DFC25 SERIES – TRIPLE OUTPUT
Input Parameters (1)
Model
Reflected Ripple (2)
Input Current
Full Load
No Load
Inrush Current (5)
Efficiency
Switching Frequency
Maximum Input
Overvoltage,
100ms Maximum
Turn-on Time,
1% Output Error
TYP
TYP
TYP
MAX
TYP
TYP
MAX
TYP
DFC25E24T5/12
230
1563
10
50
80
150
45
10
DFC25E24T5/15
230
1563
10
50
80
150
45
10
DFC25E48T3.3/12
150
890
10
50
78
150
85
10
DFC25E48T5/12
150
781
10
50
80
150
85
10
Units
mA
PP
mA
A
PK
%
kHz
VDC
mS
Output Parameters (1)
Model
Output (8)
Output Voltage
Output Voltage Accuracy
MIN
TYP
MAX
MIN
MAX
TYP
TYP
TYP
TYP
TYP
TYP
TYP
TYP
TYP
DFC25EXXT3.3/XX
V1
3.3
3.27
3.30
3.33
0.5
5.0
1.0
0.2
3.0
2
<0.05
<0.1
>40
75
100
DFC25EXXT5/XX
V1
5
5.05
5.10
5.15
0.5
5.0
1.0
0.2
3.0
2
<0.05
<0.1
>40
75
100
DFC25EXXTX/12
V2,V3
12
11.88
12.00
12.12
0.0
1.0
8.0
3.0
8.0
2
<0.05
<0.1
>40
120
300
DFC25EXXTX/15
V2,V3
15
14.85
15.00
15.15
0.0
0.8
8.0
3.0
8.0
2
<0.05
<0.1
>40
150
300
VDC
VDC
Units
Rated Load Range
Load Regulation
25% Load - Max Load
Line Regulation
Vin = Min-Max VDC
Cross Regulation
25% Load - Max Load (6)
Transient Response
25% Load Step (7)
Short Term Stability (3)
Long Term Stability
Input Ripple Rejection (4)
Noise, Peak - Peak (2)
Temperature Coefficient
Short Circuit Protection
from +OUT to -OUT
A
%
%
%
%
%/24Hrs
%/kHrs
dB
mV
PP
ppm/°C
Continuous Current Limit Protection on 3.3V or 5V outputs,
Momentary Current Limit Protection on 12V or 15V outputs
DFC25 SERIES APPLICATION NOTES:
External Capacitance Requirements
A low ESR external capacitance is required for operation of the DFC25 Series. For maximum
performance, it is recommended that the DFC25 Series uses a capacitor of sufficient ripple current
capacity connected across the input pins, especially if a capacitive input source is farther than 1"
from the converter. To meet the reflected ripple requirements of the converter, an input impedance
of less than 0.09 Ohms at 200 kHz is required. 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 each output to reduce system noise. 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 TTL compatible circuitry. When the ON/OFF pin is pulled low with respect to the
-INPUT, the converter is placed in a low power drain state. The input capacitors are kept fully
charged in the OFF mode. For proper operation, this input may be driven from a logic gate directly.
The ON/OFF pin should never be pulled more than 0.3 volts below -INPUT or have a voltage
greater than +6 volts applied.
NOTES
(1) All All parameters measured at Tc=25°C, nominal input voltage and full rated load unless otherwise
noted.
(2) Measurement bandwidth is 0-20 MHz for peak-peak measurements, 10 kHz to 1 MHz for RMS
measurements. Output noise is measured with a 0.01µF/100V ceramic capacitor in parallel with a
1µF/35V Tantalum capacitor, 1 inch from the output pins to simulate standard PCB decoupling
capacitance.
(3) Short term stability is specified after a 30 minute warm-up at full load, constant line and recording
the drift over a 24 hour period.
(4) The transient response is specified as the time required to settle from a 50 to 75% step load change
(rise time of step = 2µSec) to a 1% error band.
(5) Per ETSI-300-132
(6) Change to main channel output for a 25% to 100% change on dual outputs or change on dual
channel outputs due to a 25% to 100% change on the main channel output.
(7) Recovery to within 1% in less than 1 millisecond after transient has been applied.
(8) V3 is defined as the minus, or negative output. Values in the chart are shown as positive for V2, and
can be assumed negative for V3.
NUCLEAR AND MEDICAL APPLICATIONS Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous environments,
or nuclear control systems without the express written consent of the President of Power-One, Inc.
TECHNICAL REVISIONS The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are
subject to change without notice.
2
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