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Texas Instruments BQ296900DSGR
- Part No.:
- BQ296900DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296900DSGR.pdf
- Description:
- OVERVOLTAGE PROTECTION FOR 2-, 3
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
BQ296900DSGR from Texas Instruments is a factory-programmed, high-accuracy overvoltage protector for 2–4 series Li-ion/LiFePO₄ battery packs, featuring 4.65V ±12mV OVP threshold, 6.5s fixed delay timer, active-high output drive, and 3.3V regulated 3mA supply. It operates in NORMAL mode at 1.23µA quiescent current and maintains OVP detection even during undervoltage conditions - critical for imbalanced pack safety in portable computing.
For engineers reviewing the BQ296900DSGR datasheet, BQ296900DSGR pinout, BQ296900DSGR application, or BQ296900DSGR equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, regulator load capability, and validated alternative options - all confirmed against TI's SLUSF53C (June 2025) production data.
Technical Context
The BQ296900DSGR implements second-level cell-by-cell voltage monitoring across up to four series-connected cells using dedicated V1–V4 sense inputs with <100nA leakage per input. Its internal comparator compares each cell voltage against a factory-trimmed 4.65V OVP threshold with ±12mV accuracy at 25°C and 300mV hysteresis.
Upon OVP detection on any cell, a fixed 6.5s delay timer initiates; expiration triggers the CMOS-active-high OUT pin to assert and drive external protection FETs. Simultaneously, the REG pin delivers a stable 3.3V/3mA regulated supply - self-disabled only if any cell falls below the factory-set 2.5V UV threshold for 6.5s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.65V ±12mV at 25°C - enables precise cell voltage clamping without external calibration |
| OVP Delay Timer | 6.5s fixed duration - provides deterministic fault response window before FET activation |
| Regulated Output | 3.3V ±30mV at 3mA load - powers RTC or supervisor ICs without external LDO |
| Quiescent Current | 1.23µA in NORMAL mode - extends battery shelf life in always-connected devices |
| UV Threshold | 2.5V ±50mV - disables REG supply to prevent deep discharge while preserving OVP monitoring |
| Package | 8-pin WSON (2.0mm × 2.0mm) - supports high-density battery pack PCB layouts |
| Operating Temp | –40°C to +110°C - qualified for industrial and automotive-adjacent portable systems |
Pinout & Package
8-pin WSON package (2.0mm × 2.0mm) with exposed thermal pad (PWPD) recommended to be connected to VSS for optimal thermal performance and ESD robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Cell 1 positive sense input | Monitors lowest cell voltage (V1–VSS); input bias current <100nA preserves cell balance |
| V2 | Cell 2 positive sense input | Monitors second cell (V2–V1); supports 2S–4S stack configurations via pin shorting |
| V3 | Cell 3 positive sense input | Monitors third cell (V3–V2); unused pins in 2S/3S designs may float or tie to adjacent Vx |
| V4 | Cell 4 positive sense input | Monitors top cell (V4–V3); required only in 4S applications |
| VSS | Ground reference & cell stack negative | Common return for all cell measurements and internal circuitry; connects to pack negative |
| OUT | OVP fault signal output | CMOS active-high drive (0.4V low / VDD–1.1V high @3V); asserts after 6.5s OVP delay |
| REG | Regulated supply output | 3.3V/3mA source with short-circuit current limit (3.2–25mA); requires 0.47µF ceramic cap to VSS |
| VDD | Unregulated power input | Accepts 3V–22V; powers internal circuitry and REG block; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.65V threshold with ±12mV accuracy eliminates external resistor networks and calibration |
| Dual-mode protection logic | OVP remains fully functional during undervoltage (2.5V UV threshold), enabling fault detection in imbalanced packs |
| Integrated 3.3V regulator | Delivers 3mA to external RTC or microcontroller wake-up circuitry - no secondary LDO needed |
| Ultra-low power states | 0.25µA UV mode current extends battery standby time without disabling safety monitoring |
| Configurable output drive | Active-high output simplifies interface to NMOS gate drivers in fuse-blow circuits |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Monitors 3S or 4S Li-ion cells in slim-profile notebooks where thermal headroom and board area are constrained. IC Role / Device Role / Timing Role: Second-level OVP supervisor that triggers FET-based fuse blow only after confirmed 6.5s overvoltage - preventing false trips from transient spikes. Use Value: Enables compliance with UL 2054/IEC 62133 by guaranteeing cell voltage stays ≤4.65V under fault, while 1.23µA quiescent current minimizes self-discharge during storage. |
Use Scenario: Protects high-energy-density 4S Li-ion packs in fanless ultrabooks operating across –20°C to +60°C ambient. IC Role / Device Role / Timing Role: Regulated 3.3V output powers always-on RTC and system supervisor; OVP detection continues even if one cell drops to 2.4V. Use Value: Eliminates need for discrete UV/OV comparators and LDO - reducing BOM count by ≥3 components and saving >3mm² PCB area. |
| Portable Medical Electronics | UPS Battery Backup Systems |
Use Scenario: Secures sealed 2S/3S LiFePO₄ packs in portable defibrillators and infusion pumps requiring >10-year shelf life. IC Role / Device Role / Timing Role: Maintains OVP vigilance at 0.25µA in UV mode - detects overvoltage events even when pack voltage sags to 2.45V during long-term storage. Use Value: Prevents thermal runaway initiation during aging or partial discharge, supporting ISO 13485 design assurance without external watchdog timers. |
Use Scenario: Safeguards 4S Li-ion backup banks in telecom UPS units exposed to wide temperature swings and infrequent cycling. IC Role / Device Role / Timing Role: Uses V1–V4 inputs to monitor individual cell voltages; asserts OUT to disable charging path if any cell exceeds 4.65V during equalization. Use Value: Provides deterministic 6.5s delay before shutdown - allowing time for host controller intervention while ensuring hard OVP cutoff if unresponsive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296102DSGR | Same 4.65V OVP and 6.5s delay, but 3.0V REG output (vs. 3.3V) and 2.5V UV threshold | Suitable where 3.0V rail is preferred for legacy RTCs; identical pinout and layout | Select when existing design uses 3.0V-regulated peripherals and no revision to power tree is desired |
| BQ296909DSGR | Identical OVP/delay/REG specs, but 2.7V UV threshold (vs. 2.5V) and same 3.3V REG | Better suited for higher-voltage Li-ion chemistries where deeper discharge is acceptable before REG disable | Choose for applications requiring extended runtime down to 2.7V/cell before regulator shutdown |
Compared with BQ296900DSGR, BQ296102DSGR offers identical protection timing but targets 3.0V-system compatibility, while BQ296909DSGR raises the UV threshold to 2.7V - trading earlier REG disable for longer usable capacity in high-VOC cells.
Availability
BQ296900DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management, and portable medical electronics requiring stable component supply, long-lifecycle support, and production-grade TI qualification.
Supply support for BQ296900DSGR 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 ICs, with decades of battery protection IP and AEC-Q200-aligned reliability validation.
The BQ2969 family is designed specifically for second-level overvoltage protection in multi-cell Li-ion and LiFePO₄ battery packs - delivering integrated regulation, ultra-low power operation, and factory-trimmed precision without external components.
FAQ
What is the factory-programmed OVP threshold and accuracy for BQ296900DSGR?
The BQ296900DSGR has a factory-programmed overvoltage protection threshold of 4.65V with ±12mV accuracy at 25°C, as specified in TI's SLUSF53C production datasheet. This value is laser-trimmed during manufacturing and does not require external resistor networks. The accuracy degrades to ±50mV across the full –40°C to +110°C operating range, maintaining reliable clamping for Li-ion cells.
Does BQ296900DSGR retain overvoltage detection capability when a cell voltage falls below the undervoltage threshold?
Yes, BQ296900DSGR retains full overvoltage detection capability even when operating in undervoltage mode (e.g., when any cell drops below its factory-set 2.5V UV threshold). The device draws only 0.25µA in this state but continues monitoring all V1–V4 inputs - enabling fault detection in imbalanced battery packs where one cell is deeply discharged while another is overcharged.
What is the maximum load current supported by the REG pin on BQ296900DSGR?
The REG pin on BQ296900DSGR delivers up to 3mA of continuous output current at 3.3V, with output voltage maintained within ±30mV (3.27V–3.33V) under full load and 25°C conditions. Short-circuit current is internally limited to 3.2–25mA, and a 0.47µF ceramic capacitor to VSS is mandatory for stability and noise immunity.
How does the 6.5-second OVP delay timer behave during Customer Test Mode (CTM)?
In Customer Test Mode (CTM), the BQ296900DSGR's OVP delay timer is reduced from 6.5 seconds to approximately 15ms - achieved by applying VDD ≈10V above V4. This accelerated timing allows rapid validation of OVP response in production test without waiting for full delay cycles, while preserving all other functional behavior including REG output and UV monitoring.
Can BQ296900DSGR be used in 2-series or 3-series battery configurations?
Yes, BQ296900DSGR supports 2S, 3S, and 4S Li-ion/LiFePO₄ configurations. For 2S designs, V3 and V4 pins are left unconnected or tied to V2; for 3S, V4 is unused. The device automatically ignores differential voltages below 0.45V–0.55V (VUVQUAL) on unused inputs, ensuring accurate monitoring without false UV assertions.
BQ296900DSGR 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:
- Multi-Chemistry
- Number of Cells:
- 2 ~ 4
- Fault Protection:
- Over/Under Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ296900DSGR FAQ
1.How can I place an order for BQ296900DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296900DSGR 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 BQ296900DSGR reliable?
The price and inventory of BQ296900DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296900DSGR is usually 5 days.
3.What payment methods are accepted for BQ296900DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296900DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296900DSGR?
BQ296900DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296900DSGR 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 BQ296900DSGR?
For technical support, including BQ296900DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296900DSGR requirements.
6.How does Aetrix verify that BQ296900DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296900DSGR 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 BQ296900DSGR meets industry standards.
7.What is the process for return or replacement of BQ296900DSGR?
All BQ296900DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296900DSGR, 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 BQ296900DSGR part is unused and in its original packaging.
Return procedure for BQ296900DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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