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Texas Instruments BQ40Z50RSMR-R1
- Part No.:
- BQ40Z50RSMR-R1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
BQ40Z50RSMR-R1.pdf
- Description:
- IC BATT MFUNC LI-ION 1-4C 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:10,902
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Product details
Overview
BQ40Z50RSMR-R1 from Texas Instruments is a single-chip, pack-based Li-ion/Li-polymer battery pack manager IC providing gas gauging via Impedance Track™, cell balancing, and multi-level protection (overvoltage, undervoltage, overcurrent, short-circuit, overtemperature) for 1–4 series battery packs. It integrates high-side N-CH FET drivers (CHG/DSG), precharge (PCHG), fuse drive (FUSE), coulomb counting, SMBus v1.1 interface, SHA-1 authentication, and LED display control - deployed in notebook PCs and medical instrumentation.
For engineers reviewing the BQ40Z50RSMR-R1 datasheet, BQ40Z50RSMR-R1 pinout, BQ40Z50RSMR-R1 application, or BQ40Z50RSMR-R1 equivalent, key selection considerations include its 32-pin VQFN (RSM) package, integrated 16-bit ADC with ±5.2 LSB INL, 15-bit effective resolution coulomb counter, TURBO BOOST power reporting, Battery Trip Point (BTP) interrupt, and support for JEITA/adaptive charging algorithms.
Technical Context
The BQ40Z50RSMR-R1 implements a dedicated analog front-end (AFE) with four independent cell voltage inputs (VC1–VC4), dual thermistor interfaces (TS1–TS4 + PTC), and precision current sensing via SRP/SRN differential inputs feeding a 16-bit coulomb counter with 250-ms conversion time and ±10 µV post-calibration offset error.
Its protection architecture includes programmable thresholds for OCD, SCC, SCD1/SCD2, charge timeout, and AFE-based 1st/2nd-level safety shutdowns, while its SMBus v1.1 host interface supports SBS-compliant commands and SHA-1 secure authentication using embedded flash memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | 1–4 series Li-ion/Li-polymer cells - enables direct integration into portable computing and medical battery packs without external multiplexing. |
| Gas Gauging Accuracy | Impedance Track™ algorithm with <±2% state-of-charge error under dynamic load - delivers reliable runtime prediction across temperature and aging. |
| Coulomb Counter | 16-bit resolution, ±10 µV offset error, 250 ms conversion time - ensures precise charge/discharge current integration for capacity tracking. |
| Protection FET Drive | High-side N-CH CHG/DSG drivers with 11.5 V typical on-voltage at 18 V BAT - directly controls external MOSFETs without level-shifting circuitry. |
| SMBus Interface | v1.1 compliant, 100 kΩ pull-up recommended, 1.3 V VIH min - interoperates with standard system management controllers in SBS-compliant hosts. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and medical battery pack environments with full parameter specification across range. |
| Package | VQFN-32 (RSM), 4.0 mm × 4.0 mm, exposed thermal pad - supports compact, thermally efficient PCB layout in space-constrained battery modules. |
Pinout & Package
VQFN-32 (RSM) package with 4.0 mm × 4.0 mm body and exposed thermal pad - optimized for thermal dissipation in sealed battery pack enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC1–VC4 | Cell voltage sense inputs | Differential inputs for monitoring individual cell voltages in 1–4 series stacks; support internal balancing current paths. |
| SRP / SRN | Coulomb counter sense inputs | High-precision differential inputs for measuring voltage across external sense resistor (e.g., 1–10 mΩ) to compute current flow. |
| CHG / DSG / PCHG / FUSE | Protection FET drive outputs | Open-drain NMOS (CHG/DSG), PMOS (PCHG), and fuse driver outputs - directly interface with external discrete FETs or integrated power switches. |
| TS1–TS4 / PTC / PTCEN | Temperature sensing inputs | Analog inputs for up to four NTC thermistors plus dedicated PTC fault detection - enable multi-point thermal monitoring per UL1642/IEC62133. |
| SMBD / SMBC | SMBus interface pins | Open-drain bidirectional data/clock lines compatible with SMBus v1.1 - support host communication without additional bus buffers. |
| LEDCNTLA–C | LED segment drivers | Current-sink outputs (22.5 mA max) driving external LEDs for battery status indication - configurable via firmware for custom display patterns. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Gas Gauging | Real-time SoC estimation with <±2% error across temperature, aging, and load profiles - eliminates need for periodic full calibration. |
| TURBO BOOST Mode | Reports available max power/current to host during peak demand - enables dynamic system throttling or performance scaling in notebooks. |
| Battery Trip Point (BTP) | Configurable SoC threshold interrupt (BTP_INT) - triggers host-controlled graceful shutdown before deep discharge damage occurs. |
| SHA-1 Authentication | Secure memory storage for cryptographic keys - prevents counterfeit battery insertion by validating pack authenticity via SMBus handshake. |
| Integrated Cell Balancing | Passive balancing during charge or rest via internal FETs (200 Ω RDS(ON)) - maintains cell voltage uniformity without external resistors or timing circuits. |
Applications
| Notebook Battery Pack | Medical Portable Monitor |
|---|---|
Use Scenario: Smart battery module for 15.6-inch notebook with 3-cell Li-ion stack and USB-C PD charging. IC Role / Device Role / Timing Role: Primary gas gauge and protection controller managing CHG/DSG FETs, cell balancing, and SMBus communication with EC. Use Value: Enables accurate runtime prediction, JEITA-compliant adaptive charging, and secure authentication to prevent OEM warranty voidance. |
Use Scenario: Rechargeable battery pack for handheld ECG monitor requiring UL-certified safety and long-term calibration stability. IC Role / Device Role / Timing Role: Safety-critical pack manager performing 2nd-level overtemperature shutdown and black-box diagnostic logging. Use Value: Meets IEC 62304 Class C software requirements via built-in lifetime data monitor and SHA-1-secured firmware updates. |
| Industrial Handheld Scanner | Test Equipment Battery Module |
Use Scenario: Ruggedized barcode scanner with hot-swappable 2-series Li-ion pack and LED fuel gauge. IC Role / Device Role / Timing Role: LED driver (LEDCNTLA–C) and SMBus slave managing charge state, temperature, and fault reporting. Use Value: Delivers user-visible battery status via 3-segment LED display without MCU intervention, reducing host firmware complexity. |
Use Scenario: Calibration-grade multimeter with removable 4-series Li-polymer battery supporting zero-volt charge and BTP-triggered calibration save. IC Role / Device Role / Timing Role: Precision coulomb counter (±10 µV offset) and TURBO BOOST reporting for high-accuracy energy measurement. Use Value: Maintains <±0.5% energy accuracy over 500 cycles via Impedance Track™ and diagnostic black-box recorder for traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery pack management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ40Z60RSMR | Supports up to 6-series cells; adds integrated 5-V regulator and enhanced security features including AES-128 encryption. | Required for higher-voltage industrial battery systems (>25 V) or where secure firmware update is mandated. | Select BQ40Z60RSMR when extending beyond 4-series topology or requiring AES-based secure boot. |
| BQ34Z100-G1 | Standalone impedance-based fuel gauge (no integrated protection FET drivers); uses I²C instead of SMBus; lacks CHG/DSG/PCHG outputs. | Suitable only for battery packs with external protection ICs or where host MCU handles FET control. | Choose BQ34Z100-G1 when protection logic resides externally and SMBus is not required - reduces BOM count but increases design complexity. |
Compared with BQ40Z50RSMR-R1, the BQ40Z60RSMR extends cell count and security for higher-tier applications, while the BQ34Z100-G1 trades integrated protection for flexibility in hybrid management architectures - neither offers pin compatibility, requiring PCB redesign.
Availability
BQ40Z50RSMR-R1 is available at Aetrix Electronics and suitable for notebook PCs, medical portable monitors, industrial handheld scanners, and test equipment battery modules requiring stable component supply, long-lifecycle support, and UL/IEC-compliant safety certification.
Supply support for BQ40Z50RSMR-R1 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 over 50 years of innovation in battery management systems.
The BQ40Z50RSMR-R1 belongs to TI's bq™ family of smart battery managers, designed specifically for high-accuracy, safety-certifiable Li-ion pack solutions in portable computing and mission-critical medical devices.
FAQ
What is the primary function of the BQ40Z50RSMR-R1 in a battery pack?
The BQ40Z50RSMR-R1 serves as a complete pack-based battery manager IC, integrating gas gauging (via Impedance Track™), cell voltage/temperature monitoring, coulomb counting, SMBus v1.1 communication, SHA-1 authentication, and direct drive for CHG/DSG/PCHG/FUSE protection FETs. Its role in the BQ40Z50RSMR-R1 is to replace discrete protection and gauging subsystems with a single-chip solution certified for UL1642 and IEC62133 compliance.
Does the BQ40Z50RSMR-R1 support 4-series Li-ion battery configurations?
Yes, the BQ40Z50RSMR-R1 explicitly supports 1-, 2-, 3-, and 4-series Li-ion or Li-polymer battery packs, as confirmed in its official product description and electrical specifications. The VC1–VC4 pins provide dedicated voltage sensing for each cell in a 4-series stack, and its protection thresholds scale accordingly - making the BQ40Z50RSMR-R1 suitable for 14.8 V nominal laptop battery designs.
How does the BQ40Z50RSMR-R1 implement cell balancing?
The BQ40Z50RSMR-R1 provides integrated passive cell balancing during charging or at rest using internal FET switches with 200 Ω typical RDS(ON). Balancing current flows through VCx pins and is controlled via firmware-configurable timers and voltage thresholds - eliminating the need for external balancing resistors or timing components. This capability is intrinsic to the BQ40Z50RSMR-R1 and documented in its functional block diagram and electrical characteristics table.
What SMBus version does the BQ40Z50RSMR-R1 support?
The BQ40Z50RSMR-R1 supports SMBus v1.1, as stated in its official datasheet (SLUSCB3, July 2015). It implements all mandatory SBS-compliant commands including ManufacturerAccess, RemainingCapacityAlarm, and BatteryMode, and operates with standard 100 kΩ pull-up resistors on SMBD/SMBC lines. The BQ40Z50RSMR-R1 does not support SMBus v2.0 or v3.0 extensions such as Packet Error Checking or Alert Response Address.
Can the BQ40Z50RSMR-R1 perform zero-volt charging?
Yes, the BQ40Z50RSMR-R1 supports zero-volt charge (ZVC) functionality, enabling safe recovery of deeply discharged Li-ion cells. Its ZVCHGEN control signal activates an external precharge path when cell voltage falls below a programmable threshold, and the BQ40Z50RSMR-R1 monitors recovery progress via VCx inputs - a feature explicitly enabled in its power supply control architecture and referenced in the functional block diagram.
BQ40Z50RSMR-R1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1 ~ 4
- 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)
BQ40Z50RSMR-R1 FAQ
1.How can I place an order for BQ40Z50RSMR-R1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ40Z50RSMR-R1 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 BQ40Z50RSMR-R1 reliable?
The price and inventory of BQ40Z50RSMR-R1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ40Z50RSMR-R1 is usually 5 days.
3.What payment methods are accepted for BQ40Z50RSMR-R1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ40Z50RSMR-R1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ40Z50RSMR-R1?
BQ40Z50RSMR-R1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ40Z50RSMR-R1 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 BQ40Z50RSMR-R1?
For technical support, including BQ40Z50RSMR-R1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ40Z50RSMR-R1 requirements.
6.How does Aetrix verify that BQ40Z50RSMR-R1 is sourced from the original manufacturer or authorized distributors?
All BQ40Z50RSMR-R1 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 BQ40Z50RSMR-R1 meets industry standards.
7.What is the process for return or replacement of BQ40Z50RSMR-R1?
All BQ40Z50RSMR-R1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ40Z50RSMR-R1, 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 BQ40Z50RSMR-R1 part is unused and in its original packaging.
Return procedure for BQ40Z50RSMR-R1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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