Datasheet
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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
TMR 3WI Series 3 Watt
Input Specifications
Input current at full load 24 Vin models: 170 mA max.
48 Vin models: 85 mA max.
Input current at no load 24 Vin models: 25 mA typ.
48 Vin models: 15 mA typ.
Surge voltage (100 msec. max.) 24 Vin models: 50 V max.
48 Vin models: 100 V max.
Input filter EN 55022 level A, FCC part 15, level A
with external capacitor
Output Specifications
Voltage set accuracy ±1 % max
Regulation – Input variation Vin min. to Vin max. 0.2 % max.
– Load variation 0 – 100% single output models: 1.0 % max.
dual output models: 1.0 % max. balanced load
– Load cross regulation 25/100% 5.0 % max. (dual output models)
Minimum load not required
Temperature coefficient 0.1 %/K
Ripple and noise (20 MHz Bandwidth) 30 mVpk-pk max.
Start up time – Power On 30 ms typ.
(constant resistive load) – Remote On 30 ms typ.
Transient response setting time (25% load step change) 500 µs typ.
Temperature coefficient ± 0.1 %/°C
Short circuit protection continuous, automatic recovery
Capacitive load 3.3 VDC output models: 1‘760 µF max.
5 VDC output models: 1’000 µF max.
12 VDC output models: 170 µF max.
15 VDC output models: 110 µF max.
±5 VDC output models: ± 470 µF max.
±12 VDC output models: ± 100 µF max.
±15 VDC output models: ± 47 µF max.
General Specifications
Temperature ranges – Operating –40 °C to +85 °C
– Case temperature +100 °C max.
– Storage –55 °C to +125 °C
Load derating 3.5 %/K above 70°C
Humidity (non condensing) 95 % rel. H max.
Reliability, calculated MTBF (MIL-HDBK-217F ground benign) >1.7 Mio h @ 25°C
Isolation voltage (60 sec) – Input/Output 1’500 VDC
Isolation capacity – Input/Output 200 pF max.
Isolation resistance – Input/Output (500 VDC) >1 GOhm
Switching frequency 100 kHz (PWM)
Remote On/Off – On: open or high impedance
– Off: 2...4 mA to applied via 1 KOhm resistor
– Off stand by input current 2.5 mA max.
Vibration and thermal shock MIL-STD-810E
Safety standards UL /cUL 60950-1, EN 60950-1, IEC 60950-1
Safety approvals – UL/cUL pending