Texas Instruments bq78350-R1 Technical Reference

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SLUUBD3D–September 2015–Revised September 2018
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SBS Commands
Class Subclass Name Format Length in Bytes Min Max Default Unit
Fuel Gauging Design Design Capacity mAh Integer 2 0 32767 4400 mAh
Fuel Gauging Design
Design Capacity 10
mWh
Integer 2 0 32767 6336 10 mWh
17.27 0x19 DesignVoltage()
This read-word function returns the theoretical cell nominal voltage. The default value is stored in data
flash value Design Voltage.
SBS
Cmd
Name
Access
Protocol Type
Length in
Bytes
Min Max Unit
SE US FA
0x18 DesignVoltage() R R/W R/W Word
Unsigned
Integer
2 0 65535 mV
Class Subclass Name Format Length in Bytes Min Max Default Unit
Fuel Gauging Design Design Voltage Integer 2 0 5000 3600 mV
17.28 0x1A SpecificationInfo()
This read-word function returns, as an unsigned integer value, the version number of the Smart Battery
Specification that the battery pack supports, as well as voltage- and current-scaling information.
Power-scaling is the product of the voltage-scaling × the current-scaling. The data is packed, as follows:
IPScale × 0x1000 + VScale × 0x0100 + SpecID_H × 0x0010 + SpecID_L
NOTE: IPScale is only supported in the bq78350-R2 device. For applications using higher than
32767 mA, update to the bq78350-R2 firmware.
VScale (voltage scaling) should be selected based on the total battery pack maximum voltage. The default
for this is 1, which causes the battery level voltage data to be reported in 10-mV units rather than 1-mV
units. The IPScale (current scaling) should be selected based on the battery size and current magnitudes
expected. The default for this is 1, which causes all mA and mAh units to change to 10 mA and 10 mAh,
respectively. The default setting is stored in Data: Specification Information, and if the data flash value
is changed, a reset (POR or via ManufacturerAccess()[RESET]) of the device is required for full correct
operation.
The default value is stored in the following data flash.
Class Subclass Name Format Length in
Bytes
Min Max Default Unit
SBS Configuration Data
Specification
Information
Hex 2 0x0000 0xFFFF 0x0031 —
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
IPSCALE VSCALE VERSION REVISION
IPSCALE (Bit 15:12): Current Scale Factor
0x0 = Noted reported current and capacities are scaled by 10E0.
0x1 = Noted reported current and capacities are scaled by 10E1.
0x2 = Noted reported current and capacities are scaled by 10E2.
0x3 = Noted reported current and capacities are scaled by 10E2.
VSCALE (Bit 11:8): Voltage Scale Factor

Texas Instruments bq78350-R1 Specifications

General

Brand	Texas Instruments
Model	bq78350-R1
Category	Controller
Language	English