F
EATURES
•
•
•
•
•
–40°C to +85°C operation
16 to 32 VDC input voltage
Fully isolated
Opto-coupler feedback
Switching frequency
Single and dual outputs
typical 80 kHz, variable freq.
Triple output 200 kHz, fixed
Topology – Flyback
Inhibit function
Indefinite short circuit protection
Up to 75% efficiency
Requires external capacitors
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
HR40 SERIES
4 WATT
MODELS
VDC O
UTPUT
SINGLE
DUAL
TRIPLE
5
±12
+5 & ±12
±15
+5 & ±15
•
•
•
•
•
Size (max.): 1.075 x 1.075 x 0.370 inches (27.31 x 27.31 x 9.40 mm)
See Section B8, case C2, for dimensions.
Weight:
20 grams maximum
Screening: Standard only. See Section C2 for screening description.
DESCRIPTION
The HR40 Series™ DC/DC converters offer the high efficiencies
associated with switching regulators, yet have full isolation of input
and output grounds. The units are built using thick-film hybrid tech-
nology and are sealed in metal packages for high-reliability applica-
tions. All models are guaranteed to pass a gross leak test (maximum
leak rate of 1 x 10
-3
atm-cc/sec).
The HR40 Series devices are flyback energy storage switching
regulators which require a minimum of components resulting in
small package size. Single and dual models self-oscillate at an
operating frequency which is an approximate inverse function of the
load. At full load, the frequency is typically 80 kHz for single and dual
output models. Triple output models operate at a fixed frequency of
approximately 200 kHz. A transformer in the forward power circuit
and an opto-coupler in the feedback/control loop maintain input to
output isolation.
Models are available with single 5 volt, dual 12 or 15 volt, or triple
(+5 and either ±12 or ±15) outputs with an input voltage range of 16
to 32 VDC. Output power of up to 4 watts is available from the dual
output models for either balanced or unbalanced loads; however, at
least 25% of the total load should be on the positive output. The
single output device can provide 3.5 watts, and the triple output can
supply up to 3.2 watts. The high efficiency is almost constant over
the entire input voltage range and from approximately 25% of full
load to full load. This makes the unit ideal for battery applications.
An open collector TTL inhibit is provided to allow power shutdown
and startup from a logic input. An open circuit on the inhibit terminal
(pin 15) gives normal operation, and a TTL low level shuts down the
converter. The inhibit pin has an open circuit voltage of 12 to 28 V.
Input current in the shutdown mode will be less than 15 mA. Current
limiting is provided on each output for indefinite short circuit protec-
tion.
Due to the high efficiency, heat sinking requirements are minimized,
but consideration should be given to removing self-generated heat
when operating these devices 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.
The converter can be operated at full load at a case temperature of
85°C, with the output power derated linearly to zero at 105°C.
W
ARNING
: E
XTERNAL
C
APACITORS
R
EQUIRED
External capacitors are required on the outputs.
Operating the unit
without external capacitors will result in damage to the internal
circuitry.
Minimum recommended capacitor values are given in
Tables 1 and 2. For optimum performance, low ESR (Equivalent
Series Resistance) solid tantalum capacitors are required. The
specifications on the following pages are based on the use of high-
quality solid tantalums. Operation with different types of capacitors
will seriously affect performance.
B4-51
HR40 SERIES
4 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 32 VDC
Output Power
• 3.2 to 4 watts depending on model
Lead Soldering Temperature (10 sec)
• 300°C
Storage Temperature Range (Case)
• –40°C to +125°C
DC/DC C
ONVERTERS
INHIBIT
Inhibit TTL Open Collector
• Logic low (output disabled)
≤
0.8 V
• Referenced to input common
• Logic high (output enabled)
≥
12 V
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• HR41-2805 100 ppm/°C typ, 200 max.
• HR42-28XX 50 ppm/°C typ.
• HR43-28XX 100 ppm/°C typ.
Input to Output Capacitance
• 60 pF typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• Single and dual output models, 80 kHz at
full load typical, variable frequency
• Triple output models, 200 kHz typical
fixed frequency
Inhibit Pin Voltage (unit enabled)
• 12 to 28 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 32 VDC continuous
• 40 V for 50 ms transient
Case Operating Temperature (Tc)
• –40°C to +85°C full power
• –40°C to +105°C absolute
Derating Output Power/Current
• Linearly from 100% at 85°C to 0% at 105°C
W
ARNING
: E
XTERNAL
C
APACITORS
R
EQUIRED
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE AND DUAL OUTPUT MODELS
PARAMETER
1
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
2
OUTPUT RIPPLE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
CONDITIONS
P
OUT
= 2 W
18 TO 32 V
IN
Tc = –40°C TO +85°C
BW = 1 MHz
18 - 32 V
IN
, P
OUT
= 2 W
NO LOAD TO FULL
Tc = –40°C TO +85°C
TRANSIENT 50 ms
INPUT CURRENT
NO LOAD
FULL LOAD
INHIBITED
EFFICIENCY
FULL LOAD
MIN
4.90
—
—
—
—
—
16
—
—
—
—
68
HR41-2805
TYP
5.0
—
—
75
5
25
28
—
7
—
—
72
MAX
5.10
700
3.5
150
10
50
32
40
10
192
15
—
MIN
±11.88
—
—
—
—
—
16
—
—
—
—
70
HR42-2812
TYP
±12
—
—
75
10
12
28
—
10
—
—
75
MAX
±12.12
±167
4.0
150
20
24
32
40
15
213
15
—
MIN
±14.85
—
—
—
—
—
16
—
—
—
—
70
HR42-2815
TYP
±15
—
—
75
10
12
28
—
10
—
—
75
MAX
±15.15
±133
4.0
150
20
24
32
40
15
213
15
—
%
mA
UNITS
VDC
mA
W
mV p-p
mV
mV
VDC
V
Notes
1. External capacitors required to prevent damage to internal circuitry (see
Table 1 for specifications).
2. Dual output models deliver up to 4 watts total for balanced or unbalanced
loads, however, the positive output should carry at least 25% of the total load.
SINGLE AND DUAL OUTPUT EXTERNAL CAPACITORS
O
PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY
.
T
ABLE
1: E
XTERNAL
C
APACITOR
R
EQUIREMENTS
Required
Connection
Positive Output (12 & 13) to
Output Common (8 & 9)
Positive Output (10) to
Dual Outputs
2
Output Common (8)
HR42-2812
External Capacitor (14) to
and
Output Common (8)
3
HR42-2815
Negative Output (12) to
Output Common (8)
Model
Single Output
HR41-2805
Minimum
Capacitor Value
1
220 µF, 10 V
100 µF, 25 V
100 µF, 25 V
10 µF, 25 V
POSITIVE
INPUT
1, 2
INHIBIT
15
17, 18
INPUT
COMMON
FEEDBACK
POSITIVE
OUTPUT
10
OUTPUT
COMMON
8
LOGIC
TIMING
CONTROL
SWITCH
VOLTAGE
REGULATOR
+
+
EXTERNAL
CAPACITORS
100µF
NEGATIVE
OUTPUT
12
14
10µF
+
100µF
Table 1 Notes
1. Capacitors should be high quality, low ESR components —
solid tantalum is recommended.
2. See Figure 1 for connection diagram
3. Place positive side of capacitor toward pin 8.
EXTERNAL
CAPACITOR
TERMINAL
F
IGURE
1: D
UAL
O
UTPUT
E
XTERNAL
C
APACITOR
C
ONNECTIONS
B4-52
DC/DC C
ONVERTERS
W
ARNING
: E
XTERNAL
C
APACITORS
R
EQUIRED
TRIPLE OUTPUT MODELS
PARAMETER
1
OUTPUT VOLTAGE
2
HR40 SERIES
4 WATT
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
HR43-2812
CONDITIONS
P
OUT
= 2 W
BALANCED LOAD
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
18 TO 32 V
IN
MAIN
AUX
MAIN
AUX
MIN
4.9
±11.5
10.0
—
—
—
—
—
—
—
—
16
—
—
—
—
68
TYP
5.0
±12.0
—
—
—
50
50
5
3
15
15
28
—
10
—
—
70
MAX
5.1
±12.5
400
±50.0
3.2
100
100
10
6
30
30
32
40
20
176
15
—
MIN
4.9
±14.5
10.0
—
—
—
—
—
—
—
—
16
—
—
—
—
68
HR43-2815
TYP
5.0
MAX
5.1
UNITS
VDC
±15.0 ±15.5
—
—
—
50
50
5
3
15
12
28
—
10
—
—
70
400
±40.0
3.2
100
100
10
7.5
30
24
32
40
20
176
15
—
%
mA
VDC
V
mV
mV
W
mV p-p
mA
Tc = –40°C TO +85°C
BW DC TO 1 MHz
P
OUT
= 2 W
18 TO 32 V
IN
MAIN
± AUX
LINE REGULATION
MAIN
± AUX
MAIN
± AUX
LOAD REGULATION
NO LOAD TO FULL
INPUT VOLTAGE
Tc = –40°C TO +85°C
TRANSIENT 50 ms
NO LOAD
INPUT CURRENT
FULL LOAD
INHIBITED
EFFICIENCY
FULL LOAD
Notes
1. External capacitors required to prevent damage to internal circuitry 2. Minimum load required on main output for full power auxiliary oper-
(see Table 2 for specifications).
ation.
TRIPLE OUTPUT EXTERNAL CAPACITOR
O
PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY
.
T
ABLE
2: E
XTERNAL
C
APACITOR
R
EQUIREMENTS
FEEDBACK
Model
HR43-2812
and
HR43-2815
Required
Connection
1
Positive 5 VDC Output (9) to
Output Common (6 or 7)
Minimum
Capacitor Value2
220 µF, 10 V
POSITIVE
INPUT
1, 2
INHIBIT
15
INPUT
COMMON
17, 18
+5 OUTPUT
9
REF. &
COMP
OUTPUT
COMMON
6, 7
8
POSITIVE
AUXILIARY
OUTPUT
5
NEGATIVE
AUXILIARY
OUTPUT
220µF
EXTERNAL
CAPACITOR
LOGIC
TIMING
CONTROL
SWITCH
Table 2 Notes
1. See Figure 2 for connection diagram.
2. Capacitors should be high quality, low ESR components —
solid tantalum is recommended.
DUAL
TRACKING
REGULATOR
F
IGURE
2:
T
RIPLE
O
UTPUT
E
XTERNAL
C
APACITOR
C
ONNECTIONS
B4-53
HR40 SERIES
4 WATT
DC/DC C
ONVERTERS
PIN OUT
W
ARNING
: E
XTERNAL
C
APACITORS
R
EQUIRED
O
PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY
.
Pin
1, 2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17, 18
1
Single Output
Positive Input
No connection
Case
No connection
No connection
No connection
Output Common
3
Output Common
3
No connection
No connection
Positive Output
3
Positive Output
3
No connection
Inhibit
No connection
Input Common
Dual Output
Positive Input
No connection
Case
No connection
No Connection
No connection
Output Common
No connection
Positive Output
No connection
Negative Output
No connection
Ext. Capacitor
Inhibit
No connection
Input Common
Triple Output
Positive Input
No connection
Case
Negative Aux. Output
Output Common Main
2
Output Common Aux.
2
Positive Aux. Output
+5 VDC Output
No connection
No connection
No connection
See Section B8. case C2, for dimensions
18 17
10
1 2
9
Dot on top of cover
indicates pin one.
BOTTOM VIEW
HR40
No connection
No connection
Inhibit
No connection
Input Common
F
IGURE
3: P
IN
O
UT
Pin Out Notes
1. Make external connection to both pins on all models.
Pins 1 and 2 positive input
Pins 17 and 18 input common
2. Pins 6 and 7 on triple output models are connected internally.
3. On the HR41-2805:
Make external connections to both output common pins (8 and 9).
Make external connections to both positive output pins (12 and 13).
MODEL NUMBERING KEY
HR4
Base Model
Number of Outputs
(1 = single, 2 = dual, 3 = triple)
Input Voltage
Output Voltage
(Auxiliary output on triple output models)
3 - 28
12
B4-54
24021-009-DTS Rev A
DQ# 2012
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. HR40 Series is a trademark of Interpoint.
Copyright © 1994 - 1999 Interpoint. All rights reserved.
CASE C
Dot on top of case
indicates pin one
C
ASES
BOTTOM VIEW CASE C1
MSA Series: Screening – Standard, ES, or 883
SMSA Series: Screening – Space Standard, H, or K
Seam Seal
Projection Weld
0.932
(23.67)
0.025
(0.64)
dia.
CASE C
BOTTOM VIEW
See Figures 9 - 11
for pin configurations.
Squared corner and dot on
top of case indicate pin one.
1
2
3
4
5
1.075 max
(27.31)
1.075 max
(27.31)
Materials
Header Case C1
Cold Rolled Steel/Nickel/Gold
Cases C2 and C3
Kovar/Nickel/Tin
Cover Case C1
Cold Rolled Steel/Nickel
Cases C2 and C3
Kovar/Nickel/Tin
Pins
Case C1
Copper/Nickel/Gold
Cases C2 and C3
Kovar/Nickel/Gold,
matched 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.
0.205
±0.010
(5.21
±0.25)
0.270 max.
(6.86)
0.000
0.205
±0.010
(5.21
±0.25)
0.270 max.
(6.86)
0.000
0.132
(3.35)
0.000
0.000
8
7
6
0.132 (3.35)
0.332 (8.43)
0.532 (13.51)
0.732 (18.59)
F
IGURE
9:
C
ASE
C1
BOTTOM VIEW CASE C2
MSR Series: Screening – Standard or ES
HR40 Series: No screening options
0.018
±0.002
dia.
(0.46
±0.05)
Dot on top of case
indicates pin one
1 2
0.800 (20.32
9
18 17
0.932 (23.67)
10
3 4
6 5
0.205
±0.010
(5.21
±0.25)
0.370 max.
(9.40)
0.350 (8.89)
Marker bead
on pin 18
0.100 (2.54)
Pins equally
spaced
0.800 (20.32)
F
IGURE
10:
C
ASE
C2
F
IGURE
8: C
ASE
C
M
AXIMUM
D
IMENSIONS
Seam Seal
BOTTOM VIEW CASE C3
MSF EMI Filter: Screening – Standard or ES
0.018
±0.002
dia.
(0.46
±0.05)
0.000
Dot on top of case
indicates pin one
1 2
0.800 (20.32
9 8
0.100 (2.54)
7
F
IGURE
11:
C
ASE
C3
B8-8
0.800 0.600
(20.32) (15.24)
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 dimen-
sions for accuracy.
0.205
±0.010
(5.21
±0.25)
0.205
±0.010
(5.21
±0.25)
0.370 max.
(9.40)
0.350 (8.89)
0.365 max.
(9.27)
0.000
0.000
0.300
(7.62)
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