Datasheet LT8491 (Analog Devices) - 5

LT8491
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VDD = AVDD = 3.3V, SHDN = 3V unless otherwise noted. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Voltage Supply and Regulators
VIN Operating Voltage Range (Note 7) l 6 80 V VIN Quiescent Current Not Switching, VEXTVCC = 0, VDD = AVDD = Float 2.65 4.2 mA VIN Quiescent Current in Shutdown VSHDN = 0V 0 1 µA VDD Quiescent Current IAVDD + IVDD, VDD = AVDD = 3.3V l 2.5 4 6.5 mA EXTVCC Switchover Voltage IINTVCC = 20mA, VEXTVCC Rising l 6.15 6.4 6.6 V EXTVCC Switchover Hysteresis 0.18 V LDO33 Pin Voltage 5mA from LDO33 Pin l 3.23 3.295 3.35 V LDO33 Pin Load Regulation ILDO33 = 0.1mA to 5mA –0.25 –1 % LDO33 Pin Current Limit l 12 17.25 22 mA LDO33 Pin Undervoltage Lockout LDO33 Falling 2.96 3.04 3.12 V LDO33 Pin Undervoltage Lockout Hysteresis 35 mV
Switching Regulator Control
SHDN Input Voltage High SHDN Rising to Enable the Device l 1.184 1.234 1.284 V SHDN Input Voltage High Hysteresis 50 mV SHDN Input Voltage Low Device Disabled, Low Quiescent Current l 0.35 V SHDN Pin Bias Current VSHDN = 3V 0 1 µA VSHDN = 12V 11 22 µA SWEN Rising Threshold Voltage l 1.156 1.206 1.256 V SWEN Threshold Voltage Hysteresis 22 mV MODE Pin Thresholds Discontinuous Mode l 2.3 V Automatic DCM/CCM Mode l 0.4 V IMON_OUT Rising threshold for CCM Operation MODE = 0V 168 195 224 mV IMON_OUT Falling threshold for DCM MODE = 0V 95 122 150 mV
Voltage Regulation
Regulation Voltage for FBOUT VC = 1.2V, EXTVCC = 0 l 1.193 1.207 1.222 V Regulation Voltage for FBIN VC = 1.2V, EXTVCC = 0 l 1.184 1.205 1.226 V FBOUT Pin Bias Current Current Out of Pin 15 nA FBIN Pin Bias Current Current Out of Pin 10 nA
Current Regulation
Regulation Voltage for IMON_IN and IMON_OUT VC = 1.2V, EXTVCC = 0 l 1.187 1.208 1.229 V IMON_IN Output Current VCSPIN – VCSNIN = 50mV, VCSPIN = 5.025V 54 57 60 µA VCSPIN – VCSNIN = 50mV, VCSPIN = 5.025V l 53 57 61 µA VCSPIN – VCSNIN = 0mV, VCSPIN = 5V l 2.5 7 11.5 µA IMON_IN Overvoltage Threshold l 1.55 1.61 1.67 V IMON_OUT Output Current VCSPOUT – VCSNOUT = 50mV, VCSPOUT = 5.025V 47.5 50 52.5 µA VCSPOUT – VCSNOUT = 50mV, VCSPOUT = 5.025V l 47 50 54.25 µA VCSPOUT – VCSNOUT = 5mV, VCSPOUT = 5.0025V 3.25 5 6.75 µA VCSPOUT – VCSNOUT = 5mV, VCSPOUT = 5.0025V l 2.75 5 8 µA IMON_OUT Overvoltage Threshold l 1.55 1.61 1.67 V Rev. 0 For more information www.analog.com 5 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