Datasheet

www.ti.com

Schematic of Isolated Two-Switch Flyback DC-DC Regulator

Figure 5 shows the input ripple current and output ripple voltage full load (2.5A) and mid input voltage

(48V).

Horizontal Resolution: 2 µs/div

Trace 1: The output voltage ripples (ac coupled). 50 mV/div

Trace 2: The input current ripples (ac coupled). 100 mA/div

Operating condition: Vin = 48V, Vout = 5V, Iout = 2.5A

Figure 5. Input Ripple Current and Output Ripple Voltage

6 Schematic of Isolated Two-Switch Flyback DC-DC Regulator

Figure 6 shows the schematic to reconfigure the evaluation board as an Isolated Two-Switch Flyback DC-

DC regulator. Refer to the changes in BOM at the end of this article. Note that the use of dual-diode D3

herein is owing to the D3 footprint on the PC board. Only the high side of the dual-diode D3 is used in

Flyback configuration, and the low side diode is always reverse biased during normal operation.

Figure 6. Schematic of Isolated Two-Switch Flyback DC-DC Regulator Configuration

SNVA291A–October 2007–Revised April 2013 AN-1724 LM5015 Isolated Two-Switch DC-DC Regulator Evaluation Board

Submit Documentation Feedback