Datasheet LT8491 (Analog Devices) - 3

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Applications Information ..61
CFG_VS3_25C .. 46 Hardware Configuration ..61 CFG_UV_S0 ...47 HW Config: Input Voltage Sensing and Modulation .. 61 CFG_S0_UV ..47 HW Config: VINR Pin Connections .. 61 CFG_S0_S1 .. 48 HW Config: Solar Panel Powered Charging .. 62 CFG_S1_S0 .. 49 HW Config: DC Supply Powered Charging .. 63 Configure Temperature Fault Limits ..50 HW Config: VBAT in Stage 2 (VS2) ... 63 CFG_TBAT_MIN .. 50 HW Config: Input Current Sense and Limit ... 64 CFG_TBAT_MAX .. 50 HW Config: Output Current Sense and Limit .. 65 Configure Stage Timeout Limits ... 51 HW Config: Current Sense Filtering ... 66 CFG_TMR_S0 ..51 HW Config: Battery Temperature and Disconnect CFG_TMR_S1 ..51 Sensing ... 67 CFG_TMR_S2 ..51 HW Config: SHDN Pin Connections .. 67 CFG_TMR_S3 ..51 HW Config: MODE Pin – Current Conduction Mode . 67 Configure Automatic Restart ..52 HW Config: Driving an LED with the STATUS Pin ... 68 CFG_RSTRT_IN_FLT .. 52 HW Config: I2C Chip Address Pin .. 69 CFG_RSTRT_IN_DONEA ... 54 In-Situ Battery Charging ...69 CFG_RSTRT_IN_DONEB ... 55 Hot-Plugging Considerations ..70 CFG_RSTRT_IN_S3 ... 55 STATUS Indicator Pin..70 Configure Charge Termination ..55 Lithium-Ion Battery Charging ...70 CFG_TERMINATE ... 55 Lead-Acid Battery Charging ..71 Configure Misc. ..56 Optional Features ..72 CFG_SCAN_RATE_LP ... 56 Optional: Low Power Mode .. 72 CFG_SCAN_RATE .. 56 Optional: Output Feedback Resistor Disconnect ... 72 CFG_CHRG_MISC .. 57 Optional: EXTVCC Disconnect .. 73 Configure Temperature Compensation ..58 Optional: Remote Battery Voltage Sensing ..74 CFG_TC3, CFG_TC2, CFG_TC1 .. 59 Optional: DC Supply Detection Circuit ... 76 Configure User Code ...59 Board Layout Considerations ..76 CFG_USER_CODE .. 59 Design Example ..76 Manufacturer Data ..60
Typical Applications ..79
MFR_DATA1 ... 60
Package Description ...81
MFR_DATA2 ... 60
Typical Application ...82
MFR_DATA3 ... 60
Related Parts ..82
Rev. 0 For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Overview I2C Serial Interface I2C: START and STOP Conditions I2C: ACKnowledge I2C: Chip Addressing I2C: Clock Stretching I2C: Data Transfer Transactions I2C: Powering the Interface I2C Data Data: Memory Regions Data: Bytes, Words and Long Words Data: Min/Max Register Values Data: Access Permissions Startup Sequence Battery Charging Algorithm Stage 0: Trickle Charging Stage 1: Full Constant Current Stage 2: Constant Voltage Stage 3: (Optional) Reduced Constant Voltage Done Charging Charging Faults Maximum Power Point Tracking Telemetry Operation Telemetry: Configuration Settings Telemetry: Acquisition CRC Operation EEPROM Operation EEPROM: Startup EEPROM: Reading EEPROM: Writing I2C Register Map I2C Register Descriptions Telemetry Registers TELE_TBAT TELE_POUT TELE_PIN TELE_EFF TELE_IOUT TELE_IIN TELE_VBAT TELE_VIN TELE_VINR Status Registers STAT_CHARGER STAT_SYSTEM STAT_SUPPLY STAT_TSx_REMAIN STAT_CHRG_FAULTS STAT_VERSION STAT_BOOT_CRC STAT_CFG_CRC Control The EEPROM CTRL_WRT_TO_BOOT CTRL_EE_WRT_EN Control Other Functions CTRL_HALT_STARTUP CTRL_CHRG_EN CTRL_RESTART_CHIP CTRL_RESET_FLAG CTRL_UPDATE_TELEM Configure The Telemetry CFG_RSENSE1 CFG_RIMON_OUT CFG_RSENSE2 CFG_RDACO CFG_RFBOUT1 CFG_RFBOUT2 CFG_RDACI CFG_RFBIN2 CFG_RFBIN1 Configure Initial Charger Enable CFG_INIT_CHRG_EN Configure VBAT for Stages 0, 1 and 3 CFG_VS3_25C CFG_UV_S0 CFG_S0_UV CFG_S0_S1 CFG_S1_S0 Configure Temperature Fault Limits CFG_TBAT_MIN CFG_TBAT_MAX Configure Stage Timeout Limits CFG_TMR_S0 CFG_TMR_S1 CFG_TMR_S2 CFG_TMR_S3 Configure Automatic Restart CFG_RSTRT_IN_FLT CFG_RSTRT_IN_DONEA CFG_RSTRT_IN_DONEB CFG_RSTRT_IN_S3 Configure Charge Termination CFG_TERMINATE Configure Misc. CFG_SCAN_RATE_LP CFG_SCAN_RATE CFG_CHRG_MISC Configure Temperature Compensation CFG_TC3, CFG_TC2, CFG_TC1 Configure User Code CFG_USER_CODE Manufacturer Data MFR_DATA1 MFR_DATA2 MFR_DATA3 Applications Information Hardware Configuration HW Config: Input Voltage Sensing and Modulation HW Config: VINR Pin Connections HW Config: Solar Panel Powered Charging HW Config: DC Supply Powered Charging HW Config: VBAT in Stage 2 (VS2) HW Config: Input Current Sense and Limit HW Config: Output Current Sense and Limit HW Config: Current Sense Filtering HW Config: Battery Temperature and Disconnect Sensing HW Config: SHDN Pin Connections HW Config: MODE Pin – Current Conduction Mode HW Config: Driving an LED with the STATUS Pin HW Config: I2C Chip Address Pin In-Situ Battery Charging Hot-Plugging Considerations STATUS Indicator Pin Lithium-Ion Battery Charging Lead-Acid Battery Charging Optional Features Optional: Low Power Mode Optional: Output Feedback Resistor Disconnect Optional: EXTVCC Disconnect Optional: Remote Battery Voltage Sensing Optional: DC Supply Detection Circuit Board Layout Considerations Design Example Typical Applications Package Description Typical Application Related Parts