49
A
(800) 678-9445 • FAX: (805) 388-0476
DESCRIPTION
The DGP20 Series is a high performance 20 watt triple output
DC/DC converter designed for battery and telecom applications.
Power densities of up to 11 watts per cubic inch provides system
flexibility. The extended 2:1 input voltage range allows operation
over a wide variety of sources from 9 to 72 volts.
FEATURES
• Triple Outputs
• Five Sided Shielded Case
• Remote ON/OFF
• Efficiencies to 84%
• -40°C to +85°C Operation
• 700Volt Isolation
• Extended Range Input (2:1)
TRIPLE OUTPUT
DGP20 SERIES
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
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NOTES
(1) All parameters measured at Tc = 25°C, nominal input voltage and full rated load unless otherwise noted.
Refer to the DC/DC Technical Reference Section for the definition of terms, measurement circuits and
other information.
(2) 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.
(3) The case thermal impedance is specified as the case temperature rise over ambient per package watt
dissipated.
(4) Case is tied to-Input, Pin 2.
1
BOTTOM VIEW SIDE VIEW
0.000
0.000
0.25
0.000
2.02
(51.31)
(6.35)
0.040 (1.02) DIA
7 PLACES
0.45
2.02
(11.43)
(51.31)
2
37
6
5
4
1.800
0.11
1.100
0.700
0.300
0.100
0.600
0.400
0.510
(7.62)
(2.54)
(13.0)
(17.78)
(15.24)
(10.16)
(27.94)
(45.72)
(2.8)
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51/5T42E02PGD 8163±,551052±,0052
21/5T84E02PGD 632721±,5013±,0052
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50
®
DGP20 SERIES - TRIPLE OUTPUT
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NOTES
(1) All parameters measured at Tc=25°C, nominal input voltage and full rated load unless otherwise noted.
Refer to the DC/DC Technical Reference Section for the definition of terms, measurement circuits and
other information.
(2) Noise is measured per DC/DC Technical Reference Section. Measurement bandwidth is 0-20 MHz for
peak-peak 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.
(3) Optimum performance is obtained when this power supply is operated within the minimum to
maximum load specifications.
(4) Output regulation is specified by simultaneously changing from minimum to maximum load and
noting the change in each output.
(5) Cross regulation is defined as the change in one output when the 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.
(6) Short term stability is specified after a 30 minute warmup at full load, constant line and recording the drift
over a 24 hour period.
DGP20 SERIES APPLICATION NOTES:
External Capacitance Requirements
No external capacitance is required for operation of the DGP20 Series.
However, for maximum performance, it is recommended that the
DGP20 Series use a capacitor of sufficient ripple current capacity
connected across the input pins 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 from at 220KHz is required. External output capacitance is
not required for operation, however it is recommended that 1mF to
10mF of tantalum and 0.001 to 0.1mF ceramic capacitance be
selected for reduced system noise. Additional output capacitance
may be added for increased filtering, but should not exceed 400mF.
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/
drain 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. The input capacitors are kept fully charged in the OFF mode.
For proper operation, do not drive this input 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 +8 volts applied.
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51
A
(800) 678-9445 • FAX: (805) 388-0476
DGP20 SERIES BLOCK DIAGRAM
4
+12/15V OUTPUT
+5V OUTPUT
SHIELDED ISOLATION TRANSFORMER
+
7
–12/15V OUTPUT
6
CMN
SHIELDED COPPER CASE
+
+
–
2
– INPUT
ON/OFF
1
3
+ INPUT CURRENT
MODE
PWM
LOW
NOISE
FILTER
5
+
3.5
2.8
2.1
1.4
0.7
0.008
64
100% LOAD
50% LOAD
2101214 16 18
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
85
80
75
70
65913
14 15 16 171211
100% FULL LOAD
50% FULL LOAD
10 18
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
90
85
80
75
70
65040
3020
LINE = 18VDC
LINE = 9VDC
LINE = 12VDC
10 50 60 70 80 90 100
12 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
2.0
1.5
1.0
0.5
0.0016
128
100% LOAD
50% LOAD
4202428 32 36
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
90
85
80
75
7018 26 28 30 32 342422
100% FULL LOAD
50% FULL LOAD
20 36
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
1.0
0.6
0.8
0.4
0.2
0.0040
3020
100% LOAD
50% LOAD
10 50 60 70 80
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
90
85
80
75
70
65
6036 52 56 60 64 684844
100% FULL LOAD
50% FULL LOAD
40 72
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
90
85
80
75
70
65040
3020
LINE = 72VDC
LINE = 36VDC
LINE = 48VDC
10 50 60 70 80 90 100
48 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
50
0
5
10
15
20
60 70 80 90 100
OUTPUT POWER DERATING
AMBIENT TEMPERATURE
POWER OUTPUT
DGP20 SERIES - TRIPLE OUTPUT
Typical Performance: (Tc=25°C, Vin=Nom VDC, Rated Load)
90
85
80
75
70
65040
3020
LINE = 36VDC
LINE = 18VDC
LINE = 24VDC
10 50 60 70 80 90 100
24 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
