Datasheet

LM2585
www.ti.com SNVS120F –APRIL 2000–REVISED APRIL 2013
TRANSFORMER SELECTION (T)
Table 1 lists the standard transformers available for flyback regulator applications. Included in the table are the
turns ratio(s) for each transformer, as well as the output voltages, input voltage ranges, and the maximum load
currents for each circuit.
Table 1. Transformer Selection Table
Applications Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29
Transformers T7 T7 T7 T6 T6 T5
V
IN
4V–6V 4V–6V 8V–16V 4V–6V 18V–36V 18V–36V
V
OUT1
3.3V 5V 12V 12V 12V 5V
I
OUT1
(Max) 1.4A 1A 0.8A 0.15A 0.6A 1.8A
N
1
1 1 1 1.2 1.2 0.5
V
OUT2
−12V −12V 12V
I
OUT2
(Max) 0.15A 0.6A 0.25A
N
2
1.2 1.2 1.15
V
OUT3
−12V
I
OUT3
(Max) 0.25A
N
3
1.15
Table 2. Transformer Manufacturer Guide
Manufacturers' Part Numbers
Transform
Coilcraft Pulse
Coilcraft Pulse Renco Schott
er Type
(1) (2)
(1) (2) (3) (4)
Surface Mount Surface Mount
T5 Q4338-B Q4437-B PE-68413 — RL-5532 67140890
T6 Q4339-B Q4438-B PE-68414 — RL-5533 67140900
T7 S6000-A S6057-A — PE-68482 RL-5751 26606
(1) Coilcraft Inc. Phone: [phone] www.coilcraft.com
(2) Pulse Engineering Inc. Phone: [phone] www.digikey.com
(3) Renco Electronics Inc. Phone: [phone] www.cdiweb.com/renco
(4) Schott Corp. Phone: [phone] www.schottcorp.com/
TRANSFORMER FOOTPRINTS
Figure 30 through Figure 44 show the footprints of each transformer, listed in Table 1.
T7 T6
Figure 30. Coilcraft S6000-A Figure 31. Coilcraft Q4339-B
(Top View) (Top View)
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