Polymeric PTC Resettable Fuse 60V 500 mA Ih Surface Mount 2-SMD 500mA resettable fuse pptc The SMD050F-2 is a surface-mount resettable fuse (PPTC – Polymer Positive Temperature Coefficient) designed to provide overcurrent protection in low-voltage electronic circuits. It operates by increasing its resistance significantly when excessive current flows, thereby limiting current and protecting downstream components. Once the fault condition is removed and the device cools, it automatically resets to its low-resistance state, enabling normal operation without replacement. This component is commonly used in power supply lines, USB ports, battery-powered devices, and general electronic protection applications where space-saving and reliability are important. Key Features Resettable overcurrent protection (self-recovering) Surface-mount package for compact PCB layouts Low resistance in normal operation Fast response to fault conditions Automatic reset after fault removal RoHS compliant and lead-free Electrical Characteristics Hold current: 0.5 A Trip current: 1.0 A (typical) Maximum voltage: 60 V Maximum current: 40 A (fault current rating) Initial resistance: low resistance range suitable for minimal voltage drop Resistance after trip: significantly increased to limit current Thermal Characteristics Operating temperature range: -40°C to +85°C Trip time dependent on applied current and ambient temperature Reset time dependent on cooling conditions Mechanical Characteristics Package type: Surface-mount (SMD) Compact footprint suitable for dense PCB layouts Compatible with standard reflow soldering processes Applications USB and peripheral port protection Power supply and DC line protection Battery pack protection Consumer electronics Industrial control circuits Compliance and Standards RoHS compliant Halogen-free (depending on manufacturer variant) Meets industry standards for resettable fuses #commonpartslibrary #circuitprotection #ptc #fuse

I2C-Controlled 5A Buck or Boost Charger with NVDC Power Management and USB OTG for 2-Cell to 4-Cell Battery Pack Applications #ultralibrarian

36V Standalone Switching Charger with Integrated MOSFETs for 3-Cell to 6-Cell Series Battery Pack #ultralibrarian

Battery Fuel Gauge IC Lithium Ion/Polymer 24-TQFN (4x4) The MAX17320G20+ is a high-accuracy, ultra-low-power fuel gauge and battery protector IC designed for 2-cell to 4-cell lithium-ion and lithium-polymer battery packs. The device integrates Maxim Integrated’s ModelGauge™ m5 EZ algorithm to provide precise battery state-of-charge estimation without requiring battery relearning after system resets or battery replacement. It is optimized for portable, wearable, industrial, and IoT battery-powered applications where accurate battery monitoring and robust protection are required. The device combines fuel gauging, battery authentication support, autonomous battery protection, current sensing, and voltage monitoring into a single integrated solution. It includes configurable protection features such as overvoltage, undervoltage, overcurrent, short-circuit, and thermal protection, helping improve system safety and battery reliability. The MAX17320G20+ communicates through an I²C-compatible interface and supports low-power operation for extended battery runtime. Features High-accuracy battery fuel gauge for multi-cell lithium-ion batteries Supports 2-cell to 4-cell battery pack configurations Integrated ModelGauge m5 EZ algorithm with no battery relearning required Integrated battery protector with autonomous safety monitoring Supports overvoltage, undervoltage, overcurrent, short-circuit, and thermal protection Integrated current-sense amplifier for accurate current measurement Low quiescent current optimized for portable and always-on systems I²C-compatible communication interface Configurable alert and interrupt functions Battery aging compensation and cycle tracking Supports battery authentication functionality Integrated ADCs for voltage, current, and temperature monitoring Programmable protection thresholds and timing parameters Low-power hibernate and sleep operating modes Electrical Characteristics Designed for lithium-ion and lithium-polymer battery chemistries Supports battery stack voltages corresponding to 2S to 4S configurations High-resolution voltage, current, temperature, and capacity measurements Low operating current suitable for battery-powered systems Integrated precision coulomb counter Wide operating temperature range suitable for industrial applications Protection Functions Cell overvoltage protection Cell undervoltage protection Charge overcurrent protection Discharge overcurrent protection Short-circuit protection Overtemperature and undertemperature protection Permanent failure detection and fault logging Autonomous FET control for pack isolation Interface and Control I²C serial communication interface Programmable registers for protection and fuel gauge configuration Interrupt and alert outputs for fault and status indication Supports host processor communication and diagnostics Nonvolatile memory for configuration storage Package Information Package type is TQFN Compact surface-mount package suitable for space-constrained designs RoHS compliant and lead-free package option Typical Applications Smart battery packs Portable medical devices Industrial handheld equipment IoT and wireless sensor devices Battery-powered consumer electronics Portable test and measurement systems Rechargeable multi-cell battery systems #commonpartslibrary #integratedcircuit #powermanagement #batterymanagement

Battery Battery Monitor IC Lithium Ion 9-DSBGA The BQ27220YZFR is a highly integrated single-cell battery fuel gauge IC developed for rechargeable lithium-ion and lithium-polymer battery applications. The device utilizes Texas Instruments’ Impedance Track™ algorithm to provide highly accurate battery capacity measurement, state-of-charge estimation, runtime prediction, and battery health monitoring across varying load and temperature conditions. The device is designed for compact portable electronics, wearable devices, IoT products, handheld instruments, and low-power embedded systems requiring precise battery monitoring and extended operating life. The BQ27220YZFR supports system-side fuel gauging without requiring battery pack-side electronics, simplifying battery integration and reducing overall system cost. The fuel gauge continuously monitors battery voltage, current, and temperature to estimate available capacity, remaining runtime, full charge capacity, and state-of-health information. Integrated low-power operation enables ultra-low standby current consumption suitable for always-on battery-powered products. Communication with the host processor is implemented through a standard I²C interface, allowing configuration access, telemetry reporting, and battery parameter monitoring. The device also integrates protection and alert functionality through programmable interrupt outputs and battery condition monitoring features. The BQ27220YZFR is optimized for use with single-cell lithium-based chemistries and supports learning cycles for adaptive battery characterization over product lifetime. Internal data flash memory stores battery profile information and calibration parameters to improve long-term gauging accuracy. The device is supplied in a compact lead-free wafer chip-scale package suitable for space-constrained PCB designs and portable electronics requiring minimal footprint and low-profile assembly. Electrical Characteristics Device Type Single-cell battery fuel gauge and battery monitor IC Battery Chemistry Support Lithium-ion and lithium-polymer rechargeable batteries Input Voltage Range Supports single-cell battery operation Fuel Gauging Method Impedance Track™ algorithm Communication Interface I²C serial interface Measurement Functions Battery voltage monitoring Battery current monitoring Battery temperature monitoring State-of-charge estimation Remaining capacity calculation Full charge capacity estimation State-of-health reporting Runtime prediction Power Consumption Ultra-low operating current for portable applications Temperature Monitoring External thermistor support Host Alert Features Interrupt and alert reporting capability Data Storage Integrated nonvolatile configuration memory Calibration Features Automatic learning and battery characterization support Protection Monitoring Battery condition and system monitoring functions Package Type DSBGA wafer chip-scale package Mounting Style Surface mount Operating Temperature Range Industrial temperature operation suitable for portable electronics Functional Features High-accuracy fuel gauging over battery lifetime Adaptive battery modeling and aging compensation Low-power operation for battery-powered systems Integrated battery profiling capability Real-time remaining runtime estimation Automatic battery learning cycles Compact PCB footprint for portable devices System-side implementation without smart battery pack requirement Programmable battery alert functionality Support for low-power embedded processors and mobile systems Optimized for wearable and IoT applications RoHS compliant and lead-free package construction #commonpartslibrary #integratedcircuit #powermanagement #batterymanagement

Battery Multi-Function Controller IC Lithium Ion/Polymer 32-VFQFPN (5x5) L9961 is part of a complete battery pack monitoring, balancing, and protecting system for Li-Ion and Li-Polymer cells in 3, 4 or 5 series configurations. The L9961 uses a high precision ADC to provide cell voltage, stack voltage and temperature conversion via external NTC. Voltage monitoring functions are cyclically performed with a programmable loop time. Stack current is also monitored via a high accuracy CSA, continuously running and performing also Coulomb counting. Cell balancing is available and can be simultaneously activated on all cells. IC configuration and information exchange for SOC/SOH estimation are performed via I2C peripheral. The IC also integrates a dual pre-driver programmable in both HS/LS configurations for driving pack relays. L9961 also implements battery pack fuse protection to prevent fire and explosion hazards. A 3.3 V regulator with a high current capability is available for supplying pack controller and other external circuitry in both standby and normal operation modes. The IC protects the battery pack against over/under voltage conditions and monitors for over/ under temperature. It also features protection against overcurrent (both directions) and short-circuit in discharge events. Safety-relevant configurations can be stored in the internal NVM to avoid re-programming the device at each wake-up. Features • 2 μA shipment - DEEP SLEEP mode current and 5 μA standby consumption (with VREG LDO active) standby consumption (with VREG LDO active) • Integrated 3.3 V VREG LDO for supplying MCU and LEDs • Measures cell voltage (3 to 5 cells), with over/undervoltage detection and balance undervoltage protection • 12-bit voltage measurement with maximum error of ±15 mV in the [1.5 – 4.5] V range, for -40 °C < TJ < 105 °C • Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells • Measures pack temperature via NTC, with over/undertemperature detection • Ratiometric temperature measurement with ±0.8% max. gain error in the [0.2 – VREG] V range, for -40 °C < TJ < 105 °C • Measures battery current, with Coulomb counting, overcurrent (both directions) and short-circuit in discharge protection. • 16-bit signed current measurement with 0.1% full scale error at room temperature • I 2C peripheral for device programming and data transfers over I2C bus • Cell balancing supporting up to 70 mA per cell • Dual configurable HS/LS predriver for pack relay management • Pack fuse management • Embedded NVM for configuration parameters storage • High hotplug robustness Applications • Cordless power tools • Backup energy storage systems and UPS • Light electric vehicles (e-bikes, scooters, etc.) • Portable and semi-portable equipment • Medical equipment #L9961TR #BatteryManagement #BMS #LiIonBattery #LiPoBattery #STMicroelectronics #BatteryProtection #CellBalancing #CoulombCounting #PowerManagement #EmbeddedSystems #EnergyStorage #EBike #PowerTools #ElectronicsDesign

1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 #CommonPartsLibrary #IntegratedCircuit #PowerManagement #BatteryManagement #BQ40Z50

2 to 16 Stacked Cells Battery Pack Fuel Gauge #ultralibrarian

BQ7961x-Q1 family (BQ79612-Q1, BQ79614-Q1, BQ79616-Q1, BQ79616H-Q1) are automotive-grade, functional safety-compliant battery monitoring and balancing ICs from Texas Instruments for high-voltage Battery Management Systems (BMS). The devices support 12, 14, or 16 series-connected lithium-ion battery cells and provide high-accuracy voltage measurements, integrated cell balancing, hardware protection, temperature monitoring, and isolated daisy-chain communication. Designed for hybrid and electric vehicles (HEV/EV) and energy storage systems (ESS), the BQ7961x-Q1 family supports ISO 26262 functional safety up to ASIL D, integrated diagnostics, redundant voltage measurement paths, configurable digital filtering, and stackable architectures for large battery packs. The family offers precise battery state monitoring, enhanced safety, and scalable BMS implementation for automotive and industrial energy storage applications. Search Keywords: BQ79612-Q1, BQ79614-Q1, BQ79616-Q1, BQ79616H-Q1, BQ7961x-Q1, Texas Instruments BQ79616, Battery Monitor IC, Battery Management System IC, BMS Controller, Automotive BMS, EV Battery Monitor, Cell Balancing IC, High Voltage Battery Monitor, ISO26262 ASIL-D, Automotive Battery Protection, Lithium Battery Monitor, Energy Storage BMS, Stackable Battery Monitor, Battery Pack Monitoring, Cell Voltage Measurement IC, Electric Vehicle Battery Management Hashtags: #BQ79612Q1 #BQ79614Q1 #BQ79616Q1 #BQ79616HQ1 #BQ7961xQ1 #TexasInstruments #BatteryManagementSystem #BMS #CellBalancing #BatteryMonitor #ElectricVehicle #EVBattery #EnergyStorage #LithiumBattery #AutomotiveElectronics #ISO26262 #ASILD #PowerElectronics #EmbeddedSystems #HardwareDesign BQ79612-Q1

2 to 10 Stacked Cells Battery Pack Fuel Gauge with Level LEDs #ultralibrarian

2 to 16 Stacked Cells Battery Pack Fuel Gauge #ultralibrarian

I2C-Controlled 5A Buck or Boost Charger with NVDC Power Management and USB OTG for 2-Cell to 4-Cell Battery Pack Applications #ultralibrarian

Battery Power Management IC Multi-Chemistry 14-TSSOP The bq34210-Q1 1-Series Cell System-Side CEDV Fuel Gauge provides fuel gauging and End-of-Service (EOS) Determination for 1-series cell batteries in applications that encounter infrequent discharge, such as eCall systems and uninterruptible power supplies (UPS) for backup during power failures, where batteries may stay connected to a charging power source most of their lifetime until needed. The bq34210-Q1 fuel gauge supports multiple battery chemistries, including Li-Ion, LiFePO4, and NiMH. The gas gauging function uses voltage, current, and temperature data along with Compensated End-ofDischarge (CEDV) technology to provide State-ofCharge (SOC) and State-of-Health (SOH) data. The device's EOS Determination function alerts when battery capability has degraded and is approaching the end of its usable service. Battery fuel gauging with the bq34210-Q1 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery management system. Features 1• Automotive-Qualified AEC-Q100, Grade 3 • 1-Series Cell Battery Fuel Gauge Supports Li-Ion, LiFePO4, and NiMH (3-Cell) Chemistries – Resides on System Board – Powers Directly from the Battery with Integrated LDO – Supports a Low-Value External Sense Resistor (10 mΩ) • Learning Load Enable (LEN) from Host • Ultra-Low Power Consumption in NORMAL (50 µA) and SLEEP (9 µA) Modes • Supports Replacement Batteries • Accurate End-of-Service (EOS) Determination for Batteries in Rarely Discharged Applications • CEDV Gas Gauge for 1-Series Cell Batteries, Providing: – State-of-Charge (SOC) – Time-to-Empty (TTE) – State-of-Health (SOH) • High-Side and Low-Side Current Sensing Options • Internal Temperature Sensor OR External Thermistor • Microcontroller Peripheral Interface Supports: – 400-kHz I 2C™ Serial Interface – Configurable Interrupt (ALERT) for SOC, Battery Levels, Temperature Faults, and Charge/Discharge Status 2 Applications • eCall Systems • Telematics Backup Systems • Uninterruptible Power Supply (UPS) Backup Systems • Emergency Battery Power Modules #BatteryFuelGauge #BatteryManagement #FuelGaugeIC #AutomotiveElectronics #TexasInstruments #LiIonBattery #LiFePO4 #I2C #PowerManagement #AECQ100 #BackupBattery #UPS #EmbeddedSystems

I2C-Controlled 5A Buck or Boost Charger with NVDC Power Management and USB OTG for 2-Cell to 4-Cell Battery Pack Applications #ultralibrarian

A nifty and modular off-grid solar power battery pack. Battle tested at Burning Man 🔥

36V Standalone Switching Charger with Integrated MOSFETs for 3-Cell to 6-Cell Series Battery Pack #ultralibrarian

36V Standalone Switching Charger with Integrated MOSFETs for 3-Cell to 6-Cell Series Battery Pack #ultralibrarian

2 to 10 Stacked Cells Battery Pack Fuel Gauge #ultralibrarian

2 to 10 Stacked Cells Battery Pack Fuel Gauge #ultralibrarian

I2C-Controlled 5A Buck or Boost Charger with NVDC Power Management and USB OTG for 2-Cell to 4-Cell Battery Pack Applications #ultralibrarian

2 to 10 Stacked Cells Battery Pack Fuel Gauge with Level LEDs #ultralibrarian

I2C-Controlled 5A Buck or Boost Charger with NVDC Power Management and USB OTG for 2-Cell to 4-Cell Battery Pack Applications #ultralibrarian

I2C-Controlled 5A Buck or Boost Charger with NVDC Power Management and USB OTG for 2-Cell to 4-Cell Battery Pack Applications #ultralibrarian