Recom R-78B1.8-1.0 Handleiding
Recom
Audio/video-converter
R-78B1.8-1.0
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Pagina 1/7
www.recom-power.com
REV.: 4/2019 I-1
Features
Switching
Regulator
• Efficiency up to 97%, no heatsinks required
• Pin compatible with LM78XX linears
• Low profile (L/W/H=11.5 x 8.5 x 17.5mm)
• Wide input range
• Short circuit protection, thermal shutdown
• Low ripple and noise
• „L“ version with 90° pins
• Positive to negative converter
R-78B-1.0(L)
Description
The R-78Bxx-1.0 series high efficiency switching regulators are ideally suited to replace 78xx
linear regulators and are pin compatible. The efficiency of up to 97% 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.
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 10mA
round off the specifications of this versatile converter series.
DC/DC Converter
1.0 Amp
SIP3
Single Output
EN55032 compliant
IEC/EN60950-1 certified
BASIC CHARACTERISTICS
Parameter Condition Min. Max.Typ.
Absolute Maximum Input
Voltage
1.5Vout , 1.8Vout
2.5Vout to 15Vout
26VDC
34VDC
Quiescent Current nom. Vin= 24VDC 5mA 7mA
Internal Power Dissipation Vout= 1.5VDC 0.65W
Internal Operating Frequency
nom. Vin= 24VDC 280kHz 330kHz 380kHz
Minimum Load
(2)
0%
Output Ripple and Noise
(3)
20MHz BW
1.5Vout to 6.5Vout
9Vout to 15Vout
15mVp-p
25mVp-p
20mVp-p
35mVp-p
Ref. Back Ripple Current 150mA
200mAp-p
Absolute Maximum
Capacitive Load
1 second start up, no external components
<1 second start up + diode protection circuit
470µF
6800µF
continued on next page
Selection Guide
Part Input Output Output Efficiency
Number Voltage Range Voltage Current @ min Vin @ max. Vin
[VDC] [VDC] [A] [%] [%]
R-78B1.5-1.0
(1)
4.75 - 26 1.5 1.0 77 71
R-78B1.8-1.0
(1)
4.75 - 26 1.8 1.0 80 74
R-78B2.5-1.0
(1)
4.75 - 32 2.5 1.0 85 78
R-78B3.3-1.0
(1)
4.75 - 32 3.3 1.0 89 83
R-78B5.0-1.0
(1)
6.5 - 32 5.0 1.0 93 88
R-78B6.5-1.0
(1)
9.0 - 32 6.5 1.0 94 90
R-78B9.0-1.0
(1)
12 - 32 9.0 1.0 95 93
R-78B12-1.0
(1)
16 - 32 12 1.0 96 95
R-78B15-1.0
(1)
20 - 32 15 1.0 97 96
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)
Notes:
Note2: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 10mA is recommended
Note3: Output Ripple and Noise is tested from 10% to 100% load
Model Numbering
Output Voltage Pinning
Output Current
R-78B__-1.0(L)
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REV.: 4/2019 I-2
DC/DC Converter
R-78Bxx-1.0(L)
Series
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Efficiency vs. Vin (full load)
Efficiency vs. Load (max. Vin)
Efficiency vs. Load (min. Vin)
Ripple vs. Vin (full load)
Ripple vs. Load (max. Vin)
Ripple vs. Load (min. Vin)
4.75 9 13 17 21 25 29 32
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Input Voltage [VDC]
3.3Vout
2.5Vout
1.8Vout
1.5Vout
15Vout
12Vout
9Vout
6.5Vout
5Vout
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 [%]
3.3Vout
2.5Vout
1.8Vout
1.5Vout
15Vout
12Vout
9Vout
6.5Vout
5Vout
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 [%]
3.3Vout
2.5Vout
1.8Vout
1.5Vout
15Vout
12Vout
9, 6.5Vout
5Vout
50
40
30
20
45
35
25
15
10
5
0
Ripple [mV]
Input Voltage [VDC]
4.75 9 13 17 21 25 29 32
3.3Vout
2.5Vout
1.8, 1.5Vout
15Vout
12, 9Vout
6.5Vout
5Vout
0 10 20 30 40 50 60 70 80 90
100
50
30
40
20
35
45
25
15
10
5
0
Ripple [mV]
Output Load [%]
3.3Vout
2.5Vout
1.8, 1.5Vout
15Vout
12, 9Vout
6.5Vout
5Vout
0 10 20 30 40 50 60 70 80 90
100
50
35
45
25
30
40
20
15
10
5
0
Ripple [mV]
Output Load [%]
15, 12, 9Vout
6.5Vout
2.5, 3.3, 5Vout
1.5, 18Vout
www.recom-power.com
REV.: 4/2019 I-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78Bxx-1.0(L)
Series
PROTECTIONS
Parameter Condition Value
Short Circuit Protection (SCP) below 100m continuous, automatic recoveryW
Short Circuit Input Current nom. Vin= 24VDC 60mA max.
REGULATIONS
Parameter Condition Value
Output Accuracy 100% load ±2.0% typ / ±3.0% max.
Line Regulation low line to high line, 100% load
1.5Vout to 6.5Vout
9Vout to 15Vout
±0.2% typ. / ±0.4% max.
±0.1% typ. / ±0.2% max.
Load Regulation 10% to 100% load
1.5Vout to 6.5Vout
9Vout to 15Vout
±0.4% typ. / ±0.6% max.
±0.25% typ. / ±0.4% max.
Transient Response
100% <-> 50% load
Recovery Time
±100mV typ. / ±150mV max.
1.0ms typ. / 1.5ms max.
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range with derating (see graph) -40°C to +85°C
Maximum Case Temperature +100°C
Temperature Coefficient ±0.015%/K
Thermal Impedance 0.1m/s, vertical 60K/W
Operating Altitude 2000m
Operating Humidity non-condensing 95% RH max.
Pollution Degree PD2
MTBF according to MIL-HDBK-217F, G.B. +25°C 8593 x 10
3
hours
continued on next page
To protect the converter during power-up, use C1=22µF if Vin>30V
C1
+V
in
+V
out
GNDGND
R-78Bxx-1.0
GND
+V
out
+V
in
Protection Circuit
Optional Diode Protection Circuit
Optional Protection 1: Optional Protection 2:
+V
in
+V
out
GNDGND
R-78Bxx-1.0
GND
+V
out
+V
in
+V
in
+V
out
=
+V
out
- 0.3V
R-78Bxx-1.0
GNDGND
GND
+V
out
+V
in
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).
Product specificaties
| Merk: | Recom |
| Categorie: | Audio/video-converter |
| Model: | R-78B1.8-1.0 |
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