Texas Instruments bq78350-R1 Technical Reference

2
SLUUBD3D–September 2015–Revised September 2018
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Copyright © 2015–2018, Texas Instruments Incorporated
Contents
Contents
Preface ........................................................................................................................................ 9
1 Introduction....................................................................................................................... 10
2 Basic Measurement System................................................................................................. 11
2.1 Introduction.................................................................................................................. 11
2.2 Current and Coulomb Counting .......................................................................................... 11
2.3 Voltage....................................................................................................................... 11
2.4 Temperature ................................................................................................................ 12
2.4.1 FET Temperature Measurement ............................................................................... 12
2.4.2 Temperature Enable .............................................................................................. 12
2.4.3 Temperature Mode Configuration............................................................................... 12
2.5 Temperature Ranges ...................................................................................................... 13
2.6 Basic Configuration Options .............................................................................................. 13
2.6.1 DA Configuration .................................................................................................. 13
2.6.2 FET Options........................................................................................................ 14
2.6.3 AFE Cell Map ...................................................................................................... 15
3 Protections........................................................................................................................ 17
3.1 Introduction.................................................................................................................. 17
3.1.1 General Protections Configuration .............................................................................. 17
3.1.2 Enabled Protections .............................................................................................. 18
3.1.3 Enabled Removal Recovery ..................................................................................... 20
3.1.4 FET Action Options for Current Protections ................................................................... 21
3.2 Cell Undervoltage Protection ............................................................................................. 21
3.3 Cell Overvoltage Protection............................................................................................... 22
3.4 Overcurrent in Charge Protection ........................................................................................ 22
3.5 Overcurrent in Discharge Protection..................................................................................... 23
3.6 Hardware-Based Protection............................................................................................... 24
3.6.1 Overload in Discharge Protection ............................................................................... 24
3.6.2 Short Circuit in Discharge Protection ........................................................................... 26
3.6.3 AFE ALERT OVRD Protection .................................................................................. 27
3.7 Temperature Protections .................................................................................................. 28
3.7.1 Overtemperature in Charge Protection......................................................................... 28
3.7.2 Overtemperature in Discharge Protection...................................................................... 29
3.7.3 Undertemperature in Charge Protection ....................................................................... 29
3.7.4 Undertemperature in Discharge Protection .................................................................... 29
3.7.5 Overtemperature FET Protection................................................................................ 30
3.8 Precharge Timeout Protection............................................................................................ 30
3.9 Fast Charge Timeout Protection ......................................................................................... 31
3.10 Overcharge Protection..................................................................................................... 31
4 Permanent Fail................................................................................................................... 32
4.1 Introduction.................................................................................................................. 32
4.2 Permanent Failure Configuration......................................................................................... 32
4.3 Enabling Use of the SAFE Pin ........................................................................................... 34
4.4 Safety Cell Undervoltage Permanent Fail............................................................................... 36
4.5 Safety Cell Overvoltage Permanent Fail ................................................................................ 37

Texas Instruments bq78350-R1 Specifications

General

Brand	Texas Instruments
Model	bq78350-R1
Category	Controller
Language	English