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DC/DC Converters
THN 20WI Series, 20 Watt
Features
◆ Ultra compact size: 1.0” x 1.0” x 0.4”
◆ Shielded metal case with isolated
baseplate
◆ Ultrawide 4:1 input voltage ranges
◆ Very high efficiency up to 90%
◆ Output voltage adjustable
◆ Remote On/Off control
◆ Operating temp. range –40°C to +75°C
and up to 85 °C with heat-sink
◆ I/O isolation voltage 1500 VDC
◆ Input filter meets EN 55032 class A
without external components
◆ No minimum load required
◆ Lead free design, RoHS compliant
◆ 3-year product warranty
The THN 20WI series models are high performance dc-dc converters. They achieve
20 Watt output power and come in a small size metal casing (1.0” x 1.0” x 0.4”).
The models feature an ultra-wide 4:1 input voltage range while the output voltages
are precisely regulated even under no load conditions. Highest efficiency of up to
90% makes this product very reliable and applicable in temperature ranges of up to
85°C. The low no-load input current characteristics and the remote On/Off control
make these converters an ideal solution for battery operated systems. Typical ap-
plications are in mobile equipment, instrumentation, distributed power architectures
in communication and industrial electronics and everywhere where space on the
PCB is critical.
Order code Input voltage range Output voltage Output current max. Efficiency typ.
THN 20-2410WI 3.3 VDC 4500 mA 86 %
THN 20-2411WI
THN 20-2411WI-A1
5.0 VDC
5.0 VDC *1
4000 mA
4000 mA
89 %
89 %
THN 20-2412WI 12 VDC 1670 mA 89 %
THN 20-2413WI 9 – 36 VDC 15 VDC 1330 mA 89 %
THN 20-2415WI (24 VDC nominal) 24 VDC 833 mA 91 %
THN 20-2422WI ±12 VDC ±833 mA 89 %
THN 20-2423WI ±15 VDC ±667 mA 89 %
THN 20-2425WI ±24 VDC (48 VDC) *2 ±417 mA 91 %
THN 20-4810WI 3.3 VDC 4500 mA 86 %
THN 20-4811WI
THN 20-4811WI-A1
5.0 VDC
5.0 VDC *1
4000 mA
4000 mA
89 %
89 %
THN 20-4812WI 12 VDC 1670 mA 89 %
THN 20-4813WI 18 – 75 VDC 15 VDC 1330 mA 90 %
THN 20-4815WI (48 VDC nominal) 24 VDC 833 mA 91 %
THN 20-4822WI ±12 VDC ±833 mA 89 %
THN 20-4823WI ±15 VDC ±667 mA 89 %
THN 20-4825WI ±24 VDC (48 VDC) *2 ±417 mA 91 %
Models
CB
Scheme
UL 60950-1UL 60950-1
*1 Adjustable output up to 6 VDC
*2 The outputs can also be used in serial circuit for single 48 VDC operation.
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DC/DC Converters
THN 20WI Series 20 Watt
Input Specifications
Input current at no load – 24 Vin 3.3, 5.0, 24 Vout models: 10 mA typ.
(at nominal input voltage) 12, 15, ±12, ±15 Vout models: 6 mA typ.
±24 Vout models: 12 mA typ.
– 48 Vin 3.3, 5.0, ±24 Vout models: 10 mA typ.
24 Vout models: 8 mA typ.
all other models: 4 mA typ.
Start-up voltage / under voltage shut down 24 Vin models: 9 VDC / 8 VDC
48 Vin models: 18 VDC / 16 VDC
Surge voltage (1 s max.) 24 Vin models: 50 V max.
48 Vin models: 100 V max.
Reflected input ripple current 30 mAp-p typ.
Conducted noise (input) EN 55032 class A, FCC part 15, level A
without external components
– Filter proposal for compling to EN 55032 class B www.tracopower.com/overview/thn20wi
ESD (electrostatic discharge) EN 61000-4-2, air ±8 kV, contact ±6 kV,
perf. criteria A
Radiated immunity EN 61000-4-3, 10 V/m, perf. criteria A
Fast transient / Surge EN 61000-4-4, ±2 kV, perf. criteria A
EN 61000-4-5, ±2 kV perf. criteria A
With external input capacitor e.g. Nippon
chemi-con KY 200 µF, 100 V, ESR 48 mOhm
Conducted immunity EN 61000-4-6, 10 Vrms, perf. criteria A
Output Specifications
Voltage set accuracy ±1 %
Output voltage adj. range 5.0 Vout A1 models: –10 to +20 %
24 Vout models: –10 to +20 %
all other models: ±10 % only for single output models
– For further information see application note
www.tracopower.com/overview/thn20wi
Regulation – Input variation (Vmin – Vmax) single output models: 0.2 % max.
dual output models: 0.5 % max.
– Load variation (0 – 100 %) single output models: 0.2 % max.
dual output models balanced load: 1.0 % max.
dual output models unbalanced load (25% /100%): 5.0 % max.
Minimum load not required
Ripple and noise (20 MHz bandwidth) single output models: 75 mVp-p typ.with external capacitor
dual output models: 100 mVp-p typ. with external capacitor
– For further information see application note
www.tracopower.com/overview/thn20wi
Temperature coefficient ±0.02 %/K
Output current limitation typ. 150 % of Iout max., Hiccup
Short circuit protection continuous, automatic recovery
Over voltage protection 3.3 Vout models: 3.7 – 5.4 VDC
5.0 Vout models: 5.6 – 7. 0 VDC
5.0 Vout A1 models: 6.3 – 7.4 VDC
12 Vout models: 13.5 – 19.6 VDC
15 Vout models: 16.8 – 20.5 VDC
24 Vout models: 29.1 – 32.5 VDC
Start up time (nominal Vin and constant resistive load) 30 ms typ. (for power on and remote on)
Transient response setting time 250 µs typ. (25% load step change)
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All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
DC/DC Converters
THN 20WI Series 20 Watt
General Specifications
Temperature ranges – Operating without heat sink –40°C to +75°C (with derating)
– Operating with heat sink –40°C to +85°C (with derating)
– Case temperature +105°C max.
– Storage –55°C to +125°C
Power derating – Operating without heat sink 2.0 %/K above 60°C
– Operating with heat sink 2.0 %/K above 70°C
Thermal impedance – Natural convection 17.6°C/W
– Natural convection with heat sink 14.8°C/W
Humidity (non condensing) 5 % to 95 % rel H max.
Reliability, calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >1.4 Mio. h
Isolation voltage (60 s) – Input/Output 1’500 VDC
Isolation capacitance – Input/Output 1000 pF typ.
Isolation resistance – Input/Output (500 VDC) >1’000 MOhm
Remote On/Off – On: 3.0 ... 15 VDC or open circuit
– Off: 0 ... 1.2 VDC or short circuit pin 6 and pin 2
– Off idle current: 1.5 mA
Switching frequency (fixed) 330 kHz typ. (pulse width modulation PWM)
Vibration and thermal shock EN 61373, MIL-STD-810F
Safety standards – UL/cUL UL 60950-1, 2nd Edition, 2007-03-27
CSA C22.2 No. 60950-1-07, 2nd Ed. 2007-03
– CB IEC 60950-1:2005 (2nd Edition); Am 1:2009
EN 60950-1:2006/A11:2009/A1:2010
– Certification documents www.tracopower.com/overview/thn20wi
Physical Specifications
Casing material nickel coated copper
Baseplate non conductive FR4
Potting material silicone (UL 94V-0 rated)
Weight 15 g (0.53 oz)
Soldering temperature 265°C / 10 s max.
Environmental compliance – Reach www.tracopower.com/info/reach-declaration.pdf
– RoHS RoHS directive 2011/65/EU
Supporting Documents: www.tracopower.com/overview/thn20wi
Output Specifications (continued)
Max. capacitive load 3.3 Vout models: 7’000 µF
5 Vout models: 5’000 µF
12 Vout models: 850 µF
15 Vout models: 700 µF
24 Vout models: 220 µF
±12 Vout models: 500 µF (each output)
±15 Vout models: 350 µF (each output)
±24 Vout models: 100 µF (each output)
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Specifications can be changed without notice! Make sure you are using the latest documentation, downloadable at www.tracopower.com
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DC/DC Converters
THN 20WI Series 20 Watt
Outline Dimensions
Dimensions in [mm], () = Inch
Pin diameter ø 1.0 (0.04)
Pin pitch tolerances: ±0.25 (±0.01)
Tolerances: ±0.5 (±0.02)
Rev. March 26. 2018
Pin Single Dual
1+Vin (Vcc) +Vin (Vcc)
2–Vin (GND) –Vin (GND)
3+ Vout + Vout
4Trim Common
5–Vout –Vout
6Remote On/Off
Pin-Out
Note:
The product label on converter has to be re-
moved before mounting the heat-sink.
For volume orders converters will be sup-
plied with heat-sink already mounted. Please
contact factory for quotation.
Separate heat-sinks are only available for
prototypes and small quantity orders.
Order code: THN-HS1
(cont.: heat-sink, thermal pad, 2 clamps)
Material: Aluminum
Finish: Anodic treatment (black)
Weight: 8 g (0.28oz) without converter
Thermal impedance after assembling: 14.8 K/W
Heat-Sink (Option)
31.0 (1.22) max.
14.5 (0.57)
16.5 (0.65)
max.
Converter
Heat-sink
Thermal pad
Clamp
25.4
25.4
Bottom view
20.32
7.62
5.6
(0.3)
(0.22)
(0.8)
(1.0)
(1.0)
5.08
(0.2)
9.9
(0.39)
1
2
3
6
5
2.5
(0.1)
4
10.16
(0.4)
2.5
(0.1)
10.16
(0.4)
