditions, is possible with derated output
power. See Figures 10 and 11.
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUTS
PARAMETER
HR701-2805
HR701-2812
HR701-2815
CONDITION
MIN TYP MAX
MIN TYP MAX
MIN. TYP MAX
UNITS
OUTPUT
VOLTAGE
FULL LOAD
4.90 5.00
5.10
12.00
60
11.75 12.00 12.25
14.75 15.00 15.25
VDC
OUTPUT
CURRENT
V
= 19 TO 40
IN
—
—
—
—
—
—
30
10
—
—
—
—
—
—
30
10
5.83
70
—
—
—
—
—
—
30
10
4.67
70
A
W
OUTPUT
POWER
Tc = –55°C TO +85°C
OUTPUT
RIPPLE
FULL LOAD BW ≤ 2 MHz
100
30
100
30
100
30
mV p-p
mV
LINE
REGULATION
V
= 19 TO 40
IN
LOAD
REGULATION
NO LOAD TO FULL
—
10
28
30
40
—
10
28
30
40
—
10
28
30
40
mV
INPUT
VOLTAGE
19
19
19
VDC
INPUT
CURRENT
NO LOAD
INHIBITED
—
—
75
30
100
35
—
—
70
30
100
35
—
—
70
30
100
35
mA
INPUT REFL.
RIPPLE
FULL LOAD
BW ≤10 MHz
—
10
50
—
10
50
—
10
50
mA p-p
EFFICIENCY
77
—
80
5
—
80
—
83
8
—
80
—
83
8
—
%
STARTUP
DELAY
WITH LOW
IMPEDANCE SOURCE
10
10
10
ms
B4-34
HR700 SERIES
70 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL AND TRIPLE OUTPUTS
HR702-2812
HR702-2815
HR703-28512
HR703-28515
PARAMETER
CONDITION
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT
VOLTAGE
FULL
LOAD
MAIN
DUAL
—
—
—
—
—
—
4.90
5.05
5.15
4.90
4.95
5.10
VDC
±11.75 ±12.00 ±12.25 ±14.75 ±15.00 ±15.25 ±11.50 ±11.80 ±12.10 ±15.05 ±15.30 ±15.75
OUTPUT
CURRENT
V
=
MAIN
DUAL
—
—
—
2.92
—
5.5
—
—
—
2.33
—
4.4
—
—
4.0
1.67
10.0
4.2
—
—
4.0
1.33
10.0
3.33
IN
19 TO 40
A
1, 2
MAIN
±DUAL
TOTAL
—
—
—
—
35
—
—
66.5
70
—
—
—
—
35
—
—
66.5
70
—
—
—
20
20
—
50
50
60
—
—
—
20
20
—
50
50
60
OUTPUT
POWER
W
1, 2
OUTPUT
RIPPLE
FULL LOAD
BW ≤ 2 MHz
MAIN
DUAL
—
—
—
30
—
100
—
—
—
30
—
100
—
—
50
50
100
100
—
—
50
50
100
100
mV p-p
mV
LINE
V
=
MAIN
DUAL
—
—
—
—
—
—
—
—
—
—
2
25
—
—
2
25
IN
REGULATION 19 TO 40
3
10
30
10
30
100
225
100
225
LOAD
NO LOAD
MAIN
DUAL
—
—
—
25
—
50
—
—
—
25
—
50
—
—
5
480
30
750
—
—
5
300
30
600
mV
REGULATION TO FULL
4
CROSS
DUAL
REGULATION +P = 3 W TO 35 W
O
–P = 35 W
O
—
—
1.5
2.0
3.0
4.0
—
—
1.5
2.0
3.0
3.5
—
—
—
—
—
—
—
—
—
—
—
—
%
+P = 20 W TO 50 W
O
–P = 50 W TO 20 W
O
5
CROSS
MAIN +P = 30 W
O
REGULATION DUAL
+P
–P
=
=
3 W TO 27 W
27 W TO 3 W
O
O
—
—
—
—
—
—
—
2.3
6.0
—
2.3
5.0
MAIN
%
+P = 3 W TO 30 W
O
DUAL ±P = 15 W
O
—
—
—
—
—
—
—
5.4
28
9.0
40
—
5.0
28
7.0
40
INPUT
VOLTAGE
19
28
40
19
28
40
19
19
VDC
mA
INPUT
CURRENT
NO LOAD
INHIBITED
—
—
75
25
100
35
—
—
75
25
100
35
—
—
85
30
115
35
—
—
60
30
115
35
INPUT REFL.
RIPPLE
FULL LOAD
BW ≤10 MHz
—
15
50
—
15
50
—
15
50
—
15
50
mA p-p
EFFICIENCY
80
—
83
15
—
80
—
83
15
—
79
—
84
6
—
79
—
84
6
—
%
STARTUP
DELAY
25
25
10
10
ms
Notes
1. On dual output models the maximum combined output power is 70 watts.
A maximum of 95% (66.5 W) is available from any single output.
2. On triple output models the maximum combined output power is 60 watts.
A maximum of 50 watts is available from a single output.
3. Balanced loads
4. Regulation effect on the negative dual output during the defined conditions.
5. Regulation effect on both dual outputs during the defined conditions.
B4-35
HR700 SERIES
70 WATT
DC/DC CONVERTERS
THERMAL MANAGEMENT
CALCULATING MAXIMUM AMBIENT TEMPERATURE
The HR700 Series of DC/DC converters has an upper operating
temperature of + 85°C at the baseplate of the case. The degree of
heat sinking required to remain within this limit may be determined
from Figure 1 which shows the maximum allowed internal power
HEAT SINK RECOMMENDATIONS
An HR700 Series converter in still air (other than convective
currents) and with no conductive cooling paths other than through
electrical connections at the pins will exhibit a thermal resistance of
approximately 4°C / watt. In cases where this value proves to be too
high it is recommended that additional heat sinking be supplied. The
simplest method of accomplishing this is to firmly attach the
converter to a PCB thereby providing a conductive thermal path.
Secondly it is recommended that airflow be provided over the
converter. Although each situation requires a thorough thermal
analysis these two measures can reduce the thermal resistance to
as low as 2°C / watt. If calculations indicate further heat sinking is
required it is recommended that additional thermal mass be
provided either under the base plate or on top of the converter's
mounting flanges or both.
dissipation (P
vs. ambient temperature for various heat sink
DISS
thermal resistances. P
may be calculated as:
DISS
P
= P
/ efficiency – P
DISS
OUT OUT
The efficiency for all combinations of P
and V for the various
IN
OUT
models may be obtained from the graphs on the preceding pages.
Example: Converter = HR702-2815, T = 70°C,
AMB
V
= 28 VDC, P
= 45 watts
IN
OUT
Efficiency = 85% (From Figure 7)
= (45 / 85) – 45 = 7.95 watts
P
DISS
From Figure 1 we can see that this situation will require thermal
resistance of approximately 4.5°C / watt.
Conversely we may also find the maximum ambient temperature
which can be tolerated if we know the heat sink thermal resistance.
Example: Converter = HR701-2805, V = 28 VDC, P
IN
= 45 W.
OUT
Thermal Resistance = 3°C / watt.
Efficiency = 83.5% (From Figure 3)
P
= (45 / 0.835) – 45 = 8.89 watts.
DISS
From Figure 1 we can see that the maximum allowed ambient
temperature is approximately 75°C.
20
15
10
5
20° 40° 60° 80° 100° 120° 140°
Degrees Centigrade
Internal Power Dissipation (max)
vs. Ambient Temperature
FIGURE 1
B4-36
HR700 SERIES
70 WATT
DC/DC CONVERTERS
PIN OUT
Squared corner indicates pin one.
1
2
3
4
Pin
1
Single Output
Positive Input
Case Ground
Input Common
Inhibit/Sync In
Dual Output
Positive Input
Case Ground
Input Common
Inhibit/Sync In
Triple Output
Positive Input
2
Case Ground
3
Input Common
Inhibit/Sync In
4
5
Negative Sense Negative Output
Positive Sense Positive Output
Negative Aux. Output
Positive Aux. Output
BOTTOM VIEW
HR700
6
7, 8
Output Common Output Common Output Common
9, 10 Positive Output
No Connection
Main (+5) Output
See Section B8, case L, for dimensions.
9
7
8
5
10
6
FIGURE 2: PIN OUT
MODEL NUMBERING KEY
HR70
2 - 28 12
Base Model
Number of Outputs
(1 = single, 2 = dual, 3 = triple)
Input Voltage
Output Voltage
(Main and aux. Vout for triple models)
B4-37
HR700 SERIES
70 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
86
85
84
83
82
81
80
79
78
89
88
87
86
85
84
83
82
81
89
88
87
86
85
84
83
82
81
20 V
19 V
19 V
28 V
28 V
28 V
40 V
40 V
40 V
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
HR701-2805
EFFICIENCY VS. LINE & LOAD
HR701-2812
EFFICIENCY VS. LINE & LOAD
HR701-2815
EFFICIENCY VS. LINE & LOAD
FIGURE 3
FIGURE 4
FIGURE 5
87
85
83
81
79
77
75
73
71
87
85
83
81
79
77
75
73
71
87
85
83
81
79
77
75
73
71
19 V
19 V
19 V
28 V
28 V
28 V
40 V
40 V
40 V
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
HR703-28512
EFFICIENCY VS. LINE & LOAD
HR702-2815
EFFICIENCY VS. LINE & LOAD
HR702-2812
EFFICIENCY VS. LINE & LOAD
FIGURE 7
FIGURE 8
FIGURE 6
19
18
17
16
15
87
19 V
HR702-2815
HR702-2812
18
17
16
15
HR701-2815
85
83
81
79
77
75
73
71
28 V
HR701-2812
HR701-2815
HR703-28512
HR703-28515
40 V
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
LOW LINE DROPOUT VS
LOAD (50mV DROP)
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
LOW LINE DROPOUT VS LOAD
(50mV DROP)
10 20 30 40 50 60 70
OUTPUT POWER (WATTS)
HR703-28515
EFFICIENCY VS. LINE & LOAD
FIGURE 9
FIGURE 10
FIGURE 11
20621-009-DTS Rev A
DQ# 2008
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
B4-38
or specifications without notice. HR700 Series is
a trademark of Interpoint.
Copyright © 1992 - 1999 Interpoint. All rights reserved.
CASE L
CASES
0.060 min
(1.52)
CASE L
TOP VIEW
Cover Placement
and
Min/Max Dimensions
See Figure 50
for pin configuration
3.20 max (81.3)
0.060 min
(1.52)
2.46 max (62.5)
0.337 min
(8.56)
0.337 min
(8.56)
Squared corner indicates pin one
Materials
Header Cold Rolled Steel/Nickel/Tin
Cover Cold Rolled Steel/Nickel/Tin
Pins
#52 alloy pins 1-4, and 9-10
#52 alloy with copper core pins 5-8
ceramic 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 49: CASE L MAXIMUM DIMENSIONS
B8-31
CASE L
CASES
CASE L
MFW Series: Screening – Standard or ES
HR700 Series: no screening options
Squared corner indicates pin one
Solder Seal
0.141 x 6
(3.58)
2.850 (72.39)
1
2
3
4
.0.040 +0.005/-0.002
(1.02 +0.13/-0.05)
BOTTOM VIEW
1.600 (40.64)
9
7
8
5
Solder Tip-off
0.550 (13.97)
0.350 (8.89)
10
6
0.000
FIGURE 50: CASE L DIMENSIONS
B8-32
QA SCREENING
HR PRODUCTS
HR PRODUCTS
TEST (HR products)
PRE-CAP INSPECTION
Method 2017
STANDARD
yes
yes
yes
yes
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 and 4: +25°C case
HERMETICITY TESTING
-3
Gross Leak, Dip (1 x 10 )
FINAL VISUAL INSPECTION
Method 2009
Test methods are referenced to MIL-STD-883 as determined by MIL-
PRF-38534.
Applies to the following products:
HR700 Series
HR300 Series
HR150 Series
HR120 Series
HR40 Series
C2-13
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