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Texas Instruments BQ296232DSGR
- Part No.:
- BQ296232DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296232DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BQ296232DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.55V OVP threshold, 6.5s fixed delay timer, 3.0V regulated output (±1.5% accuracy), ±10mV OVP detection accuracy, and <100nA per-cell input leakage. It serves as second-level protection in notebook PC battery management systems.
For engineers reviewing the BQ296232DSGR datasheet, BQ296232DSGR pinout, BQ296232DSGR application, or BQ296232DSGR equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, and precise cell-voltage monitoring specifications required for safe, reliable pack-level fault response design.
Technical Context
The BQ296232DSGR independently monitors up to four differential cell voltages (V1–VSS, V2–V1, V3–V2, V4–V3) against a factory-trimmed 4.55V overvoltage threshold with ±10mV accuracy at 25°C and 300mV hysteresis. Upon detection, it initiates a fixed 6.5s internal delay before asserting the active-high OUT signal to trigger external FET-based fuse blow.
Its integrated 3.0V regulated supply delivers up to 2mA with self-disable activation when any monitored cell voltage drops below the factory-set 3.0V undervoltage threshold (VUVREG), with 6s disable delay and 300mV hysteresis-ensuring RTC or always-on circuit power is cut only during genuine deep-discharge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.55V ±10mV at 25°C; enables precise cell-level overcharge cutoff without false triggers under thermal drift. |
| OVP Delay Timer | 6.5s fixed (±20%); provides deterministic fault response window for controlled fuse blow via external NMOS. |
| Regulated Output | 3.0V ±1.5% at 0–2mA load; powers RTC or supervisor ICs with stable bias independent of pack voltage. |
| Supply Current (REG on) | 4µA typical at TA = 0–60°C; minimizes parasitic drain during normal pack standby operation. |
| Per-Cell Input Leakage | <100nA; prevents measurable voltage imbalance accumulation across series cells over time. |
| Undervoltage Threshold | 3.0V ±50mV at 25°C; triggers REG disable only after sustained cell depletion, preserving runtime margin. |
| Operating Temp Range | –40°C to +110°C ambient; supports deployment in thermally demanding laptop battery enclosures. |
Pinout & Package
8-pin WSON package (2.00mm × 2.00mm, 0.5mm pitch) with exposed thermal pad connected to VSS. Pin 1 is top-left corner (VDD), pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20V); connects to top of battery 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 prevent REG damage. |
| V1–V4 | Cell voltage sense inputs | Differential inputs for 4-series stacks; unused pins (e.g., V4 in 2-series) shorted to adjacent lower pin. |
| OUT | Overvoltage fault signal | CMOS active-high output; drives gate of NMOS FET to short fuse to ground upon OVP confirmation. |
| REG | Regulated supply output | 3.0V output (max 2mA); requires 0.47µF ceramic capacitor to VSS; self-disables if any cell <3.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.55V threshold with ±10mV accuracy ensures consistent overcharge protection without calibration. |
| Fixed 6.5s OVP delay | Eliminates external timing components and guarantees repeatable fault response across temperature. |
| 3.0V regulated output | Stable 2mA supply for RTC or microcontroller backup rails, with automatic shutdown below 3.0V cell voltage. |
| Ultra-low quiescent current | 4µA supply current (REG on) extends shelf life and reduces standby drain in powered-off devices. |
| Per-cell leakage <100nA | Maintains voltage balance across series cells over months of storage without active balancing. |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Secondary overvoltage protection layer in multi-cell Li-ion battery modules where primary protection resides in the fuel gauge or charger IC. IC Role / Device Role / Timing Role: Monitors individual cell voltages in real time; asserts active-high OUT after 6.5s delay to trigger fuse blow if any cell exceeds 4.55V. Use Value: Prevents thermal runaway by enforcing strict 4.55V per-cell ceiling, validated across –40°C to +110°C operating range. |
Use Scenario: Providing regulated 3.0V bias to real-time clock (RTC) and system supervisor circuits during deep sleep or hibernation modes. IC Role / Device Role / Timing Role: Delivers stable 3.0V output up to 2mA while automatically disabling when lowest cell falls below 3.0V for >6s. Use Value: Eliminates need for separate LDO; extends RTC uptime without risking cell over-discharge or voltage collapse. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Ensuring fail-safe battery protection in Class II medical equipment where single-point failure must not compromise patient safety. IC Role / Device Role / Timing Role: Acts as hardware-enforced secondary OVP with deterministic 6.5s delay-immune to firmware faults or communication loss. Use Value: Meets IEC 62368-1 requirements for redundant overvoltage protection with verified ±10mV accuracy and 300mV hysteresis. |
Use Scenario: Maintaining auxiliary power to control logic and status indicators during extended AC outage in line-interactive UPS units. IC Role / Device Role / Timing Role: Supplies 3.0V to MCU and LED drivers while self-disabling only after confirmed 3.0V cell undervoltage for 6s. Use Value: Prevents brownout resets and false low-battery alarms by sustaining regulated rail until true end-of-discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296231DSGR | 4.60V OVP threshold (vs. 4.55V), same 6.5s delay and 3.3V REG output | Suitable for higher-voltage Li-ion chemistries (e.g., NMC with 4.6V max charge) | Select when tighter upper voltage margin is needed; verify compatibility with existing fuse blow energy budget. |
| BQ296224DSGR | 4.50V OVP threshold, 6.5s delay, 3.0V REG output (same REG spec) | Preferred for conservative overvoltage guardbanding in legacy 4.2V nominal packs | Choose for backward compatibility with designs previously using 4.50V OVP; identical pinout and layout. |
Compared with BQ296232DSGR, BQ296231DSGR raises OVP by 50mV for enhanced headroom with high-voltage cells, while BQ296224DSGR lowers OVP by 50mV for stricter safety margins-both retain identical 3.0V REG, 6.5s delay, and WSON-8 footprint.
Availability
BQ296232DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management subsystems, and medical portable device protection requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for BQ296232DSGR 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 delivering analog and embedded processing solutions with emphasis on reliability, precision, and power efficiency for industrial, automotive, and computing applications.
The BQ296xxx family is designed specifically for second-level overvoltage protection and regulated auxiliary supply in multi-cell Li-ion battery packs-targeting applications where hardware-enforced safety and ultra-low quiescent current are critical.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296232DSGR?
The BQ296232DSGR has a factory-programmed overvoltage protection threshold of 4.55V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This tight tolerance ensures reliable cell-level overcharge cutoff without premature triggering, directly supporting safety-critical battery pack designs compliant with UL 2054 and IEC 62133.
How does the regulated 3.0V output of the BQ296232DSGR behave during battery discharge?
The BQ296232DSGR's 3.0V regulated output remains active until any monitored cell voltage falls below its factory-set 3.0V undervoltage threshold for 6 seconds, after which it self-disables. The output re-enables only when all cells exceed 3.0V + 300mV hysteresis, preventing oscillation near the cutoff point and ensuring clean power removal for RTC or supervisor circuits.
What is the function of the OUT pin on the BQ296232DSGR and how is it driven?
The OUT pin on the BQ296232DSGR is a CMOS active-high output that transitions to logic high after a fixed 6.5s delay upon detection of any cell exceeding 4.55V. It sources up to 4.5mA and is intended to drive the gate of an external NMOS FET, creating a low-impedance path to ground for fuse blow-enabling hardware-enforced, firmware-independent overvoltage shutdown.
Does the BQ296232DSGR require external passive components for basic operation?
Yes-the BQ296232DSGR requires external 0.47µF ceramic capacitor on the REG pin to VSS for stability, 0.1µF capacitors on each Vx sense pin for noise filtering, and RC networks (1kΩ/0.1µF typical) on VDD and cell inputs. These components are mandatory per TI's validated layout; omitting them degrades OVP accuracy and may cause false triggering or regulator instability.
What package type and thermal characteristics does the BQ296232DSGR use?
The BQ296232DSGR uses an 8-pin WSON package (2.00mm × 2.00mm, 0.5mm pitch) with exposed thermal pad soldered to VSS. Its junction-to-board thermal resistance (RθJB) is 32.5°C/W, enabling reliable operation at 110°C ambient when mounted on standard 2-layer PCBs with adequate copper pour-critical for compact, high-density battery pack layouts.
BQ296232DSGR 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)
BQ296232DSGR FAQ
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Please submit a Request for Quotation (RFQ) for BQ296232DSGR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of BQ296232DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296232DSGR is usually 5 days.
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Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
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6.How does Aetrix verify that BQ296232DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296232DSGR 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 BQ296232DSGR meets industry standards.
7.What is the process for return or replacement of BQ296232DSGR?
All BQ296232DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296232DSGR, 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 BQ296232DSGR part is unused and in its original packaging.
Return procedure for BQ296232DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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