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-1.0(L)
Series
PROTECTIONS
Parameter Condition Value
Short Circuit Protection (SCP) below 100mW continuous, automatic recovery
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
+V
in
+V
out
=
+V
out
- 0.3V
R-78Bxx-1.0
GND
+V
out
+V
in
R-78Bxx-1.0
GNDGND
GND
+V
out
+V
in
+V
in
+V
out
GNDGND
+V
in
+V
out
=
+V
out
- 0.3V
R-78Bxx-1.0
GND
+V
out
+V
in
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).