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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 3E Series 3 Watt
Input Specifications
Input current at no load (nominal input voltage) 5.0 V models: 70 mA typ.
12 V models: 20 mA typ.
24 V models: 10 mA typ.
48 V models: 8 mA typ.
Input current at full load (nominal input voltage) 5.0 V models: 760 mA typ.
12 V models: 300 mA typ.
24 V models: 150 mA typ.
48 V models: 75 mA typ.
Surge voltage (1000 msec. max.) 5.0 V models: 11 V max.
12 V models: 25 V max.
24 V models: 50 V max.
48 V models: 100 V max.
Start-up voltage / under voltage lockout 5.0 V models: 4.5 VDC / 4 VDC or lower
12 V models: 9 VDC / 8.5 VDC or lower
24 V models: 18 VDC / 17 VDC or lower
48 V models: 36 VDC / 34 VDC or lower
long term operation at undervoltage will
damage the converter!
Reverse polarity input current 1.0 A max.
Conducted noise (input) EN 55022 level A, FCC part 15, level A
with external capacitor (tba)
Recommended input fuse (slow blow) 5 V models: 2000 mA
12 V models: 1000 mA
24 V models: 500 mA
48 V models: 250 mA
Output Specifications
Voltage set accuracy ±1 % max.
Regulation – Input variation Vin min. to Vin max. 0.5 % max.
– Load variation 25 – 100% 1.0 % max.
Minimum load 25 % of rated max. load (operation at lower
load condition is safe but a higher output ripple
will be experienced)
Temperature coefficient 0.02 %/K
Ripple and noise (20 MHz bandwidth) 75 mVp-p max.
Transient response setting time (25% load step change) 300 µs typ. (PFM)
Current limitation >120 % of Iout max.
Short circuit protection continuous, automatic recovery
Capacitive load 3.3 VDC models: 1‘760 µF max.
5 VDC models: 1‘000 µF max.
12 VDC models: 170 µF max.
15 VDC models: 110 µF max.
±5 VDC models: 470 µF max. (each output)
±12 VDC models: 100 µF max. (each output)
±15 VDC models: 47 µF max. (each output)
General Specifications
Temperature ranges – Operating –40°C to +85°C (with derating)
– Case temperature +100°C max.
– Storage –55°C to +105°C
Load derating 3.3 %/K above +70°C
Humidity (non condensing) 95 % rel. H max.
Reliability, calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >1 Mio h