TDD25 SERIES
DC - DC CONVERTER
23 ~ 25W SINGLE & DUAL OUTPUT
FEATURES
LOW COST
2:1 & 3:1 WIDE INPUT RANGE
I/O ISOLATION
INPUT Pi FILTER
SHORT CIRCUIT PROTECTION
HIGH PERFORMANCE
2 YEARS WARRANTY
MODEL LIST
MODEL NO.
INPUT
VOLTAGE
18~60 VDC
18~60 VDC
18~60 VDC
18~60 VDC
35~75 VDC
35~75 VDC
35~75 VDC
35~75 VDC
OUTPUT
OUTPUT
WATTAGE
VOLTAGE
Single Output Models
23 WATTS
25 WATTS
24 WATTS
25 WATTS
23 WATTS
25 WATTS
24 WATTS
25 WATTS
+3.3 VDC
+ 5 VDC
+ 12 VDC
+ 15 VDC
+3.3 VDC
+ 5 VDC
+ 12 VDC
+ 15 VDC
OUTPUT
CURRENT
7000 mA
5000 mA
2000 mA
1700 mA
7000 mA
5000 mA
2000 mA
1700 mA
EFF.
(min.)
78%
84%
84%
84%
78%
84%
84%
84%
TDD25 - 03S2
TDD25 - 05S2
TDD25 - 12S2
TDD25 - 15S2
TDD25 - 03S3
TDD25 - 05S3
TDD25 - 12S3
TDD25 - 15S3
Dual Output Models
TDD25 - 12D2
TDD25 - 15D2
TDD25 - 12D3
TDD25 - 15D3
18~60 VDC
18~60 VDC
35~75 VDC
35~75 VDC
25 WATTS
25 WATTS
25 WATTS
25 WATTS
12 VDC
15 VDC
12 VDC
15 VDC
1000 mA
850 mA
1000 mA
850 mA
84%
84%
84%
84%
www.chinfa.com
2007.08.30
sales@chinfa.com
TDD25 SERIES
SINGLE & DUAL OUTPUT
CIRCUIT SCHEMATIC
Block diagram for TDD25 series with single output
Vi +
Switching
Device
Vi -
Opto -
Isolation
Reference &
Error Amp.
Rectifier
Vo +
Vo -
PWM
Controller
ON / OFF
Trim
Block diagram for TDD25 series with dual output
Vi +
Rectifier
Switching
Device
Rectifier
Vi -
PWM
Controller
Opto -
Isolation
Reference &
Error Amp.
Vo +
com
Vo -
ON / OFF
Trim
www.chinfa.com
2007.08.30
sales@chinfa.com
TDD25 SERIES
SINGLE & DUAL OUTPUT
SPECIFICATION
All Specifications Typical At Nominal Line, Full Load, 25 C Unless Otherwise Noticed
o
GENERAL
Characteristics
Switching frequency
Isolation voltage
Isolation resistance
Ambient temperature
Case temperature
Derating
Storage temperature
Dimension
Cooling
Case material
Conditions
Vi nom, Io nom
Input / Output
Input / Output, @ 500VDC
3.3V & 5V model
12V, 15V & dual output model
Operating at Vi nom, Io nom
Vi nom
Non operational
L50.8 x W76.2 x H12
Free air convection
Metal
min.
1,500
100
-25
-25
typ.
200
max.
unit
KHz
VDC
M
+ 60
+ 71
+ 100
o
o
o
C
C
C
See derating curve
-40
+ 100
% /
o
C
C
mm
o
INPUT SPECIFICATIONS
Characteristics
Input voltage range
No load input current
Input voltage w/o damage
Startup voltage
Input filter
Conditions
Ta min ... T max,
a
Io nom
Vi = nom
Io nom
Io nom
Pi type
3:1 models
2:1 models
24V models
48V models
24V models
48V models
24V models
48V models
min.
18
35
typ.
24
48
48
15
10
max.
60
75
unit
VDC
VDC
mA
mA
65
80
16
30
VDC
VDC
VDC
VDC
OUTPUT SPECIFICATIONS
Characteristics
Output voltage accuracy
Minimum load
Line regulation
Load regulation
Transient recovery time
Temperature coefficient
Ripple & noise
Vi nom
Conditions
Vi nom, Io nom
single output models
dual output models (each output)
min.
0
10
typ.
max.
2
unit
%
%
%
Io nom, Vi min ...Vi max
Vi nom, Io 0 ... Io nom
,
single output models
Vi nom, Io min ... Io nom
,
dual output models
1
2
5
500
0.02
150
240
300
%
%
%
S
% /
o
C
mV
mV
mV
%
%
25% load, step changed
Vi nom, Io nom
Vi nom, Io nom,
BW = 20MHz
3.3V & 5V models
12V & 12V
Voltage trim range
Efficiency
Vi nom
15V & 15V
3.3V output models
5V, 12V, 15V & dual
5
10
Up to 84%, See model list
Vi nom, Io nom, Po / Pi
www.chinfa.com
2007.08.30
sales@chinfa.com
TDD25 SERIES
SINGLE & DUAL OUTPUT
SPECIFICATION
All Specifications Typical At Nominal Line, Full Load, 25 C Unless Otherwise Noticed
o
CONTROL AND PROTECTION
Remote ON / OFF
Input reversed
Output short circuit
ON: opened or 8 ~ 10VDC applied, reference to input GND
OFF: -0.3 ~ 2VDC applied, reference to input GND
Shunt diode built in, external fuse recommended
Continuous
MECHANISM & PIN CONFIGURATION
mm [inch]
76.20 [3.00]
6.35 [0.25]
63.50 [2.50]
5.08 [0.20]
10.16 [0.40]
15.24 [0.60]
6
2
7
12.00 [0.47]
5.00 [0.20]
DIA 1.00 [0.04]
10.16 [0.40]
10.16 [0.40]
3
20.32 [0.80]
5.08 [0.20]
8
10.16 [0.40]
9
10.16 [0.40]
5
BURL AT 4 CORNER
BOTTOM VIEW
10
PHYSICAL CHARACTERISTICS
CASE SIZE
CASE MATERIAL
WEIGHT
50.8 x 76.2 x 12 mm 2 x 3 x 0.47 inches
Metal
105 g
PIN ASSIGNMENT
GENERAL
PIN NO.
SINGLE
DUAL
2
Vi -
Vi -
3
Vi+
Vi+
5
ON / OFF
ON / OFF
6
N. C.
Vo -
7
N. C.
N. C.
8
Vo -
com
9
Vo +
Vo +
10
Trim
Trim
DERATING
100
Power out [ % ]
12V, 15V & dual
NATURAL
CONVECTION
COOLING
3.3V & 5V
0
-25
www.chinfa.com
2007.08.30
60
Ambient Temperature [
o
C ]
71
100
sales@chinfa.com
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