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Texas Instruments BQ296113DSGT
- Part No.:
- BQ296113DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296113DSGT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:295
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Product details
Overview
BQ296113DSGT from Texas Instruments is a high-accuracy, low-power overvoltage protection IC for 2–4-series Li-ion battery packs, featuring factory-programmed 4.35V OVP threshold, 3-second 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 BQ296113DSGT datasheet, BQ296113DSGT pinout, BQ296113DSGT application, or BQ296113DSGT equivalent, key selection criteria include OVP threshold tolerance, regulated output stability under load, self-disable behavior during cell undervoltage, and compatibility with NMOS FET-based fuse-blowing circuits in multi-cell pack designs.
Technical Context
The BQ296113DSGT independently monitors each cell voltage (V1–VSS to V4–V3) using precision analog comparators referenced to a factory-trimmed 4.35V threshold with 300mV hysteresis. Upon detection of any cell exceeding 4.35V, it initiates a fixed 3-second internal delay before asserting the active-high OUT signal to drive an external NMOS FET.
Its integrated 3.3V regulator delivers up to 2mA with ±30mV load regulation (0–2mA), self-disables when any cell falls below 2.5V (factory-set UV threshold), and draws only 1.2µA quiescent current when disabled - enabling always-on RTC support without significant battery drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.35V ±10mV at 25°C; ensures precise cell overvoltage cutoff before thermal runaway risk |
| OVP Delay Timer | 3.0s ±0.6s; provides deterministic fault response window before fuse activation |
| Regulated Output | 3.3V ±30mV (0–2mA load); powers real-time clock or low-power supervisor ICs directly |
| Supply Current (REG on) | 4–6µA typical; enables multi-year battery shelf life in standby mode |
| Supply Current (REG off) | 1–2µA typical; reduces leakage during deep discharge or storage |
| Cell Input Leakage | <100nA per sense pin; prevents cell imbalance and measurement error in high-impedance stacks |
| Operating Temp Range | –40°C to +110°C; supports operation in laptop battery packs under full thermal stress |
Pinout & Package
Package: 8-pin WSON (2.00mm × 2.00mm), thermally enhanced with exposed pad connected to VSS.
| 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 voltage across lowest cell (V1–VSS); requires 1kΩ/0.1µF RC filter |
| V2 | Cell 2 sense input | Sense voltage across second cell (V2–V1); identical filtering requirements as V1 |
| V3 | Cell 3 sense input | Sense voltage across third cell (V3–V2); used in 3- and 4-series configurations |
| V4 | Cell 4 sense input | Sense voltage across fourth cell (V4–V3); left floating or tied to V3 in 2- or 3-series stacks |
| OUT | Fault signal output | CMOS active-high output; drives gate of NMOS FET to short fuse to ground during OVP event |
| REG | Regulated supply output | 3.3V output (2mA max); requires 0.47µF ceramic capacitor to VSS for stability and ESD robustness |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.35V threshold with ±10mV accuracy eliminates external resistor network and calibration effort |
| Fixed 3-second OVP delay | Deterministic timing avoids false trips from transient spikes while allowing safe charge termination |
| Self-disabling 3.3V regulator | Automatically shuts down when any cell drops below 2.5V, preventing deep discharge damage to cells |
| Ultra-low quiescent current | 1.2µA with REG disabled enables >10-year shelf life in battery-backed applications |
| Low-input-leakage sensing | <100nA per cell input preserves cell balance and extends pack runtime in high-impedance monitoring paths |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Integrated into 3-cell Li-ion battery packs for premium laptops requiring dual-level OVP and RTC power. IC Role / Device Role / Timing Role: Second-level protector that triggers fuse blow after 3s delay upon cell voltage >4.35V; supplies stable 3.3V to RTC during sleep mode. Use Value: Prevents thermal runaway while maintaining timekeeping without separate LDO, reducing BOM count and PCB area. |
Use Scenario: Used in slim ultrabooks where space-constrained battery modules demand minimal footprint and ultra-low leakage. IC Role / Device Role / Timing Role: Monitors all cells independently; asserts OUT to cut power path if any cell exceeds 4.35V; powers always-on system wake logic via REG output. Use Value: Enables <2µA system standby current by disabling REG during deep discharge, extending usable battery capacity. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Deployed in certified medical battery packs (e.g., portable defibrillators) requiring high-reliability OVP with traceable thresholds. IC Role / Device Role / Timing Role: Provides ±10mV OVP accuracy and 300mV hysteresis to avoid nuisance trips during ECG signal acquisition transients. Use Value: Meets IEC 62368-1 safety requirements for secondary protection with documented accuracy and fail-safe shutdown behavior. |
Use Scenario: Embedded in enterprise UPS battery modules to protect 4-series Li-ion strings during AC failure and extended backup cycles. IC Role / Device Role / Timing Role: Detects overvoltage during regenerative charging or charger malfunction; uses 3.3V REG output to sustain microcontroller supervision during brownout. Use Value: Ensures uninterrupted firmware execution and state retention during grid outage by powering critical logic from battery stack directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296112DSGT | Same 4.50V OVP threshold and 3s delay, but higher OVP setpoint increases risk of premature cutoff in 4.2V nominal cells | Less suitable for 4.2V/cell chemistries; better for high-voltage LiCoO₂ variants | Select only if design targets 4.50V absolute maximum cell voltage |
| BQ296114DSGT | 4.50V OVP with 4s delay; identical 3.3V REG and package; adds 1s margin before fault assertion | Preferred where longer transient immunity is required (e.g., noisy charger environments) | Choose when system-level validation shows 3s insufficient for charge termination settling |
Compared with BQ296113DSGT, BQ296112DSGT raises OVP to 4.50V - increasing safety margin but risking premature cutoff in standard 4.2V/cell packs - while BQ296114DSGT retains same OVP but extends delay to 4s, improving noise immunity at cost of slower fault response.
Availability
BQ296113DSGT is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable device battery modules requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for BQ296113DSGT 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 over 50 years of innovation in battery safety ICs.
The BQ296xxx family was designed specifically for second-level overvoltage protection and regulated auxiliary supply in multi-cell Li-ion battery packs - targeting high-accuracy, ultra-low-power, and fail-safe operation in consumer and medical applications.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296113DSGT?
The BQ296113DSGT has a factory-programmed overvoltage protection threshold of 4.35V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This tight tolerance ensures reliable cell-level protection without external calibration, meeting stringent safety requirements for Li-ion battery packs in notebooks and medical devices. The BQ296113DSGT uses internal trimming to achieve this specification.
How does the BQ296113DSGT regulate its 3.3V output and what is its load capability?
The BQ296113DSGT delivers a regulated 3.3V output capable of supplying up to 2mA with ±30mV line/load regulation. It incorporates overcurrent protection limiting short-circuit current to 4mA and requires a 0.47µF ceramic capacitor on the REG pin for stability. The BQ296113DSGT automatically disables this output when any monitored cell voltage falls below 2.5V, preventing excessive discharge.
What is the function of the OUT pin on the BQ296113DSGT and how is it driven?
The OUT pin on the BQ296113DSGT is a CMOS active-high output that transitions to logic high after a fixed 3-second delay when any cell voltage exceeds 4.35V. It sources up to 4.5mA and is designed to directly drive the gate of an NMOS FET in series with a fuse, enabling battery pack isolation during overvoltage events. The BQ296113DSGT does not support open-drain configuration.
Does the BQ296113DSGT support 2-cell, 3-cell, and 4-cell battery configurations?
Yes, the BQ296113DSGT supports 2-series, 3-series, and 4-series Li-ion battery stacks. Unused sense pins (e.g., V4 in a 2-cell pack) are tied to the adjacent lower pin (V3), and the device ignores differential voltages below 0.5V for undervoltage qualification. All configurations use the same BQ296113DSGT pinout and require identical RC filtering on active Vx inputs.
What is the recommended PCB layout practice for the BQ296113DSGT to ensure reliability?
Texas Instruments requires VSS to be connected first during cell attachment to prevent REG pin damage from capacitor discharge. RC filters for Vx and VDD pins must be placed within 2mm of their respective terminals, and the 0.47µF REG capacitor must be mounted adjacent to REG and VSS pins. The exposed thermal pad must be soldered to a VSS copper pour for thermal performance and ESD robustness. These practices are mandatory for reliable operation of the BQ296113DSGT.
BQ296113DSGT 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)
BQ296113DSGT FAQ
1.How can I place an order for BQ296113DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296113DSGT 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 BQ296113DSGT reliable?
The price and inventory of BQ296113DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296113DSGT is usually 5 days.
3.What payment methods are accepted for BQ296113DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296113DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296113DSGT?
BQ296113DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296113DSGT 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 BQ296113DSGT?
For technical support, including BQ296113DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296113DSGT requirements.
6.How does Aetrix verify that BQ296113DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296113DSGT 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 BQ296113DSGT meets industry standards.
7.What is the process for return or replacement of BQ296113DSGT?
All BQ296113DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296113DSGT, 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 BQ296113DSGT part is unused and in its original packaging.
Return procedure for BQ296113DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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