Table Of Contents - Analog Devices LINEAR LT8491 Manual

LT8491

TABLE OF CONTENTS

Features ..................................................... 1
Applications ................................................ 1
Typical Application ........................................ 1
Description.................................................. 1
Absolute Maximum Ratings .............................. 4
Order Information .......................................... 4
Pin Configuration .......................................... 4
Electrical Characteristics ................................. 5
Typical Performance Characteristics ................... 8
Pin Functions .............................................. 10
Block Diagram ............................................. 13
Operation................................................... 14
Overview ................................................................. 14
2
I C Serial Interface.................................................. 14
2
I C: START and STOP Conditions ...............................14
2
I C: ACKnowledge .......................................................14
2
I C: Chip Addressing ...................................................15
2
I C: Clock Stretching ...................................................15
2
I C: Data Transfer Transactions ..................................15
2
I C: Powering the Interface .........................................15
2
I C Data .................................................................. 16
Data: Memory Regions ...............................................16
Data: Bytes, Words and Long Words .........................17
Data: Min/Max Register Values ..................................17
Data: Access Permissions...........................................17
Startup Sequence ................................................... 18
Battery Charging Algorithm ....................................20
Stage 0: Trickle Charging ........................................... 20
Stage 1: Full Constant Current ................................... 20
Stage 2: Constant Voltage .......................................... 21
Stage 3: (Optional) Reduced Constant Voltage ......... 21
Done Charging ............................................................ 21
Charging Faults ........................................................... 21
Maximum Power Point Tracking .............................23
Telemetry Operation ...............................................23
Telemetry: Configuration Settings ..............................24
Telemetry: Acquisition .................................................24
CRC Operation ........................................................ 24
EEPROM Operation .................................................25
EEPROM: Startup ....................................................... 25
EEPROM: Reading ...................................................... 25
EEPROM: Writing ....................................................... 25
2
2
I C Register Map .......................................... 27
2
I C Register Descriptions ................................ 30
Telemetry Registers ................................................30
TELE_TBAT ................................................................. 30
TELE_POUT .................................................................31
TELE_PIN .....................................................................31
TELE_EFF .....................................................................31
TELE_IOUT ................................................................. 32
TELE_IIN ..................................................................... 32
TELE_VBAT ................................................................. 32
TELE_VIN .................................................................... 33
TELE_VINR ................................................................. 33
Status Registers .....................................................34
STAT_CHARGER ......................................................... 34
STAT_SYSTEM ........................................................... 35
STAT_SUPPLY ............................................................ 36
STAT_TSx_REMAIN ................................................... 36
STAT_CHRG_FAULTS ................................................ 37
STAT_VERSION .......................................................... 38
STAT_BOOT_CRC ....................................................... 38
STAT_CFG_CRC.......................................................... 38
Control The EEPROM ..............................................39
CTRL_WRT_TO_BOOT .............................................. 39
CTRL_EE_WRT_EN ................................................... 39
Control Other Functions ..........................................40
CTRL_HALT_STARTUP ............................................. 40
CTRL_CHRG_EN ........................................................ 40
CTRL_RESTART_CHIP ...............................................41
CTRL_RESET_FLAG ...................................................41
CTRL_UPDATE_TELEM ..............................................41
Configure The Telemetry ......................................... 42
CFG_RSENSE1 ........................................................... 42
CFG_RIMON_OUT ..................................................... 43
CFG_RSENSE2 ........................................................... 43
CFG_RDACO ............................................................... 43
CFG_RFBOUT1 ........................................................... 44
CFG_RFBOUT2 ........................................................... 44
CFG_RDACI ................................................................ 44
CFG_RFBIN2 ............................................................... 45
CFG_RFBIN1 ............................................................... 45
Configure Initial Charger Enable .............................45
CFG_INIT_CHRG_EN ................................................. 45
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