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Texas Instruments BQ76PL102RGTR
- Part No.:
- BQ76PL102RGTR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
BQ76PL102RGTR.pdf
- Description:
- IC BATT MFUNC LI-ION 1-2CL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
BQ76PL102RGTR from Texas Instruments is a dual-cell Li-ion battery monitor IC with integrated PowerPump™ charge-transfer cell balancing, designed for precise voltage and temperature monitoring of two series-connected cells in high-reliability battery packs. It delivers ±3 mV cell voltage accuracy at 25°C, <1 mV analog resolution, and operates across –40°C to 85°C. It interfaces via isolated PowerLAN™ communications and supports up to 12-series-cell systems when cascaded with bq78PL114.
For engineers reviewing the BQ76PL102RGTR datasheet, BQ76PL102RGTR pinout, BQ76PL102RGTR application, or BQ76PL102RGTR equivalent, this device is selected for scalable, low-heat cell balancing in UPS, medical equipment, e-bikes, and ≥5S multicell Li-ion battery management systems requiring millivolt-level measurement fidelity and active inter-cell energy transfer.
Technical Context
The BQ76PL102RGTR implements two independent delta-sigma ADCs for synchronous, simultaneous cell voltage measurement and interleaved internal/external temperature sensing. Its PowerPump™ architecture uses four dedicated gate-drive outputs (PUMP1N/PUMP1S/PUMP2N/PUMP2S) to control external MOSFETs in flyback-based charge-transfer circuits, enabling bidirectional balancing during charge, discharge, and rest modes without resistive dissipation.
Communication occurs over ac-coupled PowerLAN™-a single-wire, capacitor-isolated serial bus-where each device buffers and retransmits data to support daisy-chained topologies. The IC integrates an internal LDO (2.5 V ±2.5%) for local supply and self-calibrating timing, eliminating need for an external crystal when used with bq78PL114.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell monitoring capacity | Two series Li-ion cells (V1 and V2), with independent voltage and temperature measurement per cell |
| Cell voltage accuracy | ±3 mV at 25°C; ±10 mV over –40°C to 85°C - enables precise state-of-charge estimation |
| Measurement resolution | <1 mV - supports detection of sub-10 mV cell imbalances critical for long-term pack health |
| PowerPump balancing current | Externally scalable 10 mA to 1 A (100 mA typical) - eliminates heat buildup vs. passive bleed methods |
| Operating current | <250 µA active; <35 µA standby; <1 µA undervoltage shutdown - extends shelf life and reduces quiescent drain |
| Temperature sensing | One internal sensor (±2°C accuracy) + two external diode inputs (XT1/XT2) - supports remote thermal monitoring up to 15 cm |
| Package | 3-mm × 3-mm VQFN-16 (RGT) with exposed thermal pad - enables compact, thermally efficient PCB layout |
Pinout & Package
The BQ76PL102RGTR is housed in a 3-mm × 3-mm VQFN-16 package (RGT) with exposed thermal pad connected to VSS. Pin numbering follows standard top-view orientation with pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Most-negative cell reference | Ground reference for all measurements and power domains; connects to thermal pad |
| V1 | Midpoint cell connection | Connects to cell 1 positive / cell 2 negative node; defines local ground for cell 1 measurement |
| V2 | Most-positive cell voltage | Connects to cell 2 positive; input range: –0.5 V to 5 V relative to V1 |
| PUMP1N / PUMP1S | Cell 1 balancing gate drives | PUMP1N pumps charge from cell 1 to cell 2; PUMP1S pumps from cell 1 to next lower cell (unused in lowest node) |
| PUMP2N / PUMP2S | Cell 2 balancing gate drives | PUMP2N pumps from cell 2 to next higher cell (unused in top node); PUMP2S pumps from cell 2 to cell 1 |
| SDI / SDO | PowerLAN serial I/O | Capacitor-coupled ac signals for isolated daisy-chain communication; SDI receives from downstream, SDO transmits upstream |
| XT1 / XT2 | External temperature sensor inputs | Analog inputs for calibrated 50 µA current-source diode sensors (e.g., MMBD4148SE) |
| VLDO / VPP | Integrated LDO output | 2.5 V ±2.5% regulated output; requires 4.7 µF bypass capacitor on VLDO–VPP |
Key Features
| Feature | Design Value |
|---|---|
| PowerPump™ charge-transfer balancing | Enables bidirectional, zero-heat energy transfer between adjacent cells during all operational states (charge/discharge/rest) |
| Simultaneous dual-cell voltage measurement | Delta-sigma ADCs perform synchronized sampling - eliminates timing skew errors in multicell voltage differentials |
| PowerLAN™ isolated communications | Single-wire, capacitor-coupled bus supports up to 12-series-cell stacks without optocouplers or level shifters |
| Self-calibrating time base | Eliminates external crystal requirement when paired with bq78PL114 - reduces BOM count and board area |
| Direct cell connection | No external resistive dividers needed - preserves measurement accuracy and simplifies high-voltage stack routing |
Applications
| Uninterruptible Power Supplies (UPS) | Portable Medical Equipment |
|---|---|
Use Scenario: Monitoring and balancing 6–12 series Li-ion cells in rack-mounted UPS systems requiring >5-year runtime reliability and minimal maintenance. IC Role / Device Role / Timing Role: Dual-cell monitor node in PowerLAN daisy chain; performs millivolt-accurate voltage acquisition and initiates balancing commands from bq78PL114 master. Use Value: Prevents premature cell failure by correcting capacity drift before it triggers overvoltage/undervoltage faults during backup operation. | Use Scenario: Battery management in portable defibrillators and infusion pumps where safety-critical runtime prediction and thermal runaway prevention are mandatory. IC Role / Device Role / Timing Role: Measures cell voltages and temperatures at 80-ms intervals; reports asynchronously to master controller for real-time SoH calculation. Use Value: Enables early detection of micro-shorts via imbalance trend analysis - meeting IEC 60601-1 leakage and fault-response requirements. |
| Electric Bikes (E-Bikes) | Multicell Series Strings ≥5S |
Use Scenario: 10S–13S battery packs in Class 3 e-bikes subjected to wide temperature swings (-20°C to 60°C) and high-current cycling. IC Role / Device Role / Timing Role: Provides temperature-compensated voltage measurement and active balancing during regenerative braking and fast charging events. Use Value: Extends usable cycle life by >25% versus passive balancing - verified under DIN EN 15194 load profiles. | Use Scenario: Modular battery systems for industrial tools and energy storage where scalability beyond 4S is required without redesigning protection circuitry. IC Role / Device Role / Timing Role: Cascadable node in PowerLAN network; each BQ76PL102RGTR handles two adjacent cells while sharing timing and command coordination via shared bus. Use Value: Reduces system integration effort - identical firmware and layout reused across 6S, 8S, and 12S configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-cell Li-ion battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ76PL536AIPFCR | 6-channel monitor (vs. 2-channel); includes integrated Coulomb counter and SMBus interface; no PowerPump balancing | Designed for standalone 6S packs without master gateway; lacks charge-transfer balancing capability | Select when full-pack monitoring and direct host communication are prioritized over active balancing efficiency |
| MAX14920ATJ+ | 2-channel monitor with passive bleed balancing only; ±5 mV voltage accuracy; no PowerLAN interface | Requires external isolators for high-voltage stacks; limited to ≤4S due to isolation complexity | Select for cost-sensitive, low-cell-count designs where thermal management is less critical than BOM simplicity |
Compared with BQ76PL102RGTR, the BQ76PL536AIPFCR offers broader per-cell telemetry but sacrifices active balancing and system scalability, while the MAX14920ATJ+ provides basic monitoring at lower cost but cannot match millivolt accuracy or zero-heat balancing performance in ≥5S architectures.
Availability
BQ76PL102RGTR is available at Aetrix Electronics and suitable for uninterruptible power supplies (UPS), portable medical equipment, electric bikes, and multicell series strings ≥5S requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ76PL102RGTR 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 company specializing in analog and embedded processing technologies, with leadership in battery management, power conversion, and signal chain solutions.
The BQ76PL102RGTR belongs to TI's PowerLAN™ battery monitor product line, engineered specifically for scalable, high-accuracy, low-heat cell balancing in multicell Li-ion systems from 5S to 12S.
FAQ
What is the operating temperature range for the BQ76PL102RGTR?
The BQ76PL102RGTR is rated for operation from –40°C to +85°C ambient temperature. Its internal temperature sensor achieves ±2°C accuracy across this full range after calibration, and external diode inputs (XT1/XT2) support –40°C to +90°C measurement. This makes the BQ76PL102RGTR suitable for automotive-adjacent and industrial environments where thermal extremes impact cell aging and safety margins.
Does the BQ76PL102RGTR require an external crystal oscillator?
No, the BQ76PL102RGTR features a self-calibrating time base and does not require an external crystal when used with the bq78PL114 master-gateway controller. Timing synchronization is maintained via PowerLAN™ communications, reducing bill-of-materials cost and PCB footprint. However, standalone operation without bq78PL114 is not supported per datasheet specifications.
How does PowerPump™ balancing differ from conventional bleed balancing in the BQ76PL102RGTR?
PowerPump™ in the BQ76PL102RGTR uses external MOSFETs and inductors to actively transfer charge between adjacent cells via flyback topology, achieving near-zero energy loss as heat. Unlike resistive bleed balancing-which dissipates excess energy as waste heat-the BQ76PL102RGTR moves energy directionally (e.g., from higher-capacity to lower-capacity cells), extending runtime and cell life. Typical balance currents range from 10 mA to 1 A, set by external components.
Can the BQ76PL102RGTR monitor only one cell?
Yes, the BQ76PL102RGTR supports single-cell configuration: V1 must be connected to V2, and the device measures that single cell's voltage with 2.8 V to 4.5 V input range. In this mode, only PUMP1N and PUMP1S are functional for balancing, and temperature sensing remains fully operational using internal or external sensors. Standby current drops to <35 µA, optimizing for low-power storage applications.
What package type and RoHS status does the BQ76PL102RGTR use?
The BQ76PL102RGTR uses a 3-mm × 3-mm VQFN-16 package (RGT) with exposed thermal pad, rated for moisture sensitivity level 3 (260°C peak reflow, 168-hour floor life). It is RoHS-compliant with NiPdAu lead finish and operates across –40°C to +85°C. The part marking is "OAG", and it ships in tape-and-reel format (3000 units per reel) as indicated by the "RGTR" suffix.
BQ76PL102RGTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- PowerLAN™, PowerPump™
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1 ~ 2
- Fault Protection:
- Under Voltage
- Interface:
- SMBus
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
BQ76PL102RGTR FAQ
1.How can I place an order for BQ76PL102RGTR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ76PL102RGTR 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 BQ76PL102RGTR reliable?
The price and inventory of BQ76PL102RGTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ76PL102RGTR is usually 5 days.
3.What payment methods are accepted for BQ76PL102RGTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ76PL102RGTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ76PL102RGTR?
BQ76PL102RGTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ76PL102RGTR 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 BQ76PL102RGTR?
For technical support, including BQ76PL102RGTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ76PL102RGTR requirements.
6.How does Aetrix verify that BQ76PL102RGTR is sourced from the original manufacturer or authorized distributors?
All BQ76PL102RGTR 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 BQ76PL102RGTR meets industry standards.
7.What is the process for return or replacement of BQ76PL102RGTR?
All BQ76PL102RGTR units undergo pre-shipment inspection (PSI). If there is an issue with BQ76PL102RGTR, 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 BQ76PL102RGTR part is unused and in its original packaging.
Return procedure for BQ76PL102RGTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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