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Figure 10-1. Using Cell Input Pins for Interconnect Measurement
If this connection across an interconnect is not needed (or it is preferred to avoid the extra resistor and
capacitor), then the unused cell input pins should be shorted to adjacent cell input pins, as shown in
for VC13.
A configuration register is used to specify which cell inputs are used for actual cells. The device uses this
information to disable cell voltage protections associated with inputs which are used to measure interconnect or
are not used at all. Voltage measurements for all inputs are reported in 16-bit format (in units of mV) as well as
32-bit format (in units of raw ADC counts), irrespective of whether they are used for cells or not.
10.2 General Purpose ADCIN Functionality
Several multifunction pins on the BQ76952 device can be used for general purpose ADC input (ADCIN)
measurement, if not being used for other purposes. This includes the TS1, TS2, TS3, CFETOFF, DFETOFF,
HDQ, DCHG, DDSG, and ALERT pins. When used for ADCIN functionality, the internal bandgap reference is
Copyright © 2021 Texas Instruments Incorporated
+
+
+
CELL-A
+
CELL-B
+
+
+
+
+
CELL-A
+
CELL-B
+
+
Figure 10-2. Terminating an Unused Cell Input Pin
Product Folder Links:
SLUSE13A – JANUARY 2020 – REVISED MAY 2021
VC15
VC14
VC13
VC12
VC11
VC10
VC9
VC8
VC7
VC6
VC5
VC4
VC15
VC14
VC13
VC12
VC11
VC10
VC9
VC8
VC7
VC6
VC5
VC4
BQ76952
BQ76952
Figure 10-2
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