TMDC 20

Key Features:

The TMDC 20 Series is a range of encapsulated high performance DC/DC converter modules. Designed with the highest reliable components and With a very high efficiency of up to 91%. These 20 W converters are avialable as a chassis-mount with screw terminlas or PCB versions.

• Fully encapsulated low profile plastic casing
• regulated
• Output voltage adjustable
• I/O isolation 2500VDC functional
• Operating temperature range -40 to +80°C
• Remote On/Off
• Chassis mount
• Optional DIN-Rail mount adapter

Product Details

Input Specifications


Input current at no load (nominal input voltage)
– 24 Vin models: 70 mA typ
– 48 Vin models: 35 mA typ.

Surge voltage (100 msec. max.)
– 24 Vin models: 50 V max.
– 48 Vin models: 100 V max.

Start up time
– 30 ms max.

Conducted noise (input)
– EN 55022 class A, FCC part 15 class A without external components

Start-up voltage / under voltage shut down
– 24 Vin models: 9 VDC max./ 7.5 VDC typ.
– 48 Vin models: 18 VDC max./ 16 VDC typ.

ESD (electrostatic discharge)
– EN 61000-4-2, air ±8 kV, contact ±4 kV, perf. criteria A

Radiated immunity
– EN 61000-4-3, 10 V/m, perf. criteria A

Fast transient / surge (with external input capacitor)
– EN 61000-4-4, ±2 kV, perf. criteria A
– EN 61000-4-5, ±0.5 kV perf. criteria A
– external input capacitor:
• Nippon chemi-con KXG 330 µF, 200 V

Conducted immunity
– EN 61000-4-6, 10 Vrms, perf. criteria A

Output Specifications


Voltage set accuracy ±2.0 % max.

Regulation
– Input variation Vin min. to Vin max. 0.5 % max.
– Load variation 0 – 100 % 0.5 % max.

Minimum load not required

Temperature coefficient ±0.02 %/K

Ripple and noise (20 MHz Bandwidth)
– 5.1 VDC models: 100 mVpk-pk. typ.
– 12 & 24 VDC models: 150 mVpk-pk typ.
– 48 VDC models: 200 mVpk-pk. typ.

Transient response (alignment to 1% at load step change 75% to 100% ) 250 µs typ.

Over voltage protection 120 % of Vout

Output current limitation at 150% of Iout max.

Short circuit protection hiccup mode, automatic recovery

Capacitive load
– 5.1 VDC models: 6’800 µF max.
– 12.0 VDC models: 1’160 µF max.
– 24.0 VDC models: 300 µF max.
– 48.0 VDC models: 75 µF max

General Specifications


Temperature ranges
– Operating (natural convection 20 LFM) –40°C to +90°C (with derating)
– Case temperature +95°C max.
– Storage –50°C to +125°C

Humidity (non condensing) 95 % rel H max.

Reliability
– calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >667’600 h
– Isolation voltage (60 sec.) – Input/Output 2500 VDC

Isolation capacitance
– Input/Output 2200 pF max. (100 kHz, 1 V)

Isolation resistance
– Input/Output >1000 Mohm (500 VDC) Switching frequency 285 kHz typ.

Remote On/Off
– On: 3.5 to 12 VDC to -Vin or open circuit.
– Off: 0 to +1.2 VDC or short circuit to -Vin
– Off idle current: 3 mA typ.

Safety standards
– UL/cUL 60950-1 2nd edition,
– IEC 60950-1:2005 (2nd edition); Am 1:2009
– EN 60950-1:2006/A11:2009/A1:2010/
– A12:2011

Safety approvals
– UL certificate (UL/cUL 60950-1) www.tracopower.com/products/tmdc20-ul.pdf
– CB test certificate (IEC/EN 60950-1)

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