Features
Switching
Regulator
Description
• 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
DC/DC Converter
R-78HB/W
0.5 AMP
3
SIP3 Wired
Single Output
3Y
wa
EAR
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.
rranty
Selection Guide
Part
Number
R-78HB5.0-0.5/W
R-78HB12-0.5/W
Input
Voltage Range
(2)
[VDC]
9-72
17-72
Notes:
Note1:
Output
Voltage
[VDC]
5.0
12
Output
Current
[A]
0.5
0.5
Efficiency
typ @ min Vin.
[%]
86
93
Max. Capacitive
Load
(1)
[µF]
100/6800
100/6800
with normal start-up time an no external components = 100µF
with <1S start-up time = 6800µF
Specifications
(measured @ ta= 25°C, full load, nominal input voltage and after warm-up)
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
(2)
Short Circuit Input Current
Quiescent Current
Internal Power Dissipation
Internal Operating Frequency
Efficiency
Minimum Load
(3)
Output Ripple and Noise
10mA
20mVp-p 60mVp-p
full load
120kHz
Vin = 48VDC, 10% load
1mA
0.65W
800kHz
see Selection Guide
Condition
5Vout
12Vout
Min.
9VDC
17VDC
Typ.
48VDC
48VDC
15mA
Max.
72VDC
72VDC
25mA
5mA
IEC60950-1 Certified
EN60950-1 Certified
EN55022 Certified
Typical Application Circuit
+V
IN
R-78HBxx-0.5/W
3.3µF/100V
required if
V
IN
= >50V
+V
OUT
-V
IN
-V
OUT
Notes:
Note2: The converter has built in soft start circuit. Rapidly changing the input voltage from V
IN
min
to V
IN
max
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.
continued on next page
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REV.: 2/2016
I-1
R-78HB/W
DC/DC Converter
Specifications
(measured @ ta= 25°C, full load, nominal input voltage and after warm-up)
Efficiency vs. Load
R-78HB5.0-0.5/W
100
12Vin
24Vin
36Vin
48Vin
100
24Vin
36Vin
48Vin
Series
R-78HB12-0.5/W
96
96
Efficiency [%]
Efficiency [%]
92
92
88
88
84
84
0
0.1
0.2
0.3
0.4
0.5
0.6
0
0.1
0.2
0.3
0.4
0.5
0.6
Output Current [A]
Output Current [A]
REGULATIONS
Parameter
Output Voltage Accuracy
Line Voltage Regulation
Load Voltage Regulation
Dynamic Load Stability
Condition
100% load
Vin= min. to max., full load
10% to 100% load
with 100µF output Capacitor, 100% <-> 50% load
Value
±2% typ. / ±3% max.
0.4% typ. / 1% max.
0.3% typ. / 0.6% max.
±75mV typ. / ±100mV max.
PROTECTIONS
Parameter
Internal Input Filter
Short Circuit Protection (SCP)
Condition
Value
1µF Cpacaitor
continuous, automatic recovery
Optional Protection Circuit
internal structure
+V
IN
Controller
+V
OUT
GND
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REV.: 2/2016
GND
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R-78HB/W
DC/DC Converter
Specifications
(measured @ ta= 25°C, full load, nominal input voltage and after warm-up)
ENVIRONMENTAL
Parameter
Operating Temperature Range
Maximum Case Temperature
Case Thermal Impedance
MTBF
MIL-HDBK 217F, +25°C
MIL-HDBK 217F, +71°C
100
80
60
40
20
0
-40
Series
Condition
with derating (see graph)
Value
-40°C to +85°C
+100°C
55°C/W
7395 x 10
3
hours
1242 x 10³ hours
Derating Graph
Output Power [%]
-20
0
20
40
60
Ambient Temperature [°C]
80 100
71 85
SAFETY AND CERTIFICATIONS
Certificate Type
IEC/EN General Safety
Report / File Number
LVD 1603123
Standard
IEC/EN-60950-1, 2nd Edition + AM:2
EMI Compliance
EMC Conducted and Radiated
ESD
Condition
Standard / Criterion
EN55022, Class B
EN61000-4-2, Criteria A
DIMENSION and PHYSICAL CHARACTERISTICS
Parameter
Case Material
Potting Material
Package Dimension (LxWxH)
Package Weight
continued on next page
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REV.: 2/2016
I-3
Type
Value
non-conductive black plastic (UL94V-0)
epoxy (UL94V-0)
12.1 x 9.7 x 24.0mm
4.5g
R-78HB/W
DC/DC Converter
Specifications
(measured @ ta= 25°C, full load, nominal input voltage and after warm-up)
Dimension Drawing (mm)
12.1
Series
Top View
embossed logo
9.7
R-78HB/W
Marking
Connection
Wired Color
Type
Wire Composition
1, red
UL-1430, AWG22
17/0.16
2, black
UL-1430, AWG22
17/0.16
3, brown
UL-1430, AWG22
17/0.16
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.35mm
xxxx
1 2 3
0.51
Function
+Vin
GND
+Vout
95±5
24.0
Wire Composition
10±3
insulation
Ø1.56
Bottom View
wire
Ø0.76
APPLICATION
Standard Application
LED Driver
18V
Ι
out
1050mA
Ι
LED
980mA
AC
DC
Constan Current
Ι
R-78
70mA
R-78HB12/W
Ι
FAN
12V/100mA
FAN
Constan Voltage
PACKAGING INFORMATION
Packaging Dimension (LxWxH)
Packaging Quantity
Storage Termperature Range
Storage Humidity
non-condensing
cardboard box
140.0 x 130.0 x 65.0mm
25pcs
-55°C to +125°C
95%, RH max.
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit written
consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
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.
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REV.: 2/2016
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