±10

±8

±6

±4

±2

0

2

4

6

8

10

±20

0

20

40

60

80

Forced Temperature (

ƒC)

C008

At 2000mA

±10

±8

±6

±4

±2

0

2

4

6

8

10

±40

±20

0

20

40

60

80

100

Forced Temperature (

ƒC)

C006

At 4200mV

20

bq78350-R1

SLUSCD0B – AUGUST 2015 – REVISED NOVEMBER 2018

www.ti.com

Product Folder Links: bq78350-R1

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Copyright © 2015–2018, Texas Instruments Incorporated

The bq78350-R1 device takes a short period of time to boot up before the device can begin updating battery

parameter data that can be then reported via the SMBus or the optional display. Normal operation after boot-up

is indicated by the VEN pin pulsing to enable voltage data measurements for the ExtAveCell() function. Figure 10

shows the timing of these signals.

Figure 10. Valid VCC to Full FW Operation

Figure 11, Figure 12, Figure 13, and Figure 14 show Measurement System Performance Data of the bq78350-

R1 device + the bq76920 EVM. This data was taken using a standard bq76920 EVM with power supplies

providing the voltage and current reference inputs.

Figure 11. Cell Voltage Error Reported Through

CellVoltage1…5()

Figure 12. Battery Charge Current Error Reported Through

Current()