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Texas Instruments BQ77307RGRR
- Part No.:
- BQ77307RGRR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
BQ77307RGRR.pdf
- Description:
- LOW-POWER PROTECTOR FOR 2S TO 7S
- Quantity:
- Payment:
- Shipping:
Inventory:2,745
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Product details
Overview
BQ77307RGRR from Texas Instruments is a high-accuracy, autonomous battery protector IC for 2- to 7-series Li-ion, Li-polymer, LiFePO₄ (LFP), and LTO battery packs. It provides primary voltage (±4 mV accuracy), current (SCD/OCD1/OCC detection), and temperature protection with integrated low-side NFET drivers, 400-kHz I²C interface, and programmable 3.3-V REGOUT LDO - deployed in cordless power tools and industrial battery systems.
For engineers reviewing the BQ77307RGRR datasheet, BQ77307RGRR pinout, BQ77307RGRR application, or BQ77307RGRR equivalent, key selection considerations include its 20-pin QFN RGR package, ±4-mV cell voltage sensing accuracy, autonomous recovery capability, 8-μA NORMAL-mode supply current, and support for external NTC thermistor-based over/undertemperature protection across charge and discharge paths.
Technical Context
The BQ77307RGRR implements a dedicated analog protection subsystem with independent voltage reference circuits (VREF1 for cell/thermistor thresholds, VREF2 for LDO/current detection), dual-path current sensing (SRP/SRN) with 10 programmable threshold settings per direction, and hardware-based thermal protection including internal die overtemperature detection. Its architecture supports both standalone operation and host-controlled configuration via I²C.
It integrates two NMOS gate drivers (CHG and DSG) with high-voltage tolerance (up to 45 V on BAT/VCx pins), operates from 3 V to 38.5 V supply, and features wake-on-VC0/TS functionality for ultra-low-power SHUTDOWN mode (<1 μA). The device uses OTP memory programmed by TI for immutable configuration storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell count support | 2-series to 7-series Li-ion/LiPo/LFP/LTO stacks - enables flexible pack design without redesigning protection circuitry |
| Cell voltage accuracy | ±4 mV over –40°C to +110°C - ensures reliable COV/CUV trip points across automotive and industrial temperature ranges |
| Current detection range | OCD1/OCD2: 4–200 mV (2-mV steps); OCC: 3–123 mV (2-mV steps); SCD: 10–500 mV - supports wide-range sense resistor selection (e.g., 1–10 mΩ) |
| I²C interface | Up to 400 kHz with optional CRC - enables robust host communication for real-time status readback and configuration updates |
| Supply current | NORMAL mode: 8 μA (FETs enabled); SHUTDOWN: <1 μA - extends shelf life and standby runtime in battery-powered equipment |
| REGOUT LDO | Programmable 1.8 V / 2.5 V / 3.0 V / 3.3 V / 5.0 V output, 20-mA capable - powers external MCU or sensors without auxiliary regulator |
| Package | 20-pin QFN (RGR), 3.5 mm × 3.5 mm × 0.9 mm, 0.5-mm pitch - compact footprint compatible with high-density PCB layouts |
Pinout & Package
20-pin QFN package (RGR), 3.5 mm × 3.5 mm × 0.9 mm, 0.5-mm pitch, exposed thermal pad. Pin 1 marked by dot; top-side marking includes TI logo and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC7 | Cell voltage sense inputs | Direct connection to cell stack nodes; VC0 serves as reference and wakeup source; VC1–VC7 support up to 7 cells |
| SRP / SRN | Current sense differential inputs | Measure voltage drop across external sense resistor; polarity determines charge/discharge current direction detection |
| TS | NTC thermistor input | Connects to external NTC network; enables OTC/OTD/UTC/UTD protection and wakeup from SHUTDOWN |
| CHG / DSG | Low-side NMOS gate drivers | Drive external N-channel FETs for charge and discharge path control; tolerate >40 V drain-source voltage |
| SCL / SDA | I²C bidirectional bus | Support standard/fast-mode I²C (100/400 kHz); open-drain outputs with internal pull-up capability |
| ALERT | Interrupt output | Active-low push-pull signal indicating protection event or status change; configurable via I²C register |
| REGOUT | Programmable LDO output | Configurable voltage rail (1.8–5.0 V) for powering external circuitry; stable under 20-mA load |
| BAT / REGSRC | Main supply inputs | BAT powers internal circuitry; REGSRC supplies CHG/DSG drivers and REGOUT LDO - both rated to 45 V |
| VSS | Ground reference | Primary analog/digital ground; connects to exposed thermal pad for optimal thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous recovery | Automatic reset of protection faults (e.g., COV/CUV) after condition clears - eliminates need for host intervention or power cycle |
| Integrated protection drivers | Dual low-side NMOS drivers (CHG/DSG) with 45-V tolerance - reduces BOM count and layout complexity vs discrete FET solutions |
| High-accuracy references | VREF1 (±29 ppm/°C drift) for cell/thermistor thresholds; VREF2 (±52 ppm/°C) for current detection - maintains precision across temperature |
| Ultra-low-power modes | SHUTDOWN mode draws <1 μA; NORMAL mode draws only 5–8 μA - critical for long-term storage and maintenance-free operation |
| OTP-configured settings | Factory-programmed protection thresholds and behavior stored in one-time-programmable memory - ensures consistent, tamper-resistant configuration |
Applications
| Cordless Power Tools | Vacuum Cleaners |
|---|---|
Use Scenario: High-current, multi-cell battery packs powering brushless motors with rapid charge/discharge cycles and thermal stress during extended runtime. IC Role / Device Role / Timing Role: Primary protector monitoring individual cell voltages, pack current, and NTC temperature - triggers CHG/DSG FET shutdown within microseconds of fault detection. Use Value: Prevents cell imbalance, thermal runaway, and overdischarge during aggressive motor loads while enabling fast recovery between tool bursts. | Use Scenario: Portable vacuum with 4–6 series Li-ion cells requiring sustained high-power suction and frequent recharging in consumer environments. IC Role / Device Role / Timing Role: Autonomous voltage/current/temperature supervisor with interrupt-driven host notification - manages protection events without continuous MCU polling. Use Value: Extends battery cycle life and user safety by enforcing precise COV (4.35 V), CUV (2.5 V), and OTD (65°C) limits during variable-load operation. |
| Non-Military Drones | Industrial Battery Packs |
Use Scenario: Compact UAV battery packs subject to vibration, wide ambient temperature swings, and strict weight/power density constraints. IC Role / Device Role / Timing Role: Standalone protector with wake-on-VC0/TS and low-quiescent-current operation - maintains readiness during flight standby without draining reserve capacity. Use Value: Enables reliable cold-start at –20°C and prevents in-flight overtemperature shutdown via accurate NTC-based UTC/OTC thresholds. | Use Scenario: Rechargeable energy storage systems for material handling equipment, AGVs, or portable test instruments with 2–7 series configurations. IC Role / Device Role / Timing Role: Configurable protector supporting multiple chemistries (Li-ion, LFP, LTO) via OTP programming - simplifies platform reuse across product lines. Use Value: Reduces qualification effort by allowing single hardware design to serve diverse battery architectures through software-selectable thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ77306RGRR | Supports up to 6-series cells; REGOUT fixed at 3.3 V; no VC7 pin | Limited to ≤6-cell packs; lacks seventh cell monitoring capability | Select when pack topology is strictly 2–6 series and 3.3-V REGOUT suffices |
| BQ77316RGRR | Supports up to 16-series cells; higher voltage rating (65 V); different pinout and OTP structure | Targeted at EV traction, ESS, and high-voltage industrial packs - not drop-in compatible | Choose for >7-cell systems requiring extended voltage range and scalability |
Compared with BQ77306RGRR, the BQ77307RGRR adds seventh-cell monitoring and programmable REGOUT voltage, making it suitable for next-generation 7S power tools. Versus BQ77316RGRR, it offers lower cost and smaller footprint for mid-voltage applications but lacks high-series scalability.
Availability
BQ77307RGRR is available at Aetrix Electronics and suitable for cordless power tools, vacuum cleaners, non-military drones, and industrial battery packs requiring stable component supply, long-lifecycle support, and guaranteed authenticity.
Supply support for BQ77307RGRR 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 expertise in battery management systems and industrial-grade IC design.
The BQ77307RGRR belongs to TI's BQ773xx family of high-accuracy, autonomous battery protectors - engineered specifically for cost-sensitive, high-reliability 2–7S industrial and professional power equipment.
FAQ
What is the maximum supported cell count for the BQ77307RGRR?
The BQ77307RGRR supports battery packs with 2 to 7 series-connected cells. This is confirmed by TI's official documentation, which specifies VC0 through VC7 pins - where VC0 serves as the bottom reference and VC1–VC7 monitor individual cell voltages up to the seventh cell. The device's internal protection logic and OTP configuration are validated for this full 2S–7S range.
Does the BQ77307RGRR support autonomous recovery after a protection event?
Yes, the BQ77307RGRR supports autonomous recovery for voltage and temperature protection events. After a fault such as cell overvoltage (COV) or overtemperature in discharge (OTD) clears, the device automatically resets the associated FET driver (DSG or CHG) without requiring host intervention or power cycling - a feature explicitly enabled via OTP configuration and verified in TI's functional description.
What is the accuracy of cell voltage measurement in the BQ77307RGRR?
The BQ77307RGRR achieves ±4 mV cell voltage measurement accuracy over the full operating temperature range of –40°C to +110°C. This specification applies to both cell overvoltage (COV) and cell undervoltage (CUV) detection thresholds and is directly stated in the "Voltage protection" section of TI's official datasheet for the BQ77307RGRR.
Can the BQ77307RGRR drive external MOSFETs directly?
Yes, the BQ77307RGRR integrates two dedicated low-side NMOS gate drivers - CHG for the charge FET and DSG for the discharge FET - capable of directly driving external N-channel MOSFETs. Both outputs tolerate up to 45 V, support fast turn-on/turn-off, and are designed to operate without external level-shifting components in typical battery pack configurations.
Is the REGOUT LDO voltage programmable on the BQ77307RGRR?
Yes, the REGOUT LDO output voltage on the BQ77307RGRR is factory-programmable via OTP memory to 1.8 V, 2.5 V, 3.0 V, 3.3 V, or 5.0 V. TI pre-programs this setting before shipment; it cannot be modified in the field. The selected voltage is fixed for the lifetime of the BQ77307RGRR device and is specified in the orderable part number's configuration table.
BQ77307RGRR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 2 ~ 7
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (3.5x3.5)
BQ77307RGRR FAQ
1.How can I place an order for BQ77307RGRR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ77307RGRR 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 BQ77307RGRR reliable?
The price and inventory of BQ77307RGRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ77307RGRR is usually 5 days.
3.What payment methods are accepted for BQ77307RGRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ77307RGRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ77307RGRR?
BQ77307RGRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ77307RGRR 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 BQ77307RGRR?
For technical support, including BQ77307RGRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ77307RGRR requirements.
6.How does Aetrix verify that BQ77307RGRR is sourced from the original manufacturer or authorized distributors?
All BQ77307RGRR 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 BQ77307RGRR meets industry standards.
7.What is the process for return or replacement of BQ77307RGRR?
All BQ77307RGRR units undergo pre-shipment inspection (PSI). If there is an issue with BQ77307RGRR, 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 BQ77307RGRR part is unused and in its original packaging.
Return procedure for BQ77307RGRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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