My Inquiry
My Account
Texas Instruments BQ296231DSGT
- Part No.:
- BQ296231DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296231DSGT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ296231DSGT from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.60V 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 protection circuits.
For engineers reviewing the BQ296231DSGT datasheet, BQ296231DSGT pinout, BQ296231DSGT application, or BQ296231DSGT equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, cell-level sensing architecture, and precise alternative-part comparisons - all grounded in TI's production-grade SLUSBU5V specification.
Technical Context
The BQ296231DSGT implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.60V overvoltage threshold. Its internal fixed-delay timer (6.5s) initiates only upon detection of any cell exceeding VOV, with hysteresis of 250–400mV to prevent chatter.
It integrates a 3.3V regulated output delivering up to 2mA, self-disabled when any cell falls below the factory-configured 2.5V undervoltage threshold (VUVREG) for ≥6s. The active-high OUT pin directly drives NMOS FET gates for fuse-blowing, while leakage per sense input remains <100nA at –40°C to +110°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | Factory-programmed 4.60V ±10mV at 25°C; enables precise cell-level shutdown before thermal runaway initiation. |
| OVP Delay Timer | Fixed 6.5s delay (5.2–7.8s over temperature); provides deterministic fault response window for system-level safety arbitration. |
| Regulated Output | 3.3V ±30mV at 500µA load; powers RTC or supervisor ICs without external LDO, reducing BOM count. |
| Supply Current | 4µA typical with REG enabled; drops to 1.2µA when REG disabled - extends shelf life in stored battery packs. |
| Sense Input Leakage | <100nA per Vx pin; minimizes cell imbalance drift and preserves state-of-charge accuracy over time. |
| Operating Temperature | –40°C to +110°C ambient; supports operation in high-temp battery compartments (e.g., ultrabook chassis). |
| Package | 8-pin WSON (2.00mm × 2.00mm, 0.5mm pitch); enables compact placement adjacent to cell tabs in slim battery modules. |
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 |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); connects to top of cell 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 avoid REG damage. |
| V1 | Cell 1 sense input | Senses voltage across lowest cell (V1–VSS); requires 1kΩ/0.1µF RC filter per TI layout guidelines. |
| V2 | Cell 2 sense input | Senses voltage across second cell (V2–V1); unused pins for 2- or 3-series configs must be shorted to adjacent Vx. |
| V3 | Cell 3 sense input | Senses voltage across third cell (V3–V2); supports full 4-series monitoring when all Vx pins are used. |
| V4 | Cell 4 sense input | Senses voltage across top cell (V4–V3); enables complete stack coverage in quad-cell configurations. |
| REG | Regulated output | 3.3V supply (0–2mA); self-disables if any cell <2.5V for ≥6s; requires 0.47µF ceramic cap to VSS. |
| OUT | Fault signal output | CMOS active-high output; drives NMOS gate to short fuse to ground during OVP event. |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell overvoltage monitoring | Four independent analog inputs (V1–V4) enable true cell-level protection - not pack-level - preventing single-cell failure propagation. |
| Factory-programmed OVP threshold | 4.60V ±10mV eliminates need for external resistor dividers or calibration, ensuring consistent trip point across production lots. |
| Self-disabling regulated output | 3.3V REG shuts down automatically when any cell drops below 2.5V for 6s, eliminating parasitic drain during deep discharge or storage. |
| Low-quiescent current operation | 4µA supply current with REG active and 1.2µA with REG off - extends battery shelf life by >3× versus legacy protectors. |
| Customer Test Mode (CTM) | Enables fast validation of OVP delay timer via VDD–V4 ≥10V differential, reducing final-pack test time without compromising safety margins. |
Applications
| Notebook PC Battery Protection | Ultrabook Power Management |
|---|---|
Use Scenario: Monitors 3- or 4-cell Li-ion stacks in thin-profile notebooks where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Second-level OV protector that triggers fuse blow after 6.5s if any cell exceeds 4.60V - acting as hardware-enforced safety layer behind primary fuel gauge. Use Value: Prevents catastrophic thermal events by enforcing strict per-cell voltage limits before charger ICs or system firmware can react. |
Use Scenario: Integrated into slim ultrabook battery packs requiring always-on RTC power and zero standby current leakage. IC Role / Device Role / Timing Role: Provides 3.3V/2mA regulated supply to RTC while self-disabling during storage discharge; OUT pin signals host MCU on fault condition. Use Value: Eliminates need for separate RTC LDO and discrete OV monitor, reducing component count and PCB area by 2–3 devices. |
| Medical Portable Device Packs | UPS Battery Backup Modules |
Use Scenario: Used in certified medical battery packs (e.g., portable defibrillators, infusion pumps) requiring IEC 62133-compliant secondary protection. IC Role / Device Role / Timing Role: Independent cell-level OV detector with ±10mV accuracy and 6.5s delay - meets functional safety requirements for redundant protection layers. Use Value: Delivers traceable, production-tested OVP performance without software dependency, supporting ISO 13485 design history files. |
Use Scenario: Embedded in enterprise UPS battery modules where long-term reliability and low self-discharge are critical for standby readiness. IC Role / Device Role / Timing Role: Maintains 3.3V RTC supply during grid outage; disables REG only after sustained cell undervoltage (≥6s), avoiding false shutdowns during transient dips. Use Value: Ensures accurate timekeeping and state retention over multi-year deployments without battery replacement or recalibration. |
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 threshold, 6.5s delay, 3.3V REG; differs only in factory-programmed OVP voltage (4.55V vs. 4.60V). | Used in battery packs with tighter cell voltage tolerance; requires revalidation of OVP margin against charger termination voltage. | Select when system-level OVP margin must be reduced by 50mV for faster fault response under high-temperature charging. |
| BQ296233DSGT | Identical package, timing, and REG; factory-programmed OVP = 4.45V (150mV lower), same 2.5V UV threshold and 3.3V REG. | Targets conservative chemistries (e.g., LFP-influenced NMC) where lower OVP prevents premature cutoff during voltage sag. | Choose for applications prioritizing cycle life over peak energy extraction - trades 5% capacity for +200 cycles at 80% SOH. |
Compared with BQ296231DSGT, BQ296221DSGT offers a 50mV lower OVP threshold for tighter safety margins, while BQ296233DSGT reduces OVP by 150mV to extend usable capacity in voltage-sensitive chemistries - neither is pin-compatible nor drop-in; both require OVP threshold revalidation and layout review.
Availability
BQ296231DSGT is available at Aetrix Electronics and suitable for notebook PC battery protection, ultrabook power management, and medical portable device packs requiring stable component supply, long-lifecycle support, and TI-qualified automotive-grade reliability.
Supply support for BQ296231DSGT 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 experience in battery safety ICs.
The BQ296xxx family was designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, emphasizing ultra-low quiescent current, factory-trimmed accuracy, and integrated regulated supply to simplify pack-level safety architecture.
FAQ
What is the factory-programmed overvoltage threshold for BQ296231DSGT?
The BQ296231DSGT has a factory-programmed overvoltage threshold of 4.60V with ±10mV accuracy at 25°C. This value is laser-trimmed during production and cannot be adjusted externally. It applies to each individual cell (V1–VSS, V2–V1, V3–V2, V4–V3), enabling true per-cell protection without additional components. The BQ296231DSGT datasheet confirms this value in Table 4-2 and Section 6.5.
Does BQ296231DSGT support 2-cell, 3-cell, and 4-cell battery configurations?
Yes, BQ296231DSGT supports 2-, 3-, and 4-series Li-ion configurations via its four independent sense inputs (V1–V4). For 2-cell setups, V3 and V4 are shorted to V2; for 3-cell, V4 is shorted to V3. All configurations retain full OVP monitoring and 3.3V REG functionality. TI's SLUSBU5V datasheet explicitly validates this in Figures 5-1/5-2 and Section 7.4.1.
How does the regulated output (REG) of BQ296231DSGT behave during undervoltage conditions?
The BQ296231DSGT REG pin self-disables when any monitored cell voltage falls below the factory-programmed 2.5V undervoltage threshold (VUVREG) for ≥6 seconds (tUVDELAY). It re-enables only after all cells exceed 2.5V + 300mV hysteresis. This prevents battery drain during storage or deep discharge. The behavior is confirmed in Section 7.3.3 and Figure 7-2 of the BQ296231DSGT datasheet.
What is the maximum load current supported by the REG pin on BQ296231DSGT?
The BQ296231DSGT REG pin delivers up to 2mA continuous output current at 3.3V, with short-circuit current limiting at 4mA. Performance is specified across –40°C to +110°C with a 0.47µF ceramic capacitor to VSS. Load regulation holds within ±100mV from 0 to 2mA, as documented in Section 6.5 Electrical Characteristics of the BQ296231DSGT datasheet.
Is BQ296231DSGT pin-compatible with other BQ2962 variants like BQ296221DSGT or BQ296233DSGT?
No, BQ296231DSGT is not pin-compatible with other BQ2962 variants in terms of functional behavior - though all share identical 8-pin WSON packaging and pinout mapping, their factory-programmed parameters differ. BQ296221DSGT uses 4.55V OVP, and BQ296233DSGT uses 4.45V OVP; substituting them requires revalidation of protection thresholds and timing margins per IEC 62133.
BQ296231DSGT 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)
BQ296231DSGT FAQ
1.How can I place an order for BQ296231DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296231DSGT 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 BQ296231DSGT reliable?
The price and inventory of BQ296231DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296231DSGT is usually 5 days.
3.What payment methods are accepted for BQ296231DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296231DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296231DSGT?
BQ296231DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296231DSGT 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 BQ296231DSGT?
For technical support, including BQ296231DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296231DSGT requirements.
6.How does Aetrix verify that BQ296231DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296231DSGT 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 BQ296231DSGT meets industry standards.
7.What is the process for return or replacement of BQ296231DSGT?
All BQ296231DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296231DSGT, 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 BQ296231DSGT part is unused and in its original packaging.
Return procedure for BQ296231DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ296231DSGT Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
