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Texas Instruments BQ296106DSGT
- Part No.:
- BQ296106DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296106DSGT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:888
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Product details
Overview
BQ296106DSGT from Texas Instruments is a high-accuracy, low-power overvoltage protection IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.45V OVP threshold, 6.5s fixed delay timer, ±10mV OVP accuracy, 3.3V 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 packs.
For engineers reviewing the BQ296106DSGT datasheet, BQ296106DSGT pinout, BQ296106DSGT application, or BQ296106DSGT equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, leakage current (<100nA/cell), and precise OVP/UV thresholds - all critical for battery pack safety validation and RTC power rail design.
Technical Context
The BQ296106DSGT implements independent per-cell voltage monitoring using precision analog comparators referenced to a factory-trimmed 4.45V OVP threshold with 300mV hysteresis. Upon detection of any cell exceeding VOV, a fixed 6.5s internal timer initiates before asserting the active-high OUT signal to trigger external fuse-blowing circuitry.
Its integrated 3.3V regulated supply delivers up to 2mA with ±3% load regulation (0–2mA), self-disables when any cell falls below 2.8V (factory-set UV threshold), and features 1.2µA quiescent current when disabled - enabling always-on RTC operation without excessive battery drain during storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.45V ±10mV at 25°C; ensures precise cell-level overvoltage cutoff before thermal runaway risk |
| OVP Delay Timer | 6.5s fixed (not adjustable); provides deterministic fault response window for fuse activation |
| Regulated Output | 3.3V ±2%, 2mA max; powers RTC or supervisor ICs without external LDO |
| Supply Current (REG on) | 4µA typical at VCELL < VPROTECT; enables multi-year shelf life in battery packs |
| Input Leakage Current | <100nA per cell input; minimizes voltage measurement error and self-discharge |
| UV Threshold | 2.8V ±50mV; triggers REG disable to prevent deep discharge damage to Li-ion cells |
| Package | 8-pin WSON, 2.00mm × 2.00mm; supports high-density battery management PCB layouts |
Pinout & Package
8-pin WSON (2mm × 2mm) package with exposed thermal pad connected to VSS. Pin numbering follows TI standard top-view orientation (pin 1 at top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); powers internal circuitry and REG LDO |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; must be connected first during assembly |
| V1–V4 | Cell voltage sense inputs | Differential inputs for 1st–4th cell in stack; support 2S–4S configurations via pin shorting |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground during OVP |
| REG | Regulated supply output | 3.3V output (2mA max); self-disables if any cell < 2.8V; requires 0.47µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell OVP monitoring | Independent sensing of V1–V4 enables accurate stack-level protection without shared reference errors |
| Factory-programmed OVP | 4.45V threshold laser-trimmed at wafer level; eliminates external resistor networks and calibration |
| Self-disabling REG output | Automatically shuts down 3.3V supply when any cell drops below 2.8V - prevents irreversible Li-ion damage |
| Ultra-low leakage inputs | <100nA per Vx pin reduces voltage divider error and extends battery shelf life |
| Customer Test Mode (CTM) | Enables 15ms OVP delay verification during production test without full 6.5s wait time |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Integrated into multi-cell Li-ion battery modules to prevent overcharging during AC adapter use or fast charging. IC Role / Device Role / Timing Role: Second-level protector that asserts OUT after 6.5s delay upon detecting ≥4.45V on any cell, triggering fuse blow via external NMOS. Use Value: Prevents thermal runaway while allowing transient voltage spikes during charge termination without false trips. |
Use Scenario: Powers real-time clock and fuel gauge during sleep mode while maintaining cell voltage integrity. IC Role / Device Role / Timing Role: Provides regulated 3.3V supply with automatic shutdown when lowest cell reaches 2.8V - halting RTC draw before deep discharge. Use Value: Extends usable battery capacity by 8–12% versus fixed-enable regulators; eliminates need for separate UV monitoring circuit. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Ensures fail-safe battery protection in Class II medical equipment where regulatory compliance mandates redundant OVP. IC Role / Device Role / Timing Role: Acts as independent hardware-based OVP layer downstream of primary charger IC, with deterministic 6.5s response. Use Value: Meets IEC 62368-1 Annex G requirements for secondary protection with verified delay timing and ±10mV accuracy. |
Use Scenario: Monitors 4-series Li-ion strings in enterprise UPS units during grid-failure backup operation. IC Role / Device Role / Timing Role: Detects individual cell overvoltage during regenerative braking or generator-sourced charging transients. Use Value: Enables safe operation at 16.8V nominal (4×4.2V) while rejecting common-mode noise via differential Vx inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296103DSGT | OVP = 4.50V (vs. 4.45V); identical 6.5s delay, 3.3V REG, and pinout | Suitable where higher OVP margin is required to accommodate charger tolerance or temperature drift | Select when system-level OVP margin must exceed 4.45V without changing layout or firmware |
| BQ296111DSGT | OVP = 4.45V (same), but UV = 2.5V (vs. 2.8V) and 4.0s delay (vs. 6.5s) | Used in cost-sensitive designs where faster fault response and lower UV threshold are acceptable | Choose only if reduced UV threshold aligns with cell chemistry and battery management firmware logic |
Compared with BQ296106DSGT, BQ296103DSGT offers tighter OVP margin for high-precision charging systems, while BQ296111DSGT trades longer fault latency and higher UV threshold for faster response - requiring revalidation of fuse blow energy and system-level UV recovery timing.
Availability
BQ296106DSGT is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management subsystems, and medical portable device battery modules requiring stable component supply across long production lifecycles.
Supply support for BQ296106DSGT 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.
The BQ296xxx family was designed specifically for second-level overvoltage protection in multi-cell Li-ion battery packs, integrating precision voltage monitoring, regulated auxiliary supply, and robust fault signaling in ultra-small WSON packages.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296106DSGT?
The BQ296106DSGT has a factory-programmed overvoltage protection threshold of 4.45V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This precision eliminates the need for external trimming components and ensures reliable cell-level protection without false trips during normal charge termination transients. The BQ296106DSGT's hysteresis is fixed at 300mV to prevent oscillation near the trip point.
How does the regulated 3.3V output of the BQ296106DSGT behave under low-cell-voltage conditions?
The BQ296106DSGT's REG output automatically disables when any monitored cell voltage falls below its factory-set undervoltage threshold of 2.8V, with a 6s delay before shutdown. Once disabled, REG remains off until all cells rise above 2.85V (2.8V + 50mV hysteresis). This behavior protects Li-ion cells from deep discharge damage and is intrinsic to the BQ296106DSGT - no external control signals are required.
Can the BQ296106DSGT be used in both 2-series and 4-series battery configurations?
Yes, the BQ296106DSGT supports 2S, 3S, and 4S Li-ion stacks via pin-strapping: unused Vx pins (e.g., V3/V4 in a 2S pack) are shorted to the adjacent lower pin (V2/V3). The device ignores voltages below 0.5V on unused inputs and maintains full OVP accuracy across all configurations. This flexibility allows single-BOM deployment across multiple battery platforms using the same BQ296106DSGT.
What is the purpose of the Customer Test Mode (CTM) in the BQ296106DSGT?
The BQ296106DSGT's Customer Test Mode reduces production test time by shortening the OVP delay from 6.5s to 15ms when VDD exceeds V4 by ≥10V. This allows functional verification of the fault path (OUT assertion and FET drive) without waiting for full delay timing. CTM is entered automatically during test and requires no configuration bits - it is a built-in feature of the BQ296106DSGT silicon.
Does the BQ296106DSGT require external passive components for basic operation?
Yes, the BQ296106DSGT requires four 1kΩ/0.1µF RC filters (one per Vx pin), a 0.47µF ceramic capacitor on REG, and a 0.1µF capacitor on VDD. These components ensure stable voltage sensing, noise immunity, and REG output stability. The BQ296106DSGT datasheet specifies RIN = 1kΩ as the calibration reference - deviating impacts OVP accuracy and must be accounted for in design validation.
BQ296106DSGT 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)
BQ296106DSGT FAQ
1.How can I place an order for BQ296106DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296106DSGT 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 BQ296106DSGT reliable?
The price and inventory of BQ296106DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296106DSGT is usually 5 days.
3.What payment methods are accepted for BQ296106DSGT?
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BQ296106DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296106DSGT 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 BQ296106DSGT?
For technical support, including BQ296106DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296106DSGT requirements.
6.How does Aetrix verify that BQ296106DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296106DSGT 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 BQ296106DSGT meets industry standards.
7.What is the process for return or replacement of BQ296106DSGT?
All BQ296106DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296106DSGT, 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 BQ296106DSGT part is unused and in its original packaging.
Return procedure for BQ296106DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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