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Texas Instruments BQ296216DSGT
- Part No.:
- BQ296216DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296216DSGT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:990
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Product details
Overview
BQ296216DSGT 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, 3.0V regulated output (2mA max), and 8-pin WSON (2mm × 2mm) package. It monitors each cell independently and drives an external NMOS FET to blow the fuse during overvoltage faults in notebook PC battery packs.
For engineers reviewing the BQ296216DSGT datasheet, BQ296216DSGT pinout, BQ296216DSGT application, or BQ296216DSGT 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 BMS safety-critical design validation and second-level protection architecture.
Technical Context
The BQ296216DSGT implements independent per-cell voltage monitoring using precision analog comparators referenced to a factory-trimmed 4.55V OVP threshold with 300mV hysteresis. Upon detection of any cell exceeding VOV, a non-adjustable 6.5s internal delay timer initiates before asserting the active-high OUT signal to trigger external FET-based fuse blowing.
Its integrated 3.0V regulated supply delivers up to 2mA and features self-disable when any cell falls below the factory-set 2.5V undervoltage threshold (VUVREG), with 6s UV detection delay and 300mV hysteresis. The device operates across –40°C to +110°C with supply current as low as 1.2µA when REG is disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.55V ±10mV at 25°C; enables precise cell-level overvoltage cutoff without external calibration |
| OVP Delay Timer | 6.5s fixed internal delay; ensures transient spikes do not falsely trigger fuse blow while allowing safe response to sustained overvoltage |
| Regulated Output | 3.0V ±30mV at 0–2mA load; powers RTC or always-on circuits with built-in short-circuit current limiting (4mA) |
| Supply Current | ~4µA with REG enabled, ~1.2µA with REG disabled; minimizes battery drain during standby and deep discharge |
| Cell Input Leakage | <100nA per Vx pin; preserves cell voltage integrity and prevents measurement drift in high-impedance battery stacks |
| Operating Temp | –40°C to +110°C ambient; supports industrial and automotive-grade battery pack environments |
| UV Threshold | 2.5V ±50mV with 6s delay and 300mV hysteresis; disables REG output to prevent deep discharge damage to Li-ion cells |
Pinout & Package
Package: 8-pin WSON (2.00mm × 2.00mm), exposed thermal pad (PWPD) recommended to be connected to VSS on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Analog input | Sense voltage of lowest cell (V1–VSS); must be connected first during cell attachment to avoid REG damage |
| V2 | Analog input | Sense voltage of second cell (V2–V1); unused pins for 2- or 3-series stacks are shorted to adjacent lower pin |
| V3 | Analog input | Sense voltage of third cell (V3–V2); supports full 4-series monitoring when all Vx pins used |
| V4 | Analog input | Sense voltage of top cell (V4–V3); enables complete stack coverage for 4-cell configurations |
| VDD | Power input | Unregulated supply input (3–20V); requires RC filter for noise immunity and must be ≥10V above V4 in test mode |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; must be connected before any other pin to prevent latch-up |
| OUT | Digital output | Active-high CMOS fault signal; drives external NMOS gate to short fuse to ground during OVP event |
| REG | Regulated output | 3.0V supply (0–2mA); requires 0.47µF ceramic capacitor to VSS; self-disables if any cell <2.5V for 6s |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell OVP monitoring | Independent sensing of V1–VSS, V2–V1, V3–V2, V4–V3 enables accurate fault isolation in multi-cell stacks |
| Factory-programmed OVP | 4.55V threshold with ±10mV accuracy eliminates need for external resistor dividers or trimming |
| Self-disabling REG output | Automatically shuts down 3.0V supply when any cell drops below 2.5V, preventing battery over-discharge |
| Low quiescent current | 1.2µA ICC with REG disabled extends shelf life and reduces parasitic drain in storage mode |
| Customer Test Mode (CTM) | Enables accelerated OVP delay verification (>10ms but shorter than 6.5s) by applying VDD ≥ V4 +10V |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
|
Use Scenario: Secondary overvoltage protection layer in slim-profile Li-ion battery packs where primary protection resides in the fuel gauge or charger IC. IC Role / Device Role / Timing Role: Monitors each cell independently; asserts active-high OUT after 6.5s delay to trigger NMOS-driven fuse blow upon 4.55V violation. Use Value: Prevents thermal runaway by enforcing strict 4.55V/cell limit with ±10mV accuracy, even under temperature variation (–40°C to +110°C). |
Use Scenario: Enabling always-on RTC and system wake-up circuitry during battery-only operation without draining protected cells. IC Role / Device Role / Timing Role: Delivers stable 3.0V/2mA regulated supply from battery stack; self-disables within 6s if any cell falls below 2.5V. Use Value: Eliminates need for separate LDO while ensuring zero risk of deep discharge - critical for ultrabook sleep/resume reliability. |
| Medical Portable Devices | UPS Battery Backup Systems |
|
Use Scenario: Safety-critical secondary protection in certified medical battery packs requiring redundant OVP and traceable shutdown behavior. IC Role / Device Role / Timing Role: Provides deterministic 6.5s fault response window and 300mV hysteresis to reject noise-induced false triggers during EMI-heavy operation. Use Value: Meets IEC 62133 and UL 2054 requirements for controlled, repeatable overvoltage cutoff with no software dependency. |
Use Scenario: Maintaining backup power integrity in line-interactive UPS units during extended grid outages with multi-cell Li-ion banks. IC Role / Device Role / Timing Role: Supplies 3.0V to microcontroller and communication ICs; disables output only after confirmed 2.5V/cell undervoltage for 6s. Use Value: Extends usable runtime by avoiding premature shutdown - allows full utilization of cell capacity down to 2.5V before REG disable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296221DSGT | Same 4.55V OVP, 6.5s delay, and 3.0V REG output; differs only in UV threshold (2.5V vs. 2.5V - identical) | No functional difference; both support identical 2–4-series Li-ion stacks and same pinout | Select BQ296221DSGT only if identical specs are required with alternate TI orderable code; no design change needed |
| BQ296223DSGT | 4.50V OVP threshold (50mV lower), same 6.5s delay and 3.0V REG; UV remains 2.5V | Suitable where slightly earlier overvoltage cutoff is preferred to maximize cell longevity at expense of peak charge capacity | Choose BQ296223DSGT when tighter OVP margin is acceptable; verify system-level charge termination compatibility |
Compared with BQ296216DSGT, BQ296221DSGT offers identical electrical behavior and drop-in replacement capability, while BQ296223DSGT provides a 50mV lower OVP threshold for conservative cell protection - enabling trade-offs between safety margin and usable energy.
Availability
BQ296216DSGT is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable devices requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for BQ296216DSGT 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 and embedded processing technologies, with decades of expertise in battery management solutions.
The BQ296xxx family is 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 BQ296216DSGT?
The BQ296216DSGT 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 manufacturing and does not require external components or calibration. The device uses independent analog comparators per cell input to ensure consistent detection across all four sense channels (V1–VSS through V4–V3) in the BQ296216DSGT.
How does the regulated 3.0V output behave during battery discharge in the BQ296216DSGT?
The BQ296216DSGT's REG pin delivers a stable 3.0V output (±30mV) up to 2mA, but automatically disables after a 6s delay if any monitored cell voltage falls below the factory-set 2.5V undervoltage threshold (VUVREG). Once disabled, REG remains off until all cells exceed 2.5V + 300mV hysteresis. This behavior prevents deep discharge and protects Li-ion cell health without external control logic in the BQ296216DSGT.
What is the purpose and activation condition of Customer Test Mode (CTM) in the BQ296216DSGT?
Customer Test Mode (CTM) in the BQ296216DSGT accelerates overvoltage delay verification during production testing. It activates when VDD exceeds V4 by at least 10V, reducing the OVP timer from 6.5s to >10ms but still deterministic. CTM allows rapid functional validation without waiting for full delay cycles, and exits automatically when the VDD–V4 differential drops below 10V - all while maintaining safe operation within absolute maximum ratings for the BQ296216DSGT.
Can the BQ296216DSGT be used in a 2-cell or 3-cell battery configuration?
Yes, the BQ296216DSGT supports 2-, 3-, and 4-series Li-ion configurations. For fewer cells, unused Vx pins (e.g., V4 for a 2-cell stack) must be shorted to the adjacent lower pin (V3 → V2 → V1). The device ignores differential voltages below 0.5V (VUVQUAL) during undervoltage detection, ensuring reliable operation regardless of stack size - a key design feature confirmed for the BQ296216DSGT in TI's official documentation.
What are the critical layout requirements for the BQ296216DSGT to ensure reliable operation?
Three layout rules are mandatory for the BQ296216DSGT: (1) VSS must be connected first during assembly or cell attachment to prevent REG pin damage; (2) RC filters for all Vx and VDD pins must be placed within 2mm of their respective terminals to minimize noise coupling; (3) the 0.47µF ceramic capacitor for REG must be mounted directly between REG and VSS with minimal trace length. Failure to follow these violates the BQ296216DSGT's validated design guidelines and risks false OVP triggering or regulator instability.
BQ296216DSGT 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)
BQ296216DSGT FAQ
1.How can I place an order for BQ296216DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296216DSGT 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 BQ296216DSGT reliable?
The price and inventory of BQ296216DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296216DSGT is usually 5 days.
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BQ296216DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296216DSGT 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 BQ296216DSGT?
For technical support, including BQ296216DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296216DSGT requirements.
6.How does Aetrix verify that BQ296216DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296216DSGT 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 BQ296216DSGT meets industry standards.
7.What is the process for return or replacement of BQ296216DSGT?
All BQ296216DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296216DSGT, 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 BQ296216DSGT part is unused and in its original packaging.
Return procedure for BQ296216DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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