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Original question:

BQ78350-R1: C Driver for the 78350?

BQ78350-R1: Short Circuit in Discharge Protection

Jeffrey Wright
Expert 2875 points
Part Number: BQ78350-R1
Other Parts Discussed in Thread: BQ78350

Hello;

1. Just so I understand, the "hardware-based" protection mechanism is NOT within the 78350 itself, but is actually within the 769x0, correct?

3.6.2 Short Circuit in Discharge Protection
The device has a hardware-based short circuit in discharge protection with adjustable current and delay.  See Section 3.1.4 for additional FET action options.

This register is representative of the bq769x0 PROTECT 1 register

2. Also, as I'm writing a driver for the 78350, my compiler alerted me to something else confusing: I note that many of the SBS commands are identical to the ManufacturerAccess() commands? Please explain the difference between sending 0x0060 to command 0 (ManufacturerAccess), and simply sending the command 0x60, listed in table 17.1.

Thanks!

  • 0
    TI__Guru* 81034 points

    Hi Jeffrey,

    The hardware-based protection is in the BQ769x0 device. It cannot be disabled but it can be configured by programming the associated BQ78350 registers (threshold and delay). 

    The regular SBS commands are available to comply with the SBS standard. The ManufacturerAccess commands allow block reads which allow you to read and write larger sections of data flash and these commands can be used when the device is in SEALED mode. Both methods access the same data.

    Best regards,

    Matt

  • 0 in reply to Matt Sunna
    Expert 2875 points

    Thanks Matt...That explains why I had thought the acronym "SMB"us was misspelled in the reference as SBS ;-D)

    (I didn't know about the smart battery spec!)