BQ40Z60RHBR

Texas Instruments BQ40Z60RHBR – 2–4 Cell Li‑ion Fuel Gauge and Pack Manager with SMBus

Engineers and sourcing teams looking for an accurate, pack‑side battery manager will recognize the value of the Texas Instruments BQ40Z60RHBR. Part of TI’s bq40z family, this device combines an Impedance Track fuel‑gauge algorithm with integrated protection and cell balancing for 2–4 series Li‑ion/Li‑polymer cells. It comes in a compact 32‑VQFN (RHB) 5×5 mm package and communicates over SMBus (I2C‑compatible), making it a strong fit for multi‑cell portable, industrial, and embedded designs.

Links for quick reference:

• Product page: https://www.ti.com/product/BQ40Z60
• Datasheet: https://www.ti.com/lit/ds/symlink/bq40z60.pdf

Overview

The Texas Instruments BQ40Z60RHBR is a pack‑side, multi‑cell battery manager designed to simplify the design of 2–4 series cell Li‑ion/Li‑polymer battery packs while delivering precise state‑of‑charge (SoC) reporting. By leveraging TI’s Impedance Track algorithm, it helps maintain accuracy across load profiles and battery aging. Integrated protection and cell balancing features reduce external component count and improve overall pack reliability.

• Brand/Manufacturer: Texas Instruments (TI)
• Series/Family: bq40z
• Category: Battery Management ICs
• Device: BQ40Z60RHBR (32‑VQFN, RHB package code)
• Mounting: Surface‑mount
• Pin count: 32

This part targets applications where accurate fuel gauging, robust protection, and dependable cell balancing are critical, such as industrial handhelds, portable instrumentation, medical devices (non‑life‑support), e‑mobility accessories, and embedded systems.

Key Features and Benefits

• 2–4 series cell support: Enables flexible pack configurations for common 2S, 3S, and 4S Li‑ion/Li‑poly stacks.
• Impedance Track fuel‑gauge algorithm: TI’s proven method for estimating state‑of‑charge and state‑of‑health over battery life and varying load conditions.
• Integrated protection: On‑chip pack protection features (refer to the datasheet for the detailed set) help reduce external circuitry and improve pack safety.
• Cell balancing: Integrated balancing helps maintain cell‑to‑cell consistency, supporting pack longevity and usable capacity.
• SMBus (I2C‑compatible) interface: Facilitates communication with the system host for data logging, configuration, and runtime monitoring.
• Compact footprint: 32‑VQFN (RHB) 5×5 mm package conserves board area in space‑constrained designs.
• Wide operating temperature: −40°C to +85°C supports industrial environments.

Detailed Specifications

Only verified information from the provided product data is included below.

• Function: Battery fuel gauge and pack manager with protection
• Battery chemistry: Li‑ion / Li‑polymer
• Cell configuration: 2 to 4 series cells
• Algorithm: Impedance Track
• Interface: SMBus (I2C‑compatible)
• Operating temperature: −40°C to +85°C
• Package: 32‑VQFN (RHB), 5×5 mm
• Pin count: 32
• Mounting type: Surface mount
• Packaging: Tape & Reel (TR)

If you require parameters such as detailed protection thresholds, data flash memory size, measurement resolution, or timing specifications, consult the TI datasheet linked above. Those values can vary by configuration and use case and are not listed here.

How the BQ40Z60RHBR Adds Value in Your Design

• Accuracy over time: The Impedance Track algorithm is designed to maintain fuel‑gauge accuracy as the pack ages, minimizing drift that can lead to early shutdowns or unexpected run‑time gaps.
• System reliability: Integrated protection and cell balancing reduce the burden on external circuitry, streamlining compliance with pack‑level safety objectives and helping improve field reliability.
• Design efficiency: A single pack‑side device that handles measurement, estimation, and protection can shorten development cycles and simplify manufacturing test.
• Serviceability: Rich telemetry via SMBus helps OEMs and service teams diagnose pack condition in the field, aiding predictive maintenance and warranty analysis.

Applications

The Texas Instruments BQ40Z60RHBR is suited for multi‑cell battery pack designs where accurate SoC reporting and robust protection are required, including:

• Multi‑cell battery packs (2S to 4S)
• Portable and industrial equipment
• Embedded systems requiring accurate state‑of‑charge and pack protection
• Instrumentation, test equipment, and data acquisition packs
• Robotics, drones (auxiliary systems), and mobility accessories (when applicable to voltage/current ranges specified in the datasheet)

Package, Footprint, and Assembly

• Package: 32‑VQFN (RHB), 5×5 mm
• Mounting: Surface mount
• Pin count: 32
• Delivery format: Tape & Reel (TR)

Layout and assembly recommendations:

• Follow TI’s land pattern and thermal recommendations for the RHB package.
• Pay particular attention to current‑sense routing, grounding, and thermistor placement to ensure measurement integrity.
• Keep SMBus lines appropriately routed and pulled‑up per TI guidance and system requirements.
• For cell balancing and protection paths, review copper width, via counts, and thermal relief practices per the datasheet and application notes.

Always refer to the official TI footprint and layout guidance in the datasheet for exact dimensions and soldering profiles.

System Integration and Interface

• Host communication: SMBus (I2C‑compatible) provides a standard command set for reading fuel‑gauge data, alarms, and status, and for applying configuration.
• Pack integration: Designed as a pack‑side manager; it works alongside the system host and, when needed, complementary charger or power‑path controllers. Charging functionality is not described in the provided data; consult the TI documentation for system‑level charging architecture guidance.
• Configuration: Device behavior is typically tailored via configuration memory (details not provided here). Use TI’s recommended tools and procedures from the datasheet for safe programming and calibration.

Protection and Cell Balancing

• Integrated protection: The BQ40Z60RHBR includes on‑chip protection functions (specific thresholds and modes are not listed in the provided data). Refer to the datasheet for the complete protection feature set and configuration options.
• Cell balancing: Integrated balancing supports improved pack health by mitigating cell‑to‑cell variation. Balance strategy and limits should be set per the cell vendor’s recommendations and the application’s thermal design.

Design‑In Considerations

While exact numeric parameters must come from the TI datasheet, the following best practices apply broadly to pack‑side battery managers:

• Cell count selection: Ensure the configured cell count matches the physical pack (2S, 3S, or 4S) and verify sensor scaling and thresholds after configuration.
• Current sensing: Choose a shunt resistor value that balances measurement resolution and power dissipation. Route sense traces symmetrically and keep them away from noisy nets.
• Thermistors and temperature sensing: Place thermistors to represent both cell and pack temperatures realistically. Validate thermal response with worst‑case ambient and load conditions.
• Balancing policy: Define when and how balancing occurs (e.g., during charge, float, or at rest) and enforce safe temperature limits.
• Safety and compliance: Confirm that protection limits align with the cell manufacturer’s specifications and applicable standards. Perform pack‑level validation and fault‑injection tests.
• Firmware and SMBus: Document SMBus command use in your system firmware, including error handling and timeouts. Log critical events to aid service diagnostics.

Lifecycle, Sourcing, and Availability

• Lifecycle status: Not specified; verify current status on the TI product page.
• Inventory quantity (this listing): 0 at the time of writing. For procurement, check authorized distributors and TI’s supply updates.
• Replacements or pin‑compatible options: Not specified in the provided data. Evaluate other members of the bq40z family on TI’s website if you need alternates.

Sourcing tips:

• Secure the BOM early for designs that require multi‑cell packs to avoid delays from component lead times.
• Consider second‑source planning within the same family (where feasible) and validate form/fit/function thoroughly.
• Maintain a golden configuration image and calibration procedure for consistent production programming.

Environmental and Compliance

• Operating temperature: −40°C to +85°C
• RoHS/Environmental: Not specified in the provided data. Confirm RoHS and any regional environmental requirements with TI’s documentation and compliance portal.

If your application targets specific standards (e.g., IEC/UL for battery packs), use the datasheet and TI safety notes to map the BQ40Z60RHBR’s features to your compliance plan.

Why Choose Texas Instruments BQ40Z60RHBR

• Proven vendor and ecosystem: TI’s bq40z series is widely adopted, with mature algorithms and tools.
• Integration that matters: Bringing fuel gauging, protection, and balancing together reduces complexity at the pack level.
• Communication you can build on: SMBus (I2C‑compatible) connectivity fits seamlessly with embedded hosts and diagnostic tools.
• Scalable across models: The 2–4 cell range covers a broad swath of portable and industrial systems.

Frequently Asked Questions (FAQs)

Q: How many series cells does the Texas Instruments BQ40Z60RHBR support?
A: It supports 2 to 4 series Li‑ion/Li‑polymer cells.

Q: What interface does the BQ40Z60RHBR use for communication?
A: SMBus (I2C‑compatible).

Q: Does the BQ40Z60RHBR provide cell balancing?
A: Yes. Integrated cell balancing is noted in the product description. Refer to the datasheet for configuration details.

Q: What is the operating temperature range?
A: −40°C to +85°C, per the provided data.

Q: What is the package and size for the BQ40Z60RHBR?
A: 32‑VQFN (RHB), 5×5 mm, 32 pins, surface‑mount.

Q: Is a charger integrated into the BQ40Z60RHBR?
A: Charging functionality is not specified in the provided data. Treat the BQ40Z60RHBR as a pack‑side gauge/manager; consult the TI datasheet and product page for system‑level charging architecture recommendations.

Q: Is RoHS compliance documented?
A: Not specified here. Verify on TI’s product page and compliance documentation.

Resources

• Texas Instruments product page: https://www.ti.com/product/BQ40Z60
• Datasheet (symlink): https://www.ti.com/lit/ds/symlink/bq40z60.pdf

Summary

The Texas Instruments BQ40Z60RHBR is a compact, pack‑side fuel gauge and protection manager for 2–4 cell Li‑ion/Li‑polymer packs. With TI’s Impedance Track algorithm, integrated protection, and cell balancing, it offers the telemetry and safety foundation demanded by modern portable and industrial systems. Its SMBus (I2C‑compatible) interface ensures straightforward integration with embedded hosts, while the 32‑VQFN (RHB) 5×5 mm package minimizes board space.

For final specification values, threshold tables, and configuration procedures, rely on the official TI datasheet and tools. Verify lifecycle status and environmental compliance on the TI product page before design‑in to ensure long‑term availability and regulatory alignment.