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Features
DC/DC Converter
THD 12 Series 12 Watt
Models
Highest Power Density: 12W in
DIL-24 Package!
Wide 2:1 Input Range
Very high Efficiency up to 88%
I/O-Isolation 1500V
Input Filter meets EN55022A without
ext. Components
Remote on/off
Low Ripple and Noise
Continuous Short Circuit Protection
Operating Temp. Range
-40°C to +75°C (with Derating)
3 Year Product Warranty
The THD-12 series is a range of high performance, isolated 12W DC/
DC converters. They come in a low profile, DIL-24 package with stand-
ard industry pin-out. Overload and overvoltage protection as well as
remote on/off are included as standard. Built-in filters for both input and
output minimizes the need of external filtering. Full SMD-design with
exclusive use of ceramic capacitors guarantees a high reliability and
long product lifetime. Typical applications for these converters are
industrial electronics, instrumentation, data communication systems and
battery operated equipment with limited space
available on the PCB.
Order code Input voltage range Output voltage Output current max. Efficiency typ.
THD 12-1209 2.5VDC 3‘500 mA 82 %
THD 12-1210 3.3VDC 3‘500 mA 84 %
THD 12-1211 5.1VDC 2’400 mA 86 %
THD 12-1212 9 – 18 VDC 12 VDC 1’000 mA 86 %
THD 12-1213 15 VDC 800 mA 86 %
THD 12-1221 ± 5 VDC ±1’200 mA 82 %
THD 12-1222 ±12 VDC ± 500 mA 87 %
THD 12-1223 ±15 VDC ± 400 mA 87 %
THD 12-2409 2.5VDC 3‘500 mA 83 %
THD 12-2410 3.3VDC 3‘500 mA 85 %
THD 12-2411 5.1VDC 2’400 mA 87 %
THD 12-2412 18 – 36 VDC 12 VDC 1’000 mA 87 %
THD 12-2413 15 VDC 800 mA 87 %
THD 12-2421 ± 5 VDC ±1’200 mA 83 %
THD 12-2422 ±12 VDC ± 500 mA 88 %
THD 12-2423 ±15 VDC ± 400 mA 88 %
THD 12-4809 2.5VDC 3‘500 mA 83 %
THD 12-4810 3.3VDC 3‘500 mA 85 %
THD 12-4811 5.1VDC 2’400 mA 87 %
THD 12-4812 36 – 75 VDC 12 VDC 1’000 mA 87 %
THD 12-4813 15 VDC 800 mA 87 %
THD 12-4821 ± 5 VDC ±1’200 mA 83 %
THD 12-4822 ±12 VDC ± 500 mA 88 %
THD 12-4823 ±15 VDC ± 400 mA 88 %
Pending
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All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
Input Specifications
Input current (no load) 12 Vin models: t.b.a.
24 Vin models: t.b.a.
48 Vin models: t.b.a.
Input current (full load) 12 Vin; 2.5/ 3.3 & ±5 Vout models: 1’670 mA typ.
12 Vin; other single output models: 1’605 mA typ.
12 Vin; other dual output models: 1’630 mA typ.
24 Vin; 2.5/ 3.3 & ±5 Vout models: 840 mA typ.
24 Vin; other single output models: 800 mA typ.
24 Vin; other dual output models: 810 mA typ.
48 Vin; 2.5/ 3.3 & ±5 Vout models: 420 mA typ.
48 Vin; other single output models: 400 mA typ.
48 Vin; other dual output models: 405 mA typ.
Start-up voltage / 12 Vin models: 9VDC / 8 VDC
under voltage lockout 24 Vin models: 18 VDC / 16 VDC
48 Vin models: 36 VDC / 33 VDC
Input Surge voltage 12 Vin models: 36 V max.
(100 msec. max.) 24 Vin models: 50 V max.
48 Vin models: 100 V max.
Input voltage variation (dv/dt) 5 V / ms, max.
( complies ETS 300 132 part. 4.4)
Conducted noise (input) EN 55022 level A, FCC part 15, level A
ESD (input) EN 61000-4-2, Pref. Criteria B
Fast Transient (input) EN 61000-4-4, Pref. Criteria B
Surge (input) EN 61000-4-5, Pref. Criteria B
Output Specifications
Voltage set accuracy ±1.2 %
Regulation – Input variation Vin min. to Vin max. ± 0.5 % max.
– Load variation 10 – 100 %
– single output models 1.0 % max. (1.5% max. for 2.5 Vout models)
– dual output models balanced load 1.2 % max.
– dual output models unbalanced load 5.0 % max.
Transient response recovery time (25% load step change) 300 µs
Ripple and noise (20 MHz Bandwidth) 85 mVpk-pk max.
Temperature coefficient ± 0.02 % /K
Output current limitation 150% typ. of Iout max., constant current
Short circuit protection indefinite (automatic recovery)
Minimum load 10% of rated max current (operation at lower load
condition will not damage these converters, how-
ever, they may not meet all listed specifications)
Capacitive load 2.5 Vout & 3.3 Vout models: 2000 µF max.
5 Vout models/ ± 5 Vout models: 2000 µF max./ ± 1250 µF max.
12 Vout models /±12 Vout models: 430 µF max./ ± 200 µF max.
15 Vout models/±15 Vout models: 300 µF max./± 120 µF max.
DC/DC Converter
THD 12 Series 12 Watt
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All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
General Specifications
Temperature ranges – Operating –40 °C ... +75 °C (with derating)
– Case temperature +100 °C max.
– Storage –55 °C ... +105 °C
Derating 2.5%/K above 60°C
Humidity (non condensing) 95 % rel H max.
Reliability, calculated MTBF >2.75 Mio. h @ 40 °C
(BELLCORE TR-MWT-000332 Case I: 50% Stress)
Thermal shock MIL–STB–810D
Isolation voltage Input/Output 1‘500 VDC
Isolation capacity Input/Output 1’200 pF max.
Switching frequency (fixed) 400 kHz typ. (Pulse width modulation PWM)
Safety standards UL 60950, EN 60950, IEC 60950
(Operational Insulation)
Safety approvals UL/cUL File: t.b.a.
Remote on/off – ON: 3.0 ... 12 VDC or open circuit (referenced to -Vin)
– OFF:
0 ... 1.2 VDC or short circuit pin 1 and pin 2/3
– OFF idle current: 2.5 mA Physical Specifications
Physical Specifications
Case material Copper, Nickel plated
Baseplate Non conductive black plastic
Potting material Epoxy (UL94V-0 rated)
Weight 18 g (0.62 oz)
Soldering temperature max. 260 °C / 10 sec.
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Specifications can be changed without notice
Outline Dimensions mm (inches)
Jenatschstrasse 1 • CH-8002 Zurich • Switzerland
Tel. +41-1284 2911 • Fax +41-1201 1168 • e-mail: sales@traco.ch • internet: http://www.tracopower.com
Rev. 08/04
DC/DC Converter
THD 12 Series 12 Watt
2.0
(0.08)
25.4
(1.0)
20.3 (0.80)
2.54
(0.10)
31.8
(1.25)
10.2
15.24 (0.60)
9
11
22
23 2
3
16
14
Bottom view
15.24
(0.60)
5.08
2.5
3.8
Insulated Baseplate (0.10)
(0.15)
(0.20)
(0.40)
1
Pin diameter ø 0.5 ±0.05 (0.02 ±0.002)
Tolerances ±0.35 (0.014)
() = Inch
Pin-Out
Pin Single Dual
1
Remote on/off Remote on/off
2–Vin (GND) –Vin (GND)
3–Vin (GND) –Vin (GND)
9No function Common
11 No function –Vout
14 +Vout +Vout
16 –Vout Common
22 +Vin (Vcc) +Vin (Vcc)
23 +Vin (Vcc) +Vin (Vcc)
