www.recom-power.com REV.: 3/2018 I-1
Features
Switching
Regulator
• Efficiency up to 93%, no need for heatsinks
• High voltage input range, up to 50V
• Short circuit protection, thermal shutdown
• All-in-one solution, no external components
required
• IEC/EN60950-1 + AM:2 certified
R-78HB/W
Description
The R-78HBxx/W series high efficiency, high input voltage switching regulators are ideally suited to
replace 78xx linear regulators. The efficiency of up to 93% 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. A wide
input voltage range allows the full stored energy utilization of standard 12, 24 and 36V batteries as
well as COB LED drivers. No external components are required to make a complete regulated, short-
circuit protected supply. A built-in protection diode allows high capacitive loads. Typical applications
include Auxiliary fan CV power supplies powered from CC LED drivers, industrial, aerospace and battery
powered applications.
DC/DC Converter
0.5 Amp
SIP3 Wired
Single Output
IEC60950-1 certified
EN60950-1 certified
EN55032 compliant
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Input Voltage Range (2) nom. Vin = 48VDC 9VDC 48VDC 72VDC
Quiescent Current nom. Vin = 48VDC, 10% load 1mA 5mA
Internal Power Dissipation 0.65W
Internal Operating Frequency full load 120kHz 800kHz
Minimum Load (3) 10mA
Output Ripple and Noise 20MHz BW limited 20mVp-p 60mVp-p
continued on next page
Specifications (measured @Ta= 25°C, full load, nominal input voltage and after warm-up)
Selection Guide
Part Input Output Output Efficiency Max. Capacitive
Number Voltage Range (2) Voltage Current typ @ min Vin. Load (1)
[VDC] [VDC] [A] [%] [µF]
R-78HB5.0-0.5/W 9-72 5.0 0.5 86 100/6800
R-78HB12-0.5/W 17-72 12 0.5 93 100/6800
Notes:
Note1: Max. Cap Load is tested at nominal input and full resistive load with 1 second
start-up time and no external components = 100µF , with <1s start-up time = 6800µF
Typical Application Circuit
R-78HBxx-0.5/W+VIN
-VIN -VOUT
+VOUT
3.3µF/100V
required if
VIN= >50V
Model Numbering
Output Voltage Wired
Output Current
R-78HB__-0.5/W
www.recom-power.com REV.: 3/2018 I-2
DC/DC Converter
Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
R-78HB/W
Series
REGULATIONS
Parameter Condition Value
Output Voltage Accuracy 100% load ±2.0% typ. / ±3.0% max.
Line Voltage Regulation Vin= min. to max., full load 0.4% typ. / 1.0% max.
Load Voltage Regulation 10% to 100% load 0.3% typ. / 0.6% max.
Transient Response with 100µF output capacitor, 100% <-> 50% load ±75mV typ. / ±100mV max.
PROTECTIONS
Parameter Condition Value
Internal Input Filter 1µF capacitor
Short Circuit Protection (SCP) continuous, automatic recovery
Short Circuit Input Current 15mA typ. / 25mA max.
internal structure
Controller
+VIN
GND GND
+VOUT
Optional Protection Circuit
Efficiency vs. Load
R-78HB12-0.5/WR-78HB5.0-0.5/W
Notes:
Note2: The converter has built in soft start circuit. Rapidly changing the input voltage from VINmin to VINmax
can bypass this circuit and damage the converter
Note3: Operation under no load will not damage the devices, however they may not meet all specifications
A minimum load of 10mA is recommended
0 10 20 30 40 50 60 70 80 90
100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
12Vin
24Vin
36Vin
48Vin
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
24Vin
36Vin
48Vin
www.recom-power.com REV.: 3/2018 I-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
R-78HB/W
Series
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range with derating @ natural convection 0.1m/s (see graph) -40°C to +85°C
Maximum Case Temperature +100°C
Thermal Impedance 55°C/W typ.
Operating Altitude 2000m
Operating Humidity non-condensing 95% RH max.
Pollution Degree PD2
MTBF according to MIL-HDBK-217F, G.B. +25°C
+71°C
7395 x 103 hours
1242 x 10³ hours
-40 -20 0 20 40 70
71 85
60-30 -10 10 30 50 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Output Load [%]
Ambient Temperature [°C]
Derating Graph
DIMENSION and PHYSICAL CHARACTERISTICS
Parameter
Type
Value
Material case
potting
non-conductive black plastic, (UL94 V-0)
epoxy, (UL94 V-0)
Package Dimension (LxWxH) 12.1 x 9.7 x 24.0mm
Package Weight 4.5g
continued on next page
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Information Technology Equipment, General Requirements for Safety
1603123 IEC60950-1:2005, 2nd Edition + AM 2:2013
EN60950-1:2006 + AM 2:2013
EAC RU-AT.49.09571 TP TC 004/2011
RoHs 2+ RoHS 2011/65/EU + AM2015/863
EMC Compliance Condition Standard / Criterion
Electromagnetic compatibility of multimedia equipment -
Emission requirements with external components EN55032, Class B
ESD Electrostatic discharge immunity test Air ±8kV, Contact ±4kV EN61000-4-2, Criteria A
Radiated, radio-frequency, electromagnetic field immunity test 3V/m EN61000-4-3, Criteria A
www.recom-power.com REV.: 3/2018 I-4
DC/DC Converter
Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
R-78HB/W
Series
PACKAGING INFORMATION
Packaging Dimension (LxWxH) cardboard box 140.0 x 130.0 x 65.0mm
Packaging Quantity 25pcs
Storage Termperature Range -55°C to +125°C
Storage Humidity non-condensing 95% RH max.
APPLICATION
Bottom View
Top View
embossed logo
321
9.7
12.1
24.095±510±3
Ø0.76
Ø1.56
0.51
Marking
Dimension Drawing (mm)
R-78HB12/W
12V/100mA
AC
DC
1050mA 980mA
18V
70mA
Ιout ΙLED
ΙR-78
ΙFAN
LED Driver
FAN
Constan Current
Constan Voltage
Standard Application
The
product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer.
The
products
are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or
cause
loss
of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the
unauthorized
use of RECOM products in such safety-critical applications.
Wire/cable information
# Function Wire color Type AWG Strands
1 +Vin red UL-1430 22 17/0.16
2 GND black UL-1430 22 17/0.16
3 +Vout brown UL-1430 22 17/0.16
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
