5 Protector
From this page, the user can set the voltage and temperature protection thresholds for any device in the system.
Also present on this page are status and fault lights to monitor the condition of the connected devices.
Enable GPIOs for ADC
measurement and protection
Figure 5-1. BQ79616 GUI Protector Page
5.1 Threshold Settings
Under the Voltage Protection section, the user can configure the OV and UV thresholds. Voltages beyond
these thresholds trigger faults, and the faults are reflected in the status lights on the right side of the page. Use
the drop-down menu to edit the thresholds and press Write OVUV to write to the corresponding registers.
In the Temperature Protection section, the user can set the OT and UT thresholds. To use the temperature
protections, first enable TSREF via the Register Map page by setting bit 0 of register CONTROL2 to 1. Like the
OTCB threshold, the OTUT thresholds are represented as percentages of TSREF. Once set, press Write OTUT
to write the thresholds to the corresponding register and start the protectors in the selected run mode.
In addition, the GPIOs that are connected to external thermistors must be selected in the selection box. This
configures the GPIOs for both ADC readings and OTUT protection and tells the device not to ignore the fault
detection result.
5.2 Protector Run Modes
The user can also change protector modes from this page. The standard protection mode is Round Robin. In
round robin mode, all active cells and GPIOs are sequentially evaluated against the corresponding protection
thresholds, and faults are triggered if a threshold is crossed.
The BQ79616 also supports a protector mode called Single Channel Run. In this mode, the user can lock the
OVUV and OTUT protectors to a single cell and GPIO, respectively. The user can also configure the threshold
lock setting.
The last supported protector modes are the OVUV and OTUT built-in self test cycles.
Protector
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20 BQ79616-Q1 and BQ75614-Q1 GUI User's Guide SLUUC36 – DECEMBER 2020
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