For the Dell Inspiron 15 3000 series, the BIOS chip is typically an 8-pin or 16-pin Winbond (W25Q64JV, W25Q128FV) or Macronix (MX25L6473E) component soldered onto the motherboard. The “bin file” is exactly what gets stored on that chip.
For most situations—like fixing stability issues, hardware compatibility, or security vulnerabilities—you should update the BIOS using the official executable file from Dell. Dell Inspiron 15 3000 Bios Bin File