INNOLINE
DC/DC-Converter
R-78HB
www.recom-international.com I-31
REV:0/2009
0.5 AMP
SIP3
Single Output
●●Efficiency up to 96%, Non isolated,
no need for heatsinks
●●Pin-out compatible with LM78XX Linears
●●Low profile( L*W*H=11.5*8.5*17.5mm)
●High voltage input range, up to 72V
●Short circuit protection, Thermal shutdown
●Non standard outputs available as specials
between 3.3V~24V
●●Low ripple and noise
●”L” version with 90° pins
●See Innoline Application Notes for use as an
inverter (alternative to LM79xx Linear)
Features
Selection Guide
Part Input Output Output Efficiency
Number Range Voltage Current Vmin. 30V 72V
SIP3 (V) (V) (A) (%) (%) (%)
R-78HB3.3-0.5 9 - 72 3.3 0.5 82 80 76
R-78HB5.0-0.5 9 - 72 5.0 0.5 87 85 81
R-78HB6.5-0.5 9 - 72 6.5 0.5 91 87 84
R-78HB9.0-0.5 14 - 72 9.0 0.5 92 90 86
R-78HB12-0.5 17 - 72 12 0.5 94 93 89
R-78HB15-0.5 20 - 72 15 0.5 95 94 91
R-78HB24-0.3 36 - 72 24 0.3 96 92
Output Power (%)
120
100
20
60
100750
-40
Operating Temperature (°C)
0
80
5025
71
Safe Operating Area
85
40
Derating-Graph
(Ambient Temperature)
Description
* add Suffix “L” for 90° bent pins, e.g. R-78HB5.0-0.5L
R-78HBxx-0.5
-Vout
+Vout
+Vin
-Vin
The converter has a built in soft start circuit. Rapidly changing the input voltage
from Vin(min) Vin(max) can bypass this circuit and damage the converter.
3.3µF/100V
Required if
Vin>50V
Typical Application Circuit
EN-55022 Certified
EN-55024 Certified
EN-60601-1-2 Certified
EN-60950-1 Certified
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 utilisation 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.
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REV: 0/2009
R-78HB
Frequency (kHz)
800
50
Switching Frequency Vs
Load ( Vin=30~72V )
Vo=5.0V
Vo=9.0V
Vo=15V
200
Output Current ( mA )
100 200 300 400 500
Vo=24V
Vo=6.5V
10
100
Vo=3.3V
400
50
10
Vo=12V
Switching
Frequency
Characteristics Conditions Min. Typ. Max.
Input Voltage Range See table 9 48 72V
Output Voltage Range (for customized parts) All Series 3.3 24V
Output Current (see Note 1) 3.3V, 5V, 6.5V, 9V, 12V, 15V 10 500mA
24V 6 300mA
Output Current Limit (Vin = 48VDC) All Series 700 1200mA
Short Circuit Input Current All Series 15 25mA
Internal Input Filter 1µF Capacitor
Internal Power Dissipation 0.65W
Short Circuit Protection Continuous, automatic recovery
Output Voltage Accuracy At 100% Load ±2 ±3%
Line Voltage Regulation Vin = min. to max. at full load 0.4 1%
Load Regulation 10% to 100% full load 0.3 0.6%
Dynamic Load Stability (with Output Capacitor=100µF) 100% <-> 50% load ±75mV ±100mV
Ripple & Noise (without Output Capacitor) 10% to 100% full load 20mVp-p 60mVp-p
Temperature Coefficient -40°C ~ +85°C ambient 0.015%/°C
Max capacitance Load 100µF
Switching Frequency (See Graph) Full Load 120 800kHz
Quiescent Current Vin = 48VDC. at minimum load 1 5mA
Operating Temperature Range -40°C +85°C
Operating Case Temperature +100°C
Storage Temperature Range -55°C +125°C
Case Thermal Impendance 60°C / W
Thermal Shutdown Internal IC junction +160°C
Relative Humidity 95% RH
Package Weight 4g
Case Material Non-Conductive Black Plastic
Potting Material Epoxy (UL94V-0)
Soldering Temperature 265°C max./10 sec.
Conducted Emissions EN55022 Class B
Radiated Emissions EN55022 Class B
ESD EN61000-4-2 Class A
CE Certified EN-60950-1
MTBF (+25°C) using MIL-HDBK 217F 7395 x 10³ hours
(+71°C) using MIL-HDBK 217F 1242 x 10³ hours
R-78HBxx-0.5
(L) Series
Specifications (refer to the standard application circuit, Ta: 25°C, minimum load = 10%)
INNOLINE
DC/DC-Converter
}
Detailed Information see
Application Notes chapter "MTBF"
*Note: Operation under no load will not damage these devices, however they may not meet all specifications. A minimum load of 10mA is recommended
R-78HB
www.recom-international.com I-33
REV:0/2009
INNOLINE
DC/DC-Converter
Typical Characteristics
Efficiency (%)
50
Efficiency Vs
Vin (Full Load)
Vo=5V
Vo=3.3V
25
Vin ( V )
20 30 72
75
100
Vo=12V
Vo=15V
Vo=9V
Vo=6.5V
40 50 60
Vo=24V
9
Efficiency
Efficiency (%)
100
50
Efficiency Vs
Load ( Vin=Max )
Vo=24V
Vo=3.3V
Vo=5V
50
Output Current ( A )
100 200 300 400 500
75
25
Vo=15V
Vo=12V
Vo=6.5V
Vo=9V
10
Efficiency (%)
100
50
Efficiency Vs
Load ( Vin=Min )
Vo=3.3V
Vo=5V
50
Output Current ( A )
100 200 300 400 500
75
25
Vo=15V, 24V
Vo=12V
Vo=6.5V
Vo=9V
10
Ripple (mV)
50
Ripple Vs
Vin ( Full Load )
Vo=5V
Vo=3.3V
25
Vin ( V )
30 40 72
Vo=9V
Vo=12V,15V
Vo=6.5V
50 6020
Vo=24V
9
Ripple
R-78HBxx-0.5
(L) Series
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REV: 0/2009
R-78HB
2.54
2.54
Top View
Bottom View
8.50
2.0
0.25
5.08
3.21
213
4.10
0.51 typ.
0.7 typ.
17.5
RECOM
R-78HB5.0-0.5
****
Pb
1.00ø+0.15/0
11.50
RECOM
R-78HB5.0-0.5
****
Pb
8.50
4.10
1.50 max
INNOLINE
DC/DC-Converter
Package Style and Pinning (mm)
3rd angle
projection
SIP3 PIN Package
+Batt
-Batt
R-78HB12-0.5
+5V@850mA
0V Com
10uF
- +5V high current output for digital electronics
- Wide input range 18V to 72V - can be used with 24V, 48V or 60V batteries
+12V@100mA
- +12V output for interface and display electronics
R-785.0-1.0
Cstorage,
Brown Out
Protection
Reverse Polarity
Protection
- Further decoupling filtering may be necessary between the converters
R-78HBxx-0.5
(L) Series
High Input Voltage Multiple Output Supply
Pin Connections
Pin #
1 +Vin
2 GND
3 +Vout
xx.x ±0.5mm
xx.xx ±0.25mm
Recommended Footprint Details
L - Version
Typical Application
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 Circuit
Optional Protection 1: Optional Protection 2:
R-78xx-xx
-Vout
+Vout
+Vin
-Vin
R-78xx-xx
-Vout
Vout=
+Vout -
0.3V
+Vin
-Vin
Schottky Diode