My Inquiry
My Account
Texas Instruments BQ296100DSGR
- Part No.:
- BQ296100DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296100DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,772
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ296100DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2- to 4-series Li-ion battery packs, featuring factory-programmed 4.35V overvoltage 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 protection in notebook PC battery management systems.
For engineers reviewing the BQ296100DSGR datasheet, BQ296100DSGR pinout, BQ296100DSGR application, or BQ296100DSGR equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The BQ296100DSGR independently monitors each cell voltage (V1–VSS through V4–V3) using precision analog comparators referenced to a factory-trimmed 4.35V OVP threshold. Upon detection of any cell exceeding this threshold, a fixed 6.5s internal delay 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 activated when any cell falls below the factory-set 2.5V undervoltage threshold - preventing battery drain during deep discharge. The device operates across –40°C to +110°C with supply current as low as 1.2µA when REG is disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.35V ±10mV at 25°C - enables precise cell voltage clamping without external calibration |
| OVP Delay Timer | 6.5s fixed (±20%) - provides deterministic fault response window before fuse activation |
| Regulated Output | 3.3V ±2% at 0–2mA load - powers RTC or low-power always-on circuits directly from battery stack |
| Supply Current | 4µA typical (REG enabled), 1.2µA typical (REG disabled) - extends battery shelf life in storage |
| Cell Input Leakage | <100nA per sense pin - minimizes measurement error and preserves cell balance |
| Operating Temp | –40°C to +110°C - supports industrial and automotive-grade battery pack environments |
| Package | 8-pin WSON, 2.00mm × 2.00mm - enables ultra-compact placement on space-constrained battery PCBs |
Pinout & Package
8-pin WSON (2mm × 2mm) package with exposed thermal pad (PWPD) recommended to be connected to VSS for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input tied to top of battery stack (max 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 prevent 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); used in 3- and 4-series configurations |
| V4 | Cell 4 sense input | Sense positive terminal of topmost cell (V4–V3); unused and shorted to V3 in 2- or 3-series stacks |
| OUT | Overvoltage fault output | CMOS active-high signal (0–VDD) driving NMOS gate to blow fuse; no external pull-up required |
| REG | Regulated supply output | 3.3V output (2mA max) with self-disable if any cell <2.5V; requires 0.47µF ceramic capacitor to VSS |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP threshold | 4.35V with ±10mV accuracy eliminates need for external voltage references or trimming resistors |
| Fixed-delay OV response | 6.5s deterministic timing ensures consistent fuse-blow behavior across production units |
| Self-disabling regulated output | Automatically disables 3.3V REG supply when any cell drops below 2.5V, preventing deep discharge damage |
| Ultra-low quiescent current | 1.2µA supply current with REG off extends battery shelf life beyond 10 years in storage |
| Cell-input leakage control | <100nA per Vx pin maintains cell voltage measurement integrity and avoids imbalance drift |
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: Second-level OV detector that triggers fuse blow only after sustained overvoltage (>6.5s), avoiding false trips from transient spikes. Use Value: Prevents thermal runaway by enabling irreversible power cutoff while preserving system-level communication via isolated REG supply to RTC. |
Use Scenario: Compact battery pack designs requiring minimal footprint and ultra-low standby current for extended sleep-mode operation. IC Role / Device Role / Timing Role: Regulated 3.3V source for always-on real-time clock and wake-up logic, automatically disabled during deep discharge to avoid battery depletion. Use Value: Eliminates need for separate LDO or supervisor IC, reducing BOM count and PCB area in thin-profile ultrabooks. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Safety-critical battery packs in portable diagnostic equipment where regulatory compliance demands redundant overvoltage protection. IC Role / Device Role / Timing Role: Independent hardware-based OV monitor with ±10mV accuracy and fixed delay, decoupled from firmware-controlled protection layers. Use Value: Meets IEC 62133 and UL 2054 requirements for fail-safe secondary protection without software dependency. |
Use Scenario: Standby battery systems in uninterruptible power supplies where long-term storage and reliable wake-up capability are essential. IC Role / Device Role / Timing Role: Maintains regulated 3.3V supply to microcontroller reset circuitry and status monitoring during grid outage, self-disabling only upon critical undervoltage. Use Value: Ensures UPS can autonomously initiate controlled shutdown or alert before battery exhaustion, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296103DSGR | OVP threshold = 4.50V (vs. 4.35V); same 6.5s delay, 3.3V REG, and WSON-8 package | Suitable for higher-voltage Li-ion chemistries (e.g., LiCoO₂ with elevated charge termination) | Select when battery chemistry requires tighter margin above standard 4.2V/cell charging. |
| BQ296113DSGR | OVP threshold = 4.35V (same), but 3.0s delay (vs. 6.5s); identical REG and package | Preferred for fast-response protection in high-power tools or drones where rapid fault isolation is critical | Choose when system-level safety analysis mandates shorter OV response time than 6.5s allows. |
Compared with BQ296100DSGR, BQ296103DSGR raises overvoltage trip point for compatibility with high-voltage cells, while BQ296113DSGR reduces delay for faster fault containment - both retain identical regulated output and pinout, enabling layout reuse with only configuration change.
Availability
BQ296100DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable devices requiring stable component supply across long product lifecycles.
Supply support for BQ296100DSGR 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 safety ICs.
The BQ296xxx family was designed specifically for second-level overvoltage protection and regulated auxiliary supply in multi-cell Li-ion battery packs - targeting high-reliability portable and industrial energy storage applications.
FAQ
What is the overvoltage protection threshold and accuracy of the BQ296100DSGR?
The BQ296100DSGR has a factory-programmed overvoltage threshold of 4.35V with ±10mV accuracy at 25°C. This tight tolerance ensures reliable cell voltage clamping without external calibration components. The BQ296100DSGR maintains this specification across its full operating temperature range (–40°C to +110°C), with worst-case drift of ±54mV at 110°C, making it suitable for demanding thermal environments.
How does the regulated output (REG) of the BQ296100DSGR behave during battery discharge?
The BQ296100DSGR's REG pin delivers a stable 3.3V output 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 rise above 2.55V (2.5V + 50mV hysteresis), the REG output re-enables. This self-disable function prevents excessive battery drain during storage or deep discharge, extending usable shelf life.
What is the purpose of the fixed 6.5-second delay timer in the BQ296100DSGR?
The BQ296100DSGR's fixed 6.5-second delay timer prevents false triggering from transient voltage spikes by requiring sustained overvoltage (≥4.35V) for the full duration before asserting the active-high OUT signal. This deterministic response ensures reliable fuse blow only during genuine overcharge conditions, improving system robustness in noisy electrical environments like notebook adapters or motor-driven UPS systems.
Can the BQ296100DSGR be used in 2-series, 3-series, and 4-series battery configurations?
Yes, the BQ296100DSGR supports 2-, 3-, and 4-series Li-ion stacks via its four independent cell sense inputs (V1–VSS, V2–V1, V3–V2, V4–V3). Unused inputs (e.g., V4 in a 2-series pack) are shorted to the adjacent lower pin per TI's layout guidance. All configurations share the same 4.35V OVP threshold, 6.5s delay, and 3.3V REG output - no configuration pins or external components are needed to adapt across series counts.
What package type and thermal considerations apply to the BQ296100DSGR?
The BQ296100DSGR uses an 8-pin WSON package (2.00mm × 2.00mm) with an exposed thermal pad (PWPD). Texas Instruments specifies RθJA = 62°C/W and recommends connecting PWPD directly to VSS on the PCB for optimal thermal dissipation and EMI reduction. This compact thermally enhanced package enables high-density placement in slim battery modules while maintaining safe junction temperatures under continuous 2mA REG load.
BQ296100DSGR 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)
BQ296100DSGR FAQ
1.How can I place an order for BQ296100DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296100DSGR 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 BQ296100DSGR reliable?
The price and inventory of BQ296100DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296100DSGR is usually 5 days.
3.What payment methods are accepted for BQ296100DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296100DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296100DSGR?
BQ296100DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296100DSGR 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 BQ296100DSGR?
For technical support, including BQ296100DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296100DSGR requirements.
6.How does Aetrix verify that BQ296100DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296100DSGR 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 BQ296100DSGR meets industry standards.
7.What is the process for return or replacement of BQ296100DSGR?
All BQ296100DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296100DSGR, 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 BQ296100DSGR part is unused and in its original packaging.
Return procedure for BQ296100DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ296100DSGR Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
