# BQ41Z50RSNR (Component)
## Description
Battery Fuel Gauge IC Multi-Chemistry 32-QFN (4x4)
The BQ41Z50RSNR is a highly integrated battery fuel gauge and battery management IC designed for single-cell and multi-cell lithium-ion and lithium-polymer battery packs. It provides accurate battery monitoring, protection, authentication, and state estimation functions for portable, industrial, and embedded power applications. The device incorporates advanced Impedance Track™ fuel gauging technology to deliver precise state-of-charge, state-of-health, and runtime predictions across varying operating conditions and battery aging profiles.
The device integrates battery protection features including overvoltage, undervoltage, overcurrent, short-circuit, and temperature monitoring to enhance system safety and reliability. It supports SMBus and I²C communication interfaces for host processor interaction and system diagnostics. Internal flash memory allows programmable configuration parameters, calibration data, and battery profile storage.
The BQ41Z50RSNR is optimized for compact battery-powered systems requiring accurate fuel gauging, low power consumption, and robust battery protection capabilities. Typical applications include notebooks, handheld devices, industrial instruments, portable medical equipment, smart battery packs, and embedded rechargeable systems.
Engineering Specification
Device Type
Battery Fuel Gauge and Battery Management IC
Battery Chemistry Support
Lithium-Ion and Lithium-Polymer
Cell Configuration
Supports multi-cell battery pack configurations
Fuel Gauging Technology
Impedance Track™ battery fuel gauging
Integrated Functions
Battery monitoring
State-of-charge estimation
State-of-health estimation
Remaining runtime prediction
Battery protection
Cell balancing support
Authentication support
Temperature monitoring
Data logging and diagnostics
Protection Features
Overvoltage protection
Undervoltage protection
Overcurrent protection
Short-circuit protection
Charge and discharge protection
Thermal protection
Communication Interface
SMBus compatible
I²C compatible interface
Non-Volatile Memory
Integrated flash memory for configuration and battery profile storage
Measurement Functions
Battery voltage measurement
Current measurement
Temperature sensing
Capacity tracking
Cycle count monitoring
Operating Voltage
Designed for rechargeable battery pack applications
Power Consumption
Low-power operation optimized for portable devices
Package Type
QFN package
Mounting Type
Surface-mount device
Operating Temperature Range
Industrial operating temperature range suitable for portable and embedded applications
Typical Applications
Smart battery packs
Portable electronics
Industrial handheld equipment
Medical portable devices
Rechargeable embedded systems
Battery-powered instrumentation
#commonpartslibrary
#integratedcircuit
#powermanagement
## Component Details
- **Owner:** adrian95
- **Created:** 5/21/2026
- **Last Updated:** 5/23/2026
- **Visibility:** Public
- **Symbol Style:** parametric-v1
- **Manufacturer Part Number:** BQ41Z50RSNR
- **Part Type:** Integrated Circuits
- **Manufacturer Name:** Texas Instruments
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Datasheet URL:** https://www.ti.com/lit/ds/symlink/bq41z50.pdf?ts=1764318474404
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/bq41z50rsnr/texas-instruments.html?utm_currency=USD®ion=nac) | N/A | N/A |
| [LCSC](https://www.lcsc.com/product-detail/C48397778.html) | $7.4606 | 33 |
| [Mouser](https://www.mouser.com/ProductDetail/Texas-Instruments/BQ41Z50RSNR?qs=2FehpBK1j95h5MRSV2e3rA%3D%3D) | $5.67 | 1.4K |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** Texas Instruments
- **MPN:** BQ41Z50RSNR
- **Mount Type:** Surface Mount
- **Package / Case Code:** 32-QFN
- **Pin Count:** 33
- **Logic Function:** AND
## Pins
| Pin | Name | Type |
|-----|------|------|
| 18 | BAT | |
| 14 | VCC | |
| 5 | ~ALERT | |
| 7 | ~PRES~/_~SHUTDN | |
| 3 | LEDCNTLA/GPIO4 | |
| 4 | LEDCNTLB/GPIO5 | |
| 32 | ~DISP~/GPIO7 | |
| 8 | LEDCNTLC/GPIO6 | |
| 12 | FUSE | |
| 17 | CHG | |
| 13 | PCHG | |
| 16 | DSG | |
| 9 | GPIO1 | |
| 10 | GPIO2 | |
| 6 | GPIO3 | |
| 15 | PACK | |
| 30 | REG18 | |
| 31 | REG135 | |
| 2 | SMBC | |
| 1 | SMBD | |
| 25 | SRN | |
| 24 | SRP | |
| 27 | TS2 | |
| 28 | TS3 | |
| 26 | TS1 | |
| 29 | TS4 | |
| 20 | VC3 | |
| 23 | VC0 | |
| 22 | VC1 | |
| 19 | VC4 | |
| 21 | VC2 | |
| 11 | VSS | |
| 33 | EP | |
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