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Home Product BQ4050RSMR Battery Fuel Gauge IC, Li-Ion Cell Monitor, SMBus BMS Management Solution
BQ4050RSMR Texas Instruments

BQ4050RSMR Battery Fuel Gauge IC, Li-Ion Cell Monitor, SMBus BMS Management Solution

BQ4050RSMR
BQ4050 battery manager
lithium fuel gauge IC
BQ4050RSMR
BQ4050RSMR is a BQ4050 battery manager and lithium fuel gauge IC providing advanced monitoring, protection, and balancing for multi-cell Li-based battery packs with integrated safety features and high-accuracy capacity measurement.
Categories:Electronic components
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Product Description

The BQ4050RSMR is a lithium fuel gauge IC and battery manager designed for monitoring and managing multi-cell lithium-based battery packs. It features integrated inputs for voltage, current, and temperature sensing, supporting up to 4 series-connected cells. The device directly interfaces with external protection circuits and includes a built-in SMBus/I2C communication interface for system integration. Operating within 2.7V to 4.5V, it functions reliably across -40°C to +85°C, making it ideal for automotive, industrial, and portable electronics. The BQ4050RSMR offers high-accuracy state-of-charge (SOC) estimation, cell balancing, and fault detection, with support for capacities up to 25Ah. Key advantages include robust safety features and adaptive learning, though it requires precise calibration. It does not include a screen but enables remote monitoring via digital interfaces. Detection of battery parameters like voltage (±10mV) and current (±0.5% FS) ensures precise management.
Parameter Specification
Device Type BQ4050 battery manager lithium fuel gauge IC
Battery Chemistry Support Li-ion/Li-polymer
Voltage Range 2.7V to 4.5V (Cell), 9V to 18V (Pack)
Communication Interface I2C/SMBus with HDQ
Integrated Protections Over-voltage, Under-voltage, Over-current, Over-temperature
Capacity Measurement ±1% accuracy with Impedance Track™ algorithm
Pack Configuration 1-series to 4-series cell support
Package Type 32-pin QFN (RSMR)
Operating Temperature -40°C to +85°C
Safety Certifications UL/IEC 62368-1 compliant
question:Why was the product label cut upon receipt?
answer:Labels are removed to comply with destination country import regulations and avoid origin identification during customs clearance.
question:Can you provide shipment photos or purchase dates for similar products?
answer:Yes, we can share product photos and purchase details upon request, excluding sensitive supplier or contractual information.
question:Is low-value declaration possible for shipments?
answer:Low-value declarations depend on destination country laws. We follow legal requirements and advise confirming local regulations in advance.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:Why was the product label cut upon receipt?
answer:Labels are removed to comply with destination country import regulations and avoid origin identification during customs clearance.
question:Can you provide shipment photos or purchase dates for similar products?
answer:Yes, we can share product photos and purchase details upon request, excluding sensitive supplier or contractual information.
question:Is low-value declaration possible for shipments?
answer:Low-value declarations depend on destination country laws. We follow legal requirements and advise confirming local regulations in advance.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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