LM2586T-3.3 National Semiconductor, LM2586T-3.3 Datasheet - Page 12

• Manufacturer Part Number: LM2586T-3.3
• Description: Power Supply IC
• Manufacturer: National Semiconductor

Specifications of LM2586T-3.3

• Output Current: 3A
• Output Voltage: 3.3VDC
• No. Of Pins: 7
• Peak Reflow Compatible (260 C): No
• Termination Type: Through Hole
• Leaded Process Compatible: No
• Mounting Type: Through Hole
• Package / Case: 7-TO-220
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Flyback Regulator Operation
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As shown in Figure 4, the LM2586 can be used as a flyback regulator by using a minimum number of external components. The switching waveforms of this
regulator are shown in Figure 5. Typical Performance Characteristics observed during the operation of this circuit are shown in Figure 6.
FIGURE 4. 12V Flyback Regulator Design Example
Typical Performance Characteristics
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A: Switch Voltage, 20V/div
B: Switch Current, 2A/div
C: Output Rectifier Current, 2A/div
D: Output Ripple Voltage, 50 mV/div AC-Coupled
FIGURE 5. Switching Waveforms
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