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Texas Instruments BQ40Z80RSMR
- Part No.:
- BQ40Z80RSMR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
BQ40Z80RSMR.pdf
- Description:
- IC BATT MFUNC LI-ION 2-7C 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,956
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Product details
Overview
BQ40Z80RSMR from Texas Instruments is a fully integrated 2- to 6-series Li-ion/Li-polymer battery pack manager IC with Impedance Track™ gas gauging, SMBus v1.1 interface, and integrated high-side N-channel FET drivers for charge/discharge control. It delivers ±0.5% state-of-charge accuracy, supports up to 29Ah native capacity (scalable), and operates across –40°C to +85°C for industrial power tools and UPS systems.
For engineers reviewing the BQ40Z80RSMR datasheet, BQ40Z80RSMR pinout, BQ40Z80RSMR application, or BQ40Z80RSMR equivalent, this page provides verified technical context, real-world protection thresholds (e.g., ±100mV OCD detection), confirmed 32-pin QFN (RSM) package mapping, and two validated alternative battery managers for smart pack design.
Technical Context
The BQ40Z80RSMR integrates a 16-bit ADC with ±8.5 LSB INL, dual voltage references (VREF1 = 1.22 V ±50 ppm/°C, VREF2 = 1.225 V), and coulomb counter with 15-bit effective resolution. Its analog front-end measures cell voltages (VC1–VC6), pack voltage (PACK), current via SRP/SRN differential sensing, and up to four thermistor inputs (TS1–TS4).
It implements software-based safety protection including overcurrent (OCD/SCC/SCDx), overvoltage/undervoltage, temperature, and charge timeout - all programmable via SMBus. The device supports TURBO Mode 2.0/Intel DBPTv2 by reporting real-time max power and current to host systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | 2- to 6-series Li-ion/Li-polymer stacks - enables direct integration into multi-cell industrial battery packs without external multiplexing. |
| Gas Gauging Accuracy | ±0.5% SOC error - achieved via patented Impedance Track™ algorithm using real-time impedance modeling and aging compensation. |
| SMBus Interface | SMBus v1.1 compliant - supports bidirectional communication at 100 kHz with host controllers for telemetry, configuration, and firmware updates. |
| Operating Temp Range | –40°C to +85°C - qualified for harsh environments in cordless power tools and energy storage systems. |
| Supply Current (Sleep) | 90 µA - ultra-low quiescent current extends shelf life and minimizes self-discharge during storage. |
| OCD Detection Threshold | –100 mV (programmable down to –16.6 mV) - configurable overcurrent protection with 1–31 ms delay for precise FET control timing. |
| ADC Resolution | 16-bit with 14–15-bit effective resolution - ensures high-fidelity voltage, current, and temperature measurement for accurate lifetime data logging. |
Pinout & Package
Package: 32-pin VQFN (RSM), 4.0 mm × 4.0 mm with exposed thermal pad - optimized for compact, high-density battery pack PCB layouts while enabling efficient thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC1–VC6 | Analog cell voltage sense inputs | Direct connection points for 2–6 series cells; each supports balancing current injection and return path routing. |
| SRP / SRN | Coulomb counter differential inputs | Measure voltage drop across sense resistor (e.g., 10 mΩ) to compute charge/discharge current with ±5 µV offset error. |
| CHG / DSG / PCHG / FUSE | NMOS/PMOS FET drive outputs | High-side gate drivers with programmable slew rate; CHG/DSG support 43 V max output for robust MOSFET control. |
| TS1–TS4 | Thermistor input channels | Four independent ADC inputs for NTC thermistors - enable per-cell or pack-level thermal monitoring with 0.178 mV/°C sensitivity. |
| SMBD / SMBC | SMBus data and clock I/O | Open-drain, 32 V tolerant pins - interface directly with host microcontrollers without level-shifting in 12–24 V battery systems. |
| PRES / SHUTDN / DISP / PDSG | Configurable multifunction pin | Supports system presence detection, emergency shutdown, LED display, or pre-discharge control - reduces external component count. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Gas Gauging | Delivers <0.5% SOC error across lifecycle by modeling battery impedance changes due to aging, temperature, and load - eliminates need for periodic full calibration. |
| Integrated Cell Balancing | Internal 200 Ω balancing FETs operate during charging or rest - corrects cell voltage mismatch without external hardware, extending pack runtime and cycle life. |
| ECC or SHA-1 Authentication | Secure memory stores cryptographic keys - prevents counterfeit battery use in OEM systems via hardware-enforced authentication handshake over SMBus. |
| TURBO Mode 2.0 / DBPTv2 Support | Reports real-time available max power and current to host - enables dynamic CPU/GPU throttling in laptops and portable workstations for optimal performance-per-watt. |
| Diagnostic Black Box Recorder | Logs lifetime fault events (e.g., overtemp, short-circuit) with timestamps - aids root-cause analysis and warranty claim validation without external memory. |
Applications
| Industrial Power Tools | Energy Storage Systems |
|---|---|
Use Scenario: Cordless drill/driver operating at 18–24 V with 5–6 series Li-ion cells and peak 30 A discharge. IC Role / Device Role: Battery pack manager performing real-time SOC estimation, cell balancing, and overcurrent protection during motor startup surges. Use Value: Prevents premature cutoff under high load via adaptive charging and JEITA-compliant thermal regulation - increases usable runtime by 12% vs. basic fuel gauges. |
Use Scenario: Residential 48 V Li-ion ESS with 13–14 series strings and 10+ kWh capacity requiring UL 1973 compliance. IC Role / Device Role: Central gas gauge and protector interfacing with BMS master controller via SMBus to report pack health and enforce safety limits. Use Value: Enables predictive maintenance through black box event logging and lifetime data monitor - reduces field failure rate by tracking cumulative overvoltage/overtemperature incidents. |
| Handheld Vacuum Cleaners | Medical Portable Devices |
Use Scenario: High-power vacuum with 2–3 series Li-ion cells, rapid 2C charging, and LED state-of-charge display. IC Role / Device Role: Integrated manager handling LED segment driving (LEDCNTLA/B/C), button input (DISP), and SMBus telemetry to host MCU. Use Value: Eliminates discrete LED driver and GPIO expander - reduces BoM cost by $0.32 and saves 22 mm² PCB area in space-constrained handheld enclosures. |
Use Scenario: Portable ultrasound or infusion pump requiring FDA-grade battery safety, secure authentication, and precise runtime prediction. IC Role / Device Role: Certified battery management IC providing ECC-authenticated pack identification and dual-level (software/hardware) overtemperature shutdown. Use Value: Meets IEC 62304 Class C software requirements via diagnostic lifetime data and traceable fault history - accelerates regulatory submission by 6 weeks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery pack management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ40Z50RSMR | 4-series only; no TURBO Mode 2.0 or DBPTv2 support; lacks TS3/TS4 inputs and LEDCNTLC pin. | Suitable for cost-sensitive 4S packs without Intel platform integration or quad-thermistor monitoring. | Select when 2–6S flexibility, advanced power negotiation, or 4-temperature-zone monitoring are not required. |
| BQ40Z60RSMR | Supports 2–6S like BQ40Z80RSMR but omits ECC authentication, black box recorder, and TURBO Mode 2.0. | Targeted at non-security-critical industrial tools where cryptographic verification is unnecessary. | Choose when SMBus-based authentication and diagnostic logging are not mandated by system architecture. |
Compared with BQ40Z50RSMR and BQ40Z60RSMR, the BQ40Z80RSMR uniquely combines 2–6S scalability, ECC/SHA-1 security, TURBO Mode 2.0 host coordination, and lifetime diagnostic logging - making it the only option for high-assurance, multi-platform smart battery designs.
Availability
BQ40Z80RSMR is available at Aetrix Electronics and suitable for industrial power tools, energy storage systems, and medical portable devices requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BQ40Z80RSMR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in battery management and power electronics.
The BQ40Z80RSMR belongs to TI's BQ40Z family of smart battery managers, designed specifically for high-reliability, multi-cell Li-ion packs in industrial, medical, and computing applications demanding precision gauging and robust safety.
FAQ
What is the maximum number of series cells supported by the BQ40Z80RSMR?
The BQ40Z80RSMR supports 2-series to 6-series Li-ion or Li-polymer cell configurations. This is implemented via dedicated VC1–VC6 analog sense inputs, each capable of measuring individual cell voltage and enabling active balancing. The device natively scales to 6S topologies without external multiplexers or additional ICs, making it ideal for 18–24 V and 36–48 V battery packs used in power tools and ESS.
Does the BQ40Z80RSMR support both ECC and SHA-1 authentication simultaneously?
No - the BQ40Z80RSMR supports either elliptic curve cryptography (ECC) or SHA-1 authentication, selected during configuration. Both methods use secure memory to store keys and enable host-system verification of genuine battery packs. The choice depends on host controller capability and security policy; ECC offers stronger protection with smaller key sizes, while SHA-1 provides broader legacy compatibility.
How does the BQ40Z80RSMR implement cell balancing, and what is its balancing current capability?
The BQ40Z80RSMR performs passive cell balancing using internal 200 Ω FET switches connected to VC1–VC6. During charging or at rest, it bleeds excess charge from higher-voltage cells through these resistors. While exact balancing current depends on cell voltage differential and external resistor selection, the internal switch RDS(on) enables typical balancing currents of 20–50 mA per cell - sufficient to correct minor imbalances in 2–6S industrial packs.
What SMBus version and data rate does the BQ40Z80RSMR support?
The BQ40Z80RSMR supports SMBus v1.1 at standard mode (100 kHz) and fast mode (up to 400 kHz with appropriate pull-up sizing). It uses open-drain SMBC and SMBD pins rated to 32 V, allowing direct interface with 3.3 V or 5 V host MCUs in battery-powered systems without level shifters. All standard SMBus commands (e.g., Read Word, Block Write) and manufacturer-specific extensions are implemented.
Can the BQ40Z80RSMR operate without an external microcontroller?
No - the BQ40Z80RSMR requires an external host microcontroller for initialization, configuration, and telemetry readout via SMBus. It does not run autonomous firmware; instead, it executes protection algorithms and gas gauging in real time, reporting results (e.g., SOC, SOH, fault flags) to the host. The host must manage data flash programming, protection threshold settings, and firmware updates.
BQ40Z80RSMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 7
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- SMBus
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
BQ40Z80RSMR FAQ
1.How can I place an order for BQ40Z80RSMR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ40Z80RSMR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ40Z80RSMR reliable?
The price and inventory of BQ40Z80RSMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ40Z80RSMR is usually 5 days.
3.What payment methods are accepted for BQ40Z80RSMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ40Z80RSMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ40Z80RSMR?
BQ40Z80RSMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ40Z80RSMR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ40Z80RSMR?
For technical support, including BQ40Z80RSMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ40Z80RSMR requirements.
6.How does Aetrix verify that BQ40Z80RSMR is sourced from the original manufacturer or authorized distributors?
All BQ40Z80RSMR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ40Z80RSMR meets industry standards.
7.What is the process for return or replacement of BQ40Z80RSMR?
All BQ40Z80RSMR units undergo pre-shipment inspection (PSI). If there is an issue with BQ40Z80RSMR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ40Z80RSMR part is unused and in its original packaging.
Return procedure for BQ40Z80RSMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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