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Texas Instruments BQ7692000PW
- Part No.:
- BQ7692000PW
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7692000PW.pdf
- Description:
- IC BATT MON MULTI 3-5C 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,127
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Product details
Overview
BQ7692000PW from Texas Instruments is a 3- to 5-series Li-ion and LiFePO₄ battery monitor IC with integrated cell balancing FETs, low-side charge/discharge FET drivers, and dual ADCs for cell voltage (±15 mV accuracy at 25°C), pack current (±40 LSB INL), and temperature sensing. It supports up to three thermistors (103AT), delivers 2.5-V LDO output, and operates across –40°C to +85°C for e-bike battery packs.
For engineers reviewing the BQ7692000PW datasheet, BQ7692000PW pinout, BQ7692000PW application, or BQ7692000PW equivalent, key selection criteria include its 20-pin TSSOP package, I²C interface with CRC option, 70-mA internal cell balancing current, random cell connection tolerance, and hardware-based overvoltage/undervoltage/overcurrent protection with programmable delay timers.
Technical Context
The BQ7692000PW implements a dual-ADC architecture: one 14-bit ADC for cell voltage and die/thermistor temperature measurement (382 µV LSB), and a separate 16-bit coulomb counter ADC for pack current (8.44 µV LSB, ±200 mV input range). Its protection logic executes independently of host communication using dedicated comparators and configurable thresholds stored in registers.
It features autonomous hardware protection including overvoltage (OV), undervoltage (UV), overcurrent in discharge (OCD), and short-circuit in discharge (SCD), each with user-selectable delay options (e.g., OV delay: 1/2/4/8 s) and threshold resolution (16-LSB steps). The device enters ultra-low-power SHIP mode (<1.8 µA) and supports boot via TS1 push-button.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 3–5 series Li-ion/LiFePO₄ cells; enables compact 18-V battery packs without external multiplexing |
| Cell Voltage Accuracy | ±15 mV (25°C, 3.2–4.6 V range); ensures precise state-of-charge estimation within 1% error band |
| Current Sensing | 16-bit coulomb counter with ±200 mV input range and ±40 LSB INL; supports 10-mΩ sense resistors for ±20-A full-scale measurement |
| Cell Balancing Current | 70 mA per cell (internal FET); allows active balancing without external components for improved pack longevity |
| Supply Current (Normal Mode) | 130–195 µA (ADC + coulomb counter enabled); enables multi-year operation on backup batteries |
| I²C Interface | Standard-mode compatible (100 kHz), with optional CRC; simplifies host MCU integration without custom protocol stacks |
| Operating Temperature | –40°C to +85°C; qualified for industrial and light electric vehicle environments |
Pinout & Package
Package: 20-pin TSSOP (PW), 6.50 mm × 4.40 mm × 1.20 mm body size, lead pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DSG | Discharge FET driver output | Drives external N-channel MOSFET gate; 10–14 V output swing supports standard logic-level FETs |
| CHG | Charge FET driver output | Drives external N-channel MOSFET gate; same voltage swing as DSG for symmetric protection control |
| VSS | Chip ground reference | Primary return path for all analog and digital circuitry; must be low-impedance connection to pack negative |
| SDA / SCL | I²C bidirectional data / clock | Host communication interface; supports standard pull-up configuration; CRC option enhances data integrity |
| TS1 | Thermistor #1 input | Accepts 10-kΩ 103AT thermistor; internal bias enables direct analog temperature readout without external circuitry |
| CAP1 | Cell voltage filter capacitor terminal | Connects to 0.1-µF ceramic capacitor for noise suppression on VC0–VC5 inputs |
| REGOUT | 2.5-V LDO output | Provides regulated supply for external microcontroller or sensors; 4.7-µF load capacitance required for stability |
| REGSRC | LDO input source | Takes 6–25 V from pack or auxiliary rail; powers internal LDO and digital core independently of BAT |
| BAT | Top-cell positive terminal | High-voltage input (up to 36 V); connects to highest-potential cell in stack for accurate voltage referencing |
| VC0–VC5 | Cell voltage sense inputs | Measure differential voltages across individual cells (VC0 = bottom, VC5 = top); tolerate ±9 V differential |
| SRP / SRN | Current sense inputs | Differential pair measuring voltage across sense resistor; ±200 mV common-mode range supports bidirectional current detection |
| ALERT | Open-drain interrupt output | Asserts on protection events or register flags; double-function as override input during boot sequence |
Key Features
| Feature | Design Value |
|---|---|
| Pure digital interface | Eliminates need for external ADCs or signal conditioning; reduces BOM count and layout complexity |
| Integrated cell balancing FETs | 70-mA per-cell balancing without external switches; enables passive equalization with minimal footprint overhead |
| No EEPROM programming required | Factory-configured I²C address (0x08) and LDO voltage (2.5 V); eliminates production programming step |
| Random cell connection tolerance | Supports non-sequential cell wiring; simplifies mechanical assembly and improves manufacturing yield |
| SHIP mode ultra-low power | 0.6–1.8 µA quiescent current; extends shelf life and enables long-term storage without pack drain |
Applications
| e-Bikes & Pedelecs | Power Tools |
|---|---|
Use Scenario: 36-V, 10.4-Ah lithium battery pack with integrated protection and fuel gauging for Class 1/2 e-bikes. IC Role / Device Role / Timing Role: Primary AFE monitoring cell voltages, pack current, and motor temperature; triggers CHG/DSG FETs on OV/UV/OCD faults within <105 µs (SCD). Use Value: Enables UL 2849-compliant safety architecture with autonomous hardware protection independent of MCU firmware. | Use Scenario: Cordless drill battery pack requiring fast-charge support, runtime optimization, and thermal derating during high-torque operation. IC Role / Device Role / Timing Role: Measures real-time cell imbalance and coulomb count; initiates cell balancing during idle periods and throttles discharge via DSG driver when temperature exceeds 65°C. Use Value: Extends usable cycle life by >20% through precision per-cell voltage control and adaptive thermal management. |
| Battery Backup Units (BBUs) | Industrial 18-V Battery Packs |
Use Scenario: Rack-mounted 48-V UPS system with hot-swappable 18-V modules, requiring seamless failover and state-of-health tracking. IC Role / Device Role / Timing Role: Monitors individual cell health via repeated voltage sampling (250-ms interval); reports degradation trends to host controller via I²C for predictive maintenance. Use Value: Reduces unplanned downtime by detecting weak cells 3–6 months before capacity drop exceeds 15%. | Use Scenario: Sealed industrial battery for AGV navigation systems operating in wide-temperature warehouses (–25°C to +70°C). IC Role / Device Role / Timing Role: Provides calibrated die temperature and thermistor readings (TS1) across –40°C to +85°C; enables accurate SOC compensation in cold ambient conditions. Use Value: Maintains ±3% SOC accuracy down to –20°C, preventing premature shutdown during winter logistics operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7692001PW | I²C address 0x08, 2.5-V LDO, CRC enabled; identical pinout and electrical specs | Same functional scope but includes CRC checksum for enhanced I²C data integrity in noisy environments | Select BQ7692001PW when robust communication in EMI-heavy motor drive zones is required |
| BQ7693000DBT | 30-pin TSSOP, supports 6–10 series cells, 5-mA balancing current, different pin mapping (e.g., TS2, CAP2) | Designed for 36-V packs; not pin-compatible or drop-in; requires PCB redesign and firmware adaptation | Choose BQ7693000DBT only when scaling to higher cell counts and accepting layout/firmware rework |
Compared with BQ7692000PW, BQ7692001PW adds CRC without altering timing or power behavior, while BQ7693000DBT expands cell support at the cost of full hardware and software requalification - making the former a safe upgrade and the latter a platform-level change.
Availability
BQ7692000PW is available at Aetrix Electronics and suitable for e-bike battery packs, cordless power tools, and industrial 18-V battery backup units requiring stable component supply, long-lifecycle assurance, and TI-qualified automotive-grade reliability.
Supply support for BQ7692000PW 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 delivering analog and embedded processing solutions with emphasis on power management, signal chain, and high-reliability industrial products.
The BQ769x0 family targets high-power battery systems including light EVs and portable industrial equipment, with design goals centered on autonomous hardware protection, ultra-low-power operation, and simplified host integration via pure digital interfaces.
FAQ
What is the maximum supported battery voltage for the BQ7692000PW?
The BQ7692000PW supports up to 36 V across the BAT-to-VSS terminals, corresponding to 5-series Li-ion cells (nominal 18 V, absolute max 36 V). This rating is defined in the Absolute Maximum Ratings table and applies under recommended operating conditions - exceeding it risks permanent damage. The BQ7692000PW must not be used in 10S or 15S configurations; those require BQ7693000DBT or BQ7694000DBT respectively.
Does the BQ7692000PW require external EEPROM programming during manufacturing?
No, the BQ7692000PW does not require external EEPROM programming. Texas Instruments preconfigures the device with fixed parameters including I²C address (0x08), LDO output voltage (2.5 V), and CRC setting (disabled), all permanently stored in factory-programmed memory. This eliminates production-line programming steps and ensures consistent behavior across units without firmware intervention.
How many thermistors can the BQ7692000PW interface with simultaneously?
The BQ7692000PW supports one thermistor directly via the TS1 pin. Although the BQ769x0 family documentation states "up to three thermistors" for the broader series, the BQ76920 variant (20-pin TSSOP) only exposes TS1 - TS2 and TS3 are absent in its pinout and electrical specifications. Adding a second thermistor requires external multiplexing or a different variant such as BQ7693000DBT.
What is the cell balancing current capability of the BQ7692000PW?
The BQ7692000PW provides 70 mA of internal cell balancing current per cell, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This value is exclusive to the BQ76920 variant; BQ76930 and BQ76940 deliver only 5 mA per cell due to different FET sizing. The 70-mA capability enables effective passive balancing in 3–5S packs without external components or thermal derating under typical ambient conditions.
Can the BQ7692000PW operate without an external microcontroller?
The BQ7692000PW cannot perform autonomous battery management without a host microcontroller. While it executes hardware protections (OV/UV/OCD/SCD) independently, functions like state-of-charge calculation, cell balancing scheduling, fault logging, and communication rely on I²C commands from an external MCU. The device lacks onboard firmware or decision logic beyond fixed protection thresholds - it serves strictly as an analog front-end, not a standalone BMS controller.
BQ7692000PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 3 ~ 5
- Fault Protection:
- Over Current, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
BQ7692000PW FAQ
1.How can I place an order for BQ7692000PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7692000PW 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 BQ7692000PW reliable?
The price and inventory of BQ7692000PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7692000PW is usually 5 days.
3.What payment methods are accepted for BQ7692000PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7692000PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7692000PW?
BQ7692000PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7692000PW 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 BQ7692000PW?
For technical support, including BQ7692000PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7692000PW requirements.
6.How does Aetrix verify that BQ7692000PW is sourced from the original manufacturer or authorized distributors?
All BQ7692000PW 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 BQ7692000PW meets industry standards.
7.What is the process for return or replacement of BQ7692000PW?
All BQ7692000PW units undergo pre-shipment inspection (PSI). If there is an issue with BQ7692000PW, 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 BQ7692000PW part is unused and in its original packaging.
Return procedure for BQ7692000PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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