Interpoint HR701-2812 Dc/dc converters 28 volt input Datasheet

FEATURES
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HR700 SERIES
70 WATT
DC/DC CONVERTERS
28 VOLT INPUT
–40°C to + 85°C operation
19 to 40 VDC input
Fully Isolated
Optocoupler feedback
Fixed frequency, 245 kHz typical
Topology – Push-Pull Forward
50 V for up to 50 ms transient protection
Inhibit/sync function
Indefinite short circuit protection
Remote sense on single models
Up to 84% efficiency
MODELS
VDC OUTPUT
SINGLE
5
12
15
DUAL
±12
±15
TRIPLE
+5 & ±12
+5 & ±15
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.
Weight:
140 grams typical
Screening: Standard only.
See Section B9 for screening description.
DESCRIPTION
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 components, the high efficiency of switching regulators, and the isolation,
regulation, and low noise characteristics of linear regulators.
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.
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
and are guaranteed a maximum leak rate of less than 10-3 atmcc/sec. All devices are 100% electrically tested.
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
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 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% efficiency over the entire input range. Line regulation is typically within
0.1% and load regulation within 0.2%.
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 maintained at less than 50 mV p-p for single and dual models and 85 mV
p-p for triple output models.
INHIBIT/SYNC FEATURE
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.
B4-33
HR700 SERIES
70 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATINGS
Output Power
• 60 to 70 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
• 19 to 40 VDC continuous (see Derating)
Case Operating Temperature (Tc)
• –40°C to +85°C full power
SYNC AND INHIBIT
TYPICAL CHARACTERISTICS
Sync In (245 to 370 kHz.)
• Duty cycle 70% min, 98% max.
• Logic low 0.8V max
• Logic high 4.5 V min
• 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
Output Voltage Temperature Coefficient
• 150 ppm/°C, typical
Input to Output Capacitance
• 160 pF, typical
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
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 MILSTD-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
HR701-2812
HR701-2815
CONDITION
MIN
TYP
MAX
MIN
OUTPUT
VOLTAGE
FULL LOAD
4.90
5.00
5.10
11.75 12.00 12.25
OUTPUT
CURRENT
VIN = 19 TO 40
—
—
12.00
—
—
5.83
—
—
4.67
A
OUTPUT
POWER
Tc = –55°C TO +85°C
—
—
60
—
—
70
—
—
70
W
OUTPUT
RIPPLE
FULL LOAD BW ≤ 2 MHz
—
30
100
—
30
100
—
30
100
mV p-p
TYP MAX
MIN.
TYP
MAX
14.75 15.00 15.25
UNITS
VDC
LINE
REGULATION
VIN = 19 TO 40
—
10
30
—
10
30
—
10
30
mV
LOAD
REGULATION
INPUT
VOLTAGE
INPUT
CURRENT
NO LOAD TO FULL
—
10
30
—
10
30
—
10
30
mV
19
28
40
19
28
40
19
28
40
VDC
—
—
75
30
100
35
—
—
70
30
100
35
—
—
70
30
100
35
mA
mA p-p
INPUT REFL.
RIPPLE
EFFICIENCY
STARTUP
DELAY
B4-34
HR701-2805
PARAMETER
NO LOAD
INHIBITED
FULL LOAD
BW ≤10 MHz
WITH LOW
IMPEDANCE SOURCE
—
10
50
—
10
50
—
10
50
77
80
—
80
83
—
80
83
—
%
—
5
10
—
8
10
—
8
10
ms
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
PARAMETER
OUTPUT
VOLTAGE
HR702-2812
CONDITION
FULL
LOAD
OUTPUT
VIN =
CURRENT1, 2 19 TO 40
MIN
MAIN
DUAL
HR702-2815
MAX
—
—
—
±11.75 ±12.00 ±12.25
MIN
TYP
HR703-28512
MAX
MIN
TYP
HR703-28515
MAX
MIN
TYP
MAX
—
—
—
4.90
5.05
5.15
4.90
4.95
5.10
±14.75 ±15.00 ±15.25 ±11.50 ±11.80 ±12.10 ±15.05 ±15.30 ±15.75
UNITS
VDC
—
—
—
2.92
—
5.5
—
—
—
2.33
—
4.4
—
—
4.0
1.67
10.0
4.2
—
—
4.0
1.33
10.0
3.33
A
—
—
—
—
35
—
—
66.5
70
—
—
—
—
35
—
—
66.5
70
—
—
—
20
20
—
50
50
60
—
—
—
20
20
—
50
50
60
W
MAIN
DUAL
—
—
—
30
—
100
—
—
—
30
—
100
—
—
50
50
100
100
—
—
50
50
100
100
mV p-p
LINE
VIN =
REGULATION 19 TO 40
MAIN
DUAL
—
—
—
10
—
30
—
—
—
10
—
30
—
—
2
100
25
225
—
—
2
100
25
225
mV
NO LOAD
LOAD3
REGULATION TO FULL
MAIN
DUAL
—
—
—
25
—
50
—
—
—
25
—
50
—
—
5
480
30
750
—
—
5
300
30
600
mV
DUAL
CROSS4
REGULATION +PO = 3 W TO 35 W
–PO = 35 W
—
1.5
3.0
—
1.5
3.0
—
—
—
—
—
—
—
2.0
4.0
—
2.0
3.5
—
—
—
—
—
—
—
—
—
—
—
—
—
2.3
6.0
—
2.3
5.0
OUTPUT
POWER1, 2
OUTPUT
RIPPLE
MAIN
DUAL
TYP
MAIN
±DUAL
TOTAL
FULL LOAD
BW ≤ 2 MHz
+PO = 20 W TO 50 W
–PO = 50 W TO 20 W
MAIN +PO = 30 W
CROSS5
REGULATION DUAL
+PO = 3 W TO 27 W
–PO = 27 W TO 3 W
MAIN
+PO = 3 W TO 30 W
DUAL ±PO = 15 W
INPUT REFL.
RIPPLE
%
—
—
—
—
—
—
—
5.4
9.0
—
5.0
7.0
19
28
40
19
28
40
19
28
40
19
28
40
VDC
NO LOAD
INHIBITED
—
—
75
25
100
35
—
—
75
25
100
35
—
—
85
30
115
35
—
—
60
30
115
35
mA
FULL LOAD
BW ≤10 MHz
—
15
50
—
15
50
—
15
50
—
15
50
mA p-p
INPUT
VOLTAGE
INPUT
CURRENT
%
EFFICIENCY
80
83
—
80
83
—
79
84
—
79
84
—
%
STARTUP
DELAY
—
15
25
—
15
25
—
6
10
—
6
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
HEAT SINK RECOMMENDATIONS
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
dissipation (PDISS vs. ambient temperature for various heat sink
thermal resistances. PDISS may be calculated as:
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.
PDISS = POUT / efficiency – POUT
The efficiency for all combinations of POUT and VIN for the various
models may be obtained from the graphs on the preceding pages.
Example: Converter = HR702-2815, TAMB = 70°C,
VIN = 28 VDC, POUT = 45 watts
Efficiency = 85% (From Figure 7)
PDISS = (45 / 85) – 45 = 7.95 watts
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, VIN = 28 VDC, POUT = 45 W.
Thermal Resistance = 3°C / watt.
Efficiency = 83.5% (From Figure 3)
PDISS = (45 / 0.835) – 45 = 8.89 watts.
From Figure 1 we can see that the maximum allowed ambient
temperature is approximately 75°C.
20
W
/W C/W °C/W °C/
4°CU=3° U=2 U=0
U=
Watts
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
Pin
1
2
3
4
5
6
7, 8
9, 10
Single Output
Positive Input
Case Ground
Input Common
Inhibit/Sync In
Negative Sense
Positive Sense
Output Common
Positive Output
Dual Output
Positive Input
Case Ground
Input Common
Inhibit/Sync In
Negative Output
Positive Output
Output Common
No Connection
Triple Output
Positive Input
Case Ground
Input Common
Inhibit/Sync In
Negative Aux. Output
Positive Aux. Output
Output Common
Main (+5) Output
2
3
4
BOTTOM VIEW
HR700
See Section B8, case L, for dimensions.
9
7
5
10
8
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.
89
20 V
84
28 V
83
82
81
80
EFFICIENCY (%)
88
87
87
86
85
84
28 V
83
40 V
82
78
81
20
30
40
50
60
70
84
28 V
83
40 V
81
10
20
30
40
50
60
70
10
20
30
40
50
60
70
OUTPUT POWER (WATTS)
OUTPUT POWER (WATTS)
HR701-2805
EFFICIENCY VS. LINE & LOAD
HR701-2812
EFFICIENCY VS. LINE & LOAD
HR701-2815
EFFICIENCY VS. LINE & LOAD
FIGURE 5
FIGURE 4
87
87
19 V
19 V
19 V
85
85
83
83
83
81
79
28 V
77
75
40 V
73
EFFICIENCY (%)
85
EFFICIENCY (%)
EFFICIENCY (%)
85
OUTPUT POWER (WATTS)
87
81
79
28 V
77
75
40 V
73
10
20
30
40
50
60
OUTPUT POWER (WATTS)
HR702-2812
EFFICIENCY VS. LINE & LOAD
79
28 V
77
75
40 V
71
10
70
81
73
71
71
20
30
40
50
60
10
70
20
30
40
50
60
70
OUTPUT POWER (WATTS)
OUTPUT POWER (WATTS)
HR702-2815
EFFICIENCY VS. LINE & LOAD
HR703-28512
EFFICIENCY VS. LINE & LOAD
FIGURE 8
FIGURE 7
FIGURE 6
19
87
83
81
28 V
79
77
75
40 V
73
INPUT VOLTAGE (VOLTS)
19 V
85
EFFICIENCY (%)
86
82
FIGURE 3
HR702-2815
18
HR701-2815
17
HR701-2812
16
HR701-2815
15
18
HR702-2812
17
HR703-28512
HR703-28515
16
15
71
10
20
30
40
50
60
70
OUTPUT POWER (WATTS)
HR703-28515
EFFICIENCY VS. LINE & LOAD
FIGURE 9
B4-38
19 V
40 V
79
10
89
19 V
88
INPUT VOLTAGE (VOLTS)
EFFICIENCY (%)
85
EFFICIENCY (%)
86
10
20
30
40
50
60
70
10
20
30
40
50
60
70
OUTPUT POWER (WATTS)
OUTPUT POWER (WATTS)
LOW LINE DROPOUT VS
LOAD (50mV DROP)
LOW LINE DROPOUT VS LOAD
(50mV DROP)
FIGURE 10
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
or specifications without notice. HR700 Series is a trademark of Interpoint.
Copyright © 1992 - 1999 Interpoint. All rights reserved.
FIGURE 11
CASES
CASE L
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
CASES
CASE L
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)
Solder Tip-off
9
7
5
10
8
6
0.550 (13.97)
0.350 (8.89)
FIGURE 50: CASE L DIMENSIONS
B8-32
2.280 (57.91)
1.625 (41.28)
1.325 (33.66)
1.425 (36.20)
1.025 (26.04)
0.825 (20.96)
0.625 (15.88)
0.00
0.180 (4.57)
0.250 +0.05/-0.00
(6.35 +1.3/-0.0)
0.000
0.040 +0.007/-0.000
(1.02 +0.18/-0.00)
0.595 max
(15.11)
0.000
QA SCREENING
HR PRODUCTS
HR PRODUCTS
TEST (HR products)
PRE-CAP INSPECTION
Method 2017
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 and 4: +25°C case
HERMETICITY TESTING
Gross Leak, Dip (1 x 10-3)
FINAL VISUAL INSPECTION
Method 2009
STANDARD
yes
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MILPRF-38534.
Applies to the following products:
HR700 Series
HR300 Series
HR150 Series
HR120 Series
HR40 Series
C2-13
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