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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 1 & TMR 1SM 1 Watt
Input Specifications
Input current at no load (nominal input voltage) 5.0 V models: 40 mA typ.
12 V models: 20 mA typ.
24 V models: 10 mA typ.
48 V models: 7 mA typ.
Surge voltage (1 sec. max.) 5.0 V models: 15 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!
Conducted noise (input) EN 55022 level A, FCC part 15, level A with
external capacitor. see EMC consideration
Recommended input fuse (slow blow) 5 V models: 500 mA
12 V models: 250 mA
24 V models: 120 mA
48 V models: 60 mA
Output Specifications
Voltage set accuracy ±1 % max.
Regulation – Input variation Vin min. to Vin max. 0.2 % max.
– No load to full load Single & Dual output models: ±1.0 % max.
– Load variation 10 – 90% Single output models: ±0.5 % max.
Dual output models: ±0.8 % max.
Minimum load no minimum load required
Temperature coefficient 0.02 %/K
Ripple and noise (20 MHz bandwidth) SMD models: 30 mVp-p max.
SIP models: 50 mVp-p max.
Transient response setting time (25% load step change) 250 µs typ. (PFM)
Transient response deviation ±5 % max.
Current limitation >120 % of Iout max.
Over load protection (Foldback) 130 %
Short circuit protection continuous, automatic recovery
Capacitive load 5 VDC models: 1‘680 µF max.
12 VDC models: 820 µF max.
15 VDC models: 680 µF max.
24 VDC models: 470 µF max.
±12 VDC models: 470 µF max. (each output)
±15 VDC models: 330 µF max. (each output)
General Specifications
Temperature ranges – Operating SIP models: –40°C to +85°C with no derating
SMD models: –40°C to +82°C with derating
– Case temperature +105°C (SIP) / +95°C (SMD) max.
– Storage –55°C to +125°C
Load derating SMD models: 7.2 %/K above +75°C
Humidity (non condensing) 95 % rel. H max.
Reliability, calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >2.8 Mio h