international safety standard approvals ul478 reg. file no. e131987 csa c22.2-234 no. 950 file no. lr41062c electrical bulletin no. 1402c notes 1 line regulation is over the full +10v to 60v input range. 2 load regulation is over the range of no load to maximum average output current. 3 the current limit of 3t20ap is factory set at 24a to 27a. however, when units are used in parallel configuration, the current limit should be set at 20a. consult factory for a full explanation of parallel operation of 3t regulators. 3t series single output [ 2 year warranty ] ? 75% efficiency ? ul and csa approvals ? adjustable output voltage ? logic inhibit ? short circuit protection ? parallelability ? remote sense these wide range input, three terminal, 25khz switching regulators are versatile, inexpensive, and efficient. they provide a single adjustable output from a dc source. 75% typical efficiency is an added advantage of the switcher which helps reduce transformer and heatsink requirements over an equivalent linear regulator. since their efficiency is essentially independent of input voltage, output current need not be derated with increasing input voltage. other features include: short circuit protection; remote on/off; parallelability and remote sensing. the 3t series modules are unique open board dc/dc converters that help solve tough power system requirements. specification all specifications are typical at nominal input, full load at 25 c unless otherwise stated page 158 data sheet ? artesyn technologies ? 2000 the information and specifications contained in this data sheet are believed to be correct at time of publication. however, artesyn technologies accepts no responsibility for consequences arising from printing errors or inaccuracies. specifications are subject to change without notice. no rights under any patent accompany the sale of any such product(s) or information contained herein. general specifications efficiency 75% typical switching frequency 25khz approvals and ul478 standards csa c22.2-234 no. 950 weight 3t12ap 0.30kg (10.59oz) 3t20ap 0.40kg (14.12oz) 3t5an 0.35kg (12.36oz) mtbf mil-hdbk-217c 95,000 hours environmental specifications thermal performance operating ambient: 3t12ap, 3t5an 0c to +50c 3t20ap 0c to +70c non-operating C20c to +85c maximum heatsink 3t12ap, 3t5an +60c temperature 3t20ap +80c relative humidity non-condensing 5% to 80% rh altitude operating 10,000 feet max. non operating 30,000 feet max. output specifications output voltage 3t12ap +4.5vdc to +30vdc (adjustable) 3t20ap +4.5vdc to +15vdc 3t5an C4.5vdc to C30vdc remote sense remove jp1 for remote sense operation line regulation 3t12ap see figure 2 +10v to +60v 3t20ap see figure 2 (see note 1) 3t5an 0.2% load regulation nl to fl (see note 2) 1.0% ripple and noise 3t12ap 150mv pk-pk, max. 3t20ap 150mv pk-pk, max. 3t5an 250mv pk-pk, max. transient response +5v (8a to 16a) 200mv pk transient, (3t20ap) 1ms recovery to 1% +15v (8a to 16a) 350mv pk transient, 0.8ms recovery to 1% temperature coefficient 3mv/c input/output voltage minimum differential 3t12ap 3v(v in 3 15v), 5v(v in <15v) 3t20ap 3.5v(v in 3 15v), 5v(v in <15v) 3t5an see figure 1 output current limit 3t12ap 17a 10% (factory set) 3t20ap (see note 3) 24a to 27a 3t5an 8a 15% soft start standard input specifications input voltage range see figure 1 10vdc to 60vdc remote on/off inhibit >3v operate <1v
pin connections (3t12ap and 3t20ap) pin function note e1 + input f e2 + output f e3 return f e4 C remote sense d e5 + remote sense e6 pos. sync out g e7 neg. sync out g e8 sync in e e9 inhibit (remote on/off) pin connections (3t5an) pin function note e1 + input c e2 C output c e3 return c e4 + remote sense a e5 C remote sense e6 inhibit (remote on/off) e7 sync in b mechanical notes for 3t12ap and 3t20ap d remove jp1 for remote sense. e remove jp2 to synchronise to another to 3t12ap or 3t20ap. f terminals are 8-32 studs, 8 to 12 in lbs torque required. g e6 output is used as clock to synch other 3t12aps or 3t20aps to a single 3t12ap or 3t20ap. e7 is used to synch 3t5ans to a single 3t12ap or 3t20ap. 0.25 (6.40) 2 pl 5.05 (128.27) 4.50 (114.30) a
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