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Texas Instruments BQ296212DSGT
- Part No.:
- BQ296212DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296212DSGT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
BQ296212DSGT 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, 3-second fixed delay timer, ±10 mV OVP accuracy, active-high OUT signal, and 3.3 V regulated output supply delivering up to 2 mA. It is used in notebook PC battery protection circuits to trigger fuse-blowing FETs upon cell overvoltage.
For engineers reviewing the BQ296212DSGT datasheet, BQ296212DSGT pinout, BQ296212DSGT application, or BQ296212DSGT equivalent, key selection criteria include OVP threshold tolerance, regulated output voltage stability under load, self-disable behavior during cell undervoltage, thermal performance in WSON-8 package, and compatibility with 2–4 cell stack topologies.
Technical Context
The BQ296212DSGT implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.50 V OVP threshold with ±10 mV accuracy at 25°C and ≤±54 mV drift over –40°C to +110°C. An internal 3-second fixed-delay timer initiates upon any cell exceeding VOV and drives the CMOS-active-high OUT pin to assert fault signaling.
It integrates a 3.3 V regulated output (REG) with 2 mA max current, ±0.066 V load regulation (0–2 mA), and self-disable functionality triggered when any cell voltage falls below the factory-set 2.5 V undervoltage threshold for ≥6 seconds. The device draws only 4 µA typical supply current with REG enabled and 1.2 µA with REG disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | Factory-programmed 4.50 V ±10 mV at 25°C; ensures precise cell-level overvoltage cutoff before electrolyte decomposition. |
| OVP Delay Timer | Fixed 3 s delay; provides controlled response window to avoid false triggers from transient spikes while enabling reliable fault latching. |
| Regulated Output | 3.3 V ±0.066 V from 0–2 mA load; powers always-on RTC or supervisor ICs without external LDO. |
| Supply Current | 4 µA typical with REG on, 1.2 µA with REG off; enables multi-year battery pack shelf life without significant drain. |
| Cell Input Leakage | <100 nA per Vx pin; minimizes measurement error and prevents cell imbalance during long-term storage. |
| Operating Temp | –40°C to +110°C ambient; supports operation in high-temp battery enclosures and automotive cabin environments. |
| Package | 8-pin WSON (2.0 mm × 2.0 mm); enables compact placement adjacent to cell sense points with low thermal resistance (RθJB = 32.5°C/W). |
Pinout & Package
Package: 8-pin WSON (2.00 mm × 2.00 mm), exposed thermal pad (PWPD) recommended to be connected to VSS for optimal thermal performance and ESD robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20 V); 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 pin damage. |
| V1 | Cell 1 sense input | Sense positive terminal of bottom cell (V1–VSS); requires 1 kΩ/0.1 µF RC filter per TI layout guidelines. |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); identical filtering as V1; unused pins shorted to adjacent lower pin. |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); supports 3- and 4-series configurations; same RC filter requirements. |
| V4 | Cell 4 sense input | Sense positive terminal of top cell (V4–V3); enables full 4-series monitoring; omitted in 2- or 3-series designs. |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground; logic-high = OVP fault asserted after 3 s delay. |
| REG | Regulated supply output | 3.3 V, 2 mA max; powers external RTC or supervisor; self-disables if any cell < 2.5 V for ≥6 s; requires 0.47 µF ceramic cap. |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell OVP monitoring | Independent voltage sensing on V1–VSS, V2–V1, V3–V2, V4–V3 enables accurate detection of single-cell overvoltage in stacked configurations. |
| Factory-trimmed OVP accuracy | ±10 mV tolerance at 25°C ensures compliance with Li-ion safe charging limits without system-level calibration. |
| Self-disabling REG output | Automatically disables 3.3 V supply when any cell drops below 2.5 V for 6 s, preventing deep discharge and preserving battery health. |
| Ultra-low quiescent current | 4 µA (REG on) / 1.2 µA (REG off) extends battery pack shelf life and reduces standby power loss in always-connected systems. |
| Customer Test Mode (CTM) | Enables accelerated validation of OVP delay timing using >10 V VDD–V4 differential, reducing production test time without compromising reliability. |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
|
Use Scenario: Integrated into multi-cell Li-ion battery packs to prevent overcharging during AC adapter charging or USB-C PD fast charging. IC Role / Device Role / Timing Role: Second-level hardware OVP protector that monitors each cell independently and asserts active-high OUT after 3 s to trigger fuse blow via external NMOS. Use Value: Prevents thermal runaway by enforcing strict 4.50 V/cell limit with ±10 mV accuracy, eliminating reliance on host MCU-based software protection alone. |
Use Scenario: Embedded in slim-profile ultrabook battery modules where space constraints demand minimal footprint and ultra-low power consumption. IC Role / Device Role / Timing Role: Provides regulated 3.3 V supply to real-time clock and fuel gauge ICs while self-disabling during deep discharge to preserve remaining capacity. Use Value: Enables 2 mm × 2 mm WSON package integration and 1.2 µA shutdown current, extending shelf life beyond 5 years without maintenance. |
| Medical Portable Devices | UPS Battery Backup Systems |
|
Use Scenario: Used in certified medical-grade portable monitors and infusion pumps requiring fail-safe battery protection meeting IEC 62368-1. IC Role / Device Role / Timing Role: Hardware-enforced OVP layer operating independently of application firmware; OUT signal directly controls safety-critical disconnect FETs. Use Value: Delivers ±10 mV OVP accuracy and –40°C to +110°C operation to ensure reliability across clinical environments and transport conditions. |
Use Scenario: Deployed in enterprise UPS battery cartridges to protect against overvoltage during grid-sourced charging or generator operation. IC Role / Device Role / Timing Role: Monitors 4-series Li-ion stacks and asserts fault signal to main controller via OUT pin; REG powers backup supervisor circuitry. Use Value: Supports 20 V absolute max VDD rating and 32.5°C/W junction-to-board thermal resistance for stable operation in sealed, convection-limited enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296213DSGT | Same 8-pin WSON package and 3.3 V REG output, but factory-programmed for 4.35 V OVP threshold and 3 s delay. | Targeted at lower-voltage Li-ion chemistries (e.g., LFP blends) requiring tighter OVP margin; not suitable for standard 4.2 V/cell NMC. | Select BQ296213DSGT only when system-level validation confirms 4.35 V OVP meets cell safety requirements and charge termination profile. |
| BQ296223DSGT | Identical package and REG output, but configured for 4.50 V OVP threshold with 6.5 s delay instead of 3 s. | Used where longer fault confirmation window is needed to reject transient spikes (e.g., high-noise industrial chargers), increasing risk of overcharge exposure. | Choose BQ296223DSGT only if application environment exhibits frequent >100 ms voltage transients and system timing budget allows extended delay. |
Compared with BQ296212DSGT, BQ296213DSGT offers lower OVP threshold for conservative chemistries but sacrifices margin for standard NMC, while BQ296223DSGT trades faster fault response for improved noise immunity-neither is pin-compatible drop-in replacement due to factory-programmed parameter differences.
Availability
BQ296212DSGT 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 with guaranteed long-term manufacturability.
Supply support for BQ296212DSGT 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 experience in battery management IC design and high-volume automotive/industrial manufacturing.
The BQ296xxx product line is engineered specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, emphasizing precision sensing, ultra-low power, integrated regulated supply, and robust fault signaling for safety-critical energy storage systems.
FAQ
What is the factory-programmed overvoltage threshold and delay time for BQ296212DSGT?
The BQ296212DSGT is factory-programmed with a 4.50 V overvoltage protection (OVP) threshold and a fixed 3-second delay timer. This configuration is confirmed in Table 4-2 of the official datasheet and applies exclusively to this orderable part number-not to other variants in the BQ2962 family. The OVP accuracy is ±10 mV at 25°C, supporting strict adherence to Li-ion cell safety limits.
Does BQ296212DSGT provide a regulated output, and what is its voltage and current capability?
Yes, BQ296212DSGT provides a factory-programmed 3.3 V regulated output (REG pin) capable of delivering up to 2 mA continuous current. Load regulation is ±0.066 V from 0 to 2 mA, and it includes self-disable functionality that turns off the REG output when any monitored cell voltage falls below 2.5 V for ≥6 seconds-preventing excessive discharge in low-voltage conditions.
What package type and thermal characteristics does BQ296212DSGT use?
BQ296212DSGT uses an 8-pin WSON package measuring 2.00 mm × 2.00 mm with an exposed thermal pad (PWPD). Its thermal metrics include RθJB = 32.5°C/W (junction-to-board) and RθJA = 62°C/W (junction-to-ambient), enabling reliable operation up to +110°C ambient in compact battery pack layouts when mounted per TI's recommended PCB copper pour guidelines.
How does the OUT pin function on BQ296212DSGT, and what drive strength does it provide?
The OUT pin on BQ296212DSGT is a CMOS active-high output that transitions to logic-high after the 3-second OVP delay when any cell exceeds 4.50 V. It sources up to 4.5 mA (typical) and can drive the gate of an external NMOS FET directly. When inactive, it remains at logic-low (near VSS); no pull-down resistor is required due to its CMOS structure.
Can BQ296212DSGT be used in 2-series, 3-series, and 4-series battery configurations?
Yes, BQ296212DSGT supports 2-, 3-, and 4-series Li-ion configurations. For 2-series, only V1 and V2 pins are used (V3 and V4 shorted to V2); for 3-series, V1–V3 are used (V4 shorted to V3); for 4-series, all four sense inputs are connected. The device automatically adapts monitoring scope based on connected pins and ignores unused inputs per TI's application guidance.
BQ296212DSGT 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)
BQ296212DSGT FAQ
1.How can I place an order for BQ296212DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296212DSGT 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 BQ296212DSGT reliable?
The price and inventory of BQ296212DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296212DSGT is usually 5 days.
3.What payment methods are accepted for BQ296212DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296212DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296212DSGT?
BQ296212DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296212DSGT 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 BQ296212DSGT?
For technical support, including BQ296212DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296212DSGT requirements.
6.How does Aetrix verify that BQ296212DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296212DSGT 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 BQ296212DSGT meets industry standards.
7.What is the process for return or replacement of BQ296212DSGT?
All BQ296212DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296212DSGT, 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 BQ296212DSGT part is unused and in its original packaging.
Return procedure for BQ296212DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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