Datasheet LT8491 (Analog Devices) - 82

LT8491
TYPICAL APPLICATION 14.2V Flooded Lead-Acid Battery Charger
L1 ½W ½W 7mΩ 15µH M1 M4 5mΩ + VBAT CIN2 CIN3 COUT3 C 2.2µF OUT2 2.2µF SOLAR 10µF 10µF M2 PANEL ×2 ×2 M3 ×2 ×2 VOC < 53V GATEVCC´ 10Ω C GATEV IN1 CC´ C – OUT1 10Ω 10Ω 33µF D 150µF B1 ×3 3.3nF 10Ω 5mΩ DB2 COUT4 220nF 220nF 470nF 2Ω 1µF 3.3nF 2Ω CIN4 TG1 BOOST1 SW1 BG1 CSP CSN GND BG2 SW2 BOOST2 TG2 470nF 2.2µF CSNIN EXTVCC CSPIN V 4Ω IN CSPOUT GATEVCC´ GATEVCC CSNOUT 274k 196k LOAD 110k INTVCC FBOR 4.7µF FBOUT ×2 8.06k 35.7k MODE FBOW 26.1k 0.082µF 124k SHDN 23.2k VINR 93.1k TEMPSENSE FBIR AVDD FBIN FBIW LT8491 1µF 3.24k 5.49k 1µF 1.05k VDD + 14.2V 249k LDO33 FLOODED RT LEAD SRVO_IIN 18.2k – ACID SS SRVO_FBIN IIR SRVO_FBOUT IMON_IN 32.4k SRVO_IOUT IOW 4.7µF 3.01k 21k ECON 10k IOR AT 25°C IMON_OUT SWEN 100nF ß = 3380 SWENO NTC VC SYNC CLKDET CLKOUT 97.6k STATUS CA SDA SCL 8.2nF AV AV 100nF 8.45k 53.6k DD DD 4.7nF 1.3k 10k 200k 10nF 68nF DS 100k 10k 220pF 549Ω 8491 TA03 TO MASTER I2C ADDRESS: 0x10 M1, M2: INFINEON BSC028N06NS
REGISTER NAME I2C REG ADDR VALUE
14.27V STAGE 2 (ABSORPTION) CHARGE VOLTAGE (VS2) AT 25°C M3, M4: INFINEON BSC042N03LSG CFG_RSENSE1 0x28 0x02BC → (7mΩ) 13.87V STAGE 3 (FLOAT) CHARGE VOLTAGE (VS3) AT 25°C L1: 15µH COILCRAFT SER2915H-153KL, 10A CHARGING CURRENT LIMIT 15µH WURTH 744 364 1500 CFG_RIMON_OUT 0x2A 0x2620 → (97.6kΩ) 2.5A TRICKLE CURRENT LIMIT D CFG_RSENSE2 0x2C 0x01FA B1, DB2: CENTRAL SEMI CMMR1U-02 → (5mΩ) 7.2A INPUT CURRENT LIMIT CIN1: 33µF, 63V, SUNCON 63HVH33M CFG_RDACO 0x2E 0x3AA2 → (150.1kΩ) 53V MAXIMUM PANEL VOLTAGE (VMAX) CIN2, CIN3, CIN4: 2.2µF, 100V, AVX 12101C225KAT2A CFG_RFBOUT1 0x30 0x0AB4 → (274kΩ) NO TIMER LIMITS COUT1: 150µF, 25V SUNCON 25HVH 150M TEMPERATURE COMPENSATION ENABLED C CFG_RFBOUT2 0x32 0x0910 → (23.2kΩ) OUT2, COUT3: 10µF, 35V, MURATA GRM32ER7YA106KA2L –20°C TO 50°C BATTERY TEMPERATURE RANGE C CFG_RDACI 0x34 0x028E OUT4: 1µF, 25V AVX 12063C105KAT2A → (6.54kΩ) 175kHz SWITCHING FREQUENCY CFG_RFBIN2 0x36 0x0144 → (3.24kΩ) EXAMPLE SOLAR PANEL: SHARP NT-175UC1 175W CFG_RFBIN1 0x38 0x03AE → (93.1kΩ) CFG_VS3_25C 0x3B 0x7A → (97.2%) CFG_TBAT_MIN 0x40 0xEC → (–20°C) CFG_TBAT_MAX 0x41 0x32 → (50°C) CFG_TMR_S0 0x42 0x00 CFG_TMR_S1 0x43 0x00 CFG_TMR_S2 0x44 0x00 CFG_TMR_S3 0x45 0x00 CFG_RSTRT_IN_S3 [0] 0x49 1b CFG_CHRG_MISC [2:0] 0x4D 111b
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT8490 High Voltage, High Current Buck-Boost Battery Charger with MPPT VIN Range = 6V to 80V, VBAT Range = 1.3V to 80V LT3652/LT3652HV Power Tracking 2A Battery Charger for Solar Power VIN Range = 4.95V to 32V (LT3652), 4.95V to 34V (HV), MPPC LTC4000-1 High Voltage, High Current Controller for Battery Charger with MPPC VIN and VOUT Range = 3V to 60V, MPPC LTC4200 55V VIN/VOUT Buck-Boost Multi-Chemistry Battery Charging Controller Li-Ion and Lead-Acid Algorithms, MPPC Rev. 0 82 01/20 www.analog.com ANALOG DEVICES, INC. 2020 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