MODELS
VDC O
UTPUT
B4-47
SINGLE
5
12
15
DUAL
12
15
DESCRIPTION
The HR120 SeriesTM of DC/DC converters offers up to 12 watts of
power from single or dual outputs in a single package over a 40C
to +85C temperature range. Thick film hybrid manufacturing tech-
nology produces high levels of miniaturization, giving the HR120
Series converters a low profile (0.330 inch), small board area (1.65
square inches), and high power density (22 watt/in
3
).
The parts are packaged in sealed steel enclosures, making them
ideal for use in high reliability applications. Each unit is guaranteed
to pass a hermeticity test with a maximum leak rate of 0.001 atm-
cc/sec.
D
ESIGN
M
ETHODOLOGY
The HR120 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.
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.
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. HR120 converters are provided with internal filtering
elements on both the input and output to help reduce the need for
external components.
W
IDE
V
OLTAGE
R
ANGE
The 5 and 12 volt output models provide full power operation over
the input voltage range of 16 to 40 volts (19 to 40 volts for 15 volt
output models). Operation below 16 volts (or below 19 volts for the
15 volt output models), including operation in MIL-STD-704E emer-
gency power conditions, is possible with derated output power.
Please refer to the low voltage drop-out graphs, Figures 9 and 10.
The HR120 Series provides full power operation at case tempera-
tures from 40C up to +85C. Depending on operating levels, air
flow, and ambient temperature, heat sinking may be required.
I
NHIBIT
F
EATURE
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 (
0.8 V) 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.
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
HR120 SERIES
12 WATT
F
EATURES
40C to +85C operation
16 to 40 VDC input
(19 to 40 VDC input for
15 volt output models)
Fully Isolated
Optocoupler feedback
600 kHz typical operating frequency
Topology Single Ended Forward
50 V for up to 50 ms transient protection
Inhibit function
Indefinite short circuit protection
Up to 83% efficiency
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:
21 grams typical.
Screening: Standard only. See Section C2 for screening description.
RECOMMENDED OPERATING CONDITIONS
TYPICAL CHARACTERISTICS
INHIBIT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
16 to 40 VDC
19 to 40 VDC 15 volt outputs
Output Power
12 watts (10 watts HR121-2805)
Lead Soldering Temperature (10 sec per pin)
300C
Storage Temperature Range (Case)
55C to +125C
B4-48
HR120 SERIES
12 WATT
DC/DC C
ONVERTERS
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
Inhibit Pin Voltage (unit enabled)
8 to 11 V
Input Voltage Range
16 to 40 VDC continuous
19 to 40 VDC continuous 15 volt outputs
50 V for 50 msec transient
Case Operating Temperature (Tc)
40C to +85C full power
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
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
HR121-2805
HR121-2812
HR121-2815
PARAMETER
CONDITIONS
MIN TYP MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
4.95
5.0
5.05
11.88
12
12.12
14.85
15
15.15
VDC
OUTPUT CURRENT
--
--
2.0
--
--
1.0
--
--
0.8
A
OUTPUT POWER
MIN. TO MAX. V
IN
--
--
10
--
--
12
--
--
12
W
OUTPUT RIPPLE
10 kHz to 2 MHz
--
40
60
--
30
60
--
25
50
mV p-p
LINE REGULATION
MIN. TO MAX. V
IN
--
10
50
--
10
50
--
10
50
mV
LOAD REGULATION
NO LOAD TO FULL
--
10
50
--
10
50
--
10
50
mV
INPUT VOLTAGE
NO LOAD TO FULL
16
28
40
16
28
40
19
28
40
VDC
TRANSIENT 50 ms
--
--
50
--
--
50
--
--
50
INPUT CURRENT
NO LOAD
--
20
30
--
20
30
--
20
30
FULL LOAD
--
--
478
--
--
548
--
--
535
mA
INHIBITED
--
2
3
--
2
3
--
2
3
INPUT RIPPLE
CURRENT
10 kHz TO 2 MHz
--
135
180
--
150
200
--
150
220
mA p-p
EFFICIENCY
74
77
--
77
81
--
80
83
--
%
LOAD FAULT
1
POWER DISSIPATION
OVERLOAD
--
--
5
--
--
5
--
--
5
W
SHORT CIRCUIT
--
3.5
--
--
2.8
--
--
2
START-UP
DELAY
--
180
300
--
80
200
--
150
250
ms
Notes
1. Indefinite short circuit protection not guaranteed above 85C case temperature.
HR12 2 - 28 12
Base Model
Input Voltage
Output Voltage
Number of Outputs
(1 = single, 2 = dual)
B4-49
HR120 SERIES
12 WATT
DC/DC C
ONVERTERS
DUAL OUTPUT MODELS
HR122-2812
HR122-2815
PARAMETER
CONDITION
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
+V
OUT
11.88
12.0
12.12
14.85
15.0
15.15
VDC
V
OUT
11.82
12.0
12.18
14.77
15.0
15.23
OUTPUT CURRENT
1, 2
--
0.5
1.0
--
0.4
0.8
A
OUTPUT POWER
2
+V
OUT
--
--
10.8
--
--
10.8
V
OUT
--
--
10.8
--
--
10.8
W
TOTAL
--
--
12
--
--
12
OUTPUT RIPPLE
VOLTAGE
10 kHz TO 2 MHz
--
30
60
--
30
60
mV p-p
LINE REGULATION
+V
OUT
--
5
50
--
5
50
mV
MIN. TO MAX. V
IN
V
OUT
--
30
150
--
30
150
LOAD REGULATION
+V
OUT
--
5
50
--
10
50
mV
NO LOAD TO FULL
V
OUT
--
30
150
--
30
150
CROSS REGULATION
20% TO 80% LOAD
3
--
5
10
--
4
8
%
50% LOAD
4
--
4
5
--
3
5
INPUT VOLTAGE
CONTINUOUS
16
28
40
19
28
40
VDC
TRANSIENT 50 ms
--
--
50
--
--
50
INPUT CURRENT
NO LOAD
--
25
35
--
25
35
FULL LOAD
--
--
545
--
--
540
mA
INHIBITED
--
1.9
3
--
1.9
3
INPUT RIPPLE
CURRENT
10 kHz TO 2 MHz
--
175
240
--
175
240
mA p-p
EFFICIENCY
78
81
--
80
83
--
%
LOAD FAULT
5
POWER DISSIPATION
OVERLOAD
--
--
2.8
--
--
2
W
SHORT CIRCUIT
--
--
5
--
--
5
START-UP
DELAY
--
150
250
--
150
250
ms
Notes
1. Applies to both outputs.
2. Maximum combined output power is 12 watts. A maximum of 90% is available from either output.
3. 20% to 80% load on the positive output and 80% to 20% on the negative output. See Figure 8.
4. 50% load on the positive output and 50% to 20% load on the negative output. 50% load on the negative output and
50% to 20% load on the positive output. See Figure 7.
5. Indefinite short circuit protection not guaranteed above 85C case temperature.
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
MODEL NUMBER KEY
PIN OUT
Pin
Single Output
Dual Output
1
Inhibit
Inhibit
2
No connection
Positive Output
3
Output Common
Output Common
4
Positive Output
Negative Output
5
No connection
No connection
6
Case Ground
Case Ground
7
Input Common
Input Common
8
Positive Input
Positive Input
BOTTOM VIEW
HR120
Squared corner and dot on
top of cover indicate pin one.
1
2
3
4
5
8
7
6
F
IGURE
1: P
IN
O
UT
See Section B8, case E1, for dimensions
B4-50
HR120 SERIES
12 WATT
DC/DC C
ONVERTERS
Typical Performance Curves: 25C Tc , 28 VDC Vin, 100% load, unless otherwise specified.
F
IGURE
5
F
IGURE
7
Output Power (Watts)
HR122-2812 Efficiency
Efficiency (%)
50
90
80
70
60
2
4
6
8
10
12
16V
40V
28V
14
Output Power (Watts)
HR121-2805 Efficiency
Efficiency (%)
50
90
80
70
60
2
4
6
8
10
12
28V
14
40V
16V
F
IGURE
2
Output Power (Watts)
HR121-2812 Efficiency
Efficiency (%)
50
90
80
70
60
2
4
6
8
10
12
16V
40V
28V
14
F
IGURE
3
Output Power (Watts)
HR122-2815 Efficiency
Efficiency (%)
50
90
80
70
60
2
4
6
8
10
12
19V
40V
28V
14
F
IGURE
6
F
IGURE
4
Output Power (Watts)
HR121-2815 Efficiency
Efficiency (%)
50
90
80
70
60
2
4
6
8
10
12
19V
40V
28V
14
Output Load (%)
Positive Output 20% to 80% Load
Negative Output 80% to 20% Load
HR122 Negative Output Voltage
Cross Regulation
Negative Output Voltage Change (%) 20
0
20
40
60
80
100
10
5
15
0
5
10
15
20
2812
2815
F
IGURE
8
Output Power (Watts)
50 mV Drop
HR121 Low Line Dropout
Input Voltage (Volts)
11
2
4
6
8
10
12
14
13
14
12
15
16
17
18
19
2812
2815
2805
F
IGURE
9
F
IGURE
10
Output Power (Watts)
50 mV Drop
HR122 Low Line Dropout
Input Voltage (Volts)
11
2
4
6
8
10
12
14
13
14
12
15
16
17
18
19
2812
2815
Output Load (%)
Condition A: 50% Load Pos. Vout, 50% to 20% Neg. Vout
Condition B: 50% Load Neg. Vout, 50% to 20% Pos. Vout
HR122 Negative Output Voltage
Cross Regulation
Negative Output Voltage Change (%) 10
0
10
2
30
40
50
6
4
8
0
2
4
6
10
2815
2812
Cond. B
Cond. A
2812
8
2
21821-009-DTS Rev A
DQ# 2011
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. HR120 Series is a trademark of Interpoint.
Copyright 1994 - 1999 Interpoint. All rights reserved.
B8-10
CASE E
C
ASES
CASE E
BOTTOM VIEW
See Figures 16 18
for pin configurations.
Squared corner and dot on top
of case indicate pin one.
1.460 max
(37.08)
1.130 max
(28.70)
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
Cold Rolled Steel/Nickel/Gold)
Pins #52
alloy/Gold
compression glass seal
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 300
C for 10 seconds
per pin.
0.000
0.205
(5.21)
0.505
(12.83)
0.705
(17.91)
0.905
(22.99)
1.105
(28.07)
0.330 max
(8.38)
0.000
0.25 (6.35)
0.000
0.160
(4.06)
0.960
(24.38)
1
2
3
4
5
0.030 dia.
(0.76)
8
7
6
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
BOTTOM VIEW CASE E1
0.330 max
(8.38)
0.000
0.25 (6.35)
Projection Weld
Seam Seal
Squared corner and dot on top
of case indicate pin one.
F
IGURE
16: C
ASE
E1
F
IGURE
15: C
ASE
E M
AXIMUM
D
IMENSIONS
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.
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