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Texas Instruments BQ296212DSGR
- Part No.:
- BQ296212DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296212DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BQ296212DSGR 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, 3-second fixed delay timer, ±10 mV OVP accuracy, active-high OUT signal, and 3.3 V regulated output supply delivering up to 2 mA. It serves as second-level protection in notebook PC battery management systems.
For engineers reviewing the BQ296212DSGR datasheet, BQ296212DSGR pinout, BQ296212DSGR application, or BQ296212DSGR equivalent, key selection considerations include its 3.3 V REG output capability, 3 s OVP delay, 4.50 V OVP threshold, self-disable undervoltage logic (2.5 V UV threshold), and WSON-8 package compatibility with space-constrained battery pack layouts.
Technical Context
The BQ296212DSGR independently monitors each cell voltage (V1–V4) against a preprogrammed 4.50 V overvoltage threshold with ±10 mV accuracy at 25°C and 54 mV drift across –40°C to +110°C. Upon detection, it initiates a fixed 3-second internal delay before asserting the active-high OUT signal to drive an external NMOS FET for fuse blow control.
Its integrated 3.3 V regulated output delivers up to 2 mA and self-disables when any cell voltage falls below the factory-set 2.5 V undervoltage threshold for 6 seconds. Supply current is 4 µA (REG on) or 1.2 µA (REG off), with per-cell input leakage < 100 nA and thermal resistance RθJA = 62 °C/W in the 2 mm × 2 mm WSON package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.50 V ±10 mV at 25°C - enables precise cell voltage clamping without external calibration |
| OVP Delay Timer | 3.0 s (±20%) - provides deterministic fault response timing for fuse-blow coordination |
| Regulated Output | 3.3 V ±30 mV at 500 µA load - powers RTC or low-power always-on circuits without external LDO |
| Supply Current | 4 µA (REG enabled) / 1.2 µA (REG disabled) - minimizes quiescent drain during standby and deep discharge |
| Cell Input Leakage | < 100 nA per Vx pin - preserves cell balance and extends shelf life in multi-cell stacks |
| Operating Temp | –40°C to +110°C - supports operation in high-temperature battery compartments and industrial environments |
| Package | WSON-8 (2.0 mm × 2.0 mm, 0.75 mm height) - enables compact placement directly on battery PCBs |
Pinout & Package
Package: 8-pin WSON (2.00 mm × 2.00 mm, exposed thermal pad connected to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20 V); connects to top of battery stack; 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 |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); same filtering as V1 |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); used in 3- and 4-series configurations |
| V4 | Cell 4 sense input | Sense positive terminal of topmost cell (V4–V3); unused and shorted to V3 in 2- or 3-series designs |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground upon OVP event |
| REG | Regulated supply output | 3.3 V, 2 mA max; powers external RTC or monitoring circuit; self-disables below 2.5 V cell voltage |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.50 V threshold with ±10 mV accuracy ensures consistent cell protection without trimming components |
| Fixed 3-s OVP delay | Deterministic timing eliminates need for external timing capacitors and reduces BOM count |
| Self-disable REG output | Automatically disables 3.3 V supply when any cell drops below 2.5 V, preventing deep discharge damage |
| Ultra-low leakage | <100 nA per cell input maintains voltage balance across stacked cells during storage |
| Integrated 3.3 V regulator | Delivers 2 mA with ±30 mV regulation - replaces discrete LDO in RTC power paths |
Applications
| Notebook PC Battery Pack | Ultrabook Power Management |
|---|---|
Use Scenario: Monitors 3-series Li-ion cells in slim-profile laptop battery modules where space and thermal constraints limit discrete protection solutions. IC Role / Device Role / Timing Role: Second-level OVP supervisor that triggers fuse blow via NMOS FET after 3 s delay upon detecting >4.50 V on any cell. Use Value: Prevents thermal runaway by enforcing strict voltage limits while enabling compact layout via 2 mm × 2 mm WSON package. |
Use Scenario: Powers real-time clock and fuel gauge microcontroller in ultrabooks requiring always-on functionality with minimal standby current. IC Role / Device Role / Timing Role: Dual-function device providing both overvoltage protection and regulated 3.3 V supply with self-disable below 2.5 V cell voltage. Use Value: Eliminates need for separate LDO and protector IC, reducing component count and PCB area in constrained battery PCBs. |
| Medical Portable Device | UPS Battery Backup System |
Use Scenario: Protects sealed 4-series Li-ion packs in portable diagnostic equipment requiring long shelf life and high reliability. IC Role / Device Role / Timing Role: Cell-level voltage monitor with <100 nA input leakage and –40°C to +110°C operation for wide ambient range. Use Value: Maintains cell balance during storage and prevents false trips under transient loads due to ±10 mV OVP accuracy. |
Use Scenario: Secures backup battery strings in uninterruptible power supplies where overvoltage events may occur during charger faults. IC Role / Device Role / Timing Role: Fault detector that asserts active-high OUT signal to activate external MOSFET-based fuse disconnect path. Use Value: Enables fast, predictable fuse activation (3 s delay) without software intervention, improving system safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296213DSGR | 4.35 V OVP threshold (vs. 4.50 V), same 3 s delay and 3.3 V REG output | Better suited for lower-voltage Li-ion chemistries or tighter margin designs | Select when nominal cell voltage is ≤4.35 V and higher trip margin is not required |
| BQ296223DSGR | 6.5 s OVP delay (vs. 3 s), identical 4.50 V OVP and 3.3 V REG output | Provides longer fault confirmation window for noisy or transient-prone battery environments | Select when system requires extended delay to avoid nuisance trips from voltage spikes |
Compared with BQ296212DSGR, BQ296213DSGR offers lower OVP sensitivity for conservative cell voltage margins, while BQ296223DSGR trades faster response for improved noise immunity via extended delay - both retain identical package, REG output, and thermal performance.
Availability
BQ296212DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ296212DSGR 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 protection and power system design.
The BQ296xxx family is designed specifically for second-level overvoltage protection and regulated supply generation in multi-cell Li-ion battery packs - targeting high-accuracy, ultra-low-power, and space-constrained applications.
FAQ
What is the factory-programmed overvoltage threshold for BQ296212DSGR?
The BQ296212DSGR 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, with worst-case drift of ±54 mV from –40°C to +110°C, ensuring reliable cell protection without recalibration.
Does BQ296212DSGR support 2-cell, 3-cell, and 4-cell battery configurations?
Yes, BQ296212DSGR supports 2-, 3-, and 4-series Li-ion configurations. It monitors differential voltages across V1–VSS, V2–V1, V3–V2, and V4–V3. Unused sense pins (e.g., V4 in a 2-cell stack) must be shorted to the adjacent lower pin (V3) - no external resistors or jumpers are needed beyond standard RC filters on active inputs.
What is the function of the REG pin on BQ296212DSGR?
The REG pin on BQ296212DSGR provides a factory-set 3.3 V regulated output capable of sourcing up to 2 mA. It powers always-on circuits like RTCs or fuel gauges. The output self-disables when any monitored cell voltage falls below the 2.5 V undervoltage threshold for 6 seconds, preventing excessive discharge and protecting battery health.
How does the OUT pin behave during an overvoltage event on BQ296212DSGR?
During an overvoltage event, the OUT pin on BQ296212DSGR transitions from low to active-high after a fixed 3-second internal delay. It drives CMOS high with VOH ≥ VDD – 0.3 V at 100 µA sink, directly controlling an external NMOS FET gate to short the fuse to ground - enabling battery or charger current to blow the fuse and isolate the pack.
What package type and footprint does BQ296212DSGR use?
BQ296212DSGR uses an 8-pin WSON package measuring 2.00 mm × 2.00 mm with 0.75 mm height and an exposed thermal pad. The pinout is optimized for battery stack routing: V1–V4 on one side, VDD/VSS/OUT/REG on the other. The small footprint supports high-density battery PCB layouts while maintaining thermal performance (RθJA = 62 °C/W).
BQ296212DSGR 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)
BQ296212DSGR FAQ
1.How can I place an order for BQ296212DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296212DSGR 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 BQ296212DSGR reliable?
The price and inventory of BQ296212DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296212DSGR is usually 5 days.
3.What payment methods are accepted for BQ296212DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296212DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296212DSGR?
BQ296212DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296212DSGR 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 BQ296212DSGR?
For technical support, including BQ296212DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296212DSGR requirements.
6.How does Aetrix verify that BQ296212DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296212DSGR 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 BQ296212DSGR meets industry standards.
7.What is the process for return or replacement of BQ296212DSGR?
All BQ296212DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296212DSGR, 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 BQ296212DSGR part is unused and in its original packaging.
Return procedure for BQ296212DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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