R-78HB-W Datasheet, PDF (1/4 Pages) Recom International Power – 0.5 AMP SIP3 Wired Single Output

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
DC/DC Converter
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.
3 ^{0.5 AMP}
3 ^YEAR
SIP3 Wired ^warranty
Single Output
Selection Guide
Part
Number
R-78HB5.0-0.5/W
R-78HB12-0.5/W
Input
Voltage Range ⁽²⁾
(VDC)
9-72
17-72
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
Notes:
Note1:
with normal start-up time an no external components = 100µF
with <1S start-up time = 6800µF
Specifications (measured at 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
Operating Frequency Range
Efficiency
Minimum Load ⁽³⁾
Output Ripple and Noise
Condition
5Vout
12Vout
Vin = 48VDC, 10% load
full load
Min.
9VDC
17VDC
1mA
120kHz
10mA
Typ. Max.
48VDC 72VDC
48VDC 72VDC
15mA 25mA
5mA
0.65W
800kHz
see Selection Guide
20mVp-p 60mVp-p
Typical Application Circuit
IEC60950-1 Certified
EN60950-1 Certified
EN55022 Certified
+V_IN
R-78HBxx-0.5/W
3.3µF/100V
required if
VIN= >50V
+V_OUT
-V_IN
-V_OUT
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.
continued on next page
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REV.: 1/2016
I-1