My Inquiry
My Account
Texas Instruments BQ296111DSGR
- Part No.:
- BQ296111DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296111DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,906
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ296111DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2- to 4-series Li-ion battery packs, featuring factory-programmed 4.45V OVP threshold, 4-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 protection in notebook PC battery management systems.
For engineers reviewing the BQ296111DSGR datasheet, BQ296111DSGR pinout, BQ296111DSGR application, or BQ296111DSGR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed application roles in battery safety systems, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The BQ296111DSGR independently monitors each cell voltage (V1–VSS, V2–V1, V3–V2, V4–V3) against a factory-set 4.45V overvoltage threshold with 300mV hysteresis and ±10mV accuracy at 25°C. Upon detection, it initiates a precise 4-second internal delay before asserting an active-high OUT signal to trigger external FETs for fuse blow.
Its integrated 3.3V regulated supply delivers up to 2mA to always-on circuits (e.g., RTC), self-disables when any cell drops below 2.5V (factory-configured UV threshold), and consumes only 4µA during normal operation or 1.2µA when REG is disabled - enabling ultra-low-power battery pack monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.45V ±10mV at 25°C - ensures precise cell overvoltage cutoff without premature tripping in Li-ion stacks. |
| OVP Delay Timer | 4.0s ±0.8s - provides deterministic fault response window before FET activation, balancing safety and transient immunity. |
| Regulated Output | 3.3V ±30mV at 500µA load - powers RTC or supervisor ICs with stable voltage, eliminating need for external LDO. |
| Supply Current | 4µA typical (REG on), 1.2µA typical (REG off) - enables multi-year shelf life and minimal standby drain in sealed battery packs. |
| Cell Input Leakage | <100nA per sense pin - prevents voltage measurement error and preserves cell balance in high-impedance monitoring networks. |
| Operating Temp | –40°C to +110°C - supports deployment in thermally demanding laptop battery compartments and medical devices. |
| Package | 8-pin WSON, 2.0mm × 2.0mm - enables compact placement on narrow battery pack PCBs with minimal footprint. |
Pinout & Package
Package: 8-pin WSON (2.00mm × 2.00mm), exposed thermal pad (TI recommends connecting to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); powers internal circuitry and supplies REG output; 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 1kΩ/0.1µF RC filter for accurate voltage monitoring. |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); identical filtering requirement as V1; unused pins shorted to adjacent Vx. |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); supports 3- and 4-series configurations; same RC network as other Vx pins. |
| V4 | Cell 4 sense input | Sense positive terminal of top cell (V4–V3); enables full 4-series stack monitoring; omitted in 2- or 3-series designs. |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground upon OVP; logic-high = fault condition asserted. |
| REG | Regulated supply output | 3.3V output (2mA max); powers external RTC or supervisor; self-disables if any cell falls below 2.5V for 6s. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.45V threshold with ±10mV accuracy at 25°C - eliminates calibration effort and guarantees consistent protection across production lots. |
| Fixed 4-second OVP delay | Deterministic 4.0s ±0.8s timing - avoids false triggers from charge voltage spikes while ensuring rapid response to sustained overvoltage. |
| Self-disable regulated output | Automatically disables 3.3V REG when any cell drops ≤2.5V for ≥6s - prevents deep discharge and extends battery cycle life. |
| Ultra-low quiescent current | 4µA (REG on) / 1.2µA (REG off) - enables >10-year shelf life in sealed battery packs with no maintenance charging required. |
| High-accuracy cell sensing | <100nA input leakage per Vx pin - maintains cell voltage integrity in high-resistance divider networks used for space-constrained battery PCBs. |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Monitors 3- or 4-cell Li-ion stacks during fast charging to prevent cell swelling or thermal runaway. IC Role / Device Role / Timing Role: Second-level overvoltage protector; asserts active-high OUT after 4s delay to trigger fuse-blowing FETs. Use Value: 4.45V ±10mV OVP threshold matches common Li-ion full-charge voltage (4.2V/cell × 3 = 12.6V), minimizing false trips. |
Use Scenario: Powers real-time clock and fuel gauge ICs during system sleep mode using regulated 3.3V output. IC Role / Device Role / Timing Role: Dual-function protector and power source; REG output self-disables if cell voltage drops below 2.5V. Use Value: 2mA REG output eliminates need for separate LDO, reducing BOM count and PCB area in thin-profile ultrabooks. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Ensures fail-safe battery disconnect in defibrillators or infusion pumps where overvoltage could compromise patient safety. IC Role / Device Role / Timing Role: Safety-critical OVP monitor; uses 300mV hysteresis to prevent oscillation near trip point during voltage recovery. Use Value: –40°C to +110°C operating range supports sterilization cycles and extended field use in clinical environments. |
Use Scenario: Maintains backup power integrity in telecom UPS units by protecting 4-series Li-ion strings from charger overvoltage faults. IC Role / Device Role / Timing Role: Stack-level protector with independent cell monitoring; OUT signal interfaces directly with MCU-controlled fuse drivers. Use Value: 8-pin WSON package enables dense layout on UPS control boards where space is constrained by large electrolytic capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296112DSGR | 4.50V OVP threshold, 3.0s delay timer, same 3.3V REG output and 8-pin WSON package | Better suited for higher-voltage Li-ion chemistries (e.g., 4.35V/cell) requiring faster fault response | Select when tighter OVP margin or reduced delay is needed; pinout and REG behavior are identical. |
| BQ296114DSGR | 4.50V OVP threshold, 4.0s delay timer, same 3.3V REG output and 8-pin WSON package | Matches BQ296111DSGR delay but raises OVP threshold for improved tolerance to charge voltage ripple | Choose for enhanced noise immunity in high-EMI environments without changing timing or power architecture. |
Compared with BQ296111DSGR, BQ296112DSGR offers faster fault response at higher OVP voltage, while BQ296114DSGR retains identical timing but increases OVP margin - both share full pin compatibility, REG functionality, and thermal performance, enabling drop-in replacement in existing layouts.
Availability
BQ296111DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable device designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BQ296111DSGR 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 and precision analog ICs.
The BQ296xxx family is designed specifically for second-level overvoltage protection and regulated auxiliary power in multi-cell Li-ion battery packs - targeting high-reliability portable computing, medical, and industrial energy storage applications.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296111DSGR?
The BQ296111DSGR has a factory-programmed overvoltage protection threshold of 4.45V with ±10mV accuracy at 25°C and ±54mV accuracy across the full –40°C to +110°C operating range. This specification is measured under standard test conditions (VDD = 14.4V, TA = 25°C) and ensures precise cell-level voltage monitoring without user calibration. The BQ296111DSGR achieves this via laser-trimmed internal references and matched comparator circuitry.
How does the BQ296111DSGR regulate its 3.3V output and what is its maximum load capability?
The BQ296111DSGR integrates a low-dropout linear regulator delivering a stable 3.3V ±30mV output at up to 2mA load current. It requires a 0.47µF ceramic capacitor on the REG pin for stability and includes short-circuit current limiting (4mA typical). The BQ296111DSGR automatically disables this output if any monitored cell voltage falls below 2.5V for 6 seconds, preventing excessive battery discharge.
What is the function of the OUT pin on the BQ296111DSGR and how is it driven?
The OUT pin on the BQ296111DSGR is a CMOS active-high output that transitions to logic high after a 4-second delay upon detection of any cell overvoltage condition. It sources up to 4.5mA and is designed to directly drive the gate of an external NMOS FET, creating a low-impedance path to ground for fuse blowing. The BQ296111DSGR does not include open-drain or level-shifting capability - it operates as a standard push-pull driver referenced to VDD.
Can the BQ296111DSGR be used in 2-cell, 3-cell, and 4-cell battery configurations?
Yes, the BQ296111DSGR supports 2-, 3-, and 4-series Li-ion configurations through dedicated sense inputs (V1–VSS, V2–V1, V3–V2, V4–V3). Unused higher-order sense pins (e.g., V4 in a 3-cell stack) must be shorted to the adjacent lower pin (V3) to maintain proper biasing. All configurations retain identical OVP threshold, delay timing, and REG output behavior - the BQ296111DSGR adapts automatically based on physical pin connections.
What are the absolute maximum ratings and recommended operating conditions for the BQ296111DSGR?
The BQ296111DSGR has an absolute maximum VDD–VSS rating of 30V and a recommended operating range of 3V to 20V. Cell differential inputs (Vx–Vx−1) tolerate 0–5V, and the device operates from –40°C to +110°C ambient. Exceeding 30V on VDD or applying reverse voltage on any sense pin may cause permanent damage. The BQ296111DSGR also specifies 2000V HBM ESD rating, making it robust for automated battery pack assembly.
BQ296111DSGR 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)
BQ296111DSGR FAQ
1.How can I place an order for BQ296111DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296111DSGR 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 BQ296111DSGR reliable?
The price and inventory of BQ296111DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296111DSGR is usually 5 days.
3.What payment methods are accepted for BQ296111DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296111DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296111DSGR?
BQ296111DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296111DSGR 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 BQ296111DSGR?
For technical support, including BQ296111DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296111DSGR requirements.
6.How does Aetrix verify that BQ296111DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296111DSGR 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 BQ296111DSGR meets industry standards.
7.What is the process for return or replacement of BQ296111DSGR?
All BQ296111DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296111DSGR, 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 BQ296111DSGR part is unused and in its original packaging.
Return procedure for BQ296111DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ296111DSGR 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…
