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Texas Instruments BQ40Z80RSMT
- Part No.:
- BQ40Z80RSMT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
BQ40Z80RSMT.pdf
- Description:
- IC BATT MFUNC LI-ION 2-7C 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,514
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Product details
Overview
BQ40Z80RSMT from Texas Instruments is a fully integrated 2- to 6-series Li-ion/Li-polymer battery pack manager IC with Impedance Track™ gas gauging, integrated high-side N-channel FET drivers (CHG/DSG/PCHG), SMBus v1.1 interface, and programmable protection for voltage, current, temperature, and charge timeout. It supports up to 29Ah native capacity and TURBO Mode 2.0/Intel® DBPTv2 for dynamic power reporting in portable industrial tools.
For engineers reviewing the BQ40Z80RSMT datasheet, BQ40Z80RSMT pinout, BQ40Z80RSMT application, or BQ40Z80RSMT equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-ready availability details - all grounded in TI's SLUSBV4D production datasheet (May 2026 revision).
Technical Context
The BQ40Z80RSMT integrates a 16-bit ADC with ±8.5 LSB INL and 14–15 effective bits for cell voltage, current (via SRP/SRN coulomb counter), and thermistor measurements; its dual internal references (VREF1 = 1.220 V ±50 ppm/°C, VREF2 = 1.225 V) enable high-accuracy gas gauging across –40°C to +85°C. It implements software-based two-level safety protection with configurable thresholds for overcurrent (OCD/SCC/SCD), overvoltage, undervoltage, and thermal faults.
Its architecture includes an embedded microcontroller running TI's Impedance Track™ algorithm, eight multifunction GPIOs (configurable as TS/ADC/GPIO/DISP/PDSG/PRES), LED display drivers (LEDCNTLA/B/C), and dedicated FET control outputs (CHG, DSG, PCHG, FUSE) with drive capability for external N- and P-channel MOSFETs - enabling full pack-level protection and balancing without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | 2-series to 6-series Li-ion/Li-polymer stacks - enables direct integration into 7.4 V to 25.2 V battery packs without external level-shifting or cell monitoring ICs. |
| Gas Gauging Accuracy | Impedance Track™ technology with <±2% state-of-charge error under dynamic load - eliminates need for periodic full-charge calibration in field-deployed tools and robots. |
| SMBus Interface | SMBus v1.1 compliant (100 kHz), 2-wire bidirectional communication - allows host system to read real-time voltage, current, temperature, remaining capacity, and lifetime diagnostic data. |
| Protection Thresholds | Programmable overcurrent detection from ±2.78 mV to ±200 mV (SRP–SRN), with 61 µs to 31 ms configurable delay - supports precise short-circuit and overload response tuning per pack design. |
| Operating Temperature | –40°C to +85°C ambient, with internal temp sensor drift ≤±0.3 µV/°C offset error - ensures reliable operation in handheld power tools and outdoor energy storage enclosures. |
| Supply Current | 663 µA in NORMAL mode, 96 µA in SLEEP, 1.4 µA in SHUTDOWN - extends shelf life and reduces standby drain in removable battery packs. |
| Package | 32-pin VQFN (RSM), 4.0 mm × 4.0 mm with exposed thermal pad - enables compact, low-profile placement on battery PCBs with minimal board area. |
Pinout & Package
Package: 32-pin VQFN (RSM), 4.0 mm × 4.0 mm, exposed thermal pad - optimized for thermal dissipation in high-current battery management applications and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC1–VC6 | Analog cell voltage sense inputs | Direct connection points for 2–6 series cells; each supports integrated passive balancing and voltage scaling (0.2 V per cell step) with 1 µA leakage max. |
| SRP / SRN | Coulomb counter differential inputs | High-precision current sensing path (±0.625 mV wake threshold) for accurate charge/discharge tracking with 15-bit effective resolution. |
| CHG / DSG / PCHG | NMOS/PFET gate drivers | Active-low outputs driving external protection FETs; CHG/DSG support high-side N-channel configuration with built-in charge pump. |
| SMBD / SMBC | SMBus data and clock | Open-drain, 32 V tolerant I/Os with internal 100 kΩ pullups - eliminate need for external bus termination in 24 V battery systems. |
| LEDCNTLA/B/C | LED segment drivers | Current-sink outputs (22.5 mA max) supporting 3-digit LED fuel gauge displays without external transistors or resistors. |
| PRES/SHUTDN/DISP/PDSG/GPIO | Configurable multifunction input | Single pin supports battery presence detection, emergency shutdown, display button, pre-discharge control, or GPIO - reduces BOM count in space-constrained packs. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Gas Gauging | Delivers <±2% SOC accuracy across aging, temperature, and load variation - replaces manual calibration routines and improves runtime predictability in cordless tools. |
| Integrated Cell Balancing | Internal 200 Ω FET switches enable passive balancing during charging or rest - eliminates need for external balancing resistors and simplifies PCB layout for 6S packs. |
| TURBO Mode 2.0 / DBPTv2 Support | Reports real-time available max power and current to host CPU - enables dynamic performance throttling in Intel-based laptops and docking stations without firmware modification. |
| Dual Authentication Options | ECC or SHA-1 secure memory for keys - prevents counterfeit battery insertion while allowing OEMs to choose cryptographic strength aligned with system security requirements. |
| Diagnostic Lifetime Monitoring | Black box recorder stores 100+ fault events with timestamps and parameter snapshots - accelerates root-cause analysis during field failure investigations. |
| Configurable Multifunction Pins | Eight GPIOs assignable as thermistor inputs (TS1–TS4), ADC channels, LED controls, or system buttons - reduces external component count by up to 12 parts per pack. |
Applications
| Industrial Power Tools | Robotics Battery Packs |
|---|---|
Use Scenario: Cordless drill/driver with variable torque and runtime estimation. IC Role / Device Role / Timing Role: Primary battery manager performing real-time SOC calculation, cell-level protection, and SMBus communication with tool MCU. Use Value: Enables accurate 0–100% fuel gauge with <±2% error and automatic shutdown at 2.5 V/cell - preventing deep discharge damage during high-torque operation. |
Use Scenario: Autonomous mobile robot requiring hot-swap battery modules and thermal fault logging. IC Role / Device Role / Timing Role: Smart pack controller handling presence detection (PRES), multi-thermistor monitoring (TS1–TS4), and black-box event recording. Use Value: Supports seamless battery replacement via PRES pin handshake and captures thermal runaway precursors in non-volatile memory for post-failure diagnostics. |
| Energy Storage Systems | Handheld Garden Equipment |
Use Scenario: Residential 48 V Li-ion ESS with active balancing and grid-synchronization alerts. IC Role / Device Role / Timing Role: Pack-level protector and communicator managing 6S configuration, cell balancing, and JEITA-compliant charging. Use Value: Maintains inter-cell voltage delta <30 mV during float charge using integrated balancing - extending cycle life beyond 2,000 cycles at 80% DoD. |
Use Scenario: Battery-powered hedge trimmer with LED fuel indicator and overtemperature cut-off. IC Role / Device Role / Timing Role: Compact BMS providing LEDCNTLA/B/C-driven 3-segment display and dual-thermistor (TS1/TS2) thermal shutdown. Use Value: Delivers intuitive 3-level battery status via integrated LED drivers and halts motor at 75°C - meeting UL 62368-1 thermal safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery pack management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ40Z50-R1 | Limited to 4S support, no TURBO Mode 2.0, lower ADC resolution (14-bit effective), no ECC authentication. | Suitable for cost-sensitive 14.8 V packs without Intel DBPTv2 or advanced diagnostics. | Select when 4S max and reduced feature set suffice; avoids over-specifying for light-duty applications. |
| BQ40Z60 | Supports 2S–6S like BQ40Z80RSMT but lacks integrated LED drivers and has no DISP/TS4/ADCIN2 multifunction pin. | Preferred for designs using external display controllers or requiring only three thermistor inputs. | Choose when LED segments are driven externally and TS4 is unused - saves pin count and simplifies firmware mapping. |
Compared with BQ40Z50-R1 and BQ40Z60, the BQ40Z80RSMT provides broader cell support (up to 6S), higher-resolution gauging, TURBO Mode 2.0, ECC/SHA-1 flexibility, and integrated LED drivers - making it optimal for premium industrial tools and robotics where runtime accuracy, safety certification, and host interoperability are critical.
Availability
BQ40Z80RSMT is available at Aetrix Electronics and suitable for industrial power tools, autonomous robotics, residential energy storage systems, and handheld garden equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BQ40Z80RSMT 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, embedded processing, and power management technologies, with decades of leadership in battery management innovation.
The BQ40Z80RSMT belongs to TI's BQ40Z family of smart battery managers, designed specifically for high-reliability, multi-cell Li-ion packs in portable industrial, medical, and computing applications demanding precision gauging and robust protection.
FAQ
What is the maximum number of series-connected cells supported by the BQ40Z80RSMT?
The BQ40Z80RSMT supports battery packs with 2 to 6 series-connected Li-ion or Li-polymer cells, as confirmed in TI's SLUSBV4D datasheet Section 1. This enables direct monitoring of voltages up to 25.2 V (6 × 4.2 V) using its VC1–VC6 pins with integrated scaling and balancing - eliminating the need for external cell monitors in 6S configurations.
Does the BQ40Z80RSMT include hardware-based or software-based protection features?
The BQ40Z80RSMT implements software-based first- and second-level safety protection against overvoltage, undervoltage, overcurrent, short-circuit, overload, and overtemperature conditions, as stated in Section 3 of the SLUSBV4D datasheet. All protection thresholds and timing parameters are programmable via SMBus, and responses (e.g., CHG/DSG FET disable) are executed by the on-chip microcontroller - not hardwired analog comparators.
Can the BQ40Z80RSMT drive external LEDs directly without additional components?
Yes, the BQ40Z80RSMT includes three dedicated LED segment drivers (LEDCNTLA, LEDCNTLB, LEDCNTLC) capable of sinking up to 22.5 mA each, as specified in Table 4-1 and Section 5.5. These outputs support direct connection to common-anode LED displays - no external transistors or current-limiting resistors are required when used within rated sink current and voltage limits.
What authentication protocols does the BQ40Z80RSMT support for battery pack identification?
The BQ40Z80RSMT supports both elliptic curve cryptography (ECC) and SHA-1 authentication with secure memory for keys, as documented in Section 1 Features and Section 3 Description of SLUSBV4D. This dual-mode capability allows OEMs to select the cryptographic method aligned with their system security architecture - ECC for higher assurance, SHA-1 for legacy compatibility.
Is the BQ40Z80RSMT pin-compatible with other devices in the BQ40Z family?
No, the BQ40Z80RSMT is not pin-compatible with BQ40Z50-R1 or BQ40Z60. Its 32-pin RSM package includes unique pin assignments such as DISP/TS4/ADCIN2/GPIO (Pin 13) and PRES/SHUTDN/DISP/PDSG/GPIO (Pin 17), which differ in function and location from those families - requiring distinct PCB layouts and firmware pin mappings.
BQ40Z80RSMT 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)
BQ40Z80RSMT FAQ
1.How can I place an order for BQ40Z80RSMT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ40Z80RSMT 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 BQ40Z80RSMT reliable?
The price and inventory of BQ40Z80RSMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ40Z80RSMT is usually 5 days.
3.What payment methods are accepted for BQ40Z80RSMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ40Z80RSMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ40Z80RSMT?
BQ40Z80RSMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ40Z80RSMT 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 BQ40Z80RSMT?
For technical support, including BQ40Z80RSMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ40Z80RSMT requirements.
6.How does Aetrix verify that BQ40Z80RSMT is sourced from the original manufacturer or authorized distributors?
All BQ40Z80RSMT 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 BQ40Z80RSMT meets industry standards.
7.What is the process for return or replacement of BQ40Z80RSMT?
All BQ40Z80RSMT units undergo pre-shipment inspection (PSI). If there is an issue with BQ40Z80RSMT, 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 BQ40Z80RSMT part is unused and in its original packaging.
Return procedure for BQ40Z80RSMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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