LM2587SX-3.3 National Semiconductor, LM2587SX-3.3 Datasheet - Page 14

• Manufacturer Part Number: LM2587SX-3.3
• Description: SIMPLE SWITCHER 5A Flyback Regulator
• Manufacturer: National Semiconductor

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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
1
OUT2
2
OUT3
3
(Max)
(Max)
(Max)
Figure 7
4V–6V
3.3V
1.8A
T1
1
FIGURE 12. Triple-Output Flyback Regulator
FIGURE 13. Transformer Selection Table
Figure 8
4V–6V
1.4A
T1
5V
1
Figure 9
8V–16V
1.2A
12V
14
T1
1
(Continued)
Figure 10
4V–6V
−12V
0.3A
0.3A
12V
2.5
2.5
T2
Figure 11
18V–36V
−12V
12V
0.8
0.8
T3
1A
1A
DS012316-18
Figure 12
18V–36V
−12V
2.5A
0.35
0.5A
0.5A
12V
0.8
0.8
T4
5V