Datasheet

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-1.5(L)
Series
PROTECTIONS
Parameter
Condition
Value
Short Circuit Protection (SCP) below 100mW continuous, automatic recovery
Short Circuit Input Current nom. Vin= 12VDC 100mA max.
REGULATIONS
Parameter Condition Value
Output Accuracy 100% load ±2.0% typ / ±3.0% max.
Line Regulation low line to high line, 100% load ±0.3% typ. / ±0.5% max.
Load Regulation 10% to 100% load ±0.6% typ. / ±0.8% max.
Transient Response
100% <-> 50% load
Recovery Time
±80mV typ. / ±120mV max.
1.0ms min. / 1.5ms typ.
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 5019 x 10
3
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
Optional Diode Protection Circuit
Optional Protection 1: Optional Protection 2:
+V
in
+V
out
GNDGND
+V
in
+V
out
=
+V
out
- 0.3V
R-78Bxx-1.5
GND
+V
out
+V
in
R-78Bxx-1.5
GNDGND
GND
+V
out
+V
in
+V
in
+V
out
GNDGND
+V
in
+V
out
=
+V
out
- 0.3V
R-78Bxx-1.5
GND
+V
out
+V
in
R-78Bxx-1.5
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).