Datasheet

www.recom-power.com
REV.: 3/2018 I-2
DC/DC Converter
Specifications (measured at Ta= 25°C, full load, nominal input voltage and after warm-up)
R-78W-0.5
Series
PROTECTIONS
Parameter Type Value
Short Circuit Protection (SCP) continuous, automatic recovery
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range with derating @ natural convection 0.1m/s (see graph) -40°C to +85°C
Maximum Case Temperature +100°C
Temperature Coefficient -40°C to +85°C ambient 0.015%/°C
Thermal Impedance 0.1m/s, vertical 70°C/W typ.
Operating Altitude 2000m
Operating Humidity non-condensing 95% RH max.
Pollution Degree PD2
MTBF according to MIL-HDBK-217F, G.B. + 25°C 9368 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]
internal structure
Controller
+V
IN
GND
GND
+V
OUT
Derating Graph
Reverse Current Protection
An internal blocking diode can prevent reverse current flow backwards into the output,
as this can damage the converter when it is powered down.
REGULATIONS
Parameter Condition Type Value
Output Accuracy all models ±2% typ. / ±3% max.
Line Voltage Regulation low line to high line, full load
3.3VDC, 5VDC
9VDC, 12VDC
±0.2% typ. / ±0.4% max.
±0.1% typ. / ±0.2% max.
Load Voltage Regulation 10% to 100% load
3.3VDC, 5VDC
9VDC, 12VDC
±0.4% typ. / ±0.6% max.
±0.25% typ. / ±0.4% max.
Transient Response
50% - 100% Load, ΔIo/Δt 25mA/µs
10% - 100% Load, ΔIo/Δt 25mA/µs
all models
±75mV typ.
±100mV max.