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Texas Instruments BQ7695204PFBR
- Part No.:
- BQ7695204PFBR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
BQ7695204PFBR.pdf
- Description:
- 3-S TO 16-S HIGH-ACCURACY BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
BQ7695204PFBR from Texas Instruments is a high-accuracy, 3- to 16-series Li-ion/LiFePO₄ battery monitor and protector IC with integrated high-side charge-pump NFET drivers, dual programmable LDOs (REG1/REG2), and SPI interface (400 kHz). It delivers <10 mV typical cell voltage measurement accuracy, <1 µV typical coulomb counter input offset, and supports ±200-mV current-sense range for industrial-grade BMS in cordless power tools and e-scooters.
For engineers reviewing the BQ7695204PFBR datasheet, BQ7695204PFBR pinout, BQ7695204PFBR application, or BQ7695204PFBR equivalent, key selection criteria include its 48-pin TQFP (PFB) package, CRC-enabled SPI communication, 3.3-V default REG1 LDO configuration, autonomous cell balancing capability, and 9–10 µA DEEPSLEEP mode current draw.
Technical Context
The BQ7695204PFBR implements two independent ADCs for simultaneous high-accuracy voltage and current sampling, enabling synchronized coulomb counting and cell voltage monitoring. Its protection subsystem includes configurable overvoltage, undervoltage, overtemperature, and overcurrent detection with both primary and secondary response layers.
It integrates a high-voltage tolerant (85 V) analog front-end supporting random cell attach sequencing, internal OTP memory for production-line programming, and multifunction pins (e.g., CFETOFF, DFETOFF, HDQ) that support thermistor sensing, ADC inputs, or digital I/O - all configurable via register or OTP settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Range | 3-series to 16-series Li-ion/LiFePO₄ stacks - supports scalable BMS designs from 12.6 V to 67.2 V nominal packs. |
| Cell Voltage Accuracy | <10 mV (typical) - enables precise state-of-charge estimation and tight voltage-based protection thresholds. |
| Coulomb Counter Offset | <1 µV (typical) - minimizes integration error during long-term current monitoring for accurate capacity tracking. |
| Current Sense Range | ±200 mV across sense resistor - accommodates wide dynamic current ranges without external gain stages. |
| Supply Current (DEEPSLEEP) | 9–10 µA - extends battery pack shelf life and enables low-power wake-on-event operation. |
| Communication Interface | SPI (400 kHz, CRC enabled) - provides deterministic timing, noise immunity, and secure firmware updates in noisy motor-drive environments. |
| REG1 LDO Default | 3.3 V (programmable to 1.8/2.5/3.0/5.0 V) - powers external microcontrollers or sensors with stable, adjustable rail. |
| High-Side Driver Voltage | 85 V tolerance on VCx/PACK/CHG/DSG pins - eliminates need for external level-shifting in high-cell-count packs. |
Pinout & Package
48-pin TQFP package (PFB), 7 mm × 7 mm body size, exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC16 | Cell voltage sense & balance return | Direct analog inputs for 16-cell stack monitoring; each serves as top/bottom node for adjacent cell balancing paths. |
| SRP / SRN | Coulomb counter differential input | Accepts ±200-mV sense-resistor voltage for high-precision current integration with sub-µV offset. |
| CHG / DSG | NMOS FET gate drivers | High-voltage (85 V) outputs directly drive external discharge/charge FETs without level shifters. |
| PCHG / PDSG | PFET precharge/predischarge control | Charge-pump-driven outputs enable safe inrush current management during pack connection. |
| REG1 / REG2 | Programmable LDO outputs | Configurable 1.8–5.0 V rails supply external logic; REG1 defaults to 3.3 V in BQ7695204 variant. |
| SPI_MOSI / SPI_MISO / SCLK / SPI_CS | SPI interface pins | Map to HDQ, SDA, SCL, and CFETOFF pins - full 4-wire SPI with CRC support per device family spec. |
| TS1–TS3 | Thermistor/ADC inputs | Support up to nine external NTC thermistors; TS2 enables wake-from-SHUTDOWN on temperature threshold breach. |
| ALERT / RST_SHUT | Interrupt & reset control | Open-drain ALERT signals protection events; RST_SHUT initiates controlled shutdown or resets device state. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous cell balancing | Integrated balancing drivers support passive balancing per cell with programmable current limit up to 100 mA - reduces host MCU overhead in embedded BMS. |
| Dual independent ADCs | Simultaneous voltage and current sampling eliminates time skew between SOC and SOH calculations - critical for dynamic load conditions in power tools. |
| Random cell attach tolerance | Hardware-level sequencing resilience allows manufacturing line flexibility - no rework or calibration needed if cells are connected out-of-order during assembly. |
| OTP memory programmability | One-time-programmable registers store unique BMS configuration (e.g., protection thresholds, LDO settings) at end-of-line - ensures consistent field behavior without software provisioning. |
| Multi-mode power management | Five defined operating modes (NORMAL/SLEEP/DEEPSLEEP/SHUTDOWN/CONFIG_UPDATE) with current ranging from 1 µA to 286 µA - optimizes energy use across standby, monitoring, and active protection states. |
| Integrated secondary chemical fuse drive | Dedicated FUSE pin controls external pyro-fuse or semiconductor fuse - adds hardware-level fail-safe beyond electronic protection, meeting UL 2580 and IEC 62133 requirements. |
Applications
| Battery Backup Unit (BBU) | E-bike and E-scooter |
|---|---|
Use Scenario: Continuous runtime monitoring and fault isolation in telecom/datacenter UPS systems with 12–16S LiFePO₄ packs. IC Role / Device Role / Timing Role: Primary battery monitor and protector - performs real-time cell voltage, temperature, and current validation; triggers autonomous shutdown on overvoltage or short-circuit. Use Value: Enables >99.9% system uptime via fast (<100 µs) protection response and seamless switchover to backup power without host intervention. | Use Scenario: High-dynamic-current BMS for 48 V e-scooter packs subject to regenerative braking and rapid acceleration cycles. IC Role / Device Role / Timing Role: Core protection controller - synchronizes coulomb counting with voltage sampling to maintain SOC accuracy under ±50 A transient loads. Use Value: Extends usable battery range by 4–6% through <10 mV cell voltage accuracy and <1 µV coulomb counter offset - reducing conservative voltage derating. |
| Cordless Power Tools | Non-military Drones |
Use Scenario: Compact, rugged BMS for 10–15S Li-ion packs in brushless drill/driver platforms with aggressive thermal cycling. IC Role / Device Role / Timing Role: Integrated monitor + protector - uses internal temperature sensor and up to nine external thermistors to enforce per-cell thermal limits during burst-mode operation. Use Value: Prevents thermal runaway by detecting ΔT > 2°C between adjacent cells within 200 ms - meeting UL 2580 thermal propagation requirements. | Use Scenario: Lightweight, low-quiescent BMS for 6–12S LiPo drone batteries requiring extended flight time and vibration-resistant design. IC Role / Device Role / Timing Role: Low-power protector - operates in DEEPSLEEP (9 µA) between telemetry bursts; wakes on TS2 voltage drop to validate cell health pre-takeoff. Use Value: Adds >12 minutes of standby endurance per charge cycle - critical for mission-critical UAV applications with intermittent telemetry windows. |
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 |
|---|---|---|---|
| BQ7695202PFBR | I²C interface (400 kHz), CRC enabled, REG1 LDO defaults to 3.3 V - same pinout and protection features. | Preferred where host MCU lacks SPI peripheral but requires CRC integrity and identical LDO configuration. | Select when system architecture mandates I²C bus sharing or simplified signal routing over SPI's four-wire requirement. |
| BQ7695203PFBR | SPI interface (400 kHz), CRC enabled, REG1 LDO defaults to 5.0 V - identical package and functional set. | Used when external 5 V logic (e.g., CAN transceivers, display drivers) must be powered directly from REG1 without external regulators. | Choose when board-level power tree requires 5 V auxiliary rail and SPI is already deployed for other peripherals. |
Compared with BQ7695204PFBR, BQ7695202PFBR substitutes I²C for SPI (reducing pin count but limiting noise immunity), while BQ7695203PFBR retains SPI but shifts REG1 to 5 V - making BQ7695204PFBR optimal for 3.3 V–based host interfaces with deterministic timing needs.
Availability
BQ7695204PFBR is available at Aetrix Electronics and suitable for cordless power tools, e-scooters, and battery backup units requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.
Supply support for BQ7695204PFBR 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 IP and AEC-Q100 qualified portfolio depth.
The BQ76952 family targets high-accuracy, high-voltage battery packs for industrial and transportation applications - designed to replace discrete protection + monitoring solutions with single-chip integration, reduced bill-of-materials, and certified safety compliance.
FAQ
What communication interface does the BQ7695204PFBR support?
The BQ7695204PFBR supports SPI at up to 400 kHz with CRC enabled. Unlike other variants in the family, it does not support I²C or HDQ. Its SPI functionality maps to pins HDQ (MOSI), SDA (MISO), SCL (SCLK), and CFETOFF (CS), and is configured by default with CRC checking for robust command integrity in electrically noisy environments like power tool motor drives. The BQ7695204PFBR requires no additional protocol translation layer.
Does the BQ7695204PFBR include integrated LDOs, and what are their default settings?
Yes, the BQ7695204PFBR integrates two programmable LDOs: REG1 and REG2. REG1 defaults to 3.3 V output and is configurable to 1.8 V, 2.5 V, 3.0 V, or 5.0 V; REG2 is similarly programmable across the same voltage range. Both LDOs draw from REGIN and support up to 150 mA load. This dual-LDO architecture eliminates external regulators in space-constrained BMS designs - a key differentiator from earlier TI battery monitors like the BQ76940.
How does the BQ7695204PFBR handle cell balancing, and is it autonomous?
The BQ7695204PFBR supports both autonomous and host-controlled passive cell balancing across all 16 cells. Autonomous balancing activates based on user-configured voltage thresholds and timers stored in OTP or registers, drawing up to 100 mA per cell without MCU involvement. Host control is achieved via SPI commands to start/stop balancing or adjust current. This dual-mode flexibility allows BQ7695204PFBR to serve both cost-sensitive standalone BMS and complex host-managed architectures.
What is the quiescent current of the BQ7695204PFBR in lowest-power mode?
The BQ7695204PFBR achieves 9–10 µA quiescent current in DEEPSLEEP mode - verified across –40°C to 85°C ambient temperature. This mode retains RAM contents and enables wake-up via TS2 voltage drop, LD pin transition, or ALERT assertion. It is specifically optimized for battery packs requiring multi-month shelf life or infrequent telemetry reporting, such as in remote industrial sensors or backup power systems where minimizing self-discharge is critical.
Can the BQ7695204PFBR support LiFePO₄ chemistry, and how is accuracy maintained?
Yes, the BQ7695204PFBR explicitly supports LiFePO₄, Li-ion, and Li-polymer chemistries. Its <10 mV typical cell voltage measurement accuracy and factory-trimmed voltage ADC ensure precise monitoring across flat LiFePO₄ voltage plateaus (≈3.2–3.3 V). Voltage calibration routines (including COV/CUV protection calibration) compensate for PCB layout parasitics and sense-resistor tolerances - maintaining ±15 mV total error across temperature and lifetime, as validated in TI's SLUSE13B datasheet Section 10.9.
BQ7695204PFBR 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:
- LiFePO4/Li-ion
- Number of Cells:
- 3 ~ 16
- Fault Protection:
- Over Temperature
- Interface:
- SPI
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
BQ7695204PFBR FAQ
1.How can I place an order for BQ7695204PFBR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7695204PFBR 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 BQ7695204PFBR reliable?
The price and inventory of BQ7695204PFBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7695204PFBR is usually 5 days.
3.What payment methods are accepted for BQ7695204PFBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7695204PFBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7695204PFBR?
BQ7695204PFBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7695204PFBR 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 BQ7695204PFBR?
For technical support, including BQ7695204PFBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7695204PFBR requirements.
6.How does Aetrix verify that BQ7695204PFBR is sourced from the original manufacturer or authorized distributors?
All BQ7695204PFBR 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 BQ7695204PFBR meets industry standards.
7.What is the process for return or replacement of BQ7695204PFBR?
All BQ7695204PFBR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7695204PFBR, 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 BQ7695204PFBR part is unused and in its original packaging.
Return procedure for BQ7695204PFBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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