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Texas Instruments BQ7720501DGKR
- Part No.:
- BQ7720501DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
BQ7720501DGKR.pdf
- Description:
- Ultra-low-power voltage protecto
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
BQ7720501DGKR from Texas Instruments is a dedicated overvoltage protection IC for 3- to 5-series Li-ion battery packs, featuring ±10 mV overvoltage detection accuracy at 25°C, fixed 4.275 V OVP threshold, 2-second internal delay timer, and active-low open-drain output drive. It operates across –40°C to 110°C and supports handheld power tools requiring precise cell-level fault response.
For engineers reviewing the BQ7720501DGKR datasheet, BQ7720501DGKR pinout, BQ7720501DGKR application, or BQ7720501DGKR equivalent, key selection criteria include OVP threshold (4.275 V), delay time (2 s), open-wire detection capability, thermal performance (RθJA = 180°C/W), and VSSOP-8 package compatibility with high-density battery management layouts.
Technical Context
The BQ7720501DGKR implements independent per-cell voltage monitoring using precision analog comparators with fixed internal reference and hysteresis (50 mV). Its internal oscillator drives a deterministic delay timer that triggers the OUT pin only after sustained overvoltage exceeds the 4.275 V threshold for the full 2-second duration.
Open-wire detection operates via periodic 50-μA pulldown current on each Vx input, enabling fault identification without external circuitry. The device enters Customer Test Mode (CTM) when VDD exceeds V5 by ≥12 V, reducing fault delay to 50 ms for production-line validation-without altering functional behavior or thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.275 V - fixed factory-programmed trip point for all five cell inputs, enabling consistent pack-level overvoltage cutoff |
| OVP Accuracy | ±10 mV at 25°C - ensures reliable detection within ±0.24% of nominal Li-ion cell voltage, minimizing false trips |
| Delay Timer | 2 s - fixed internal timing before OUT activation, providing noise immunity against transient voltage spikes |
| Supply Current | ≈2.5 µA (typical) - ultra-low ICC enables multi-year operation in always-on battery protection circuits |
| Input Leakage | <100 nA per cell input (OW disabled) - preserves cell balance and minimizes self-discharge in idle packs |
| Operating Temp | –40°C to 110°C - supports industrial-grade battery applications including eBikes and cordless power tools |
| Package | VSSOP-8 (DGK) - 5.0 mm × 3.0 mm footprint with 0.65-mm pitch, optimized for compact PCB layout near cell connections |
Pinout & Package
VSSOP-8 (DGK) package: 5.0 mm × 3.0 mm body, 0.65-mm lead pitch, exposed pad optional, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 YEAR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated input tied to top-of-stack voltage (up to 27.5 V); requires RC filter (RVD/CVD) for noise immunity |
| V5 | Cell voltage sense input | Sense node for positive terminal of fifth cell (topmost in 5S stack); accepts up to 30 V relative to VSS |
| V4 | Cell voltage sense input | Sense node for fourth cell; identical electrical specs to V5, supports random cell connection sequence |
| V3 | Cell voltage sense input | Sense node for third cell; monitored independently for overvoltage and open-wire faults |
| V2 | Cell voltage sense input | Sense node for second cell; pulldown-based open-wire detection activates every 128 ms |
| V1 | Cell voltage sense input | Sense node for first cell (bottom of stack); referenced to VSS, not ground |
| VSS | Reference ground | IC ground and negative terminal of lowest cell; must be routed directly to CELL– to avoid sensing error |
| OUT | Fault signal output | Active-low open-drain output; sinks current during fault; requires external pull-up to enable system-level shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.275 V OVP threshold | Eliminates external resistor network calibration and reduces BOM count in production battery packs |
| 2-second internal delay timer | Prevents nuisance tripping from short-duration transients while maintaining fast response to genuine overvoltage events |
| Open-wire detection with 50-μA pulldown | Identifies broken cell interconnects without auxiliary components, supporting field-repairable pack designs |
| Customer Test Mode (CTM) | Reduces production-line fault verification time from seconds to 50 ms via controlled VDD–V5 differential |
| Functional safety-capable architecture | Includes oscillator health check and deterministic timing paths suitable for ISO 26262 ASIL-B–aligned systems |
Applications
| Handheld Power Tools | Cordless Vacuum Cleaners |
|---|---|
|
Use Scenario: High-current discharge cycles during motor startup and stall conditions cause momentary cell voltage spikes. IC Role / Device Role / Timing Role: BQ7720501DGKR monitors each cell independently and asserts OUT only after sustained >4.275 V for 2 s, preventing false shutdowns. Use Value: Enables robust tool runtime without compromising safety margin, validated across 0°C–60°C operating range. |
Use Scenario: Frequent charge/discharge cycles accelerate cell imbalance, increasing risk of individual cell overvoltage. IC Role / Device Role / Timing Role: BQ7720501DGKR detects overvoltage on any single cell and triggers system disable via open-drain OUT. Use Value: Extends pack service life by isolating faulty cells early, supported by ±10 mV accuracy at 25°C. |
| eBike Battery Packs | UPS Backup Systems |
|
Use Scenario: Regenerative braking induces reverse current and voltage overshoot on upper cells in 5S configurations. IC Role / Device Role / Timing Role: BQ7720501DGKR's V5–VSS sensing path handles up to 30 V differential and initiates 2-s delay before fault assertion. Use Value: Maintains ride continuity during transient events while guaranteeing hard cutoff before cell damage occurs. |
Use Scenario: Long-term float charging causes gradual voltage drift; aging cells exhibit increased leakage and reduced tolerance. IC Role / Device Role / Timing Role: BQ7720501DGKR's <100 nA input leakage (OW disabled) prevents measurement drift and false OVP triggers. Use Value: Ensures UPS remains operational for years without maintenance-induced protection errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7720500DGKR | 4.200 V OVP threshold, 1-second delay timer | Targeted at lower-voltage Li-ion chemistries (e.g., LFP-tolerant designs) or tighter timing requirements | Select when pack nominal voltage or cell chemistry demands lower trip point and faster response than BQ7720501DGKR |
| BD750L5GUL | Single-cell OVP IC (max 5.5 V), no open-wire detection, 1.5 µA ICC | Limited to 1S configurations; lacks multi-cell independence and fault diagnostics of BQ7720501DGKR | Use only for simple 1S backup power rails where multi-cell monitoring is unnecessary |
Compared with BQ7720501DGKR, BQ7720500DGKR offers a lower OVP threshold and shorter delay for more aggressive protection, while BD750L5GUL provides ultra-low-power single-cell monitoring but cannot replace BQ7720501DGKR in 3S–5S battery systems requiring per-cell fault isolation.
Availability
BQ7720501DGKR is available at Aetrix Electronics and suitable for handheld power tools, cordless vacuum cleaners, and light electric vehicles requiring stable component supply with long-lifecycle support and automotive-grade temperature resilience.
Supply support for BQ7720501DGKR 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 company specializing in analog and embedded processing technologies, with leadership in battery management, power conversion, and signal chain solutions.
The BQ77205 family is designed specifically for cost-sensitive, high-volume Li-ion battery pack protection-delivering fixed-function safety features without MCU dependency or firmware overhead.
FAQ
What is the exact overvoltage protection threshold programmed into the BQ7720501DGKR?
The BQ7720501DGKR has a factory-programmed overvoltage protection threshold of 4.275 V, with ±10 mV accuracy at 25°C and ±20 mV accuracy across 0°C to 60°C. This value is fixed and non-adjustable, eliminating external resistor networks and ensuring consistent trip behavior across production units of the BQ7720501DGKR.
Does the BQ7720501DGKR support open-wire detection, and how does it function?
Yes, the BQ7720501DGKR supports open-wire detection on all five cell inputs (V1–V5). It applies a 50-μA pulldown current to each input every 128 ms and monitors for voltage drop below Vn−1 − 200 mV. If detected, a 4-second delay timer activates before asserting the OUT pin-enabling reliable broken-connection identification without additional components in the BQ7720501DGKR design.
What is the purpose and activation method of Customer Test Mode (CTM) in the BQ7720501DGKR?
Customer Test Mode (CTM) in the BQ7720501DGKR reduces fault delay time from 2 seconds to 50 ms for rapid production-line validation. It is activated by raising VDD to at least 12 V above V5 (e.g., VDD ≥ V5 + 12 V), verified per the BQ7720501DGKR datasheet. CTM maintains identical OVP and OW thresholds-only timing is compressed, preserving functional integrity during test.
How is the output drive configured on the BQ7720501DGKR, and what are its electrical limits?
The BQ7720501DGKR features an active-low open-drain OUT pin, capable of sinking up to 3 mA (typical) when asserted. It requires an external pull-up resistor to VDD or another logic rail. During normal operation, leakage is ≤100 nA. The BQ7720501DGKR does not support active-high drive-this configuration is reserved for other variants like BQ7720501DGKT with OTP programming.
What thermal performance metrics apply to the BQ7720501DGKR in its VSSOP-8 (DGK) package?
The BQ7720501DGKR in DGK package has a junction-to-ambient thermal resistance (RθJA) of 180°C/W, junction-to-board (RθJB) of 130°C/W, and junction-to-case (top) (RθJC(top)) of 55°C/W. These values assume standard JEDEC 2-layer board conditions and guide heatsinking decisions-especially critical in sealed battery enclosures where ambient temperature can exceed 85°C during operation of the BQ7720501DGKR.
BQ7720501DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- BQ77205
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 3 ~ 5
- Fault Protection:
- Over Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
BQ7720501DGKR FAQ
1.How can I place an order for BQ7720501DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7720501DGKR 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 BQ7720501DGKR reliable?
The price and inventory of BQ7720501DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7720501DGKR is usually 5 days.
3.What payment methods are accepted for BQ7720501DGKR?
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4.How is shipping managed for BQ7720501DGKR?
BQ7720501DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7720501DGKR 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 BQ7720501DGKR?
For technical support, including BQ7720501DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7720501DGKR requirements.
6.How does Aetrix verify that BQ7720501DGKR is sourced from the original manufacturer or authorized distributors?
All BQ7720501DGKR 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 BQ7720501DGKR meets industry standards.
7.What is the process for return or replacement of BQ7720501DGKR?
All BQ7720501DGKR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7720501DGKR, 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 BQ7720501DGKR part is unused and in its original packaging.
Return procedure for BQ7720501DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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