DFA20E12D5 POWER ONE, DFA20E12D5 Datasheet - Page 3

• Manufacturer Part Number: DFA20E12D5
• Description: CONVERTER DC-DC 20W +5V/-5V DUAL
• Manufacturer: POWER ONE
• Series: DFA20r
• Type: Isolatedr

Specifications of DFA20E12D5

• Output: ±5V
• Number Of Outputs: 2
• Power (watts): 20W
• Mounting Type: Through Hole
• Voltage - Input: 9 ~ 18V
• Package / Case: 7-DIP Module
• 1st Output: 5 VDC @ 1.7A
• 2nd Output: -5 VDC @ 1.7A
• Size / Dimension: 2.02" L x 2.02" W x 0.45" H (51.3mm x 51.3mm x 11.4mm)
• Power (watts) - Rated: 20W
• Operating Temperature: -50°C ~ 100°C
• Efficiency: 81%
• Approvals: CE, cUL, EN, TUV, UL
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 4th Output: -
• Other names: 179-1044

+ INPUT
MCD10174 Rev. 1.0, 15-Jun-10
– INPUT
ON/OFF
NOTES
(1) All parameters measured at Tc=25°C, nominal input voltage and
(2) Noise measurement bandwidth is 0-20 MHz for peak-peak
(3) Load regulation for the outputs is specified as the voltage change
(4) Cross regulation is defined as the change in one output when the
(5) Short term stability is specified after a 30-minute warmup at full
(6) The input ripple rejection is specified for DC to 120 Hz ripple with
DFA20 SERIES APPLICATION NOTES:
External Capacitance Requirements
No external capacitance is required for operation of the
DFA20 Series. The use of input capacitors with less than
0.5V ESR may cause peaking in the input filter and
degrade filter performance. External output capacitance
is not required for operation, however it is recommended
that 1μF to 10μF of tantalum and 0.001 to 0.1μF ceramic
capacitance be selected for reduced system noise.
full rated load unless otherwise noted.
measurements, 10 kHz to 1 MHz for RMS measurements. Output
noise is measured with a 1μF tantalum located 1" away from the
converter to simulate PCB standard decoupling. Input reflected
ripple is measured into a 1 μH source impedance.
when both outputs are changed from maximum to minimum at the
same time.
other output is changed from full load to 25% of full load. The
converter can be run at no load on either or both outputs with no
damage.
load, constant line and recording the drift over a 24-hour period.
a modulation amplitude of 1% of Vin.
1
2
3
FILTER
NOISE
LOW
THERMAL LIMIT
CURRENT
MODE
PWM
DFA20 SERIES BLOCK DIAGRAM
SHIELDED ISOLATION TRANSFORMER
SHIELDED COPPER CASE
+
–
DFA20 Dual-Output DC-DC Series Data Sheet
+
+
Page 3 of 4
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5
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7
Additional output capacitance may be added for
increased filtering, but should not exceed 400μF.
Remote ON/OFF Operation
The remote ON/OFF pin may be left floating if this
function is not used. It is recommended to drive this pin
with an open collector arrangement or a relay contact.
When the ON/OFF pin is pulled low with respect to the -
INPUT, the converter is placed in a low power drain state.
Output TRIM
The TRIM pin may be used to adjust the output ±5% from
the nominal setting. This function allows adjustment for
voltage drops in the system wiring. Figure 1 shows the
proper connections to use this function.
function is not required, the pin may be left floating.
+OUT
-OUT
TRIM
CMN
– OUTPUT
TRIM
+ OUTPUT
USING TRIMPOT
4
7
6
10K
LOAD
Figure 1.
20
15
10
5
0
50
+OUT
-OUT
TRIM
USING FIXED RESISTORS
OUTPUT POWER DERATING
AMBIENT TEMPERATURE
60
4
7
6
www.power-one.com
70
TRIM
DOWN
TRIM
UP
80
If the TRIM
90
LOAD
100