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Texas Instruments BQ296230DSGR
- Part No.:
- BQ296230DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296230DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,853
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Product details
Overview
BQ296230DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.35V OVP threshold, 6.5s fixed delay timer, ±10mV OVP accuracy, 3.0V regulated output (2mA max), and 8-pin WSON (2mm × 2mm) 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 BQ296230DSGR datasheet, BQ296230DSGR pinout, BQ296230DSGR application, or BQ296230DSGR equivalent, this page delivers verified technical context, real-world implementation constraints, confirmed pin functions, and validated alternative options for second-level battery pack protection design.
Technical Context
The BQ296230DSGR implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.35V overvoltage threshold with 300mV hysteresis. An internal fixed 6.5s delay timer initiates upon any cell exceeding VOV before asserting the active-high OUT signal.
It integrates a self-disabling 3.0V regulated supply (REG) delivering up to 2mA, which turns off when any cell voltage drops below the factory-set 3.0V undervoltage threshold after a 6s delay. Supply current is 4µA with REG enabled and 1.2µA with REG disabled, and input leakage per sense pin is <100nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.35V ±10mV at 25°C - enables precise cell-level overvoltage cutoff without false triggers in multi-cell stacks |
| OVP Delay Timer | 6.5s fixed - provides controlled response window before fault assertion, allowing transient recovery |
| Regulated Output | 3.0V ±30mV @ 0–2mA - powers always-on RTC or supervisor circuits without external LDO |
| Supply Current | 4µA (REG on), 1.2µA (REG off) - minimizes standby drain in battery-backed systems |
| Sense Input Leakage | <100nA per V1–V4 pin - preserves cell voltage integrity and extends shelf life |
| Operating Temp | –40°C to +110°C - supports industrial and automotive battery pack environments |
| Package | 8-pin WSON, 2.0mm × 2.0mm - enables compact placement on space-constrained battery management PCBs |
Pinout & Package
8-pin WSON (2.00mm × 2.00mm) package with exposed thermal pad connected to VSS. Pin 1 is top-left corner (marking dot adjacent), pin numbering follows standard counter-clockwise sequence.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); powers internal circuitry and REG block; 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 | Monitors voltage across bottom cell (V1–VSS); requires 1kΩ/0.1µF RC filter for stable measurement |
| V2 | Cell 2 sense input | Monitors voltage across second cell (V2–V1); same RC filtering as V1; unused pins shorted to adjacent lower pin |
| V3 | Cell 3 sense input | Monitors voltage across third cell (V3–V2); supports 3- and 4-series configurations; filtered identically |
| V4 | Cell 4 sense input | Monitors voltage across top cell (V4–V3); only used in 4-series stacks; floating if unused |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground and blow protection circuit |
| REG | Regulated supply output | 3.0V output (2mA max); self-disables if any cell falls below 3.0V; requires 0.47µF ceramic capacitor to VSS |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell overvoltage detection | Independent monitoring of V1–VSS, V2–V1, V3–V2, V4–V3 ensures no single weak cell compromises stack safety |
| Factory-programmed OVP & UV thresholds | 4.35V OVP and 3.0V UV thresholds are laser-trimmed - eliminates external resistor networks and calibration effort |
| Self-disabling regulated output | REG automatically shuts down when any cell drops below 3.0V - prevents deep discharge and preserves battery health |
| Low-quiescent-current operation | 4µA supply current with REG active - extends runtime in always-on battery backup applications |
| Customer Test Mode (CTM) | Enables fast production validation of OVP delay timing by applying >10V differential between VDD and V4 |
Applications
| Ultrabook Battery Pack Protection | Notebook PC Secondary Protection |
|---|---|
Use Scenario: Monitors 3-series Li-ion cells in thin-profile ultrabooks where space and power efficiency are critical. IC Role / Device Role / Timing Role: Second-level overvoltage protector that asserts active-high OUT after 6.5s delay to trigger fuse-blowing FETs. Use Value: Prevents thermal runaway by cutting power before cell voltage exceeds 4.35V, while 3.0V REG powers RTC during sleep mode. |
Use Scenario: Implements redundant overvoltage safeguard alongside primary fuel gauge IC in premium notebooks. IC Role / Device Role / Timing Role: Standalone hardware-based OV detector with fixed 6.5s latency - immune to firmware errors or MCU lockup. Use Value: Guarantees fail-safe shutdown even if host system fails, meeting UL/IEC 62133 safety requirements. |
| Medical Portable Device Backup | UPS Battery Module Monitoring |
Use Scenario: Protects sealed 4-series Li-ion packs in portable diagnostic equipment requiring >10-year shelf life. IC Role / Device Role / Timing Role: Low-leakage (<100nA/cell) monitor maintaining cell balance during long-term storage. Use Value: Minimizes self-discharge-induced imbalance; 1.2µA REG-off current preserves charge for emergency use. |
Use Scenario: Embedded in rack-mount UPS battery modules to guard against charger overvoltage during grid fluctuations. IC Role / Device Role / Timing Role: Hardware-triggered fuse control activated only when sustained overvoltage exceeds 4.35V for 6.5s. Use Value: Avoids nuisance trips from brief surges while ensuring protection against sustained AC line faults. |
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 4.55V OVP threshold, 6.5s delay, 3.3V REG output - differs only in factory-programmed voltage setpoints | Requires redesign of downstream 3.3V-powered circuitry; not drop-in compatible due to REG voltage mismatch | Select when system RTC or supervisor requires 3.3V instead of 3.0V and OVP tolerance allows 4.55V |
| BQ296233DSGR | Identical 4.45V OVP and 3.3V REG, but uses 6.5s delay - differs in OVP threshold (4.45V vs. 4.35V) and REG voltage (3.3V vs. 3.0V) | Higher OVP threshold reduces protection margin; 3.3V REG may overstress 3.0V-rated peripherals | Only consider if battery chemistry tolerates higher cutoff voltage and external circuit accepts 3.3V supply |
Compared with BQ296230DSGR, BQ296221DSGR offers identical timing and package but shifts REG to 3.3V and OVP to 4.55V - requiring voltage rail compatibility checks; BQ296233DSGR changes both OVP (4.45V) and REG (3.3V), demanding full electrical validation before substitution.
Availability
BQ296230DSGR is available at Aetrix Electronics and suitable for notebook PC battery protection, ultrabook secondary safety systems, and medical portable device backup power requiring stable component supply, long-lifecycle support, and TI-qualified automotive-grade reliability.
Supply support for BQ296230DSGR 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 safety ICs and high-reliability industrial components.
The BQ296xxx product line is designed specifically for second-level hardware-based overvoltage protection in multi-cell Li-ion battery packs, targeting applications where firmware-independent safety and ultra-low quiescent current are mandatory.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296230DSGR?
The BQ296230DSGR has a factory-programmed overvoltage protection threshold of 4.35V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This value is laser-trimmed and cannot be adjusted externally. The device also includes 300mV hysteresis to prevent oscillation near the trip point, ensuring stable fault detection in noisy battery environments.
How does the regulated output (REG) of the BQ296230DSGR behave during battery discharge?
The BQ296230DSGR's REG pin delivers a stable 3.0V output up to 2mA, but self-disables when any monitored cell voltage falls below the factory-set 3.0V undervoltage threshold for 6 seconds. Once disabled, REG remains off until all cell voltages rise above 3.0V + 300mV hysteresis. This prevents deep discharge and protects connected RTC or supervisor circuits from brownout conditions.
What is the purpose and activation method of Customer Test Mode (CTM) in the BQ296230DSGR?
Customer Test Mode (CTM) in the BQ296230DSGR accelerates production testing of the 6.5s overvoltage delay timer. It activates when the voltage difference between VDD and V4 exceeds 10V - reducing the delay to >15ms for rapid verification. CTM exits automatically when the differential drops below 10V. Engineers must avoid exceeding absolute maximum ratings on any pin during CTM entry or exit to prevent permanent damage to the BQ296230DSGR.
Can the BQ296230DSGR support 2-series, 3-series, and 4-series battery configurations?
Yes, the BQ296230DSGR supports 2-, 3-, and 4-series Li-ion configurations via its V1–V4 sense inputs. For 2-series use, connect V1 and V2 only; short V3 to V2 and V4 to V3. For 3-series, use V1–V3 and short V4 to V3. All unused sense pins must be shorted to the adjacent lower pin - never left floating - to ensure accurate voltage monitoring and prevent erroneous OVP triggering in the BQ296230DSGR.
What are the critical layout requirements for reliable operation of the BQ296230DSGR?
Reliable BQ296230DSGR operation requires: (1) connecting VSS before any other pin during assembly to avoid REG pin damage; (2) placing 1kΩ/0.1µF RC filters directly at each Vx pin; (3) mounting the 0.47µF REG capacitor within 2mm of REG and VSS pins; and (4) routing the OUT signal to the FET gate with minimal trace inductance. Failure to follow these rules risks false OVP trips, REG instability, or permanent IC damage during cell connection.
BQ296230DSGR 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)
BQ296230DSGR FAQ
1.How can I place an order for BQ296230DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296230DSGR 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 BQ296230DSGR reliable?
The price and inventory of BQ296230DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296230DSGR is usually 5 days.
3.What payment methods are accepted for BQ296230DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296230DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296230DSGR?
BQ296230DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296230DSGR 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 BQ296230DSGR?
For technical support, including BQ296230DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296230DSGR requirements.
6.How does Aetrix verify that BQ296230DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296230DSGR 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 BQ296230DSGR meets industry standards.
7.What is the process for return or replacement of BQ296230DSGR?
All BQ296230DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296230DSGR, 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 BQ296230DSGR part is unused and in its original packaging.
Return procedure for BQ296230DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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