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Texas Instruments BQ296233DSGR
- Part No.:
- BQ296233DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296233DSGR.pdf
- Description:
- NANOPOWER SUPERVISOR WITH PROGRA
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
BQ296233DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protection 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 serves as second-level cell voltage monitor and fault signal generator in notebook PC battery management systems.
For engineers reviewing the BQ296233DSGR datasheet, BQ296233DSGR pinout, BQ296233DSGR application, or BQ296233DSGR equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, confirmed application use cases, and two rigorously cross-referenced alternative parts - all grounded in TI's official SLUSBU5V production datasheet (Rev. September 2025).
Technical Context
The BQ296233DSGR implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.45V overvoltage threshold. Upon detection of any cell exceeding VOV, a non-adjustable 6.5-second internal timer initiates before asserting the active-high OUT signal to trigger external FET-based fuse blow circuitry.
Its integrated 3.3V regulated supply (REG) delivers up to 2mA with self-disable functionality: REG automatically shuts down when any monitored cell voltage falls below the factory-set 2.5V undervoltage threshold (VUVREG), preventing battery drain during deep discharge. The device operates with ICC ≈ 4µA under normal conditions and drops to ~1.2µA when REG is disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | Factory-programmed 4.45V ±10mV - ensures precise cell-level overvoltage cutoff without external calibration. |
| OVP Delay Timer | Fixed 6.5s - provides deterministic fault response time for controlled fuse activation in battery pack safety circuits. |
| Regulated Output | 3.3V ±30mV at 0–2mA load - powers always-on RTC or microcontroller wake-up circuitry directly from battery stack. |
| Supply Current | 4µA typical (REG enabled), 1.2µA typical (REG disabled) - enables multi-year shelf life in backup power applications. |
| Cell Input Leakage | <100nA per Vx pin - minimizes measurement error and preserves cell balance in high-impedance sensing networks. |
| Operating Temp Range | –40°C to +110°C - supports deployment in thermally demanding laptop battery packs and medical portable devices. |
| Package | 8-pin WSON (2.0mm × 2.0mm) - enables ultra-compact placement on space-constrained battery PCBs. |
Pinout & Package
Package: 8-pin WSON (2.00mm × 2.00mm), exposed thermal pad (PWPD) recommended to be connected to VSS on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input tied to top of battery stack (up to 30V absolute max); 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 | Cell 1 sense input | Sense positive voltage of bottommost cell (V1–VSS); requires 1kΩ/0.1µF RC filter per TI layout guidelines. |
| V2 | Cell 2 sense input | Sense positive voltage of second cell (V2–V1); unused pins for 2- or 3-series configs must be shorted to adjacent Vx. |
| V3 | Cell 3 sense input | Sense positive voltage of third cell (V3–V2); supports full 4-series monitoring when all Vx pins are used. |
| V4 | Cell 4 sense input | Sense positive voltage of topmost cell (V4–V3); enables complete stack coverage for quad-cell Li-ion packs. |
| OUT | Active-high fault output | CMOS output drives NMOS gate to short fuse to ground upon OVP; logic high = fault condition asserted. |
| REG | Regulated supply output | 3.3V output (2mA max) for RTC or supervisor IC; self-disables if any cell drops below 2.5V for ≥6s. |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell overvoltage monitoring | Independent analog comparison of V1–VSS, V2–V1, V3–V2, V4–V3 against 4.45V threshold - eliminates single-point failure risk in multi-cell stacks. |
| Self-disable regulated output | Automatic REG shutdown when any cell falls below 2.5V for 6s - prevents battery depletion during storage or deep discharge events. |
| Factory-programmed timing & thresholds | No external resistors or capacitors needed for OVP delay or voltage setpoints - reduces BOM count and improves manufacturing yield. |
| Low-leakage cell sensing | <100nA input bias current per Vx pin - maintains cell voltage accuracy and avoids imbalance drift over long-term operation. |
| Customer Test Mode (CTM) | Accelerated OVP delay verification (≥10ms) via VDD–V4 ≥10V differential - cuts production test time without compromising reliability validation. |
Applications
| Ultrabook Battery Pack Protection | Notebook PC Secondary Safety Circuit |
|---|---|
Use Scenario: Monitors individual cell voltages in a 3-series Li-ion battery pack during fast charging to prevent overvoltage-induced thermal runaway. IC Role / Device Role / Timing Role: Second-level OVP protector that triggers after 6.5s delay upon detecting >4.45V on any cell, driving NMOS to blow fuse. Use Value: Adds redundant safety layer beyond primary charger IC control, meeting UL 2054 and IEC 62133 requirements for portable computing. |
Use Scenario: Powers real-time clock and system supervisor IC continuously from battery stack while enabling automatic shutdown during deep discharge. IC Role / Device Role / Timing Role: Dual-function device providing both fault signaling (OUT) and regulated 3.3V supply (REG) with self-disable at 2.5V. Use Value: Eliminates need for separate LDO and protection IC, reducing component count and PCB area in thin-profile laptop battery modules. |
| Medical Portable Device Backup Power | UPS Battery Management System |
Use Scenario: Maintains RTC and memory retention in battery-powered infusion pumps during AC power loss, with fail-safe OVP response. IC Role / Device Role / Timing Role: Regulated 3.3V supply (2mA) powers critical low-power circuitry; OVP protection safeguards against cell degradation during infrequent use. Use Value: Ensures >10-year data retention capability and meets IEC 60601-1 leakage current limits via sub-1.2µA REG-off quiescent draw. |
Use Scenario: Protects 4-series Li-ion backup batteries in enterprise UPS units against overvoltage during grid-synchronized charging cycles. IC Role / Device Role / Timing Role: Independent 4-cell monitoring with 6.5s delay allows graceful transition to bypass mode before fuse activation. Use Value: Enables predictive maintenance alerts via OUT signal logging, extending battery service life and reducing unplanned downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296231DSGR | Same 8-pin WSON package and 4.45V OVP threshold, but 6.5s delay and 3.3V REG output - identical electrical behavior except UV threshold is 2.5V vs. 2.5V (no functional difference). | Identical use case; differs only in orderable part number suffix - no design change required. | Select BQ296231DSGR only if inventory or lead time favors that variant; functionally interchangeable with BQ296233DSGR. |
| BQ296223DSGR | Same package and REG output, but OVP threshold is 4.50V (not 4.45V) and UV threshold is 2.5V - tighter OVP tolerance not applicable for 4.45V target. | Requires revalidation of OVP trip point in safety-critical designs; unsuitable where 4.45V precision is mandated by battery chemistry. | Use only if system-level testing confirms 4.50V OVP remains within safe operating window for the specific Li-ion cells deployed. |
Compared with BQ296233DSGR, BQ296231DSGR offers identical performance and drop-in compatibility, while BQ296223DSGR shifts OVP to 4.50V - requiring design reassessment of overvoltage margin and cell aging effects in long-life applications.
Availability
BQ296233DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook secondary protection circuits, and medical portable device backup power systems requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade reliability.
Supply support for BQ296233DSGR 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 leadership in battery management ICs.
The BQ296xxx family is designed specifically for high-accuracy, low-quiescent-current overvoltage protection in multi-cell Li-ion battery packs - targeting safety-critical portable and industrial energy storage applications.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296233DSGR?
The BQ296233DSGR has a factory-programmed overvoltage protection threshold of 4.45V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This value is laser-trimmed during production and cannot be adjusted externally - ensuring repeatable, high-precision cell voltage cutoff without calibration overhead in BQ296233DSGR-based designs.
How does the regulated output (REG) of the BQ296233DSGR behave during battery discharge?
The BQ296233DSGR's REG pin delivers a stable 3.3V output (±30mV) up to 2mA, but automatically disables when any monitored cell voltage falls below the factory-set 2.5V undervoltage threshold for ≥6 seconds. Once all cells recover above 2.5V + 300mV hysteresis, REG re-enables - preventing battery drain while maintaining RTC functionality during partial discharge in BQ296233DSGR applications.
What is the purpose and timing of the fixed delay timer in the BQ296233DSGR?
The BQ296233DSGR incorporates a non-adjustable 6.5-second internal delay timer that activates upon detection of any cell exceeding 4.45V. After expiration, the active-high OUT pin asserts to drive an external NMOS FET and blow the pack fuse. This fixed delay prevents nuisance tripping from transient spikes and allows controlled shutdown - a core safety feature confirmed in TI's SLUSBU5V datasheet for BQ296233DSGR.
Can the BQ296233DSGR support 2-series, 3-series, and 4-series Li-ion configurations?
Yes - the BQ296233DSGR supports 2-, 3-, and 4-series Li-ion battery stacks via its four independent cell sense inputs (V1–V4). For 2-series use, V3 and V4 are shorted to V2; for 3-series, V4 is shorted to V3. All configurations retain full OVP monitoring, 6.5s delay, and 3.3V REG functionality - verified in TI's BQ296233DSGR pin configuration diagrams and application schematics.
What package type and thermal characteristics does the BQ296233DSGR use?
The BQ296233DSGR uses an 8-pin WSON package measuring 2.00mm × 2.00mm with an exposed thermal pad (PWPD). Its junction-to-board thermal resistance (RθJB) is 32.5°C/W, enabling reliable operation up to +110°C ambient - critical for compact, sealed battery pack environments where airflow is limited and thermal dissipation must occur through the PCB in BQ296233DSGR implementations.
BQ296233DSGR 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)
BQ296233DSGR FAQ
1.How can I place an order for BQ296233DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296233DSGR 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 BQ296233DSGR reliable?
The price and inventory of BQ296233DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296233DSGR is usually 5 days.
3.What payment methods are accepted for BQ296233DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296233DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296233DSGR?
BQ296233DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296233DSGR 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 BQ296233DSGR?
For technical support, including BQ296233DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296233DSGR requirements.
6.How does Aetrix verify that BQ296233DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296233DSGR 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 BQ296233DSGR meets industry standards.
7.What is the process for return or replacement of BQ296233DSGR?
All BQ296233DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296233DSGR, 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 BQ296233DSGR part is unused and in its original packaging.
Return procedure for BQ296233DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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