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Texas Instruments BQ769142PFBR
- Part No.:
- BQ769142PFBR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
BQ769142PFBR.pdf
- Description:
- 3-S TO 14-S HIGH-ACCURACY BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:1,135
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Product details
Overview
BQ769142PFBR from Texas Instruments is a high-accuracy, 3- to 14-series battery monitor and protector IC for Li-ion, Li-polymer, and LiFePO₄ battery packs. It integrates dual ADCs for simultaneous voltage/current sampling, ±200-mV current-sense range, <10 mV typical cell voltage measurement error, autonomous high-side NFET charge pump drivers, and OTP memory programmable on production line.
For engineers reviewing the BQ769142PFBR datasheet, BQ769142PFBR pinout, BQ769142PFBR application, or BQ769142PFBR equivalent, key selection criteria include its 48-pin TQFP (PFB) package, 85-V high-voltage tolerance on cell-connect pins, 9-µA DEEPSLEEP mode, dual programmable LDOs (REG1/REG2), and support for I²C/SPI/HDQ interfaces in industrial battery pack designs.
Technical Context
The BQ769142PFBR implements a dual-ADC architecture: one dedicated to high-accuracy cell voltage monitoring (±5 mV at 25°C), the other to coulomb counting with <1 µV input offset error. Its integrated charge pump enables direct drive of high-side NFETs without external components, supporting autonomous recovery after overvoltage or overcurrent events.
Protection logic includes configurable primary and secondary thresholds for cell voltage, temperature (via internal sensor + up to nine external thermistors), current, and internal diagnostics. Power management supports four distinct modes-NORMAL (286 µA), SLEEP (24–41 µA), DEEPSLEEP (9–10 µA), and SHUTDOWN (1 µA)-with wake-on-LD or TS2 functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 3- to 14-series Li-ion/LiPo/LiFePO₄ stacks - enables scalable pack design from e-bike (10S) to BBU (14S) |
| Cell Voltage Accuracy | ±5 mV (typ, 25°C) - ensures precise state-of-charge estimation and tight protection window control |
| Coulomb Counter Offset | <1 µV (typ) - minimizes integration drift during long-term current monitoring |
| Current Sense Range | ±200 mV across sense resistor - supports high-current applications up to ~200 A with 1-mΩ shunt |
| Supply Current (DEEPSLEEP) | 9–10 µA - extends shelf life and standby runtime in always-connected industrial packs |
| High-Voltage Tolerance | 85 V on VC0–VC14, PACK, LD - eliminates need for external level-shifting in 48–60 V systems |
| Communication Interfaces | I²C (400 kHz), SPI, HDQ one-wire - provides host flexibility and reduced pin count in space-constrained layouts |
| Operating Temperature | –40°C to +85°C - qualified for industrial and LEV environments without derating |
Pinout & Package
48-pin TQFP package (PFB), 7 mm × 7 mm body size, exposed thermal pad (not electrically connected). Pin functions validated per TI SLUSE91B datasheet Rev B (Jan 2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC14 | Cell voltage sensing & balancing return paths | Direct connection points for 14-cell stack; VC13A/VC13B and VC12A/VC12B must be shorted on PCB for proper balancing current routing |
| SRP / SRN | Coulomb counter analog inputs | Differential inputs for shunt-based current measurement; support ±200-mV full-scale range with <1-µV offset |
| CHG / DSG | NMOS FET gate drivers | Active-low outputs driving external discharge/charge FETs; rated for 85-V absolute max output swing |
| PCHG / PDSG | PFET precharge/predischarge drivers | Charge-pump-assisted high-side PFET control with optional autonomous recovery logic |
| REG1 / REG2 | Programmable LDO outputs | Configurable 1.8/2.5/3.0/3.3/5.0 V outputs for MCU or peripheral power; REGIN supplies both |
| ALERT / SCL / SDA / HDQ | Multi-function I/O | Shared pins support interrupt signaling, I²C, SPI, HDQ, thermistor input, or general-purpose ADC - reduces system pin count |
| RST_SHUT | Digital input | Asynchronous reset or shutdown trigger; pulls device into SHUTDOWN mode when asserted |
| FUSE | Fuse sense & drive | Supports integrated secondary chemical fuse activation and monitoring for redundant overcurrent protection |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous cell balancing | Configurable per-cell balancing current up to 100 mA without host intervention - maintains voltage uniformity during storage or float charge |
| Integrated charge pump | Enables direct high-side NFET drive without external bootstrap circuitry - simplifies layout and improves reliability in 48–60 V packs |
| Dual independent ADCs | Simultaneous voltage and current sampling at 13-bit resolution - eliminates timing skew between SOC and SOH calculations |
| OTP memory | Customer-programmable one-time memory on production line - stores calibration data, protection thresholds, and device-specific configuration |
| Random cell attach tolerance | Robust startup sequence handling - prevents misconfiguration during automated pack assembly with non-sequential cell connection |
| Multi-mode power management | Four low-power states with wake-on-LD or TS2 - enables ultra-low quiescent current in always-on BMS applications |
Applications
| Battery Backup Unit (BBU) | E-bike & E-scooter |
|---|---|
Use Scenario: Continuous monitoring of 12S–14S LiFePO₄ backup banks in telecom or UPS systems with periodic self-test and load-dump detection. IC Role / Device Role / Timing Role: Primary battery monitor and protector managing cell balancing, voltage/temperature fault response, and communication with host controller via I²C. Use Value: Enables >10-year field deployment with <±5 mV cell voltage accuracy and 9-µA DEEPSLEEP current minimizing parasitic drain during idle periods. | Use Scenario: Real-time cell-level protection and SOC estimation in 10S–13S Li-ion packs subjected to high pulse currents and vibration. IC Role / Device Role / Timing Role: Central BMS IC performing synchronized voltage/current acquisition, overcurrent shutdown within 100 µs, and autonomous balancing during rest cycles. Use Value: Supports 200-A peak discharge with ±200-mV sense range and tolerates random cell attachment during mass production - reducing assembly yield loss. |
| Cordless Power Tools | Non-military Drones |
Use Scenario: High-dynamic-range monitoring of 10S–12S Li-ion packs under rapid charge/discharge cycles and thermal stress. IC Role / Device Role / Timing Role: Dual-ADC subsystem executing concurrent cell voltage and current measurements every 100 ms, feeding real-time protection decisions and coulomb counting. Use Value: Delivers <10 mV cell voltage error across –40°C to +85°C - ensuring accurate remaining capacity estimation despite ambient temperature swings. | Use Scenario: Compact, lightweight BMS for 6S–12S LiPo drone batteries requiring fast fault response and minimal board area. IC Role / Device Role / Timing Role: Integrated protector executing voltage, temperature, and current checks while driving CHG/DSG FETs directly - eliminating discrete driver ICs. Use Value: 48-pin TQFP footprint and multi-function pins (e.g., HDQ/ALERT/TS2 sharing) reduce total component count and PCB layer count in constrained airframes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor and protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ769141PFBR | Same 48-pin TQFP package and feature set, but lacks HDQ interface support - only I²C and SPI available | Suitable where one-wire communication is unnecessary and cost reduction is prioritized over interface flexibility | Select BQ769141PFBR if HDQ is unused and lower BOM cost is critical; otherwise BQ769142PFBR offers broader host compatibility |
| MAX17853GCM+ | 16-channel monitor in 48-pin QFN; supports up to 16 cells but requires external charge pump for high-side FET drive | Better suited for higher-cell-count (>14S) or automotive-grade applications with ASIL-B requirements | Choose MAX17853GCM+ only when scaling beyond 14 cells or requiring AEC-Q100 qualification; BQ769142PFBR integrates charge pump and fits 3–14S industrial use cases more tightly |
Compared with BQ769141PFBR and MAX17853GCM+, the BQ769142PFBR uniquely combines HDQ support, integrated charge pump, and OTP programmability in a single 48-pin TQFP - reducing external components and enabling production-line customization without firmware rework.
Availability
BQ769142PFBR is available at Aetrix Electronics and suitable for battery backup units, e-mobility systems, and cordless power tools requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.
Supply support for BQ769142PFBR 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 battery management system expertise.
The BQ769142PFBR belongs to TI's high-accuracy, multi-cell battery monitor and protector product line, designed specifically for industrial, e-mobility, and energy storage applications demanding precision, autonomy, and robustness in 3–14S Li-based battery packs.
FAQ
What is the maximum supported cell count for the BQ769142PFBR?
The BQ769142PFBR supports battery packs with 3 to 14 series-connected cells. This range covers common configurations including 10S e-bike packs, 12S cordless tool batteries, and 14S battery backup units. The device uses VC0 through VC14 pins to monitor individual cell voltages and perform balancing, with VC14 serving as the top-of-stack measurement point.
Does the BQ769142PFBR integrate a charge pump, and what is its purpose?
Yes, the BQ769142PFBR integrates an internal charge pump used to drive high-side NFET protection FETs. This eliminates the need for external bootstrap circuitry and enables reliable operation in high-voltage battery systems. The charge pump supports autonomous recovery after overvoltage or overcurrent faults, allowing automatic resumption of normal operation once conditions return to safe limits - a key capability in unattended industrial applications.
What communication interfaces does the BQ769142PFBR support, and how are they implemented?
The BQ769142PFBR supports three communication interfaces: 400-kHz I²C, SPI, and HDQ one-wire. These share multifunction pins (e.g., ALERT, SCL/SDA, HDQ, CFETOFF, DFETOFF), allowing flexible host connectivity without increasing pin count. I²C and SPI provide high-speed bidirectional communication for configuration and telemetry, while HDQ enables low-pin-count, half-duplex communication ideal for space-constrained or cost-sensitive designs using the BQ769142PFBR.
How does the BQ769142PFBR handle temperature monitoring?
The BQ769142PFBR supports temperature monitoring via one internal die sensor and up to nine external NTC thermistors connected to TS1, TS2, TS3, and multifunction pins (ALERT, HDQ, CFETOFF, DFETOFF, DCHG, DDSG). Each thermistor input is routed through the device's general-purpose ADC, enabling calibrated temperature readings across the full operating range. TS2 also serves as a wake source from SHUTDOWN mode, enhancing system responsiveness in cold-start scenarios using the BQ769142PFBR.
What power modes does the BQ769142PFBR offer, and what are their typical current draws?
The BQ769142PFBR offers four power modes: NORMAL (286 µA), multiple SLEEP options (24–41 µA), multiple DEEPSLEEP options (9–10 µA), and SHUTDOWN (1 µA). These modes enable optimized energy use across operational states - for example, DEEPSLEEP maintains RTC and wake capability while drawing less than 10 µA, extending shelf life in battery-powered equipment. All modes retain critical protection functions, ensuring safety even at lowest power states of the BQ769142PFBR.
BQ769142PFBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 3 ~ 14
- Fault Protection:
- Over/Under Voltage
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
BQ769142PFBR FAQ
1.How can I place an order for BQ769142PFBR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ769142PFBR 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 BQ769142PFBR reliable?
The price and inventory of BQ769142PFBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ769142PFBR is usually 5 days.
3.What payment methods are accepted for BQ769142PFBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ769142PFBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ769142PFBR?
BQ769142PFBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ769142PFBR 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 BQ769142PFBR?
For technical support, including BQ769142PFBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ769142PFBR requirements.
6.How does Aetrix verify that BQ769142PFBR is sourced from the original manufacturer or authorized distributors?
All BQ769142PFBR 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 BQ769142PFBR meets industry standards.
7.What is the process for return or replacement of BQ769142PFBR?
All BQ769142PFBR units undergo pre-shipment inspection (PSI). If there is an issue with BQ769142PFBR, 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 BQ769142PFBR part is unused and in its original packaging.
Return procedure for BQ769142PFBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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