My Inquiry
My Account
Texas Instruments BQ296217DSGT
- Part No.:
- BQ296217DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ296217DSGT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ296217DSGT from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.55V OVP threshold, 6.5s fixed delay timer, ±10mV OVP accuracy, 3.3V regulated output (2mA max), and 8-pin WSON (2mm × 2mm) package. It monitors each cell independently and drives external FETs to blow fuses during overvoltage faults in notebook PC battery packs.
For engineers reviewing the BQ296217DSGT datasheet, BQ296217DSGT pinout, BQ296217DSGT application, or BQ296217DSGT equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, leakage current specs (<100nA/cell), and precise alternative part comparisons - all grounded in TI's production-grade SLUSBU5V documentation.
Technical Context
The BQ296217DSGT implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to a factory-trimmed 4.55V overvoltage threshold with 300mV hysteresis. Detection triggers a fixed 6.5-second internal delay before asserting the active-high OUT signal to control external protection FETs.
Its integrated 3.3V regulated supply delivers up to 2mA while incorporating self-disable functionality: REG shuts down when any cell voltage drops below the factory-set 2.8V undervoltage threshold for ≥6 seconds, preventing battery drain. The device draws only 4µA (REG on) or 1.2µA (REG off) under normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.55V ±10mV at 25°C; enables precise cell-level overvoltage cutoff without false trips in multi-cell stacks. |
| OVP Delay Timer | 6.5s fixed (not adjustable); provides deterministic fault response time for fuse-blowing sequence coordination. |
| Regulated Output | 3.3V ±30mV at 500µA load; powers always-on RTC circuits with stable supply even during partial discharge. |
| Supply Current | 4µA typical with REG enabled; ensures minimal quiescent drain on battery during long-term storage. |
| Cell Input Leakage | <100nA per Vx pin; preserves cell voltage balance and avoids measurement error in high-impedance sensing networks. |
| UV Self-Disable Threshold | 2.8V ±50mV; prevents REG from loading depleted cells, extending usable battery capacity and safety margin. |
| Operating Temp Range | –40°C to +110°C; supports deployment in thermally demanding laptop battery packs and medical backup systems. |
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 (3–20V); powers internal circuitry and supplies REG output stage. |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; must be connected first during assembly to avoid REG damage. |
| V1 | Cell sense input | Sense positive voltage of bottommost cell (V1–VSS); requires RC filter for noise immunity. |
| V2 | Cell sense input | Sense positive voltage of second cell (V2–V1); supports 2-, 3-, or 4-series configurations. |
| V3 | Cell sense input | Sense positive voltage of third cell (V3–V2); unused pins shorted to adjacent lower Vx in reduced-cell stacks. |
| V4 | Cell sense input | Sense positive voltage of topmost cell (V4–V3); enables full 4-series monitoring capability. |
| OUT | Active-high fault output | CMOS output asserted after OVP delay; drives NMOS gate to short fuse to ground and interrupt power path. |
| REG | Regulated supply output | 3.3V output (0–2mA); includes short-circuit current limiting (4mA) and self-disable on UV condition. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP | 4.55V threshold with ±10mV accuracy eliminates need for external trimming or calibration in production. |
| Fixed-delay OV response | 6.5s deterministic delay ensures consistent fuse-blow timing across units and temperature ranges. |
| Self-disabling REG output | Automatically disables 3.3V supply when any cell falls below 2.8V for 6s, preventing deep discharge damage. |
| Ultra-low leakage inputs | <100nA per cell sense pin maintains voltage balance in high-impedance battery strings over years of standby. |
| Small-footprint WSON | 2mm × 2mm 8-pin package enables compact integration into space-constrained battery management modules. |
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 fast-charging cycles. IC Role / Device Role / Timing Role: Second-level hardware OVP monitor that independently verifies each cell voltage and triggers fuse blow via OUT after 6.5s delay. Use Value: Prevents thermal runaway by enforcing strict 4.55V/cell limit with ±10mV accuracy, avoiding reliance on host MCU firmware alone. |
Use Scenario: Embedded in slim-profile ultrabook battery modules where board space and quiescent current are critical constraints. IC Role / Device Role / Timing Role: Provides always-on 3.3V supply to RTC while consuming only 4µA, and self-disables REG when pack voltage drops below 2.8V/cell. Use Value: Enables instant wake-from-sleep functionality without draining battery during weeks of standby, thanks to sub-100nA cell input leakage. |
| Medical Portable Devices | UPS Battery Backup Systems |
Use Scenario: Used in certified medical battery packs requiring redundant, fail-safe overvoltage protection independent of system controller. IC Role / Device Role / Timing Role: Hardware-enforced OVP guardrail with fixed 6.5s delay and CMOS-active-high OUT signal driving external protection FETs. Use Value: Meets IEC 62133 safety requirements via deterministic analog response-no software dependency or clock drift affecting trip timing. |
Use Scenario: Deployed in uninterruptible power supply battery modules to protect against overvoltage during generator-assisted charging or grid surges. IC Role / Device Role / Timing Role: Monitors up to 4 series cells and asserts OUT to isolate battery from charger when any cell exceeds 4.55V for 6.5s. Use Value: Ensures long-term reliability in industrial environments with –40°C to +110°C operating range and robust ESD tolerance (2kV HBM). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ296223DSGT | Same 4.55V OVP, 6.5s delay, 3.3V REG, but UV threshold is 2.5V (vs. 2.8V for BQ296217DSGT) | Lower UV disable point allows REG to remain active longer during gradual discharge, better suited for systems needing extended RTC runtime. | Select BQ296223DSGT if battery cutoff voltage is ≤2.5V/cell and extended regulated supply uptime is required. |
| BQ296231DSGT | Identical 4.55V OVP and 6.5s delay, but UV threshold is 2.5V and REG output is 3.3V (same as BQ296217DSGT) | No functional difference in OVP or REG behavior vs. BQ296217DSGT; differs only in UV setting and orderable marking. | Choose BQ296231DSGT only if sourcing alignment with existing BOMs specifying that variant; no performance advantage over BQ296217DSGT. |
Compared with BQ296217DSGT, BQ296223DSGT offers longer regulated supply availability during discharge due to its 2.5V UV threshold, while BQ296231DSGT matches OVP/REG specs exactly but uses a different UV setting-making BQ296217DSGT the optimal choice for designs requiring 2.8V UV-triggered REG disable to maximize cell longevity.
Availability
BQ296217DSGT is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable device battery modules requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ296217DSGT 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 delivering analog, embedded processing, and connectivity solutions with emphasis on power efficiency, reliability, and system-level integration.
The BQ296xxx family is designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, combining precision cell monitoring, deterministic fault timing, and integrated regulated supply to simplify battery safety architecture.
FAQ
What is the exact overvoltage protection threshold and accuracy of the BQ296217DSGT?
The BQ296217DSGT has a factory-programmed overvoltage protection threshold of 4.55V with ±10mV accuracy at 25°C, and ±54mV accuracy across the full –40°C to +110°C operating range. This tight tolerance ensures reliable cell-level overvoltage cutoff without false triggering in high-precision battery packs, directly supporting compliance with UL 1642 and IEC 62133 safety standards. The BQ296217DSGT achieves this via laser-trimmed internal references and matched comparator design.
How does the BQ296217DSGT regulate its 3.3V output and what is its maximum load capability?
The BQ296217DSGT provides a regulated 3.3V output (VREG) with ±30mV regulation over 0–2mA load and temperature, requiring a minimum 0.47µF ceramic capacitor at the REG pin for stability. Its maximum continuous output current is 2mA, with built-in short-circuit current limiting at 4mA. The BQ296217DSGT also features self-disable: REG turns off when any monitored cell voltage falls below 2.8V for 6 seconds, preventing unnecessary battery drain during deep discharge.
What is the purpose and timing behavior of the fixed delay timer in the BQ296217DSGT?
The BQ296217DSGT incorporates a fixed 6.5-second internal delay timer that begins counting upon detection of any cell exceeding 4.55V. Only after this full interval expires does the active-high OUT pin assert, enabling controlled fuse-blow sequencing. This deterministic delay prevents nuisance trips from transient spikes and ensures sufficient time for host system diagnostics before irreversible protection action. The BQ296217DSGT does not support programmable or adjustable delay values.
How does the BQ296217DSGT handle undervoltage conditions and what is its self-disable behavior?
The BQ296217DSGT monitors for undervoltage on any cell with a factory-set 2.8V threshold (±50mV). If any cell remains below this level for ≥6 seconds, the device automatically disables its 3.3V REG output to prevent further discharge and cell damage. Recovery occurs only when all cells rise above 2.8V + 300mV hysteresis. This self-disable logic is fully autonomous and requires no external control - a core safety feature of the BQ296217DSGT.
What package type and pin configuration does the BQ296217DSGT use, and are there layout-critical considerations?
The BQ296217DSGT uses an 8-pin WSON package (2.00mm × 2.00mm) with exposed thermal pad (PWPD) that must be soldered to VSS on the PCB for thermal and electrical integrity. Critical layout rules include connecting VSS before any other pin during assembly to avoid REG pin damage, placing 0.1µF RC filters close to each Vx pin, and mounting the 0.47µF REG capacitor within 2mm of the REG/VSS pins. These practices ensure signal integrity and reliability in the BQ296217DSGT.
BQ296217DSGT 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)
BQ296217DSGT FAQ
1.How can I place an order for BQ296217DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ296217DSGT 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 BQ296217DSGT reliable?
The price and inventory of BQ296217DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ296217DSGT is usually 5 days.
3.What payment methods are accepted for BQ296217DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ296217DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ296217DSGT?
BQ296217DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ296217DSGT 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 BQ296217DSGT?
For technical support, including BQ296217DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ296217DSGT requirements.
6.How does Aetrix verify that BQ296217DSGT is sourced from the original manufacturer or authorized distributors?
All BQ296217DSGT 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 BQ296217DSGT meets industry standards.
7.What is the process for return or replacement of BQ296217DSGT?
All BQ296217DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ296217DSGT, 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 BQ296217DSGT part is unused and in its original packaging.
Return procedure for BQ296217DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ296217DSGT 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…
