http://www.tracopower.com Page 1 of 4
DC/DC Converters
THN 20WI Series, 20 Watt
Features
Smallest encapsulated 20W Converter!
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 55022 class A
without external components
No minimum load required
Lead free design, RoHS compliant
3-year product warranty
The THN-20WI series is the latest generation of high performance dc-dc converter
modules with highest power density. The product achieves 20W output power while
it comes in a metal case with dimensions of only 1.0”x 1.0”x 0.4”.
All models have an ultra wide 4:1 input voltage range and precisely regulated
output voltages, even under no load conditions. Highest efficiency of up to 90%
makes this product very reliable and applicable in temperature ranges of up to
75°C or 8C with optional mounted heat sink. Together with low input current
characteristics at minimal load and remote On/Off control these converters are
the ideal solution for battery-operated systems. Typical applications are in mobile
equipments, 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 5.0 VDC 4000 mA 89 %
THN 20-2412WI 9 – 36 VDC 12 VDC 1670 mA 89 %
THN 20-2413WI (24 VDC nominal) 15 VDC 1330 mA 89 %
THN 20-2422WI ±12 VDC ±833 mA 89 %
THN 20-2423WI ±15 VDC ±667 mA 89 %
THN 20-4810WI 3.3 VDC 4500 mA 86 %
THN 20-4811WI 5.0 VDC 4000 mA 89 %
THN 20-4812WI 18 – 75 VDC 12 VDC 1670 mA 89 %
THN 20-4813WI (48 VDC nominal) 15 VDC 1330 mA 90 %
THN 20-4822WI ±12 VDC ±833 mA 89 %
THN 20-4823WI ±15 VDC ±667 mA 89 %
Models
CB
Scheme
UL 60950-1UL 60950-1
pending
http://www.tracopower.com Page 2 of 4
DC/DC Converters
THN 20WI Series 20 Watt
Input Specifications
Input current at no load (at nominal input voltage) 24 V models: 6 mA typ.
48 V models: 4 mA typ.
Input current at full load (at nominal input voltage) 24 V; 3.3 VDC models: 760 mA typ.
24 V; other models: 980 mA typ..
48 V; 3.3 VDC models: 380 mA typ.
48 V; other models: 490 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 sec. 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 55022 class A, FCC part 15, level A
without external components
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 ±10 % for single output models only.
Trim up via resistor over Trim and -Vout
Trim down via resistor over Trim and +Vout
(Resistor values tba, 0 Ohm=max. adjustment)
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) 3.3 & 5.0 VDC models: 75 mVp-p typ.
other models: 100 mVp-p typ.
Measured with a 1µF M/C and a 10µF T/C
Temperature coefficient ±0.02 %/K
Output current limitation at 150 % of Iout max., foldback
Short circuit protection indefinite, automatic recovery
Over voltage protection 3.3 VDC models: 3.7 – 5.4 Vout
5 VDC models: 5.6 – 7.0 Vout
12 VDC models: 13.5 – 19.6 Vout
15 VDC models: 16.8 – 20.5 Vout
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)
Max. capacitive load 3.3 VDC models: 10’000 µF
5 VDC models: 5000 µF
12 VDC models: 850 µF
15 VDC models: 700 µF
±12 VDC models: 500 µF (each output)
±15 VDC models: 350 µF (each output)
http://www.tracopower.com Page 3 of 4
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 +7C (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) >550’000 h
Isolation voltage (60sec.) – Input/Output 1500 VDC
Isolation capacitance – Input/Output 1000 pF typ.
Isolation resistance – Input/Output (500 VDC) >1000 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-810E
Safety standards UL/cUL 60950-1, IEC/EN 60950-1
Safety approvals – UL/cUL www.ul.com -> certifications -> File e188913
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 max. 265°C / 10 sec.
Environmental compliance – Reach www.tracopower.com/products/thn20wi-reach.pdf
– RoHS RoHS directive 2011/65/EU
Application note: www.tracopower.com/products/thn20wi-application.pdf
Page 4 of 4
Specifications can be changed without notice! Make sure you are using the latest documentation, downloadable at www.tracopower.com
www.tracopower.com
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. October 11. 2013
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 (0.28 oz) without converter
Thermal impedance after assembling: 14.8 K/W
Heat-Sink (Option)
31.1 (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)