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Texas Instruments BQ296113DSGR
- Part No.:
- BQ296113DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296113DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,007
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Product details
Overview
BQ296113DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protection IC for 2- to 4-series Li-ion battery packs, featuring factory-programmed 4.35V OVP threshold, 3-second fixed delay timer, ±10mV OVP accuracy, active-high fault output (OUT), and 3.3V regulated supply (REG) delivering up to 2mA - used in notebook PC battery protection circuits to prevent cell overcharge and power real-time clock circuitry.
For engineers reviewing the BQ296113DSGR datasheet, BQ296113DSGR pinout, BQ296113DSGR application, or BQ296113DSGR equivalent, this page delivers verified technical context, exact pin functions, confirmed operating parameters across temperature, self-disable behavior of the REG output under undervoltage, and validated alternative parts for battery pack secondary protection design.
Technical Context
The BQ296113DSGR implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.35V overvoltage threshold with 300mV hysteresis. Upon detection of any cell exceeding VOV, a fixed 3-second internal timer initiates before asserting the CMOS-active-high OUT signal to drive an external NMOS FET for fuse blow control.
Its integrated 3.3V regulated supply (REG) delivers up to 2mA with ±30mV load regulation (0–2mA), self-disables when any cell voltage falls below 2.5V for ≥6 seconds, and draws only 1.2µA quiescent current when disabled - enabling always-on RTC support without excessive battery drain during storage or deep discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.35V ±10mV at 25°C; ensures precise cell overcharge cutoff within tight Li-ion voltage window |
| OVP Delay Timer | 3.0s ±0.6s; provides deterministic fault response time before fuse activation |
| REG Output Voltage | 3.300V ±30mV (0–2mA load); powers RTC or supervisor IC without external LDO |
| Supply Current (REG on) | 4–8µA (–40°C to +110°C); enables multi-year battery shelf life in standby |
| Input Leakage (per cell) | <100nA; minimizes parasitic discharge in high-impedance cell monitoring paths |
| Operating Temp Range | –40°C to +110°C; supports operation in thermally demanding laptop battery packs |
| Package | 8-pin WSON (2.0mm × 2.0mm); enables compact placement near cell stack in space-constrained battery modules |
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); 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 | Sense voltage between lowest cell's (+) and VSS; used in all 2S–4S configurations |
| V2 | Cell 2 sense input | Sense voltage between second cell's (+) and V1; ignored if unused (shorted to V1 in 2S) |
| V3 | Cell 3 sense input | Sense voltage between third cell's (+) and V2; ignored if unused (shorted to V2 in 2S/3S) |
| V4 | Cell 4 sense input | Sense voltage between fourth cell's (+) and V3; ignored if unused (shorted to V3 in 2S/3S) |
| OUT | Overvoltage fault output | CMOS active-high signal; drives gate of external NMOS to short fuse to ground during OVP |
| REG | Regulated supply output | 3.3V output (0–2mA); self-disables if any cell <2.5V for ≥6s; requires 0.47µF ceramic capacitor to VSS |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.35V threshold with ±10mV accuracy at 25°C eliminates external resistor network and calibration |
| Fixed 3-second OVP delay | Deterministic 3.0s ±0.6s timer prevents nuisance tripping while ensuring timely fault response |
| Self-disabling 3.3V REG | Automatically shuts down when any cell drops below 2.5V for 6s - prevents battery depletion during storage |
| Ultra-low quiescent current | 1.2µA with REG disabled enables >10-year shelf life in battery-backed applications |
| Per-cell monitoring architecture | Independent sensing of V1–VSS, V2–V1, V3–V2, V4–V3 supports flexible 2S/3S/4S configurations without redesign |
Applications
| Ultrabook Battery Protection | Notebook PC Secondary Protection |
|---|---|
Use Scenario: Monitors individual cell voltages in slim-profile ultrabook battery packs during charging to prevent overvoltage-induced thermal runaway. IC Role / Device Role / Timing Role: Second-level OVP protector; asserts active-high OUT after 3s delay to trigger fuse blow via external NMOS when any cell exceeds 4.35V. Use Value: Enables compliance with UL 2054/IEC 62133 by providing redundant overvoltage cutoff independent of primary fuel gauge. |
Use Scenario: Integrated into OEM notebook battery management systems to safeguard against charger malfunction or BMS failure. IC Role / Device Role / Timing Role: Standalone hardware-based OVP monitor with 3.3V REG output powering the system's real-time clock during sleep mode. Use Value: Maintains RTC functionality without drawing from main battery during long-term storage, thanks to 1.2µA REG-off current. |
| Medical Portable Device Backup | UPS Battery Module Monitoring |
Use Scenario: Protects Li-ion backup batteries in portable ultrasound or infusion pumps where cell overvoltage poses safety-critical risk. IC Role / Device Role / Timing Role: Hardware-enforced OVP guardrail with ±10mV accuracy and 300mV hysteresis to prevent false triggers from transient noise. Use Value: Meets IEC 62368-1 creepage/clearance requirements via 2mm × 2mm WSON package and low-leakage (<100nA) inputs. |
Use Scenario: Embedded in rack-mount UPS battery cartridges to detect overvoltage during grid-sourced charging cycles. IC Role / Device Role / Timing Role: Regulated 3.3V supply powers microcontroller watchdog circuitry while continuously monitoring 4-series cell stack. Use Value: Eliminates need for separate LDO and voltage monitor ICs - reduces BOM count and PCB area in cost-sensitive UPS modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296112DSGR | Same 4.50V OVP threshold, 3s delay, 3.3V REG, but higher OVP setpoint increases risk of missing early overcharge in 4.2V nominal cells | Preferred where tighter margin above 4.2V max cell voltage is acceptable (e.g., high-temp charging profiles) | Select BQ296112DSGR only if system requires 4.50V trip point; verify cell chemistry tolerates extended dwell above 4.35V |
| BQ296114DSGR | 4.50V OVP, 4s delay, same 3.3V REG - longer delay increases overvoltage exposure time before fault action | Suitable for applications with slower-charging chemistries or where reduced false-trigger rate outweighs faster response need | Choose BQ296114DSGR when system-level validation confirms 4s delay meets safety reaction time requirements |
Compared with BQ296113DSGR, BQ296112DSGR raises OVP to 4.50V (increasing overcharge risk), while BQ296114DSGR extends delay to 4s (reducing fault response speed); both retain identical 3.3V REG and WSON-8 packaging, but require revalidation of protection timing and voltage margins.
Availability
BQ296113DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook energy storage modules, and medical portable device backup systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ296113DSGR 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 expertise in battery safety ICs and high-reliability analog design.
The BQ296xxx family is designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, delivering hardware-enforced safety margins, regulated auxiliary power, and configurable thresholds to meet stringent UL/IEC standards.
FAQ
What is the factory-programmed overvoltage threshold for BQ296113DSGR?
The BQ296113DSGR has a factory-programmed overvoltage protection (OVP) threshold of 4.35V with ±10mV accuracy at 25°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The threshold remains stable across –40°C to +110°C with drift bounded by ±54mV at 110°C, ensuring reliable overcharge cutoff for standard 4.2V nominal Li-ion cells.
How does the regulated output (REG) of BQ296113DSGR behave during battery discharge?
The BQ296113DSGR's REG pin delivers a stable 3.3V output up to 2mA but self-disables when any monitored cell voltage falls below 2.5V for ≥6 seconds. Once disabled, REG remains off until all cell voltages rise above 2.5V + 300mV hysteresis. This behavior prevents excessive battery drain during storage or deep discharge, extending shelf life while maintaining RTC functionality during normal operation.
What is the purpose of the fixed 3-second delay timer in BQ296113DSGR?
The fixed 3-second delay timer in BQ296113DSGR prevents false triggering due to transient voltage spikes during charging. When any cell exceeds 4.35V, the timer starts; only upon expiration does the active-high OUT signal assert to drive an external NMOS FET and initiate fuse blow. This deterministic 3.0s ±0.6s delay ensures robust fault response while complying with safety standards requiring controlled shutdown timing.
Can BQ296113DSGR be used in a 2-series Li-ion configuration?
Yes, BQ296113DSGR supports 2-series, 3-series, and 4-series Li-ion configurations. In a 2S setup, V3 and V4 pins are shorted to V2 and V3 respectively, and the device monitors only V1–VSS and V2–V1. All protection features - including 4.35V OVP, 3s delay, and 3.3V REG - remain fully functional. No configuration pins or external components are required to adapt across series counts.
What package type and footprint does BQ296113DSGR use?
BQ296113DSGR uses an 8-pin WSON package with 2.00mm × 2.00mm body size and an exposed thermal pad. It is compatible with standard SMT reflow processes and requires connection of the exposed pad to VSS on the PCB for thermal performance and ESD robustness. The compact footprint enables placement directly adjacent to the cell stack in space-constrained battery modules.
BQ296113DSGR 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)
BQ296113DSGR FAQ
1.How can I place an order for BQ296113DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296113DSGR 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 BQ296113DSGR reliable?
The price and inventory of BQ296113DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296113DSGR is usually 5 days.
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Once your BQ296113DSGR 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 BQ296113DSGR?
For technical support, including BQ296113DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296113DSGR requirements.
6.How does Aetrix verify that BQ296113DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296113DSGR 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 BQ296113DSGR meets industry standards.
7.What is the process for return or replacement of BQ296113DSGR?
All BQ296113DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296113DSGR, 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 BQ296113DSGR part is unused and in its original packaging.
Return procedure for BQ296113DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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