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Texas Instruments BQ296107DSGR
- Part No.:
- BQ296107DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296107DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,543
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Product details
Overview
BQ296107DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protection 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, 3.3 V regulated output (2 mA max), and 8-pin WSON (2 mm × 2 mm) package. It serves as second-level cell voltage monitor and fault signal generator in notebook PC battery packs.
For engineers reviewing the BQ296107DSGR datasheet, BQ296107DSGR pinout, BQ296107DSGR application, or BQ296107DSGR equivalent, key selection criteria include OVP threshold tolerance, regulated output voltage stability under load, self-disable behavior during cell undervoltage, low quiescent current (<4 µA with REG on), and compatibility with NMOS FET-based fuse control circuits.
Technical Context
The BQ296107DSGR implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.50 V OVP threshold. An internal fixed-delay timer (6.5 s) initiates upon any cell exceeding VOV and triggers the CMOS-active-high OUT pin to drive an external NMOS FET.
Its integrated 3.3 V regulated supply delivers up to 2 mA to always-on loads (e.g., RTC), with self-disable activated when any cell voltage falls below the factory-set 2.8 V UV threshold for ≥6 s. Input leakage per cell sense pin is <100 nA, and supply current drops to ~1.2 µA when REG is disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.50 V ±10 mV at 25°C - ensures precise cell overvoltage detection without false trips during transient spikes |
| OVP Delay Timer | 6.5 s fixed - provides controlled response window before fault assertion, allowing charger recovery or system intervention |
| Regulated Output | 3.3 V ±30 mV at 500 µA load - powers real-time clock or supervisor ICs with stable bias under varying battery stack voltage |
| Supply Current (REG on) | 4–6 µA at 0–60°C - enables multi-year battery pack shelf life without compromising protection responsiveness |
| Supply Current (REG off) | 1–2 µA at 0–60°C - minimizes drain during deep discharge or storage, preserving cell capacity |
| Cell Input Leakage | <100 nA per Vx pin - prevents significant voltage error accumulation across RC filter networks |
| Operating Temp Range | –40°C to +110°C - supports operation in thermally demanding battery pack environments including ultrabooks and medical devices |
Pinout & Package
Package: 8-pin WSON (2.00 mm × 2.00 mm), 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 (max 20 V); 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 bottom cell (V1–VSS); requires 1 kΩ/0.1 µF RC filter |
| V2 | Cell 2 sense input | Sense positive voltage of second cell (V2–V1); unused pins shorted to adjacent lower pin in 2-/3-series configs |
| V3 | Cell 3 sense input | Sense positive voltage of third cell (V3–V2); supports 3- and 4-series stacks |
| V4 | Cell 4 sense input | Sense positive voltage of top cell (V4–V3); required only in 4-series configurations |
| OUT | Overvoltage fault output | CMOS active-high signal driving NMOS gate to blow fuse; sinks ≤400 mV when inactive, sources ≥4.5 mA when active |
| REG | Regulated supply output | 3.3 V output (2 mA max); requires 0.47 µF ceramic capacitor to VSS; self-disables if any cell <2.8 V for ≥6 s |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.50 V threshold with ±10 mV accuracy at 25°C - eliminates external resistor network and calibration effort |
| Fixed OVP delay timer | 6.5 s delay - balances fast fault response with sufficient time for charger regulation recovery |
| Self-disable regulated output | Disables 3.3 V REG when any cell falls below 2.8 V for 6 s - prevents battery depletion during storage or deep discharge |
| Ultra-low quiescent current | 4 µA with REG enabled, 1.2 µA with REG disabled - extends battery pack shelf life and reduces standby power loss |
| Per-cell sense input leakage | <100 nA per Vx pin - maintains measurement integrity in high-impedance RC filter designs |
Applications
| Notebook PC Battery Pack | Ultrabook Power Management |
|---|---|
Use Scenario: Secondary overvoltage protection in slim-profile Li-ion battery packs where primary protection resides in the fuel gauge or charger IC. IC Role / Device Role / Timing Role: Monitors each cell independently; asserts active-high OUT after 6.5 s delay to trigger NMOS fuse blow circuit upon 4.50 V violation. Use Value: Prevents thermal runaway by enabling fast, deterministic fuse activation while avoiding nuisance trips from charge termination transients. |
Use Scenario: Enabling always-on RTC and supervisor functions in fanless ultrabooks with constrained battery space and strict power budgets. IC Role / Device Role / Timing Role: Provides stable 3.3 V supply to RTC during sleep modes; self-disables when pack voltage drops below 2.8 V/cell to preserve capacity. Use Value: Eliminates need for separate LDO or supervisor IC, reducing BOM count and PCB area in space-constrained designs. |
| Medical Portable Device | UPS Battery Backup Module |
Use Scenario: Ensuring safe operation of rechargeable Li-ion packs in Class II medical equipment requiring redundant overvoltage safeguards. IC Role / Device Role / Timing Role: Acts as hardware-enforced backup protector; operates independently of microcontroller firmware and communicates fault status via OUT pin. Use Value: Meets IEC 62368-1 safety requirements for secondary protection with verified ±10 mV OVP accuracy and thermal robustness to +110°C. |
Use Scenario: Protecting 4-series Li-ion strings in uninterruptible power supplies where long-term reliability and low self-discharge are critical. IC Role / Device Role / Timing Role: Continuously monitors cell balance and asserts fault signal to disconnect load/charger upon overvoltage; regulates 3.3 V for backup controller. Use Value: Maintains >10-year calendar life through ultra-low 1.2 µA REG-off current and minimal cell leakage loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296112DSGR | Same 4.50 V OVP threshold but 3.0 s delay timer instead of 6.5 s; identical 3.3 V REG and package | Suitable for systems requiring faster fault response, e.g., high-power tools with aggressive charge algorithms | Select BQ296112DSGR only if shorter delay is validated in system-level fault testing; otherwise BQ296107DSGR's 6.5 s provides broader margin. |
| BQ296203DSGR | Same 4.50 V OVP and 6.5 s delay, but 3.3 V REG with tighter 3.087–3.213 V tolerance (vs. 3.234–3.366 V); same WSON-8 package | Preferred for applications needing tighter REG tolerance, such as precision ADC reference biasing | Choose BQ296203DSGR when REG output stability under load is prioritized over cost; BQ296107DSGR remains optimal for RTC/low-power logic. |
Compared with BQ296107DSGR, BQ296112DSGR trades longer fault latency for faster response, while BQ296203DSGR improves REG voltage tightness at the expense of slightly higher cost-neither offers pin-to-pin or functional drop-in replacement without verifying delay timing or regulator load behavior in the target application.
Availability
BQ296107DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management subsystems, and medical portable device battery modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ296107DSGR 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 experience in battery protection and power system design.
The BQ296xxx family was designed specifically for second-level overvoltage protection and regulated auxiliary supply in multi-cell Li-ion battery packs used in portable computing and medical applications.
FAQ
What is the factory-programmed overvoltage threshold and delay timer for BQ296107DSGR?
The BQ296107DSGR has a factory-programmed overvoltage threshold of 4.50 V and a fixed delay timer of 6.5 seconds. These values are laser-trimmed during manufacturing and cannot be modified in-circuit. The ±10 mV accuracy at 25°C ensures reliable detection without external calibration, and the 6.5 s delay allows time for charger regulation recovery before asserting the fault signal via the OUT pin.
How does the regulated 3.3 V output (REG pin) behave during battery discharge?
The BQ296107DSGR's REG pin delivers a stable 3.3 V output up to 2 mA, but self-disables when any monitored cell voltage falls below the factory-set 2.8 V undervoltage threshold for ≥6 seconds. Once disabled, REG remains off until all cell voltages exceed 2.8 V + 300 mV hysteresis. This prevents excessive battery drain during storage or deep discharge, extending pack shelf life.
What is the maximum allowable supply voltage on the VDD pin of BQ296107DSGR?
The absolute maximum rating for VDD on the BQ296107DSGR is 30 V, but the recommended operating range is 3 V to 20 V. For 4-series Li-ion packs, VDD connects to the top of the stack and must remain within this range - typical maximum stack voltage is ~16.8 V (4 × 4.2 V). Exceeding 20 V risks violating recommended conditions and may impact long-term reliability.
Can BQ296107DSGR be used in a 2-cell or 3-cell battery configuration?
Yes, the BQ296107DSGR supports 2-, 3-, and 4-series Li-ion configurations. Unused sense pins (e.g., V4 in a 3-cell pack) must be shorted to the adjacent lower pin (V3), and VSS must be connected first during assembly. The device automatically ignores differential voltages below 0.5 V for undervoltage qualification, ensuring robust operation across all supported topologies.
What external components are required for stable operation of BQ296107DSGR?
Required external components for BQ296107DSGR include: (1) 1 kΩ / 0.1 µF RC filters on each Vx sense pin; (2) 0.47 µF ceramic capacitor from REG to VSS; (3) optional 5 Ω series resistor with REG capacitor if VSS connection sequence cannot be guaranteed; and (4) 100 Ω pull-up on OUT if interfacing with open-drain logic. No external programming resistors are needed - all thresholds and delays are factory-set.
BQ296107DSGR 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)
BQ296107DSGR FAQ
1.How can I place an order for BQ296107DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296107DSGR 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 BQ296107DSGR reliable?
The price and inventory of BQ296107DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296107DSGR is usually 5 days.
3.What payment methods are accepted for BQ296107DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296107DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296107DSGR?
BQ296107DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296107DSGR 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 BQ296107DSGR?
For technical support, including BQ296107DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296107DSGR requirements.
6.How does Aetrix verify that BQ296107DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296107DSGR 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 BQ296107DSGR meets industry standards.
7.What is the process for return or replacement of BQ296107DSGR?
All BQ296107DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296107DSGR, 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 BQ296107DSGR part is unused and in its original packaging.
Return procedure for BQ296107DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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