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Texas Instruments BQ296215DSGR
- Part No.:
- BQ296215DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296215DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
BQ296215DSGR 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, active-high OUT signal, and 3.0 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 BQ296215DSGR datasheet, BQ296215DSGR pinout, BQ296215DSGR application, or BQ296215DSGR equivalent, key selection criteria include OVP threshold tolerance, regulated output voltage stability under load, self-disable behavior during cell undervoltage, leakage current per sense input (<100 nA), and WSON-8 package compatibility with high-density battery pack layouts.
Technical Context
The BQ296215DSGR independently monitors each cell voltage (V1–VSS through V4–V3) using precision analog comparators referenced to a factory-trimmed 4.50 V overvoltage threshold with 300 mV hysteresis. Upon detection of any cell exceeding VOV, an internal 6.5 s fixed-delay timer initiates before asserting the CMOS-active-high OUT signal to drive an external NMOS fuse-control FET.
Its integrated 3.0 V regulated supply (REG) delivers up to 2 mA with ±30 mV load regulation (0–2 mA), self-disables when any cell falls below the factory-set 2.5 V undervoltage threshold for 6 s, and draws only 1.2 µA quiescent current when disabled - enabling always-on RTC support without significant battery drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | Factory-programmed 4.50 V ±10 mV at 25°C; ensures precise cell-level overcharge cutoff without margin-induced premature shutdown |
| OVP Delay Timer | Fixed 6.5 s delay (±20%); provides deterministic fault response window for fuse-blow coordination with charger/battery system timing |
| Regulated Output | 3.0 V ±30 mV from 0–2 mA load; powers real-time clocks or low-power supervisors with stable voltage despite cell stack voltage variation |
| Supply Current (REG on) | 4–8 µA across –40°C to +110°C; enables multi-year operation in always-on battery backup applications |
| Input Leakage (per cell) | <100 nA at Vx pins; minimizes measurement error and prevents cell imbalance in high-impedance sensing networks |
| Undervoltage Threshold | Factory-set 2.5 V ±50 mV with 300 mV hysteresis; triggers REG disable after 6 s to prevent deep discharge damage to Li-ion cells |
| Output Drive | CMOS active-high OUT; sinks ≥4.5 mA during OV fault, compatible with standard NMOS gate-drive requirements for fuse control |
Pinout & Package
Package: 8-pin WSON (2.00 mm × 2.00 mm), thermally enhanced with exposed pad connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20 V); supplies 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 avoid REG pin damage |
| V1 | Cell 1 sense input | Sense positive terminal of bottom cell (V1–VSS); high-impedance analog input with <100 nA leakage |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); identical electrical characteristics to V1–V4 |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); supports 3- and 4-series configurations |
| V4 | Cell 4 sense input | Sense positive terminal of top cell (V4–V3); unused pins in 2- or 3-series stacks must be shorted to adjacent Vx |
| OUT | Fault signal output | CMOS active-high output; asserts after 6.5 s OVP delay to drive external NMOS FET for fuse blow |
| REG | Regulated supply output | 3.0 V output (0–2 mA); requires 0.47 µF ceramic capacitor near pin; self-disables if any cell <2.5 V for 6 s |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.50 V threshold with ±10 mV accuracy at 25°C and ±54 mV over –40°C to +110°C - eliminates external resistor trimming |
| Configurable REG output | 3.0 V option (BQ2962 family) with 2 mA drive capability and built-in short-circuit current limiting (4 mA max) - supports RTCs without external regulators |
| Self-disable undervoltage protection | Automatically disables REG when any cell drops below 2.5 V for 6 s - prevents battery depletion while preserving supervisor functionality |
| Ultra-low quiescent current | 1.2 µA with REG disabled - extends shelf life and standby time in medical and UPS battery packs |
| Robust fault signaling | Active-high CMOS OUT with 4.5 mA sink strength and 8 V absolute max rating - directly drives standard NMOS fuse-control FETs |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
|
Use Scenario: Secondary overvoltage protection in multi-cell Li-ion battery modules where primary protection resides in the fuel gauge or charger IC. IC Role / Device Role / Timing Role: Second-level OVP monitor that independently verifies each cell voltage and triggers fuse blow via OUT after 6.5 s delay upon detecting >4.50 V. Use Value: Prevents thermal runaway by enforcing strict 4.50 V/cell limit with ±10 mV accuracy - critical for safety-certified portable computing platforms. |
Use Scenario: Enabling always-on real-time clock and firmware wake-up logic during deep sleep modes without draining battery capacity. IC Role / Device Role / Timing Role: Regulated 3.0 V supply source (REG pin) that remains active until any cell drops below 2.5 V for 6 s, then self-disables. Use Value: Delivers stable 3.0 V at up to 2 mA with only 1.2 µA quiescent draw when disabled - extends ultrabook standby time beyond 30 days. |
| Medical Portable Devices | UPS Battery Backup Systems |
|
Use Scenario: Ensuring fail-safe battery disconnect in Class II medical equipment where continuous monitoring and predictable fault response are mandated. IC Role / Device Role / Timing Role: Independent cell-level OVP detector with deterministic 6.5 s delay and CMOS-active-high OUT signal for controlled fuse activation. Use Value: Meets IEC 62368-1 requirement for redundant overvoltage protection with verified timing margin and ±10 mV threshold accuracy. |
Use Scenario: Maintaining auxiliary power to microcontroller and communication interfaces during AC mains failure in line-interactive UPS units. IC Role / Device Role / Timing Role: Regulated 3.0 V supply (REG) powering MCU reset circuitry and RS-232/USB transceivers during brownout conditions. Use Value: Provides 2 mA regulated output with <100 nA per-cell leakage - avoids false undervoltage trips caused by sensor loading in long-string battery banks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296224DSGR | Same 4.50 V OVP, 6.5 s delay, and 3.0 V REG output; differs only in undervoltage threshold (2.5 V vs. BQ296215DSGR's 2.5 V - identical) | No functional difference; both support identical 2–4 series Li-ion stacks and RTC power delivery | Select BQ296215DSGR when documented 2.5 V UV threshold and 6.5 s OVP delay are required per design spec; BQ296224DSGR is functionally interchangeable |
| BQ296222DSGR | Shares same package and pinout; differs in OVP delay (6.5 s) and REG voltage (3.0 V), but UV threshold is 3.0 V (not 2.5 V) | Higher UV threshold delays REG disable - suitable for applications requiring extended RTC runtime at lower cell voltages | Choose BQ296222DSGR only if system requires 3.0 V undervoltage threshold; BQ296215DSGR is preferred for standard 2.5 V Li-ion cutoff compliance |
Compared with BQ296215DSGR, BQ296224DSGR offers identical electrical behavior and can be used without layout changes, whereas BQ296222DSGR introduces a higher 3.0 V undervoltage threshold that alters REG disable timing - requiring validation of downstream circuit hold-up time.
Availability
BQ296215DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management subsystems, and medical portable device designs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BQ296215DSGR 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 power solutions.
The BQ296xxx product line is designed specifically for second-level overvoltage protection and regulated auxiliary supply in multi-cell Li-ion battery packs - targeting safety-critical portable and industrial energy storage applications.
FAQ
What is the factory-programmed overvoltage threshold for BQ296215DSGR?
The BQ296215DSGR has a factory-programmed overvoltage threshold of exactly 4.50 V, with ±10 mV accuracy at 25°C and ±54 mV maximum deviation across –40°C to +110°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally - ensuring consistent, repeatable cell-level overcharge protection without calibration overhead in BQ296215DSGR-based designs.
How does the regulated output (REG) of BQ296215DSGR behave during battery discharge?
The BQ296215DSGR's REG pin delivers a stable 3.0 V output up to 2 mA, but automatically disables when any monitored cell voltage falls below the factory-set 2.5 V undervoltage threshold for 6 seconds. Once disabled, REG remains off until all cells exceed 2.5 V + 300 mV hysteresis. This behavior prevents excessive discharge while maintaining compatibility with RTCs and low-power supervisors in BQ296215DSGR-equipped battery packs.
What is the purpose of the fixed 6.5-second delay timer in BQ296215DSGR?
The fixed 6.5-second delay timer in BQ296215DSGR initiates upon detection of any cell exceeding 4.50 V and gates the assertion of the active-high OUT signal. This deterministic delay allows time for transient overvoltage events to settle and coordinates fuse-blow timing with charger IC responses - ensuring robust, non-latching fault handling in BQ296215DSGR-based battery protection circuits without software intervention.
Can BQ296215DSGR be used in a 2-cell Li-ion configuration?
Yes, BQ296215DSGR supports 2-, 3-, and 4-series Li-ion configurations. In a 2-cell setup, V3 and V4 pins must be shorted to V2 per TI's design guidelines; the device automatically ignores unused sense inputs. All core functions - including 4.50 V OVP, 6.5 s delay, 3.0 V REG output, and self-disable - remain fully operational in BQ296215DSGR 2-cell implementations without modification.
What package type and thermal characteristics does BQ296215DSGR use?
BQ296215DSGR uses an 8-pin WSON package (2.00 mm × 2.00 mm) with an exposed thermal pad connected to VSS. Its junction-to-board thermal resistance (RθJB) is 32.5°C/W, enabling reliable operation at up to +110°C ambient when properly mounted on a 2-layer PCB with adequate copper pour - critical for compact, high-power-density battery pack layouts using BQ296215DSGR.
BQ296215DSGR 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)
BQ296215DSGR FAQ
1.How can I place an order for BQ296215DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296215DSGR 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 BQ296215DSGR reliable?
The price and inventory of BQ296215DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296215DSGR is usually 5 days.
3.What payment methods are accepted for BQ296215DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296215DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296215DSGR?
BQ296215DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296215DSGR 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 BQ296215DSGR?
For technical support, including BQ296215DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296215DSGR requirements.
6.How does Aetrix verify that BQ296215DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296215DSGR 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 BQ296215DSGR meets industry standards.
7.What is the process for return or replacement of BQ296215DSGR?
All BQ296215DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296215DSGR, 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 BQ296215DSGR part is unused and in its original packaging.
Return procedure for BQ296215DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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