DC/DC Converters
ctparts.com
SPECIFICATIONS
Wide Input Regulated & Non-Isolated
3W~9W Output, Single Output
CTDD2727DF-S Series
Part
Number
CTDD2727DF-0305-S-3
CTDD2727DF-0712-S-3
CTDD2727DF-0724-S-3
CTDD2727DF-1203-S-3
CTDD2727DF-1205-S-3
CTDD2727DF-2403-S-3
CTDD2727DF-2405-S-3
CTDD2727DF-0705-S-5
CTDD2727DF-0712-S-5
CTDD2727DF-1205-S-5
CTDD2727DF-1209-S-5
CTDD2727DF-2405-S-5
CTDD2727DF-0712-S-9
Vin
Nom.
(VDC)
3.3
7.2
7.2
12
12
24
24
7.2
7.2
12
12
24
7.2
Input Range
(VDC)
2.7-5.4
6.4-8.4
6.4-8.4
9-18
9-18
18-35
18-35
6.4-8.4
6.4-8.4
9-18
9-18
18-35
6.4-8.4
Vin
Max.*
(VDC)
5.4
10
10
20
20
35
35
10
10
20
20
35
10
Vout
(VDC)
5
12
24
3.3
5
3.3
5
5
12
5
9
5
12
Iout
Max.
(mA)
150
250
100
900
600
900
600
1000
417
1000
550
1000
750
Iout
Min.
(mA)
15
25
10
90
60
90
60
100
42
100
55
100
75
Effi.
Typ.
(%)
80
81
82
79
81
79
80
85
85
85
87
85
86
Not shown at actual size.
Compliant
RoHS
*If Input voltage above specified may cause permanent damage to the device
ISOLATION SPECIFICATIONS
Item
Isolation Voltage
Isolation Resistance
Test Condition
Flash tested for 1 minute
Test at 500VDC
MIN
0
0
TYP
MAX
Units
VDC
MΩ
OUTPUT SPECIFICATIONS
FEATURES
Efficiency:
To 85%
Temperature Range:
-20°C to +71°C
Package:
UL94-V0
Miscellaneous:
Wide (2:1) Input Range. No heat sink required.
Industry Standard Pinout. Single Output. Custom service
available.
Samples available.
Item
3W Output Power
Positive voltage accuracy
Load regulation
Line regulation
Temperature drift (Vout)
Ripple
Noise
Refer to Recommended Circuit
From 10% to 100% load
Input Voltage from low to high
Refer to Temp. Derating Graph
20Hz to 300kHz Bandwidth
DC-20MHz Bandwidth
30
80
Test Condition
MIN
0.3
TYP
MAX
3
±3
±0.5
±0.3
0.03
50
150
Units
W
%
%
%
%/°C
mVp-p
mVp-p
CHARACTERISTICS
Output Short Circuit Protection:
Continuous
Temperature Rise at Full Load:
30°C (Typ.)
Cooling:
Free air convection
No Load, Power Consumption:
500mW (typical)
Operating Temperature Range:
-20°C to +71°C
Storage Temperature Range:
-55°C to +125°C
Lead Temperature:
300°C (1.5mm from case for 10 seconds)
Storage Humidity Range:
< 95%
Case Material:
Plastic (UL94-V0)
MTBF:
>3,500,000 hours
Miscellaneous:
RoHS Compliant.
Switching frequency
100% load, nominal input voltage
100
400
KHz
Note:
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output unless
otherwise specified.
TYPICAL CHARACTERISTICS
Temperature Derating Graph
120
Output Power (%)
100
80
60
40
20
0
-40
0
120
40
71 85
Ambient Temperature (°C)
Safe Operating Area
01.05.07
Technologies
Manufacturer of Passive and Discrete Semiconductor Components
800-684-5322
Inside US
949-453-1811
Outside US
Copyright © 2006 by CT Magnetics, DBA Central Technologies. All rights reserved.
CT Magnetics reserves the right to make improvements or change specifications without notice
CENTRAL
DC/DC Converters
ctparts.com
CTDD2727DF-S Series
Wide Input Regulated & Non-Isolated
3W~10W Output, Single Output
OUTLINE DIMENSIONS & RECOMMENDED FOOTPRINT DETAILS
CTDD2727DF-S Package
27.50
9.00
4.00
20.32
4
3
Side
View
27.50
1 2
Top View
CTDD2727DF-S Footprint
1.60ø+0.15/-0
2.54
4
3
1
2
2.54
Note: All Pins on
a
2.54m pitch;
all
pin diameters
are
0.50mm;
all
dimensions in mm.
PIN CONNECTIONS
Pin Function
1
2
3
4
COM
Vin
+Vo
NC
3
2 1
4
Bottom View
RECOMMENDED CIRCUIT
All the CTDD2727DF-S
Series
have
been
tested
according
to the following recommended testing circuit
before
leaving
factory. This
series should be
tested
under
load. Never
be
tested
under
no load (See figure 1 & 2). If you want to further
decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, the
capacitance
should
not
be
too high (See table 1). If you want to
use
the products in high EMI, please choose our metal
packagedproducts.
External Capacitor Table (table 1)
Figure 2
Vin
5V
&
12V
24V
&
48V
C
in
C
out
(0+70°C)
C
out
(-40+85°C)
Figure 1
lp
Input Current (A)
100µF
100µF
(electrolytic
capacitor)
47µF
(tantalum
capacitor)
Vin
DC-DC
+
100µF
25V
100µF
25V
+ Vout
Load
10µF
GND
Input Voltage
Range
Input Voltage (V)
GND
01.05.07
Technologies
Manufacturer of Passive and Discrete Semiconductor Components
800-684-5322
Inside US
949-453-1811
Outside US
Copyright © 2006 by CT Magnetics, DBA Central Technologies. All rights reserved.
CT Magnetics reserves the right to make improvements or change specifications without notice
CENTRAL
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