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RFS/RDS Series Data Sheet
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20W SMT DC-DC Converters, 1.5 – 5 V Output
Shutdown
All specifications apply over input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Conditions/Description
Min
Nom
Max
Unit
RFS models (pos. logic)
– Converter ON
– Converter OFF
Voltage source or open circuit
Sink current (V i = V i nom )
Shutdown pin is pulled low
3.5
–1.0
1.0
5.5
1.0
V
mA
V
RDS models
Positive logic:
On/Off signal is low– converter OFF
– Converter ON
– Converter OFF
High logic range
Shutdown pin is pulled low
2.5
–1.0
5.5
1.0
V
V
Negative logic 1 :
On/Off signal is low– converter ON
– Converter ON
– Converter OFF
Low logic range
Shutdown pin is pulled high
–1.0
1.0
0.25
5.5
V
V
1
Prproducts with the suffix -NM6 or -NM6G .
Temperature Derating Curves
The derating curves below give an indication of the output power achievable with and without forced-air cooling.
However in the final application, in order to ensure the reliability of the converter, care must be taken to ensure the
maximum case temperature is not exceeded under any conditions.
RFS Series:
Output Power vs Ambient Temperature and Airflow
120
100
80
60
40
20
0
200LFM (1 m/s)
0 LFM
0
10
20
30
40
50
60
70
80
90
100
110
Ambient Temp. (°C)
BCD.00017 Rev. AA, 18-Oct-2010
Page 12 of 18
www.power-one.com
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