Changed and Removed Features
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SLUUBM6–March 2018
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Overview
3.2.9.4 Charging Voltage High
Class Subclass Name Type Min Max Default Unit
Advanced Charging
Algorithms
Voltage Range
Charging Voltage
High
I2 0 32767 4000 mV
Description: Charging Voltage Med range to Charging Voltage High range
3.2.9.5 Charging Voltage Hysteresis
Class Subclass Name Type Min Max Default Unit
Advanced Charging
Algorithms
Voltage Range
Charging Voltage
Hysteresis
U1 0 255 0 mV
Description: Charging Voltage Hysteresis applied when voltage is decreasing.
4 Changed and Removed Features
4.1 IPScale Feature
The IPScale feature in the existing bq78350-R1 device was optimized further in this release.
4.2 Static DF Checksum
The Static DF Checksum feature in the existing bq78350-R1 device incorrectly includes some special DF
values which can vary from device to device. This causes the checksum to return different values on
different devices even when the same srec is loaded. This feature is fixed in this release, such that
different devices will all return the same checksum when the same srec is loaded.
4.3 LPEN Functionality Modified
The existing bq78350-R1 device includes the [LPEN] feature, which causes the CHG FET to be disabled
whenever a fault is determined that would cause the DSG FET to be disabled. After a time given by
Recovery is completed OR if the load is removed (as determined by the LOAD_PRESENT signal from the
bq769x0), the CHG and DSG FETs are turned back on.
This functionality is modified in this release to provide an additional recovery mechanism. A new data flash
control bit [DIS_AFE_TIME_RECOV] is introduced.
If [LPEN] is set and [DIS_AFE_TIME_RECOV] is cleared, then the CHG and DSG FETs will be turned
back on after the time given by Recovery OR when LOAD_PRESENT is cleared. This case is the same
as the existing bq78350-R1 device.
If [LPEN] is set and [DIS_AFE_TIME_RECOV] is also set, then the CHG and DSG FETs will be turned
back on only when the LOAD_PRESENT signal is detected.
If [LPEN] is cleared, then the DSG FET will be turned back on after the time given by Recovery. The
CHG FET will not have been disabled simply because the DSG FET was disabled, so will typically still be
on. This case is the same as the existing bq78350-R1 device operation.
NOTE: An important restriction: When [LPEN] is cleared, then the [DIS_AFE_TIME_RECOV]
should be cleared.
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