Datasheet LT8491 (Analog Devices) - 9

LT8491
TYPICAL PERFORMANCE CHARACTERISTICS Max Power Point Tracking Perturb and Observe Perturb and Observe
V V PANEL PANEL 5V/DIV 5V/DIV PERTURB AND OBSERVE VPANEL 5V/DIV IMON_OUT IMON_OUT 100mV/DIV IMON_OUT 200mV/DIV 500mV/DIV 8491 G09 30s/DIV 8491 G10 0.5s/DIV 8491 G11 0.5s/DIV FIGURE 37 APPLICATION FIGURE 37 APPLICATION FIGURE 37 APPLICATION
Perturb and Observe Max Power Full Panel Scan Single Full Panel Scan – Partially Point Tracking Power Peak Shaded with Dual Power Peaks
ROTATE PANEL TOWARDS THE SUN VPANEL 10V/DIV VPANEL 10V/DIV VPANEL PANEL VOLTAGE 10V/DIV AND CURRENT ARE POWER PEAK MAX POWER PEAK AUTOMATICALLY IMON_OUT IMON_OUT ADJUSTED TO NEW 500mV/DIV IMON_OUT 500mV/DIV MAX POWER POINT 500mV/DIV IMON_IN LOWER POWER PEAK 500mV/DIV IMON_IN 500mV/DIV 8491 G12 5s/DIV 8491 G13 0.5s/DIV 8491 G14 0.5s/DIV FIGURE 37 APPLICATION FIGURE 37 APPLICATION FIGURE 37 APPLICATION
Panel Voltage in Low Panel Voltage in Low Power Mode Power Mode
IMON_OUT 50mV/DIV IMON_OUT 50mV/DIV 29.4V 16.0V VPANEL VPANEL 5V/DIV 5V/DIV 17.75V 3.3V 3.3V SWEN SWEN 5V/DIV 5V/DIV 8491 G15 60ms/DIV 8491 G16 60ms/DIV FIGURE 37 APPLICATION FIGURE 37 APPLICATION Rev. 0 For more information www.analog.com 9 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