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TPS92513: Typical application schematic

Shunsuke Nagata
Genius 13070 points
Part Number: TPS92513

Hi,

As I design sample schematic with WEBENCH for TPS92513, the diode is attached between Cout and Vin. (D2 diode is added in attached schematic.)

Datasheet  explains typical application but it should not have the diode. Could you please let me know the reason why the diode is required in WEBENCH IR-LED1.pdf

Regards,
Nagata.

  • 0
    TI__Intellectual 2590 points
    The diode from Vout to Vin is a protection diode. In the case that the LED load becomes an open circuit, that diode prevents the output voltage from exceeding one diode drop above VIN. It is not always required as the TPS92513 does not have any pin touch the LED output voltage directly, but is good practice when using a buck converter in general.

    -JP