My Inquiry
My Account
Texas Instruments BQ296203DSGR
- Part No.:
- BQ296203DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296203DSGR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ296203DSGR 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, active-high OUT signal, and 3.3 V regulated output supply delivering up to 2 mA. It serves as second-level protection in notebook PC battery management systems.
For engineers reviewing the BQ296203DSGR datasheet, BQ296203DSGR pinout, BQ296203DSGR application, or BQ296203DSGR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options for battery pack overvoltage protection with regulated supply.
Technical Context
The BQ296203DSGR independently monitors each cell voltage (V1–VSS through V4–V3) against a factory-set 4.50 V overvoltage threshold with 300 mV hysteresis and ±10 mV accuracy at 25°C. Upon detection, it initiates a precise 6.5 s internal delay before asserting the CMOS-active-high OUT signal to trigger external FETs for fuse blow.
Its integrated 3.3 V regulated output (REG) delivers up to 2 mA with ±30 mV load regulation (0–2 mA), self-disables when any cell falls below factory-configured 2.5 V undervoltage threshold after 6 s delay, and draws only 4 µA quiescent current with REG enabled - dropping to 1.2 µA when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.50 V ±10 mV at 25°C - ensures precise cell voltage clamping without premature trip in multi-cell stacks |
| OVP Delay Timer | 6.5 s fixed (±20%) - provides reliable fault confirmation window before triggering fuse-blow circuitry |
| Regulated Output | 3.3 V ±30 mV (0–2 mA load) - powers RTC or low-power always-on circuits without external LDO |
| Quiescent Current | 4 µA (REG on), 1.2 µA (REG off) - minimizes battery drain during standby and deep discharge |
| Cell Input Leakage | <100 nA per Vx pin - preserves cell balance and avoids measurement error in high-impedance sensing networks |
| Operating Temp Range | –40°C to +110°C - supports operation in demanding portable and medical battery environments |
| Package | 8-pin WSON (2 mm × 2 mm) - enables compact placement on space-constrained battery pack PCBs |
Pinout & Package
8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad connected to VSS. Pin 1 is top-left corner (marking dot adjacent), pin numbering follows standard counter-clockwise sequence.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input (3–20 V); 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 | Cell 1 sense input | Sense voltage across lowest cell (V1–VSS); requires 1 kΩ/0.1 µF RC filter per TI layout guidelines |
| V2 | Cell 2 sense input | Sense voltage across second cell (V2–V1); identical filtering and routing requirements as V1 |
| V3 | Cell 3 sense input | Sense voltage across third cell (V3–V2); unused pins for 2- or 3-series configs must be shorted to adjacent lower Vx |
| V4 | Cell 4 sense input | Sense voltage across fourth cell (V4–V3); supports full 4-series monitoring; floating if unused |
| OUT | Overvoltage fault output | CMOS active-high signal; drives NMOS gate to short fuse to ground upon OVP confirmation |
| REG | Regulated supply output | 3.3 V output (2 mA max); requires 0.47 µF ceramic capacitor to VSS placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.50 V threshold with ±10 mV accuracy enables drop-in replacement without calibration |
| Fixed 6.5 s delay timer | Eliminates need for external timing components while ensuring robust fault confirmation before action |
| Self-disabling 3.3 V REG | Automatically shuts down regulated output when any cell drops below 2.5 V, preventing deep discharge damage |
| Ultra-low leakage inputs | <100 nA per cell sense pin maintains voltage balance and avoids false OVP/UV detection |
| Active-high CMOS OUT | Directly interfaces with standard NMOS FET gates without level-shifting or pull-up resistors |
Applications
| Notebook PC Battery Packs | Ultrabook Power Management |
|---|---|
Use Scenario: Integrated into multi-cell Li-ion battery packs to prevent overcharging during AC adapter charging or system-level power events. IC Role / Device Role / Timing Role: Second-level hardware OVP monitor that triggers fuse blow via NMOS gate drive after 6.5 s confirmation delay. Use Value: Prevents thermal runaway by enforcing strict 4.50 V/cell limit with ±10 mV accuracy - critical for UL/IEC 62133 compliance. |
Use Scenario: Powers real-time clock and microcontroller wake logic during sleep mode using regulated 3.3 V output. IC Role / Device Role / Timing Role: Dual-function protector: monitors cell voltages while supplying stable 3.3 V (2 mA) to always-on subsystems. Use Value: Eliminates need for separate LDO; self-disable at 2.5 V prevents battery depletion below safe cutoff voltage. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Ensures fail-safe battery protection in life-critical portable diagnostics equipment where firmware-based protection is insufficient. IC Role / Device Role / Timing Role: Hardware-enforced OVP guardrail operating independently of host MCU; asserts OUT within 6.5 s of violation. Use Value: Meets IEC 60601-1 risk management requirements for independent secondary protection with known timing behavior. |
Use Scenario: Monitors 4-series Li-ion strings in enterprise UPS modules during grid-fail recharge cycles. IC Role / Device Role / Timing Role: Cell-level voltage supervisor with 3.3 V REG powering communication ICs that report SOC/SOH to master controller. Use Value: 4 µA supply current extends backup runtime; 100 nA input leakage preserves long-term cell matching in float-charged systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection with regulated supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296212DSGR | Same 4.50 V OVP, but 3.0 s delay timer instead of 6.5 s; identical 3.3 V REG and pinout | Suitable for faster-response battery packs where shorter fault confirmation is acceptable | Select when system-level fault reaction time must be minimized and 3 s delay satisfies safety margin |
| BQ296223DSGR | Identical 4.50 V OVP and 6.5 s delay; same 3.3 V REG; differs only in UV threshold (2.5 V vs. 2.5 V - no functional difference) | No practical application difference; both meet same notebook/ultrabook requirements | Valid drop-in alternative with identical electrical behavior and qualification status |
Compared with BQ296203DSGR, BQ296212DSGR offers faster fault response (3 s vs. 6.5 s) at the cost of reduced noise immunity, while BQ296223DSGR is electrically identical - enabling sourcing flexibility without design change.
Availability
BQ296203DSGR 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 lifecycle support.
Supply support for BQ296203DSGR 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 and embedded processing technologies, with decades of leadership in battery management ICs.
The BQ296xxx family is designed specifically for second-level overvoltage protection in multi-cell Li-ion battery packs, integrating precision voltage monitoring, configurable delay timers, and regulated supply outputs to simplify pack-level safety architecture.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296203DSGR?
The BQ296203DSGR has a factory-programmed overvoltage protection threshold of 4.50 V with ±10 mV accuracy at 25°C and ±54 mV accuracy across –40°C to +110°C. This tight tolerance ensures reliable cell voltage clamping without nuisance tripping in high-precision battery applications such as ultrabooks and medical devices. The BQ296203DSGR uses internal trimming to achieve this specification without external calibration.
Does the BQ296203DSGR support 2-cell, 3-cell, and 4-cell battery configurations?
Yes, the BQ296203DSGR supports 2-series, 3-series, and 4-series Li-ion battery stacks. Its V1–V4 sense inputs allow full monitoring of up to four cells; unused higher-order pins (e.g., V3/V4 in a 2-cell pack) are shorted to the adjacent lower Vx pin per TI's design guidelines. All configurations use the same 4.50 V OVP threshold and 6.5 s delay timer defined for the BQ296203DSGR.
What is the function and voltage rating of the REG pin on the BQ296203DSGR?
The REG pin on the BQ296203DSGR provides a factory-configured 3.3 V regulated output capable of sourcing up to 2 mA. It features built-in short-circuit current limiting (4 mA) and self-disable functionality that turns off the output when any monitored cell voltage falls below 2.5 V for 6 s. The BQ296203DSGR requires a 0.47 µF ceramic capacitor between REG and VSS, placed adjacent to the pins, for stability and noise immunity.
How does the BQ296203DSGR handle undervoltage conditions?
The BQ296203DSGR monitors all cell voltages for undervoltage using a factory-set 2.5 V threshold (VUVREG) with 300 mV hysteresis and a 6 s detection delay. If any cell remains below 2.5 V for 6 s, the BQ296203DSGR disables its REG output to prevent excessive discharge. The regulated supply re-enables only after all cells exceed 2.5 V + 300 mV hysteresis, ensuring safe battery recovery before resuming power to downstream circuits.
What package type and thermal characteristics does the BQ296203DSGR use?
The BQ296203DSGR is housed in an 8-pin WSON package measuring 2.00 mm × 2.00 mm with an exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 32.5°C/W, enabling effective heat dissipation in compact battery pack layouts. The device operates across –40°C to +110°C ambient temperature and requires VSS to be connected first during assembly to avoid REG pin overstress - a critical handling requirement specified for the BQ296203DSGR.
BQ296203DSGR 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)
BQ296203DSGR FAQ
1.How can I place an order for BQ296203DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296203DSGR 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 BQ296203DSGR reliable?
The price and inventory of BQ296203DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296203DSGR is usually 5 days.
3.What payment methods are accepted for BQ296203DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296203DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296203DSGR?
BQ296203DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296203DSGR 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 BQ296203DSGR?
For technical support, including BQ296203DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296203DSGR requirements.
6.How does Aetrix verify that BQ296203DSGR is sourced from the original manufacturer or authorized distributors?
All BQ296203DSGR 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 BQ296203DSGR meets industry standards.
7.What is the process for return or replacement of BQ296203DSGR?
All BQ296203DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ296203DSGR, 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 BQ296203DSGR part is unused and in its original packaging.
Return procedure for BQ296203DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ296203DSGR 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…
