My Inquiry
My Account
Texas Instruments BQ296215DSGT
- Part No.:
- BQ296215DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296215DSGT.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
BQ296215DSGT from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.50V 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 external FETs to blow fuses during overvoltage faults in notebook PC battery protection circuits.
For engineers reviewing the BQ296215DSGT datasheet, BQ296215DSGT pinout, BQ296215DSGT application, or BQ296215DSGT equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, cell-level voltage monitoring specs, and validated alternative options for battery pack safety design.
Technical Context
The BQ296215DSGT implements independent per-cell voltage sensing across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.50V overvoltage threshold with ±10mV accuracy at 25°C and 300mV hysteresis. Its internal 6.5-second fixed-delay timer initiates upon any cell exceeding VOV and triggers an active-high CMOS OUT signal to control external protection FETs.
It integrates a 3.0V regulated supply (±30mV load regulation from 0–2mA) with self-disable functionality activated when any cell voltage falls below the factory-set 2.5V undervoltage threshold for 6 seconds; REG remains stable with 0.47µF ceramic output capacitance and draws only 1.2µA when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | Factory-programmed 4.50V ±10mV at 25°C - ensures precise cell voltage clamping without external calibration |
| OVP Delay Timer | Fixed 6.5s delay - provides deterministic fault response time before triggering protection FETs |
| Regulated Output | 3.0V ±30mV (0–2mA load) - powers RTC or always-on circuitry with stable low-noise supply |
| Supply Current | 4µA (REG enabled), 1.2µA (REG disabled) - enables multi-year battery shelf life in standby |
| Cell Input Leakage | <100nA per Vx pin - minimizes parasitic discharge and preserves cell voltage balance |
| Operating Temp | –40°C to +110°C - supports operation in harsh thermal environments inside battery packs |
| Package | 8-pin WSON (2.0mm × 2.0mm) - enables compact, high-density battery management PCB layouts |
Pinout & Package
8-pin WSON package (2.00mm × 2.00mm) with exposed thermal pad connected to VSS; RoHS-compliant, moisture-sensitive level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); powers internal circuitry and REG LDO; 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–V4 | Cell voltage sense inputs | Differential inputs monitoring (V1–VSS), (V2–V1), (V3–V2), (V4–V3); support 2–4 series configurations |
| OUT | Overvoltage fault signal | CMOS active-high output; drives NMOS gate to short fuse to ground during OVP event |
| REG | Regulated supply output | 3.0V output (2mA max); self-disables if any cell <2.5V for 6s; requires 0.47µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell overvoltage monitoring | Independent sensing of all 4 cell voltages with ±10mV accuracy ensures no single weak cell escapes detection |
| Self-disable regulated output | Automatically shuts down 3.0V REG supply when any cell drops below 2.5V - prevents deep discharge damage |
| Factory-programmed configuration | No external resistors or programming required: 4.50V OVP, 6.5s delay, 2.5V UV, and 3.0V REG are laser-trimmed at wafer test |
| Low-quiescent current operation | 1.2µA ICC with REG disabled - extends battery shelf life in storage or long-term standby modes |
| Customer Test Mode (CTM) | Enables fast production testing of OVP delay via 10V VDD–V4 differential - reduces test time without full cell stack |
Applications
| Notebook PC Battery Pack | Ultrabook Power Management |
|---|---|
Use Scenario: Integrated into multi-cell Li-ion battery packs to prevent overcharging during AC adapter charging or regenerative braking. IC Role / Device Role / Timing Role: Second-level hardware OVP monitor that triggers fuse blow after 6.5s delay upon detecting ≥4.50V on any cell. Use Value: Prevents thermal runaway by enforcing strict voltage ceiling before charger IC or system software can react. |
Use Scenario: Embedded in slim-profile battery modules where space constraints limit discrete protection components. IC Role / Device Role / Timing Role: Provides compact, calibrated OVP + 3.0V always-on supply for embedded fuel gauges and RTCs. Use Value: Eliminates need for external LDO and voltage dividers while maintaining <100nA cell leakage for accurate SOC tracking. |
| Medical Portable Device Battery | UPS Battery Backup System |
Use Scenario: Safeguarding sealed Li-ion packs in portable diagnostic equipment requiring IEC 62368-1 compliance. IC Role / Device Role / Timing Role: Independent cell-level OVP supervisor with fail-safe CTM test mode for production validation. Use Value: Enables traceable, repeatable safety verification without full battery cycling - critical for medical device certification. |
Use Scenario: Protecting 4-series backup batteries in telecom or data center UPS units exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-accuracy OVP (±10mV) with –40°C to +110°C operation ensures reliable protection under extreme conditions. Use Value: Maintains tight voltage guardband across temperature, preventing premature fuse blow during cold startup or hot operation. |
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 3.0V REG, but 4.35V OVP threshold and 3.0s delay timer | Better suited for lower-voltage Li-ion chemistries or faster fault response requirements | Select when tighter OVP margin or reduced delay is needed without changing layout or firmware |
| BQ296224DSGT | Identical 4.50V OVP and 6.5s delay, but same 3.0V REG output and same –40°C to +110°C rating | No functional difference in protection behavior; differs only in internal laser trim binning | Valid drop-in replacement with identical electrical performance and qualification status |
Compared with BQ296215DSGT, BQ296213DSGT offers earlier overvoltage intervention at 4.35V with faster 3s response, while BQ296224DSGT provides identical protection timing and voltage thresholds - enabling direct substitution where second-source assurance is required.
Availability
BQ296215DSGT is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable device batteries requiring stable component supply, long-lifecycle support, and guaranteed TI original sourcing.
Supply support for BQ296215DSGT 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 battery safety IC expertise.
The BQ296xxx product line was designed specifically for second-level hardware overvoltage protection in multi-cell Li-ion battery packs, integrating precision sensing, regulated auxiliary supply, and robust fault signaling in ultra-small WSON packages.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296215DSGT?
The BQ296215DSGT has a factory-programmed overvoltage protection threshold of 4.50V with ±10mV accuracy at 25°C, and ±54mV accuracy across the full –40°C to +110°C operating range. This precision eliminates need for external calibration and ensures consistent cell voltage clamping in demanding thermal environments.
How does the regulated 3.0V output on the BQ296215DSGT behave during battery discharge?
The BQ296215DSGT's REG pin delivers a stable 3.0V output up to 2mA, but automatically disables when any monitored cell voltage falls below the factory-set 2.5V undervoltage threshold for 6 seconds. It re-enables only after all cells exceed 2.55V (2.5V + 50mV hysteresis), preventing deep discharge damage to the battery pack.
What is the purpose of the Customer Test Mode (CTM) in the BQ296215DSGT?
The BQ296215DSGT's Customer Test Mode allows rapid validation of the 6.5s overvoltage delay timer during production testing by applying a ≥10V differential between VDD and V4 - reducing test time versus full battery stack simulation. CTM activates a shortened delay (>10ms) while preserving functional integrity.
Can the BQ296215DSGT be used in both 2-series and 4-series Li-ion battery configurations?
Yes, the BQ296215DSGT supports 2-, 3-, and 4-series Li-ion battery stacks via its V1–V4 sense inputs. Unused higher-order pins (e.g., V4 in a 2-series pack) are shorted to the adjacent lower pin (V3), and the device ignores differential voltages below 0.5V to avoid false undervoltage detection.
What are the absolute maximum ratings for the BQ296215DSGT's VDD and cell sense pins?
The BQ296215DSGT allows VDD–VSS up to 30V absolute maximum, and individual cell differential inputs (Vx–Vx−1) up to 30V. However, recommended operating conditions limit VDD to 20V and cell differentials to 5V. Exceeding absolute maximums risks permanent damage - especially during Customer Test Mode.
BQ296215DSGT 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)
BQ296215DSGT FAQ
1.How can I place an order for BQ296215DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296215DSGT 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 BQ296215DSGT reliable?
The price and inventory of BQ296215DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296215DSGT is usually 5 days.
3.What payment methods are accepted for BQ296215DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296215DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296215DSGT?
BQ296215DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296215DSGT 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 BQ296215DSGT?
For technical support, including BQ296215DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296215DSGT requirements.
6.How does Aetrix verify that BQ296215DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296215DSGT 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 BQ296215DSGT meets industry standards.
7.What is the process for return or replacement of BQ296215DSGT?
All BQ296215DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296215DSGT, 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 BQ296215DSGT part is unused and in its original packaging.
Return procedure for BQ296215DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ296215DSGT 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…
