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Texas Instruments BQ294713DSGT
- Part No.:
- BQ294713DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ294713DSGT.pdf
- Description:
- IC BATTERY MANAGEMENT
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
BQ294713DSGT from Texas Instruments is a factory-programmed overvoltage protection IC for 2- to 4-series Li-ion battery packs, featuring ±10 mV OVP accuracy, 4.60 V fixed overvoltage threshold, external capacitor-programmed delay timer (1–2 s with 0.1 µF), and CMOS active-high output drive. It operates across –40°C to +85°C and consumes ≈1 µA in normal mode, enabling reliable secondary protection in portable power systems.
For engineers reviewing the BQ294713DSGT datasheet, BQ294713DSGT pinout, BQ294713DSGT application, or BQ294713DSGT equivalent, this page delivers verified specifications, validated pin functions, real-world implementation context for battery pack safety design, and confirmed alternative options for OVP protection in multi-cell Li-ion systems.
Technical Context
The BQ294713DSGT independently monitors up to four cell voltages (V1–VSS through V4–V3) using precision analog comparators with factory-trimmed 4.60 V OVP threshold and 300 mV hysteresis. Its delay timer circuit charges and discharges an external capacitor on the CD pin to enforce a user-configurable fault response window.
Upon detecting any cell voltage exceeding 4.60 V, the device initiates the CD-based timing sequence; if the capacitor fails to charge or discharge properly (e.g., open/shorted), the OUT pin activates immediately-ensuring fail-safe behavior without relying on external supervision logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.60 V ±10 mV at TA = 25°C - enables precise cell-level cutoff before electrolyte decomposition in high-voltage Li-ion chemistries. |
| OVP Hysteresis | 300 mV - prevents chatter during voltage recovery near threshold, ensuring stable reset after fault clearance. |
| Delay Timer Range | 1–2 s with 0.1 µF CD capacitor - provides configurable response latency to distinguish transient spikes from sustained overvoltage events. |
| Supply Current | ≈1 µA when all cells < VPROTECT - minimizes parasitic drain on battery packs during long-term storage. |
| Input Leakage | <100 nA per cell input - preserves cell voltage balance and avoids measurement error in high-impedance sensing networks. |
| Operating Temp | –40°C to +85°C - supports industrial-grade battery operation in notebooks, UPS, and portable medical equipment. |
| Output Type | CMOS Active High - drives NMOS fuse-control FET directly without pull-up resistor, simplifying PCB layout. |
Pinout & Package
Package: 8-pin WSON (DSG), 2.00 mm × 2.00 mm, exposed thermal pad (PowerPAD™) 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 must be filtered with RC network for noise immunity. |
| V4 | Cell voltage sense input | Senses positive terminal of topmost (4th) cell in stack; requires 1 kΩ series R and 0.1 µF shunt C for stability. |
| V3 | Cell voltage sense input | Senses positive terminal of 3rd cell; unused pins in 2S/3S configurations must be shorted to adjacent lower pin. |
| V2 | Cell voltage sense input | Senses positive terminal of 2nd cell; shares same RC filter requirements as V3 and V4. |
| V1 | Cell voltage sense input | Senses positive terminal of lowest cell; referenced to VSS and forms bottom of differential sensing chain. |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; connects to PowerPAD™ for thermal and electrical integrity. |
| CD | External delay capacitor node | Connects to timing capacitor; includes open/short fault detection that forces immediate OUT activation if compromised. |
| OUT | Overvoltage fault signal output | CMOS Active High - drives high (VDD – 0.3 V min) during fault to enable NMOS fuse switch; sinks ≤400 mV when inactive. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed OVP threshold | Fixed 4.60 V with ±10 mV accuracy - eliminates external trimming components and ensures consistent protection across production batches. |
| External capacitor-programmed delay | 1–2 s range via 0.1 µF CD capacitor - allows system-level tuning of fault response time without firmware or logic changes. |
| CD pin fault detection | Detects open or shorted delay capacitor - guarantees fail-safe activation even if external timing component fails, meeting IEC 62133 safety requirements. |
| Ultra-low quiescent current | ≈1 µA supply current - extends shelf life of battery packs by minimizing self-discharge during storage or standby. |
| Independent cell monitoring | Four dedicated analog inputs (V1–VSS to V4–V3) - enables true per-cell overvoltage detection in 2S–4S configurations without shared sensing errors. |
Applications
| Notebook Battery Packs | UPS Backup Systems |
|---|---|
Use Scenario: Protecting 3S or 4S Li-ion modules against charger overvoltage or cell imbalance during fast charging cycles. IC Role / Device Role / Timing Role: Secondary overvoltage protector that triggers after primary charger IC fails, asserting fault signal to blow fuse within 2 seconds. Use Value: Prevents thermal runaway by cutting power before individual cells exceed 4.60 V, leveraging ±10 mV accuracy to avoid premature shutdown. |
Use Scenario: Safeguarding 4S Li-ion backup banks in enterprise UPS units subjected to grid surges and extended float charging. IC Role / Device Role / Timing Role: Standalone hardware-based OVP monitor independent of MCU control, with CD-based delay preventing nuisance trips during brief AC transients. Use Value: Ensures fail-operational safety with open/short detection on CD pin - maintains protection even if timing capacitor degrades over 10+ year field life. |
| Portable Medical Devices | Industrial Handheld Scanners |
Use Scenario: Securing dual 2S Li-ion packs powering portable ultrasound or infusion pumps where battery failure risks patient safety. IC Role / Device Role / Timing Role: Redundant hardware OVP layer that asserts active-high OUT to disable power path FETs when any cell reaches 4.60 V. Use Value: Meets IEC 60601-1 creepage/clearance and leakage current limits (<100 nA per input) while operating across –40°C to +85°C ambient. |
Use Scenario: Enabling ruggedized barcode scanners with hot-swappable 3S battery packs used in warehouse logistics environments. IC Role / Device Role / Timing Role: Low-power (1 µA) protector that remains always-on during battery insertion, detecting overvoltage before system boot. Use Value: Eliminates need for MCU wake-up and ADC sampling - reduces BOM cost and improves response time versus software-based monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ294704DSGT | OVP threshold = 4.40 V (vs. 4.60 V); identical pinout, timing, and leakage specs | Suitable for NMC or LCO cells requiring earlier cutoff to extend cycle life at lower voltage ceiling | Select when system-level validation confirms 4.40 V provides sufficient margin before gas generation onset. |
| BQ294706DSGT | OVP threshold = 4.55 V; same 300 mV hysteresis and 1 µA ICC, but not rated for 110°C operation | Valid for commercial-temp notebooks and consumer UPS where 85°C max ambient suffices | Choose for cost-sensitive designs needing tighter 4.55 V threshold while retaining full functional compatibility. |
Compared with BQ294713DSGT, BQ294704DSGT offers earlier overvoltage intervention for conservative cell management, while BQ294706DSGT provides intermediate threshold granularity with identical interface behavior-both require no PCB changes but differ in protection voltage setpoint and temperature rating scope.
Availability
BQ294713DSGT is available at Aetrix Electronics and suitable for notebook battery packs, UPS backup systems, and portable medical devices requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing for safety-critical applications.
Supply support for BQ294713DSGT 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 and industrial-grade reliability.
The BQ2947 family is designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, delivering hardware-enforced safety without MCU dependency-targeting applications where functional safety and long-term field stability are mandatory.
FAQ
What is the exact overvoltage protection threshold of the BQ294713DSGT?
The BQ294713DSGT has a factory-programmed overvoltage protection threshold of 4.60 V with ±10 mV accuracy at 25°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The BQ294713DSGT maintains this threshold across its full operating temperature range of –40°C to +85°C, with drift bounded by ±54 mV at 110°C per datasheet Section 6.5.
Does the BQ294713DSGT support 2-cell and 3-cell battery configurations?
Yes, the BQ294713DSGT supports 2-series, 3-series, and 4-series Li-ion configurations. For 2S operation, V3 and V4 pins are shorted to V2; for 3S, V4 is shorted to V3. All configurations retain independent per-cell monitoring capability, and the device automatically adapts sensing range without configuration pins or firmware.
How does the CD pin fault detection work on the BQ294713DSGT?
The BQ294713DSGT continuously monitors the CD pin for valid charge/discharge behavior. If the external capacitor is open-circuited (no voltage rise) or shorted to VSS (no discharge transition), the timeout detection circuit forces immediate activation of the OUT pin-bypassing the normal delay timer. This ensures fail-safe response even with compromised external components.
What is the recommended external capacitor value for the CD pin on the BQ294713DSGT?
The recommended CD capacitor value for the BQ294713DSGT is 0.1 µF, yielding a nominal delay time of 1–2 seconds. The datasheet specifies tCD = K × CCD, where K ranges from 10 to 20 s/F. Using a 0.1 µF capacitor with ±10% tolerance results in a guaranteed delay window of 0.9–2.2 s, accommodating production variance while maintaining safety margins.
Can the BQ294713DSGT be used in automotive applications?
The BQ294713DSGT is rated for –40°C to +85°C operation and carries industrial qualification, but it is not AEC-Q200 qualified or specified for automotive under-hood environments. For automotive battery packs, TI recommends the BQ77PL900 family instead. The BQ294713DSGT remains suitable for automotive infotainment or accessory battery systems operating within its ambient temperature and reliability envelope.
BQ294713DSGT 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ294713DSGT FAQ
1.How can I place an order for BQ294713DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ294713DSGT 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 BQ294713DSGT reliable?
The price and inventory of BQ294713DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ294713DSGT is usually 5 days.
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Once your BQ294713DSGT 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 BQ294713DSGT?
For technical support, including BQ294713DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ294713DSGT requirements.
6.How does Aetrix verify that BQ294713DSGT is sourced from the original manufacturer or authorized distributors?
All BQ294713DSGT 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 BQ294713DSGT meets industry standards.
7.What is the process for return or replacement of BQ294713DSGT?
All BQ294713DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ294713DSGT, 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 BQ294713DSGT part is unused and in its original packaging.
Return procedure for BQ294713DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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