Description
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
MCD10079 Rev. 1.3, 15-Jun-10
The compact DFA20 Series provides power densities up
to 11 watts per cubic inch (0.67 watts per cm 3 ). Ideal for
battery-operated, industrial, medical control, and remote
data collection systems, this converter has fully-filtered
inputs and outputs. Complete overload protection with
independent pulse-by-pulse current limiting and an
overtemperature shutdown ensures reliable system
operation. The output of the converter is electrically
isolated, thereby allowing the output to be configured as
a positive or negative output voltage.
(17.78)
(15.24)
(10.16)
(13.0)
0.700
0.600
(7.62)
0.400
0.300
0.000
0.100
(2.54)
0.51
Model Selection
DFA20E12S3.3
DFA20E12S5
DFA20E12S12
DFA20E12S15
DFA20E24S3.3
DFA20E24S5
DFA20E24S12
DFA20E24S15
DFA20E48S12
Model
Pin
1
2
3
4
5
6
7
1
2
3
Model numbers highlighted in yellow or shaded are not
recommended for new designs.
Function
On/Off
No Pin
+Input
-Input
+Out
Trim
-Out
BOTTOM VIEW
(51.31)
Min
2.02
18
18
18
18
36
9
9
9
9
Input
VDC
Max
18
18
18
18
36
36
36
36
72
4
Output Output
5
6
7
VDC
(51.31)
3.3
3.3
12
15
12
15
12
2.02
NOTES:
(1) All parameters measured at Tc = 25°C, nominal input voltage and full-rated load unless otherwise
noted.
(2) The Case is tied to the -Input, Pin 2.
(3) The functional temperature range is intended to give an additional data point for use in evaluating
this power supply. At the low functional temperature the power supply will function with no side
effects. However, sustained operation at the high functional temperature will reduce expected
operational life. The data sheet specifications are not guaranteed beyond the case operating range.
(4) The case thermal impedance is specified as the case temperature rise over ambient per package
watt dissipated.
5
5
0.040 (1.02) DIA
6 PLACES
4000
4000
1700
1400
4000
4000
1700
1400
1700
mA
SIDE VIEW
DFA20 Single-Output DC-DC Series Data Sheet
Page 1 of 4
Features
• RoHS lead solder exemption compliant
• Remote On/Off and trim
• Overcurrent protection and thermal shutdown
• Efficiencies to 83%
• 700V isolation; up to 1544V
• Power density up to 11 Watts
• Five-sided, shielded case
on 48V converters
per cubic inch
ON/OFF Function
ON Logic Level
or Pin Open
OFF Logic Level
or Tie Pin to -Input
Open Circuit Voltage
Input Resistance
Converter Idle Current
ON/OFF Pin Lo w
Isolation (2 )
Isolation Voltage
Input-to-Output Capacitance
Output Trim Function
Tr im Range
Input Resistance
Open Circuit Voltage
En vi ronmental
Case Operating Range, Tc
Case Functional Range (3)
Storage Range
T hermal Shutdown
Case Temperature
T hermal Impedance (4)
General
MT BF (Calculated)
Unit Weight
12V Models
24V and 48V Models
Input to Output 12V, 24V
Input to Output 48V
No Derating
Chassis Mount ing Kit 12V, 24V
10μA Leakage
General Specifications (1)
48V
Al l Models
MAX
MAX
MAX
MAX
T YP
TYP
TYP
TYP
T YP
T YP
T YP
T YP
T YP
TYP
MIN
MIN
MIN
MIN
MIN
MIN
MIN
MIN
800,000
2.3 / 65
> 1.6
< 0.7
1544
www.power-one.com
700
290
100
105
105
2. 5
2. 5
-40
-50
-55
9. 5
20
±5
10
85
3
5
CM2B 1
CM2A 1
Unit s
oz / gm
kOhms
kOhms
C/Watt
VDC
V DC
VD C
VD C
VD C
mA
mA
Hrs
pF
%
C
C
C
C