Features
Switching
Regulator
Description
•
•
•
•
•
•
•
Efficiency up tpo 96%, no heatsinks required
Pin-out compatible with LM78XX linears
Low profile (L/W/H=11.5 x 8.5 x 17.5mm)
High input voltage range, up to 72V
Short circuit protection, thermal shutdown
Low ripple and noise
„L“ version with 90° pins
DC/DC Converter
R-78HB-0.5(L)
The R-78HBxx-Series high efficiency, high input voltage switching regulators are ideally suited to replace
78xx linear regulators and are pin compatible. The efficiency of up to 96% means that very little energy
is wasted as heat so there is no need for any heat sinks with their additional space and mounting costs.
An input voltage range of up to 8:1is unsurpassed by any other converter and allows the full stored
energy utilization of standard and high voltage batteries. The fully protected output is ideal for industrial
applications (especially for industry standard 24VDC bus supplies) and the L-Version with 90° pins
allows direct replacement for laid-flat regulators where component height is at a premium. Low ripple
and noise figures and a short circuit input current of typically only 15mA round off the specifications of
this versatile converter series. Typical applications include telecommunication, automotive, industrial,
aerospace and battery powered applications.
0.5 Amp
SIP3
Single Output
Selection Guide
Part
Number
R-78HB3.3-0.5
R-78HB5.0-0.5
R-78HB6.5-0.5
R-78HB9.0-0.5
R-78HB12-0.5
R-78HB15-0.5
R-78HB24-0.3
Input
Voltage Range
[VDC]
9 - 72
9 - 72
9 - 72
14 - 72
17 - 72
20 - 72
36 - 72
Output
Voltage
[VDC]
3.3
5.0
6.5
9.0
12
15
24
Output
Current
[A]
0.5
0.5
0.5
0.5
0.5
0.5
0.3
Efficiency
@ min Vin
@ max. Vin
[%]
[%]
82
76
87
81
91
84
92
86
94
89
95
91
96
92
Model Numbering
R-78HB__- /L
Output Voltage
Pinning
(1)
Output Current
IEC/EN60950-1 certified
EN55032 certified
Notes:
Note1: add suffix „/L” for 90° bent pins, e.g. R-78B5.0-1.0L
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
BASIC CHARACTERISTICS
Parameter
Internal Input Filter
Absolute Maximum Input Voltage Range
Quiescent Current
Internal Power Dissipation
Minimum Load
(2)
2%
nom. Vin= 48VDC
1mA
Condition
Min.
Typ.
Max.
75VDC
5mA
0.65W
1µF capacitor
Notes:
Note2: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 10mA is recommended
continued on next page
www.recom-power.com
REV.: 4/2018
I-1
R-78HBxx-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Parameter
Internal Operating Frequency
Output Ripple and Noise
Absolute Maximum
Capacitive Load
(L) Series
Condition
nom. Vin= 48VDC
20MHz BW (10 - 100% load)
1 second start up, no external components
<1 second start up + diode protection circuit
Min.
120kHz
Typ.
20mVp-p
Max.
800kHz
60mVp-p
100µF
6800µF
Switching Frequency vs. Load
800
400
Frequency [kHz]
200
24Vout
15Vout
12Vout
9Vout
6.5Vout
5Vout
3.3Vout
50
100
200
300
400
500
100
50
10
10
Output Current (mA)
Efficiency vs. Vin (full load)
100
90
80
Ripple vs. Vin (full load)
50
45
40
35
24Vout
15, 12Vout
9Vout
6.5Vout
5Vout
3.3Vout
Efficiency [%]
70
Ripple [mV]
60
50
40
30
20
10
0
9
18
24Vout
15Vout
12Vout
9Vout
6.5Vout
5Vout
3.3Vout
27
36
45
54
63
72
30
25
20
15
10
5
0
9
18
27
36
45
54
63
72
Input Voltage [VDC]
Input Voltage [VDC]
continued on next page
www.recom-power.com
REV.: 4/2018
I-2
R-78HBxx-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Efficiency vs. Load (max. Vin)
100
90
80
50
40
(L) Series
Ripple vs. Load (max. Vin)
60
24Vout
15, 12Vout
9Vout
6.5Vout
5Vout
3.3Vout
Efficiency [%]
70
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
Ripple [mV]
100
60
24Vout
15Vout
12Vout
9Vout
6.5Vout
5Vout
3.3Vout
90
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
Output Load [%]
Efficiency vs. Load (min. Vin)
100
90
80
Ripple vs. Load (min. Vin)
60
50
40
24Vout
15, 12Vout
9Vout
6.5Vout
5Vout
3.3Vout
Efficiency [%]
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
24, 15Vout
12Vout
9Vout
6.5Vout
5Vout
3.3Vout
80
90
100
Ripple [mV]
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
Output Load [%]
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
Transient Response
(3)
Condition
full load
low line to high line, full load
10% to 100% load
100% <-> 50% load
Notes:
Note3: Measurements are made with a 100µF output capacitor
Value
±2.0% typ / ±3.0% max.
±0.4% typ. / ±1.0% max.
±0.3% typ. / ±0.6% max.
±75mV typ. / ±100mV max.
www.recom-power.com
REV.: 4/2018
I-3
R-78HBxx-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Short Circuit Input Current
(L) Series
Condition
below 100mW
nom. Vin= 24VDC
+V
IN
Value
continuous, automatic recovery
R-78HBxx-0.5
OUT
15mA typ. / 25mA max.
+V
Optional Diode Protection Circuit
Add a blocking diode to Vout if
current can flow backwards into
the output, as this can damage the
converter when it is powered down.
The diode can either be fitted
across the device if the source is
low impedance or fitted in series
with the output (recommended).
Optional Protection 1:
Optional Protection 2:
GND
GND
+V
OUT
=
+V
OUT
- 0.3V
+V
IN
R-78HBxx-0.5
+V
OUT
+V
IN
R-78HBxx-0.5
GND
GND
+V
OUT
=
+V
OUT
- 0.3V
GND
GND
Protection Circuit
+V
IN
+V
IN
GND
R-78HBxx-0.5
R-78HBxx-0.5
C1
GND
+V
OUT
GND
GND
To protect the converter during power-up, use C1=3.3µF/100V if Vin>50V
Revese Polarity
ENVIRONMENTAL
Protection
Parameter
Operating Temperature Range
Maximum Case Temperature
Temperature Coefficient
Thermal Impedance
Operating Altitude
-Batt
Operating Humidity
+Batt
R-78HBxx-0.5
C
storage
Condition
with derating (see graph)
+12V @ 100mA
+5V @ 850mA
Value
+100°C
-40°C to +85°C
±0.015%/°C
60°C/W
2000m
Brown out
Protection
0.1m/s, vertical
R-785.0-1.0
10uF
non-condensing
• Wide input range 18V to 72V - can be used with 24V, 48V or 60V batteries
• +12V outputs for interface and display electronics
+25°C
according to MIL-HDBK-217F, G.B.
• +5V high current output for digital electronics
+71°C
• Further decoupling filtering may be necessary between the converters
100
90
80
0V Com
95% RH max.
PD2
7395 x 10
3
hours
1242 x 10
3
hours
Pollution Degree
MTBF
Derating Graph
Output Load [%]
70
60
50
40
30
20
10
0
-40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90 100
71 85
Ambient Temperature [°C]
www.recom-power.com
REV.: 4/2018
I-4
R-78HBxx-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
Information Technology Equipment, General Requirements for Safety
EAC
RoHs 2+
(L) Series
Report / File Number
1603123
RU-AT.49.09571
Standard
IEC60950-1:2005, 2nd Edition + AM 2:2013
EN60950-1:2006 + AM 2:2013
TP TC 004/2011
RoHS 2011/65/EU + AM2015/863
EMC Compliance
Electromagnetic compatibility of multimedia equipment -
Emission requirements
ESD Electrostatic discharge immunity test
Radiated, radio-frequency, electromagnetic field immunity test
Condition
with external components
Air ±8kV, Contact ±4kV
3V/m
Standard / Criterion
EN55032, Class A
EN55032, Class B
EN61000-4-2, Criteria A
EN61000-4-3, Criteria A
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Material
Package Dimension (LxWxH)
Package Weight
Type
case
potting
Value
non-conductive black plastic, (UL94 V-0)
silicone, (UL94 V-0)
11.5 x 8.5 x 17.5mm
4g typ.
Dimension Drawing (mm)
with suffix
„/L”
bent pins
embossed logo
embossed logo
8.5
11.5
8.5
11.5
Pin Connections
Pin #
Single
1
+Vin
2
GND
3
+Vout
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
17.5
19.0
17.5
Marking
0.51
Marking
1.50
+0.10/-0.05
4.10
0.70
0.25
±0.05
0.70
+0.10/-0.05
6.10
Recommended Footprint Details
Recommended Footprint Details
2.54
Bottom View
1 2 3
1 2 3
Top View
1 2 3
2.00
3.21
5.08
2.00
2.54
Bottom View
Top View
5.08
4.10
2.54
1 2 3
2.54
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REV.: 4/2018
I-5
0.25
±0.05
0.51
3°
-9
90
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