Texas Instruments BQ28Z610-R2 User Manual

2.1 Introduction
This chapter describes the gauge's recoverable protection. When the protection is triggered, charging and/or
discharging is disabled. This is indicated by OperationStatus()[XDSG] = 1 when discharging is disabled (DSG
FET is turned OFF), and OperationStatus()[XCHG] = 1 when charging is disabled (the CHG and PCHG FETs are
turned OFF). Once the protection is recovered, charging and discharging resumes. All protection items can be
enabled or disabled under Settings:Enable Protections A and Settings:Enable Protections B.
To protect the DSG FET body diode, the DSG FET will always be closed when Current() > Charge Detect
Current, including when OperationStatus()[XDSG] = 1. Likewise, to protect the CHG FET body diode, the CHG
FET will always be closed when Current() ≤ Discharge Detect Current, including when OperationStatus()[XCHG]
= 1.
2.2 Cell Undervoltage Protection
The device can detect undervoltage in batteries and protect cells from damage by preventing further discharge.
Status Condition Action
Normal Min cell voltages 1..2 > CUV:Threshold
SafetyAlert()[CUV] = 0
BatteryStatus()[TDA] = 0
Alert Min cell voltages 1..2 ≤ CUV:Threshold
SafetyAlert()[CUV] = 1
BatteryStatus()[TDA] = 1
Trip
Min cell voltages 1..2 ≤ CUV:Threshold for CUV:Delay
duration
SafetyAlert()[CUV] = 0
SafetyStatus()[CUV] = 1
BatteryStatus()[FD] = 1, [TDA] =0
OperationStatus()[XDSG] = 1
Recovery
Condition 1:SafetyStatus()[CUV] = 1 AND
Min cell voltages 1..2 ≥ CUV:Recovery AND
Protection Configuration[CUV_RECOV_CHG] = 0
Condition 2: SafetyStatus()[CUV] = 1 AND
Min cell voltages 1..2 ≥ CUV:Recovery AND
Protection Configuration[CUV_RECOV_CHG] = 1 AND
[CUV_RECOV_CHG] = 1 AND
Charging detected (that is, BatteryStatus[DSG] = 0)
SafetyStatus()[CUV] = 0
BatteryStatus()[FD] = 0, [TDA] = 0
OperationStatus()[XDSG] = 1
2.3 Cell Overvoltage Protection
The device can detect cell overvoltage in batteries and protect cells from damage by preventing further charging.
Note
The protection detection threshold may be influenced by the temperature settings of the advanced
charging algorithm and the measured temperature.
Chapter 2
Protections
www.ti.com Protections
SLUUCO0 – APRIL 2022
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Texas Instruments BQ28Z610-R2 Specifications

General

Brand	Texas Instruments
Model	BQ28Z610-R2
Category	Computer Hardware
Language	English