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Texas Instruments BQ296202DSGR
- Part No.:
- BQ296202DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296202DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BQ296202DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.45V 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 individual cell voltages and drives external FETs to blow fuses during overvoltage faults - used in notebook PC battery protection circuits.
For engineers reviewing the BQ296202DSGR datasheet, BQ296202DSGR pinout, BQ296202DSGR application, or BQ296202DSGR equivalent, key selection considerations include its 4.45V/6.5s OVP configuration, 3.3V/2mA regulated supply with self-disable, ultra-low 4µA supply current (REG on), and compatibility with 2–4 cell stacks requiring precise, autonomous secondary protection.
Technical Context
The BQ296202DSGR implements independent per-cell voltage monitoring using precision analog comparators referenced to a factory-trimmed 4.45V threshold, with 300mV hysteresis to prevent chatter. Its internal 6.5-second fixed-delay timer initiates upon first cell OVP detection and triggers CMOS-active-high OUT to control external NMOS fuse-switching FETs.
The device integrates a 3.3V linear regulator delivering up to 2mA, self-disabling when any cell voltage drops below the factory-set 2.5V undervoltage threshold after a 6s delay. Input leakage per Vx pin remains under 100nA, enabling high-impedance sensing without significant stack loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.45V ±10mV at 25°C - enables precise secondary overvoltage cutoff before cell damage in 4S Li-ion packs. |
| OVP Delay Timer | 6.5s fixed (±20%) - provides deterministic fault response window for controlled fuse blowing without nuisance trips. |
| Regulated Output | 3.3V ±2% at 0–2mA load - powers always-on RTC or supervisor ICs directly from battery stack without external LDO. |
| Supply Current (REG on) | 4µA typical at TA = 0–60°C - minimizes standby drain on multi-cell packs during long-term storage. |
| Input Leakage (per Vx) | <100nA - preserves cell voltage balance and avoids measurement error in high-impedance sensing networks. |
| Operating Temp Range | –40°C to +110°C - supports automotive-grade and industrial battery pack environments. |
| Package | 8-pin WSON (2.0mm × 2.0mm, 0.5mm pitch) - enables compact placement adjacent to cell sense points in tight battery modules. |
Pinout & Package
8-pin WSON package (2.00mm × 2.00mm, 0.5mm pitch) with exposed thermal pad connected to VSS. Pin 1 marked by dot; top view orientation matches Figure 5-2 in SLUSBU5V.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input tied to top of battery stack (up to 20V); 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 positive terminal of bottommost cell (V1–VSS); requires 1kΩ/0.1µF RC filter. |
| V2 | Cell 2 sense input | Sense positive terminal of second cell (V2–V1); identical filtering as V1. |
| V3 | Cell 3 sense input | Sense positive terminal of third cell (V3–V2); unused pins shorted to adjacent lower Vx in 2S/3S configs. |
| V4 | Cell 4 sense input | Sense positive terminal of topmost cell (V4–V3); required only in 4S configurations. |
| OUT | OVP fault signal output | CMOS active-high output driving gate of external NMOS FET to short fuse to ground during OVP event. |
| REG | Regulated supply output | 3.3V/2mA output for RTC or supervisor; requires 0.47µF ceramic capacitor to VSS for stability and ESD robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.45V threshold with ±10mV accuracy ensures consistent trip point across production without calibration. |
| Fixed 6.5s OVP delay | Deterministic timing eliminates need for external timing components and reduces BOM count in safety-critical packs. |
| Self-disabling 3.3V regulator | Automatically shuts down when any cell falls below 2.5V, preventing deep discharge and extending pack cycle life. |
| Ultra-low 4µA quiescent current | Enables >10-year shelf life for sealed battery packs without compromising protection responsiveness. |
| Per-pin <100nA input leakage | Maintains cell voltage balance in high-impedance stacks and avoids false OVP/UV detection due to leakage currents. |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
|
Use Scenario: Secondary overvoltage protection in slim-profile 3S/4S Li-ion battery modules where primary protection resides in fuel gauge IC. IC Role / Device Role / Timing Role: Standalone OVP monitor triggering NMOS fuse switch within 6.5s of cell voltage exceeding 4.45V. Use Value: Prevents thermal runaway during charger malfunction or cell imbalance, meeting UL 2054 and IEC 62133 requirements. |
Use Scenario: Always-on RTC power supply and fault signaling in fanless ultrabooks with constrained PCB space. IC Role / Device Role / Timing Role: Provides regulated 3.3V/2mA supply while continuously monitoring all cells for overvoltage events. Use Value: Eliminates need for separate LDO and discrete OVP circuit, reducing solution size by >30% vs. discrete alternatives. |
| Medical Portable Devices | UPS Battery Backup Systems |
|
Use Scenario: Safety-critical overvoltage cutoff in rechargeable Li-ion packs for portable diagnostic equipment. IC Role / Device Role / Timing Role: Autonomous secondary protector that operates independently of host MCU to guarantee fail-safe shutdown. Use Value: Meets IEC 62304 Class C software safety requirements by providing hardware-enforced OVP with no firmware dependency. |
Use Scenario: Overvoltage supervision in 4S Li-ion backup banks for telecom and data center UPS systems. IC Role / Device Role / Timing Role: Monitors each cell in series stack and asserts fault signal to system controller before charger overvoltage damages cells. Use Value: Extends battery service life by preventing repeated overcharge exposure, reducing field failure rate by >90% vs. unmonitored packs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296203DSGR | Identical 8-pin WSON package and 3.3V REG output, but OVP threshold is 4.50V (not 4.45V) with same 6.5s delay. | Used where tighter upper voltage margin is required before OVP activation, e.g., high-voltage Li-ion chemistries (e.g., NMC 4.45V nominal). | Select BQ296203DSGR if system design targets 4.50V OVP; otherwise BQ296202DSGR matches 4.45V standard cell specification. |
| BQ296231DSGR | Same package and 3.3V REG, but OVP threshold is 4.60V and UV threshold is 2.5V - higher OVP setpoint with identical timing. | Applicable in extended-voltage Li-ion variants (e.g., LiCoO₂ with 4.6V max charge) where standard 4.45V OVP would cause premature cutoff. | Choose BQ296231DSGR only when validated cell chemistry supports 4.60V operation; verify thermal derating at elevated thresholds. |
Compared with BQ296202DSGR, BQ296203DSGR raises OVP by 50mV for tighter margin control, while BQ296231DSGR increases it by 150mV for high-voltage chemistries - both retain identical 3.3V/2mA REG, 6.5s delay, and WSON-8 footprint, enabling drop-in replacement with only threshold validation required.
Availability
BQ296202DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, medical portable devices, and UPS battery backup systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BQ296202DSGR 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 management solutions.
The BQ296xxx family is designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, delivering autonomous, high-accuracy cell monitoring and regulated auxiliary power in ultra-small packages.
FAQ
What is the factory-programmed overvoltage threshold and delay time for BQ296202DSGR?
The BQ296202DSGR has a factory-programmed overvoltage threshold of 4.45V with ±10mV accuracy at 25°C and a fixed 6.5-second delay timer. This configuration is laser-trimmed during manufacturing and cannot be adjusted externally. The 6.5s delay is guaranteed across –40°C to +110°C with ±20% tolerance, ensuring reliable fault response timing in all operating conditions for BQ296202DSGR.
Does BQ296202DSGR provide a regulated output, and what are its specifications?
Yes, BQ296202DSGR provides a factory-configured 3.3V regulated output (REG pin) capable of delivering up to 2mA. At 500µA load, output voltage is 3.234V–3.366V; from 0–2mA, it remains within 3.200V–3.400V. It includes short-circuit current limiting (4mA) and self-disables when any cell voltage falls below 2.5V after a 6s delay - a core feature of BQ296202DSGR's integrated protection architecture.
How does BQ296202DSGR handle undervoltage conditions, and what is the self-disable behavior?
BQ296202DSGR self-disables its 3.3V REG output when any monitored cell voltage drops below the factory-set 2.5V undervoltage threshold for 6 seconds. Once disabled, REG remains off until all cell voltages exceed 2.5V + 300mV hysteresis. This prevents deep discharge and protects battery health - a critical behavior confirmed in BQ296202DSGR's functional modes and electrical characteristics tables.
What package type and pin configuration does BQ296202DSGR use?
BQ296202DSGR uses an 8-pin WSON package (2.00mm × 2.00mm, 0.5mm pitch) with exposed thermal pad connected to VSS. Pinout follows Figure 5-2: Pin 1 = VDD, Pin 2 = V4, Pin 3 = V3, Pin 4 = V2, Pin 5 = V1, Pin 6 = VSS, Pin 7 = OUT, Pin 8 = REG. This layout is optimized for compact placement near cell interconnects in battery modules and is shared across the BQ2962xx family including BQ296202DSGR.
Can BQ296202DSGR be used in 2-series, 3-series, and 4-series battery configurations?
Yes, BQ296202DSGR supports 2S, 3S, and 4S Li-ion configurations. Unused Vx pins (e.g., V4 in 2S) are shorted to the adjacent lower pin (V3 → V2), and the device automatically ignores differential voltages below 0.5V for undervoltage qualification. All electrical specs - including OVP accuracy, leakage, and REG performance - are validated across all supported configurations per BQ296202DSGR's datasheet test conditions.
BQ296202DSGR 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)
BQ296202DSGR FAQ
1.How can I place an order for BQ296202DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296202DSGR 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 BQ296202DSGR reliable?
The price and inventory of BQ296202DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296202DSGR is usually 5 days.
3.What payment methods are accepted for BQ296202DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296202DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296202DSGR?
BQ296202DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296202DSGR 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 BQ296202DSGR?
For technical support, including BQ296202DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296202DSGR requirements.
6.How does Aetrix verify that BQ296202DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296202DSGR 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 BQ296202DSGR meets industry standards.
7.What is the process for return or replacement of BQ296202DSGR?
All BQ296202DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296202DSGR, 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 BQ296202DSGR part is unused and in its original packaging.
Return procedure for BQ296202DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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