Datasheet

LM2587
www.ti.com SNVS115D –APRIL 2000–REVISED APRIL 2013
Figure 29. Triple-Output Flyback Regulator
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 T1 T1 T1 T2 T3 T4
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) 1.8A 1.4A 1.2A 0.3A 1A 2.5A
N
1
1 1 1 2.5 0.8 0.35
V
OUT2
−12V −12V 12V
I
OUT2
(Max) 0.3A 1A 0.5A
N
2
2.5 0.8 0.8
V
OUT3
−12V
I
OUT3
(Max) 0.5A
N
3
0.8
Table 2. Transformer Manufacturer Guide
Transformer Manufacturers' Part Numbers
Type
Coilcraft
(1)
Coilcraft
(1)
Pulse
(2)
Renco
(3)
Schott
(4)
Surface Mount Surface Mount
T1 Q4434-B Q4435-B PE-68411 RL-5530 67141450
T2 Q4337-B Q4436-B PE-68412 RL-5531 67140860
T3 Q4343-B — PE-68421 RL-5534 67140920
(1) Coilcraft Inc.,: Phone: [phone] Silver Lake Road, Cary, IL 60013: Fax: [phone]
(2) Pulse Engineering Inc.,: Phone: [phone] World Trade Drive, San Diego, CA 92128: Fax: [phone]
(3) Renco Electronics Inc.,: Phone: [phone] Jeffryn Blvd. East, Deer Park, NY 11729: Fax: [phone]
(4) Schott Corp.,: Phone: [phone] Parkers Lane Road, Wayzata, MN 55391: Fax: [phone]
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