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Texas Instruments BQ296223DSGR
- Part No.:
- BQ296223DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296223DSGR.pdf
- Description:
- IC BATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BQ296223DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.50 V OVP threshold, 6.5 s fixed delay timer, ±10 mV OVP accuracy, 3.3 V regulated output (2 mA max), and 8-pin WSON (2 mm × 2 mm) package. It monitors each cell independently and drives external FETs to blow fuses during overvoltage faults in notebook PC battery protection circuits.
For engineers reviewing the BQ296223DSGR datasheet, BQ296223DSGR pinout, BQ296223DSGR application, or BQ296223DSGR equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, leakage current specs (<100 nA/cell), and precise alternative part comparisons - all grounded in TI's production-grade SLUSBU5V documentation.
Technical Context
The BQ296223DSGR implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.50 V OVP threshold with ±10 mV accuracy at 25°C and 300–400 mV hysteresis. Its internal fixed-delay timer (6.5 s) initiates only upon detection of any cell exceeding VOV and triggers CMOS-active-high OUT after expiration.
It integrates a 3.3 V regulated supply (±0.066 V at 500 µA load) with self-disable functionality activated when any cell falls below factory-configured 2.5 V undervoltage threshold for ≥6 s; the REG output remains stable under 2 mA load with 0.47 µF ceramic capacitor and exhibits <1.2 µA quiescent current when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.50 V ±10 mV at 25°C - ensures precise cell-level overvoltage cutoff without premature tripping in 3S/4S packs. |
| OVP Delay Timer | 6.5 s fixed - provides robust fault confirmation window before triggering fuse-blowing FET drive. |
| Regulated Output | 3.3 V ±0.066 V at 500 µA - powers RTC or always-on logic with tight regulation and 2 mA max sourcing capability. |
| Supply Current | ~4 µA (REG on), ~1.2 µA (REG off) - enables multi-year battery shelf life in backup systems. |
| Cell Input Leakage | <100 nA per Vx pin - minimizes parasitic discharge and preserves cell voltage balance over time. |
| Operating Temp | –40°C to +110°C - supports operation in thermally demanding laptop and medical battery environments. |
| Package | 8-pin WSON (2.0 mm × 2.0 mm) - enables compact placement on space-constrained battery management PCBs. |
Pinout & Package
8-pin WSON (2.00 mm × 2.00 mm) package with exposed thermal pad connected to VSS. Pin 1 is top-left corner (marking dot adjacent), pin numbering clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20 V); powers internal circuitry and REG LDO; requires RC filter for noise immunity. |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; must be connected first during assembly to prevent REG damage. |
| V1 | Cell 1 sense input | Sense positive terminal of bottommost cell (V1–VSS); requires 1 kΩ/0.1 µF RC filter per TI layout guidelines. |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); unused pins shorted to adjacent lower Vx for 2S/3S configurations. |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); supports full 4S stack monitoring when all Vx pins used. |
| V4 | Cell 4 sense input | Sense positive terminal of topmost cell (V4–V3); enables complete 4-series cell voltage supervision. |
| OUT | Overvoltage fault signal | CMOS active-high output; drives NMOS gate to short fuse to ground during confirmed OVP event. |
| REG | Regulated supply output | 3.3 V output (2 mA max); self-disables if any cell drops below 2.5 V for ≥6 s; requires 0.47 µF ceramic cap. |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell OVP monitoring | Independent analog sensing of V1–VSS, V2–V1, V3–V2, V4–V3 enables precise fault isolation in stacked Li-ion packs. |
| Factory-programmed OVP | 4.50 V threshold with ±10 mV accuracy eliminates external resistor trimming and reduces BOM count. |
| Self-disabling REG output | Automatically disables 3.3 V supply when any cell falls below 2.5 V for 6 s - prevents deep discharge and extends pack life. |
| Ultra-low leakage inputs | <100 nA per Vx pin minimizes inter-cell voltage drift and avoids false OVP/UV trips during long-term storage. |
| Customer Test Mode (CTM) | Enables fast validation of OVP delay timer via VDD–V4 ≥10 V differential - cuts production test time without compromising reliability. |
Applications
| Notebook PC Battery Protection | Ultrabook Power Management |
|---|---|
Use Scenario: Monitors 3S or 4S Li-ion cells in slim-profile laptop battery packs during charging and standby. IC Role / Device Role / Timing Role: Second-level OVP supervisor that triggers fuse blow only after 6.5 s sustained overvoltage, preventing nuisance trips from transient spikes. Use Value: Enables safe, certified battery operation per IEC 62133 while preserving runtime via ultra-low 1.2 µA REG-off quiescent current. |
Use Scenario: Provides regulated 3.3 V supply to real-time clock and fuel gauge ICs during system sleep states. IC Role / Device Role / Timing Role: Dual-function device: OVP protector and always-on power rail generator with self-disable on cell undervoltage. Use Value: Eliminates need for separate LDO, reducing component count and PCB area in space-constrained ultrabook battery modules. |
| Medical Portable Device Backup | UPS Battery Monitoring |
Use Scenario: Secures critical Li-ion backup power in portable diagnostic equipment requiring >10-year shelf life. IC Role / Device Role / Timing Role: Low-leakage (100 nA/cell) voltage supervisor ensuring cell balance retention during long-term storage. Use Value: Prevents capacity loss and premature failure by avoiding parasitic discharge paths that degrade cell matching. |
Use Scenario: Supervises 4S Li-ion strings in small-format UPS units where fuse integrity is essential for safety compliance. IC Role / Device Role / Timing Role: Fault detector driving external NMOS to short fuse to ground using battery/charger energy - no auxiliary power required. Use Value: Achieves fail-safe shutdown without external controllers, meeting UL 1989 and IEC 62368-1 secondary protection requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296221DSGR | Same 4.55 V OVP threshold, 6.5 s delay, 3.3 V REG output, identical WSON-8 package and pinout. | Designed for marginally higher OVP tolerance (4.55 V vs. 4.50 V); suitable where tighter cell voltage control is not required. | Select BQ296221DSGR if design allows +50 mV OVP headroom and shares same layout and firmware. |
| BQ296231DSGR | 4.60 V OVP threshold, 6.5 s delay, 3.3 V REG output, same package and pinout; ±10 mV accuracy maintained. | Targeted at high-voltage Li-ion chemistries (e.g., NMC 4.6 V nominal); not recommended for standard 4.2 V/cell packs. | Choose BQ296231DSGR only when battery chemistry supports 4.60 V per-cell operation and thermal derating is validated. |
Compared with BQ296223DSGR, BQ296221DSGR offers relaxed OVP margin for cost-sensitive designs, while BQ296231DSGR enables next-gen high-voltage cells - both retain identical timing, regulator behavior, and layout compatibility, simplifying qualification across variants.
Availability
BQ296223DSGR is available at Aetrix Electronics and suitable for notebook PC battery protection, ultrabook power management, and medical portable device backup requiring stable component supply, long-term lifecycle support, and TI-qualified second-level OVP functionality.
Supply support for BQ296223DSGR 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, embedded processing, and power management solutions with emphasis on reliability, precision, and energy efficiency.
The BQ296xxx family is designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, integrating precision voltage monitoring, programmable timing, and regulated supply generation in a single compact IC.
FAQ
What is the factory-programmed overvoltage threshold for BQ296223DSGR?
The BQ296223DSGR has a factory-programmed overvoltage threshold of 4.50 V with ±10 mV accuracy at 25°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The threshold remains stable across temperature (±54 mV at 110°C) and supports reliable second-level protection in 3S and 4S Li-ion battery configurations without calibration components.
How does the regulated output (REG) of BQ296223DSGR behave during cell undervoltage?
The BQ296223DSGR REG pin delivers a stable 3.3 V output until any monitored cell voltage falls below the factory-set 2.5 V undervoltage threshold for ≥6 s, at which point it self-disables. Once all cells rise above 2.55 V (2.5 V + 50 mV hysteresis), REG automatically re-enables. This prevents deep discharge and preserves battery health in long-idle applications like medical backup systems.
Is BQ296223DSGR pin-compatible with other BQ2962 variants?
Yes, BQ296223DSGR is fully pin-compatible with all BQ2962-x variants in the 8-pin WSON package, including identical VDD, VSS, V1–V4, OUT, and REG pin assignments and electrical characteristics. Layouts designed for any BQ2962 variant can accommodate BQ296223DSGR without modification, enabling drop-in replacement for OVP threshold tuning during design iteration or qualification.
What is the maximum load current supported by the REG output of BQ296223DSGR?
The BQ296223DSGR REG output supports up to 2 mA continuous load current with ±0.1 V regulation error (3.20–3.40 V) across 0–2 mA and operating temperature. Short-circuit current is internally limited to 4 mA. For optimal stability, TI mandates a 0.47 µF ceramic capacitor placed directly between REG and VSS, with layout minimizing trace inductance.
Does BQ296223DSGR require external passive components for basic operation?
Yes, BQ296223DSGR requires external components for reliable operation: 1 kΩ/0.1 µF RC filters on each Vx pin for noise immunity, a 0.47 µF ceramic capacitor on REG–VSS, and a 0.1 µF capacitor on VDD–VSS. These are mandatory per TI's SLUSBU5V datasheet; omitting them risks false OVP/UV trips, regulator instability, or ESD vulnerability in production battery packs.
BQ296223DSGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 2 ~ 4
- Fault Protection:
- Over Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ296223DSGR FAQ
1.How can I place an order for BQ296223DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296223DSGR 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 BQ296223DSGR reliable?
The price and inventory of BQ296223DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296223DSGR is usually 5 days.
3.What payment methods are accepted for BQ296223DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296223DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296223DSGR?
BQ296223DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296223DSGR 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 BQ296223DSGR?
For technical support, including BQ296223DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296223DSGR requirements.
6.How does Aetrix verify that BQ296223DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296223DSGR 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 BQ296223DSGR meets industry standards.
7.What is the process for return or replacement of BQ296223DSGR?
All BQ296223DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296223DSGR, 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 BQ296223DSGR part is unused and in its original packaging.
Return procedure for BQ296223DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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