LM2586S-12 National Semiconductor, LM2586S-12 Datasheet - Page 15

• Manufacturer Part Number: LM2586S-12
• Description: SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
• Manufacturer: National Semiconductor

Typical Flyback Regulator Applications
Transformer Selection (T)
Figure 13 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.
Applications
Transformers
V
V
I
N
V
I
N
V
I
N
OUT1
OUT2
OUT3
IN
OUT1
OUT2
OUT3
1
2
3
(Max)
(Max)
(Max)
Figure 7
4V–6V
3.3V
1.4A
T7
1
FIGURE 12. Triple-Output Flyback Regulator
Figure 8
FIGURE 13. Transformer Selection Table
4V–6V
T7
5V
1A
1
Figure 9
8V–16V
0.8A
12V
T7
1
15
(Continued)
Figure 10
4V–6V
0.15A
0.15A
−12V
12V
1.2
1.2
T6
Figure 11
18V–36V
−12V
0.6A
0.6A
12V
1.2
1.2
T6
Figure 12
18V–36V
0.25A
0.25A
−12V
1.8A
1.15
1.15
12V
DS012516-32
0.5
T5
5V
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