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Texas Instruments BQ296227DSGR
- Part No.:
- BQ296227DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296227DSGR.pdf
- Description:
- NANOPOWER SUPERVISOR WITH PROGRA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BQ296227DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protection IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.55V OVP threshold, 6.5s fixed delay timer, ±10mV OVP accuracy, 3.3V regulated output (2mA max), and 8-pin WSON (2mm × 2mm) package. It serves as second-level cell voltage monitor and fault signal generator in notebook PC battery management systems.
For engineers reviewing the BQ296227DSGR datasheet, BQ296227DSGR pinout, BQ296227DSGR application, or BQ296227DSGR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to BQ296227DSGR - not generic BQ2962 family behavior.
Technical Context
The BQ296227DSGR independently monitors each cell voltage (V1–VSS through V4–V3) using precision analog comparators referenced to a factory-trimmed 4.55V overvoltage threshold with 300mV hysteresis. Upon detection, it initiates a fixed 6.5s internal delay before asserting active-high OUT to trigger external FET-based fuse blow circuitry.
Its integrated 3.3V regulated output (REG) delivers up to 2mA while self-disabling when any cell drops below the factory-set 2.8V undervoltage threshold - with 6s disable delay and 300mV hysteresis - preventing battery drain during deep discharge. Input leakage per cell sense pin remains <100nA across –40°C to +110°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.55V ±10mV at 25°C; ensures precise cell voltage clamp before thermal runaway risk in 4S Li-ion stacks |
| OVP Delay Timer | 6.5s fixed (±20%); provides deterministic fault response window for fuse activation without premature triggering |
| Regulated Output | 3.3V ±30mV @ 0–2mA load; powers RTC or low-power microcontrollers without external LDO |
| Supply Current | 4µA typical with REG enabled; enables >1-year shelf life in battery-backed systems |
| Cell Input Leakage | <100nA per Vx pin; minimizes parasitic discharge in multi-cell packs during storage |
| Operating Temp | –40°C to +110°C; supports automotive cabin and industrial UPS environments |
| Package | 8-pin WSON (2mm × 2mm); enables compact placement on battery pack PCBs with minimal footprint |
Pinout & Package
8-pin WSON package (2.00mm × 2.00mm) with exposed thermal pad connected to VSS per TI layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); 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 bottom cell (V1–VSS); requires 1kΩ/0.1µF RC filter per TI spec |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); identical filtering and layout rules as V1 |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); unused pins in 2S/3S configs must be shorted to adjacent Vx |
| V4 | Cell 4 sense input | Sense positive terminal of top cell (V4–V3); required only in 4S configurations |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground upon OVP confirmation |
| REG | Regulated supply output | 3.3V output (2mA max); requires 0.47µF ceramic cap near pin; self-disables if any cell <2.8V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.55V threshold with ±10mV accuracy eliminates external resistor network and calibration effort |
| Fixed 6.5s OVP delay | Deterministic timing avoids false triggers from transient spikes while ensuring reliable fuse activation |
| Self-disabling 3.3V REG | Automatically shuts down when any cell falls below 2.8V, preserving battery capacity during storage |
| Ultra-low 4µA quiescent current | Extends battery shelf life beyond 12 months in always-connected applications like medical backup |
| 8-pin WSON footprint | 2mm × 2mm body enables high-density layout on space-constrained battery pack PCBs |
Applications
| Ultrabook Battery Protection | Notebook PC Secondary Protection |
|---|---|
Use Scenario: Monitors 3-series Li-ion cells in thin-and-light ultrabooks where primary protection resides in fuel gauge IC. IC Role / Device Role / Timing Role: Second-level overvoltage protector; asserts active-high OUT after 6.5s delay to trigger fuse blow via external NMOS. Use Value: Prevents catastrophic cell failure when primary protection fails or charger malfunctions, meeting UL 2054 requirements. |
Use Scenario: Integrated into OEM notebook battery packs requiring redundant OVP independent of system-side controllers. IC Role / Device Role / Timing Role: Standalone analog OVP monitor with factory-set 4.55V threshold and 6.5s delay; drives dedicated fuse control path. Use Value: Eliminates need for microcontroller-based monitoring, reducing BOM cost and firmware validation burden. |
| Medical Portable Device Backup | UPS Battery Management |
Use Scenario: Secures sealed Li-ion backup power in portable diagnostic equipment operating in clinical environments. IC Role / Device Role / Timing Role: Cell-level voltage supervisor; supplies 3.3V regulated power to RTC and SRAM while disabling output below 2.8V per cell. Use Value: Ensures data retention during brownout and prevents deep discharge damage during infrequent use. |
Use Scenario: Embedded in enterprise-grade UPS battery modules where long-term reliability and zero-maintenance operation are critical. IC Role / Device Role / Timing Role: Fault-detection engine with 4.55V OVP and self-regulating 3.3V supply for monitoring MCU. Use Value: Enables fail-safe shutdown before thermal runaway, supporting IEC 62040-3 compliance for uninterruptible power systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296223DSGR | Same 4.55V OVP, 6.5s delay, 3.3V REG, but UV threshold = 2.5V (vs. 2.8V) | Lower undervoltage cutoff increases risk of deep discharge in medical devices requiring strict 2.8V minimum | Select only if system tolerates earlier REG disable and deeper discharge cycles |
| BQ296231DSGR | Higher 4.60V OVP threshold, same 6.5s delay and 3.3V REG, UV = 2.5V | Less margin before cell degradation in high-voltage Li-ion chemistries (e.g., NMC 4.45V nominal) | Prefer for applications using higher-capacity cells where 4.55V is insufficient safety margin |
Compared with BQ296227DSGR, BQ296223DSGR offers identical timing and regulation but reduces undervoltage protection by 0.3V - compromising battery longevity - while BQ296231DSGR raises OVP by 50mV to accommodate newer high-voltage cells but retains the same lower UV threshold.
Availability
BQ296227DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook secondary protection circuits, and medical portable device backup systems requiring stable component supply, long-lifecycle assurance, and TI-qualified production traceability.
Supply support for BQ296227DSGR 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 and embedded processing solutions, with over 50 years of battery management innovation and ISO 9001-certified manufacturing.
The BQ296xxx product line targets high-reliability Li-ion battery pack protection, emphasizing precision analog sensing, ultra-low power operation, and integrated regulated supply - specifically engineered for notebook, medical, and UPS applications demanding fail-safe voltage supervision.
FAQ
What is the exact overvoltage protection threshold and accuracy of BQ296227DSGR?
The BQ296227DSGR has a factory-programmed overvoltage protection threshold of 4.55V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This value is laser-trimmed during production and cannot be adjusted externally. The BQ296227DSGR uses this fixed threshold to detect overvoltage on any individual cell in 2–4 series Li-ion stacks, triggering the 6.5s delay timer before asserting the active-high OUT signal.
Does BQ296227DSGR support 2-cell, 3-cell, and 4-cell battery configurations?
Yes, BQ296227DSGR supports 2-series, 3-series, and 4-series Li-ion battery configurations. It monitors differential voltages across V1–VSS, V2–V1, V3–V2, and V4–V3. For 2S or 3S stacks, unused Vx pins (e.g., V4 in 3S) must be shorted to the adjacent lower pin (V3) as specified in the TI datasheet. All configurations retain the same 4.55V OVP threshold, 6.5s delay, and 3.3V REG output.
What is the function and specification of the REG pin on BQ296227DSGR?
The REG pin on BQ296227DSGR provides a factory-set 3.3V regulated output capable of sourcing up to 2mA. It includes overcurrent limiting (4mA short-circuit limit) and self-disable functionality: if any monitored cell voltage falls below the 2.8V undervoltage threshold for 6s, REG shuts off to prevent battery drain. A 0.47µF ceramic capacitor is required between REG and VSS for stability, placed adjacent to the pins per TI layout guidance.
How does the OUT pin behave during overvoltage detection on BQ296227DSGR?
The OUT pin on BQ296227DSGR is a CMOS active-high output. When any cell exceeds 4.55V, the internal 6.5s timer starts; upon expiration, OUT transitions from low to high (VDD-rail level) with 4.5mA source capability. This signal directly drives the gate of an external NMOS FET to short the fuse to ground, enabling battery/charger current to blow the fuse. OUT remains high until all cells fall below 4.25V (4.55V – 300mV hysteresis).
What package type and thermal characteristics apply to BQ296227DSGR?
BQ296227DSGR uses an 8-pin WSON package (2.00mm × 2.00mm) with exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 32.5°C/W, and junction-to-ambient (RθJA) is 62°C/W. TI recommends connecting the exposed pad to VSS on the PCB for optimal thermal performance and ESD robustness. The package supports reflow soldering per JEDEC J-STD-020, with peak temperature ≤260°C.
BQ296227DSGR 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)
BQ296227DSGR FAQ
1.How can I place an order for BQ296227DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296227DSGR 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 BQ296227DSGR reliable?
The price and inventory of BQ296227DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296227DSGR is usually 5 days.
3.What payment methods are accepted for BQ296227DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296227DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296227DSGR?
BQ296227DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296227DSGR 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 BQ296227DSGR?
For technical support, including BQ296227DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296227DSGR requirements.
6.How does Aetrix verify that BQ296227DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296227DSGR 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 BQ296227DSGR meets industry standards.
7.What is the process for return or replacement of BQ296227DSGR?
All BQ296227DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296227DSGR, 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 BQ296227DSGR part is unused and in its original packaging.
Return procedure for BQ296227DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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