Datasheet

Pro (Advanced) Screen

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8.3 CC Offset Calibration

Select the Current tab. CC Offset Calibration performs the internal calibration of the coulomb counter

input offset.

8.4 Board Offset Calibration

This performs the offset calibration for the current offset of the board. It is expected that no current is

flowing through the sense resistor while performing this calibration step. Remove load/external voltage

and short Pack– to Batt–.

Click the Calibrate Board Offset button.

8.5 Pack Current Calibration

Connect a load to Pack+/Load+ and Pack–/Load– that draws approximately 2 A. Measure the current and

type the value into Enter Actual Current using (–) for current in discharge direction.

Click the Calibrate Pack Current button.

Figure 10. Current Calibration Screen

9 Pro (Advanced) Screen

9.1 SMB Communication

The set of read/write operations over the SMBus are not specific to any gas gauge. These are provided as

general-purpose communication tools (Figure 12).

bq28550 Single Cell Li-Ion Battery Gas Gauge and Protection EVM SLUU520– July 2011

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