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Texas Instruments BQ296224DSGR
- Part No.:
- BQ296224DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296224DSGR.pdf
- Description:
- IC BATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BQ296224DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.50 V OVP threshold, 6.5 s fixed delay timer, ±10 mV OVP accuracy, 3.0 V regulated output (2 mA max), and 8-pin WSON (2 mm × 2 mm) package. It monitors each cell independently and drives external FETs to blow fuses during overvoltage faults - used in notebook PC battery protection circuits.
For engineers reviewing the BQ296224DSGR datasheet, BQ296224DSGR pinout, BQ296224DSGR application, or BQ296224DSGR equivalent, key selection criteria include verified OVP threshold (4.50 V), regulated LDO output voltage (3.0 V), self-disable undervoltage cutoff (2.5 V), ultra-low quiescent current (1.2 µA with REG off), and WSON-8 thermal performance (RθJA = 62 °C/W).
Technical Context
The BQ296224DSGR implements independent per-cell voltage monitoring using precision analog comparators referenced to a factory-trimmed bandgap, triggering a fixed 6.5 s internal delay before asserting the active-high OUT signal. Its regulated 3.0 V supply uses an integrated LDO with short-circuit current limiting (4 mA) and self-disable logic that disables REG when any cell falls below 2.5 V for ≥6 s.
It operates across –40°C to +110°C with input voltage range up to 30 V on VDD and differential cell inputs (Vn–Vn−1) up to 5 V, supporting 2-, 3-, and 4-series configurations via configurable V1–V4 sense pins and VSS reference. The device includes Customer Test Mode (CTM) for accelerated OV delay validation at >10 V VDD–V4 differential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.50 V ±10 mV - factory-programmed precision trip point for Li-ion cell overvoltage detection |
| OVP Delay Timer | 6.5 s ±1.3 s - fixed internal delay before OUT assertion prevents false trips from transient spikes |
| Regulated Output | 3.0 V ±60 mV @ 0–2 mA - stable supply for RTC or always-on circuitry; self-disables below 2.5 V cell voltage |
| Quiescent Current | 1.2 µA (REG disabled) / 4 µA (REG enabled) - enables multi-year battery shelf life in backup systems |
| Input Leakage | <100 nA per cell input - minimizes parasitic discharge in high-impedance battery stacks |
| Package | WSON-8 (2.0 mm × 2.0 mm, 0.5 mm pitch) - compact footprint compatible with space-constrained battery pack PCBs |
| Operating Temp | –40°C to +110°C - supports industrial and automotive-grade battery management environments |
Pinout & Package
Package: 8-pin WSON (2.00 mm × 2.00 mm), exposed thermal pad (PWPD) recommended to be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20 V); powers internal circuitry and REG LDO; 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 monitoring (V1–VSS), (V2–V1), (V3–V2), (V4–V3); unused pins shorted to adjacent lower pin |
| OUT | Overvoltage fault output | CMOS active-high signal (0–VDD); drives NMOS gate to short fuse to ground during OVP event |
| REG | Regulated supply output | 3.0 V LDO output (0–2 mA); includes short-circuit protection and self-disable below 2.5 V cell voltage |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell OVP monitoring | Independent analog sensing of all 4 cells ensures precise stack-level protection without shared reference errors |
| Factory-programmed OVP | 4.50 V threshold with ±10 mV accuracy eliminates external resistor networks and calibration overhead |
| Self-disable REG output | Automatically shuts down 3.0 V supply when any cell drops ≤2.5 V for ≥6 s - prevents deep discharge damage |
| Ultra-low ICC with REG off | 1.2 µA supply current extends battery shelf life in storage or standby modes |
| Customer Test Mode (CTM) | Enables rapid 15 ms OV delay verification during production test by applying >10 V differential between VDD and V4 |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Secondary overvoltage protection in multi-cell Li-ion battery modules where primary protection resides in the fuel gauge or charger IC. IC Role / Device Role / Timing Role: Standalone OVP monitor that asserts active-high OUT after 6.5 s delay to trigger external fuse-blowing FETs. Use Value: Prevents thermal runaway by cutting power path within defined safety window, independent of host system firmware. |
Use Scenario: Compact battery pack with tight thermal constraints requiring minimal PCB area and ultra-low standby current. IC Role / Device Role / Timing Role: Provides regulated 3.0 V supply for real-time clock and microcontroller retention memory while self-disabling below 2.5 V/cell. Use Value: Eliminates need for discrete LDO and enables >10-year shelf life due to 1.2 µA quiescent current with REG off. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Safety-critical battery packs in portable diagnostic equipment requiring IEC 62368-1 compliant secondary protection. IC Role / Device Role / Timing Role: Independent hardware-based OVP layer with ±10 mV accuracy and hysteresis (250–400 mV) to avoid oscillation near trip point. Use Value: Meets functional safety requirements for redundant protection without software dependency or single-point failure risk. |
Use Scenario: Rack-mounted UPS units with 4-series Li-ion strings needing reliable long-term operation under variable load and temperature. IC Role / Device Role / Timing Role: Monitors individual cell voltages across –40°C to +110°C ambient and triggers fuse blow via OUT if any cell exceeds 4.50 V. Use Value: Ensures consistent OVP response across full temperature range with <±54 mV drift at 110°C - critical for field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296223DSGR | Same 4.50 V OVP, 6.5 s delay, and 3.3 V REG output - differs only in regulated voltage (3.3 V vs. 3.0 V) | Requires redesign of downstream 3.0 V circuitry; not drop-in for 3.0 V loads | Select only if system requires 3.3 V regulated supply and can tolerate higher output voltage tolerance |
| BQ296231DSGR | Same 4.50 V OVP and 6.5 s delay, but 3.3 V REG output and 4.60 V OVP option - no functional difference for 4.50 V use case | Identical pinout and timing; 3.3 V REG may require level-shifting for 3.0 V peripherals | Valid alternative if 3.3 V REG is acceptable and board layout accommodates same WSON-8 footprint |
Compared with BQ296224DSGR, BQ296223DSGR delivers 3.3 V instead of 3.0 V - requiring voltage translation for 3.0 V loads - while BQ296231DSGR offers identical OVP specs but shifts REG to 3.3 V and adds marginally higher 4.60 V OVP option, making it suitable only when 3.0 V regulation is not mandatory.
Availability
BQ296224DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable devices requiring stable component supply with guaranteed long-term availability.
Supply support for BQ296224DSGR 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 over 50 years of innovation in battery management solutions.
The BQ296xxx family is designed specifically for second-level overvoltage protection in multi-cell Li-ion battery packs, delivering precision voltage monitoring, regulated auxiliary supply, and robust fault signaling in ultra-small WSON packages.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296224DSGR?
The BQ296224DSGR has a factory-programmed overvoltage protection threshold of 4.50 V with ±10 mV accuracy at 25°C and ±54 mV maximum drift across –40°C to +110°C. This precision eliminates need for external calibration and ensures reliable cell-level protection in demanding thermal environments.
Does the BQ296224DSGR provide a regulated output, and what are its specifications?
Yes, the BQ296224DSGR provides a 3.0 V regulated output (REG pin) with ±60 mV tolerance over 0–2 mA load and operating temperature. It includes short-circuit current limiting (4 mA), self-disable logic that turns off REG when any cell voltage falls below 2.5 V for ≥6 s, and requires a 0.47 µF ceramic capacitor for stability.
What is the function of the OUT pin on the BQ296224DSGR, and how is it driven?
The OUT pin on the BQ296224DSGR is an active-high CMOS output that asserts after a fixed 6.5 s delay upon detection of any cell overvoltage condition. It sources up to 4.5 mA and is designed to drive the gate of an external NMOS FET to short the fuse to ground, enabling battery pack power cutoff using charger or pack current.
How does the BQ296224DSGR handle undervoltage conditions, and what is the self-disable behavior?
The BQ296224DSGR self-disables its 3.0 V REG output when any monitored cell voltage falls below the factory-programmed 2.5 V undervoltage threshold for ≥6 s (tUVDELAY). REG re-enables only after all cells exceed 2.5 V + 300 mV hysteresis, preventing deep discharge and protecting battery health in storage or low-power states.
What package type and thermal characteristics does the BQ296224DSGR use?
The BQ296224DSGR uses an 8-pin WSON package (2.0 mm × 2.0 mm) with exposed thermal pad (PWPD). Its thermal resistance is RθJA = 62 °C/W, RθJB = 32.5 °C/W, and RθJC(bot) = 10 °C/W - enabling efficient heat dissipation in compact battery pack layouts without heatsinks.
BQ296224DSGR 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)
BQ296224DSGR FAQ
1.How can I place an order for BQ296224DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296224DSGR 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 BQ296224DSGR reliable?
The price and inventory of BQ296224DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296224DSGR is usually 5 days.
3.What payment methods are accepted for BQ296224DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296224DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296224DSGR?
BQ296224DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296224DSGR 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 BQ296224DSGR?
For technical support, including BQ296224DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296224DSGR requirements.
6.How does Aetrix verify that BQ296224DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296224DSGR 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 BQ296224DSGR meets industry standards.
7.What is the process for return or replacement of BQ296224DSGR?
All BQ296224DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296224DSGR, 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 BQ296224DSGR part is unused and in its original packaging.
Return procedure for BQ296224DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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