Texas Instruments BQ76922EVM, User Manual, Page: 15 / 38

Install cell
simulator shunts
Position shunts
to “INT”
Bipolar DC Power Supply
(source/sink)
+ -
Bipolar DC Power Supply
(source/sink)
+ -
Figure 5-2. Evaluating with Charge or Discharge Current
5.4 Evaluating with Simulated Current
The quick start guide describes connection for basic operation. Providing more than recognizable current in that
configuration can require a power supply with a significant power rating. Applying a charge current can damage
some power supplies.
Figure 5-3 shows a method to force current through the sense path without a high wattage
power supply or special equipment. The load power supply should be set at a low voltage in a constant current
mode. Polarity can be reversed on the load supply to simulate a charge current. The battery simulation supply
must never be reversed.
DC Power Supply
+ -
Install cell
simulator shunts
Position shunts
to “INT”
DC Power Supply
+ -
(Simulated load)
Figure 5-3. Simulating Current Setup
5.5 Reducing the Cell Count
The BQ76922 must have the top and bottom cells used for proper operation. Cell count can be reduced by
shorting the unused cell inputs from the next-to-top down. Cell count can be reduced for basic evaluation by
www.ti.com BQ76922EVM Circuit Module Use
SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021
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BQ76922EVM Evaluation Module 15
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