Analog Devices LINEAR LT8491 Manuals

Manuals and User Guides for Analog Devices LINEAR LT8491. We have 1 Analog Devices LINEAR LT8491 manual available for free PDF download: Manual

Analog Devices LINEAR LT8491 Manual (82 pages)

High Voltage Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT) and I2C

Brand: Analog Devices | Category: Controller | Size: 2 MB

Features
1
Applications
1
Typical Application
1
Description
1
Table of Contents
2
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
I 2 C Serial Interface
14
I 2 C: START and STOP Conditions
14
I 2 C: Acknowledge
14
I 2 C: Chip Addressing
15
I 2 C: Clock Stretching
15
C: Data Transfer Transactions
15
I 2 C: Powering the Interface
15
I 2 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
I 2 C Register Map
27
I 2 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
Configure V BAT
46
Cfg_Vs3_25C
46
Cfg_Uv_S0
47
Cfg_S0_Uv
47
Cfg_S0_S1
48
Cfg_S1_S0
49
Configure Temperature Fault Limits
50
Cfg_Tbat_Min
50
Cfg_Tbat_Max
50
Configure Stage Timeout Limits
51
Cfg_Tmr_S0
51
Cfg_Tmr_S1
51
Cfg_Tmr_S2
51
Cfg_Tmr_S3
51
Configure Automatic Restart
52
Cfg_Rstrt_In_Flt
52
Cfg_Rstrt_In_Donea
54
Cfg_Rstrt_In_Doneb
55
Cfg_Rstrt_In_S3
55
Configure Charge Termination
55
Cfg_Terminate
55
Configure Misc
56
Cfg_Scan_Rate_Lp
56
Cfg_Scan_Rate
56
Cfg_Chrg_Misc
57
Configure Temperature Compensation
58
Cfg_Tc3, Cfg_Tc2, Cfg_Tc1
59
Configure User Code
59
Cfg_User_Code
59
Manufacturer Data
60
Mfr_Data1
60
Mfr_Data2
60
Mfr_Data3
60
Applications Information
61
Hardware Configuration
61
HW Config: Input Voltage Sensing and Modulation
61
HW Config: VINR Pin Connections
61
HW Config: Solar Panel Powered Charging
62
HW Config: DC Supply Powered Charging
63
HW Config: V BAT S2
63
HW Config: Input Current Sense and Limit
64
HW Config: Output Current Sense and Limit
65
HW Config: Current Sense Filtering
66
HW Config: Battery Temperature and Disconnect Sensing
67
HW Config: SHDN Pin Connections
67
HW Config: MODE Pin - Current Conduction Mode
67
HW Config: Driving an LED with the STATUS Pin
68
HW Config: I 2 C Chip Address Pin
69
In-Situ Battery Charging
69
Hot-Plugging Considerations
70
STATUS Indicator Pin
70
Lithium-Ion Battery Charging
70
Lead-Acid Battery Charging
71
Optional Features
72
Optional: Low Power Mode
72
Optional: Output Feedback Resistor Disconnect
72
Optional: EXTV CC Disconnect
73
Optional: Remote Battery Voltage Sensing
74
Optional: DC Supply Detection Circuit
76
Board Layout Considerations
76
Design Example
76
Typical Applications
79
Package Description
81
Typical Application
82
Related Parts
82

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