For more information, please visit the
product page.
rev.
page
date
1 of 4
06/2009
PART NUMBER:
PTK25
DESCRIPTION:
dc-dc converter
MODEL
1
PTK25-D24-S3
PTK25-D24-S5
PTK25-D24-S12
PTK25-D24-S15
PTK25-D24-D5
PTK25-D24-D12
PTK25-D24-D15
PTK25-D24-T312
PTK25-D24-T512
PTK25-D24-T315
PTK25-D24-T515
PTK25-D48-S3
PTK25-D48-S5
PTK25-D48-S12
PTK25-D48-S15
PTK25-D48-D5
PTK25-D48-D12
PTK25-D48-D15
PTK25-D48-T312
PTK25-D48-T512
PTK25-D48-T315
PTK25-D48-T515
D
NOTE:
1. All models are also available in an extended temperature range of -40°C~85°C. For these models, append “M” to the model number, e.g.
PTK25-Q48-S5M.
2. Ripple & noise measured with a 20MHz bandwidth, off a 10uF electrolytic and a 0.1uF ceramic cap in parallel at the ouptut.
is
output
power
(max)
19.8W
25.0W
24.0W
24.0W
25.0W
24.0W
24.0W
19.95W
25.9W
19.95W
25.0W
19.8W
25.0W
24.0W
24.0W
25.0W
24.0W
24.0W
19.95W
25.9W
19.95W
25.0W
input
voltage
in
u
output
voltage
3.3VDC
5VDC
12VDC
15VDC
±5VDC
±12VDC
±15VDC
3.3VDC/±12VDC
5VDC/±12VDC
3.3VDC/±15VDC
5VDC/±15VDC
3.3VDC
5VDC
12VDC
15VDC
±5VDC
±12VDC
±15VDC
3.3VDC/±12VDC
5VDC/±12VDC
3.3VDC/±15VDC
5VDC/±15VDC
output
current
(max)
6.0A
5.0A
2.0A
1.6A
2.5A
1.0A
0.8A
3.5A/0.35A
3.5A/0.35A
3.5A/0.28A
3.5A/0.25A
6.0A
5.0A
2.0A
1.6A
2.5A
1.0A
0.8A
3.5A/0.35A
3.5A/0.35A
3.5A/0.28A
3.5A/0.25A
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
18-36VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
36-72VDC
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
co
nt
ed
ripple & noise
2
mV P-P
100
100
120
150
75/75
120/120
150/150
75/120/120
75/120/120
75/150/150
75/150/150
100
100
120
150
75/75
120/120
150/150
75/120/120
75/120/120
75/150/150
75/150/150
efficiency
(typ.)
80%
85%
89%
89%
84%
88%
87%
83%
84%
83%
84%
81%
85%
89%
89%
84%
88%
87%
83%
84%
83%
84%
features
·industry standard pin out
·wide 2:1 input range
·fully isolated
·output voltage trimmable
·output on/off control
·over-current protection
·over-voltage protection
·six-sided EMI shielding
·constant switching frequency
·high efficiency
·compact size 2.0”x2.0”x0.4”
·-40°C~85°C models available
·3 year warranty
For more information, please visit the
product page.
rev.
page
date
2 of 4
06/2009
PART NUMBER:
PTK25
DESCRIPTION:
dc-dc converter
INPUT
parameter
input voltage range
remote on/off control
conditions/description
min
18
36
2.5V
0V
nom
24
48
(open)
(short)
300
max
36
72
5.5V
0.8V
units
VDC
VDC
switching frequency
constant
NOTE:
3 output defaults to “on” when there is no connection to the “CNT” pin.
OUTPUT
parameter
output trim range
set point accuracy
PROTECTION
GENERAL
is
parameter
efficiency
isolation voltage
insulation resistance
agency standards
case material
material flammability
weight
co
parameter
conditions/description
min
5
over-current
continuous auto recovery
105%
5
over-voltage
internally zener clamped
110%
NOTE:
5 continuous operation in a protected state may compromise long-term reliability.
nt
conditions/description
min
nom
max
units
with external trim resistors
-5%
+5%
single output
-2%
+2%
dual output
-3%
+3%
line regulation
single output models
-0.25%
+0.25%
(low line to high line)
dual output models
-2.5%
+2.5%
triple: main output (Vout)
-0.25%
+0.25%
auxillary outputs (+Vaux / -Vaux)
-5%
+5%
load regulation
single output models- no load to full load
-0.25%
+0.25%
dual output models- balanced loads
-2.5%
+2.5%
triple: main output (Vout)
-0.25%
+0.25%
auxillary outputs (+Vaux / -Vaux)- with 10%
-5%
+5%
load on Vout and balanced loads on+Vaux and -Vaux
minimum load
converters will not be damaged if loading conditions are less than minimum specified loads,
but regulation specs may not be met
4
ripple and noise
see chart
NOTE:
4 single output: no min. load required, dual: 10%, triple: balanced loads
in
u
nom
max
135%
140%
max
83%
D
MTBF
operating temperature
storage temperature
humidity
washability
conditions/description
min
nom
typical at full load
77%
input/case, input/output, output/case
500
at 500 VDC
100M
approved to UL60950(E222889), CSA C22.2 No. 60950, TUV EN60950
Zn
94 V-0
80
(2.82)
MIL-HDBK-217F
470k
regular models - see derating curve.
-20
extended temperature models
-40
-40
operating (non-condensing)
5%
not intended for aqueous wash
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
ed
KHz
units
units
VAC
Ohms
(single output only)
grams
(ounces)
hours
+71
°C
+85
°C
+105
°C
95%
RH
output
output turn-off
turn-on
3
For more information, please visit the
product page.
rev.
page
date
3 of 4
06/2009
PART NUMBER:
PTK25
DESCRIPTION:
dc-dc converter
DIMENSIONS (mm)
NOTES
1. All dimensions are in inches and(mm).
2. Weight : 75g or less
0.3±0.5
(7.5)
PIN DEFINITIONS
DERATING CURVES
D
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
is
co
nt
in
u
PCB Layout
* Mounting hole top view
ed
For more information, please visit the
product page.
rev.
page
date
4 of 4
06/2009
PART NUMBER:
PTK25
DESCRIPTION:
dc-dc converter
APPLICATION NOTES
1. OUTPUT TRIMMING
The output voltages are preset to nominal values as indicated by the models table at the factory. If desired, the output voltage may
optionally be trimmed to a different value (+/- 10%) with external resistors and/or potentiometer as shown below.
+Vin
FIGURE 1. TRIMMING WITH
EXTERNAL POTENTIOMETER
+Vo
Trim
10KW
Trimpot
-Vin
To trim the output voltage with fixed resistors, the output voltage can be calculated as follows.
+Vin
+Vo
in
u
+Vin
+Vo
R load
-Vo
Trim
R trim-up
ed
R load
R trim-down
R load
Trim
-Vin
nt
=
47.94 KΩ
-Vo
-Vin
-Vo
Trim-Up
Trim-Down
(V
o
- V
r
) · R
1
· R
2
V
r
· R
1
- (V
o
- V
r
) · R
2
FIGURE 2: TRIM-UP VOLTAGE SETUP
FIGURE 3: TRIM-DOWN VOLTAGE SETUP
The value of
R
trim-up
is defined as:
co
as follows:
R
trim_up
=
V
r
· R
1
· R
2
R
2
· (V
o
- V
r
) - V
r
· R
1
R
trim_down
=
The value of
R
trim-down
is defined as:
Where:
R
trim-down
is the external resistor in
K
Ω
.
V
o
is the
desired output voltage.
R
1
and
R
2
and
V
r
are internal to
the unit and are defined in Table 1. For example to trim down
the PTK25-D5-D12 down by 5% to 22.8 V,
R
trim-down
is calculated
as follows:
Where:
R
trim-up
is the external resistor in
K
Ω
.
V
o
is the
desired output voltage.
R
1
and
R
2
and
V
r
are internal to
the PTK25-D5-D12 up by 5% to 25.2 V,
R
trim-up
is calculated
is
the unit and are defined in Table 1. For example to trim up
V
o
= 25.2 /
R
1
= 21 KΩ /
R
2
= 2.43 KΩ
/
V
r
= 2.5
2.5 · 21 · 2.43
2.43 · (25.2 - 2.5) - 2.5 · 21
V
o
= 22.8 /
R
1
= 21 KΩ /
R
2
= 2.43 KΩ
/
V
r
= 2.5
D
R
trim_up
=
R
trim_down
=
(22.8 - 2.5) · 21 · 2.43
2.5 - 2.1 (22.8 - 2.5) · 2.43
=
326.68 KΩ
Table 1
R1 (KΩ) R2 (KΩ) Vr (V)
Model
1.13
0.68
1.25
PTK25-DXX-S3.3
2.43
2.43
2.5
PTK25-DXX-S5
PTK25-DXX-S12
9.31
2.43
2.5
PTK25-DXX-S15
12.1
2.4
2.5
PTK25-DXX-D5
7.32
2.43
2.5
PTK25-DXX-D12
21
2.43
2.5
PTK25-DXX-D15
26.7
2.43
2.5
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
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