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Texas Instruments BQ7721600PWR
- Part No.:
- BQ7721600PWR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7721600PWR.pdf
- Description:
- VOLTAGE AND TEMPERATURE PROTECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,070
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Product details
Overview
BQ7721600PWR from Texas Instruments is a dedicated 3- to 16-series Li-ion battery protection IC with independent cell voltage monitoring, ±10 mV overvoltage accuracy at 25°C, 1 s fixed OVP/UVP delay, and active-low COUT/DOUT outputs. It delivers precise fault detection for cordless power tools and e-bike battery packs requiring robust, latch-free safety response.
For engineers reviewing the BQ7721600PWR datasheet, BQ7721600PWR pinout, BQ7721600PWR application, or BQ7721600PWR equivalent, this page provides verified technical context, validated pin functions, confirmed protection thresholds (4.325 V OVP / 2.25 V UVP), real-world timing behavior, and two rigorously cross-referenced alternative parts for production design review.
Technical Context
The BQ7721600PWR implements independent per-cell voltage comparison against factory-trimmed OVP (4.325 V) and UVP (2.25 V) thresholds with ±10 mV accuracy at 25°C and ±20 mV across 0°C–60°C. Its internal delay timer initiates on fault detection and expires after exactly 1 s before asserting COUT (OVP/OW/OT/UT) or DOUT (UVP/OW/OT/UT).
It features active-low open-drain COUT and DOUT outputs capable of sinking ≥0.3 mA (no fault) and sourcing ≥3 mA (fault), with internal pullup disabled-requiring external pullup to VDD for logic-level compatibility. Temperature sensing uses an NTC thermistor on TS with internal 20 kΩ pullup and supports overtemperature detection only (70°C threshold, no undertemperature).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.325 V ±10 mV at 25°C - sets precise upper cell voltage limit before COUT activation |
| UVP Threshold | 2.25 V ±30 mV at 25°C - defines minimum cell voltage before DOUT activation |
| OVP/UVP Delay | 1 s fixed - ensures transient spikes are ignored; critical for stable pack operation during load transients |
| Output Type | Active-low open-drain COUT/DOUT - requires external pullup; enables direct interface to FET gate drivers or microcontroller inputs |
| Supply Current | ≈2–3.5 µA (no fault) - enables multi-year standby in battery-powered systems without compromising protection integrity |
| Cell Input Leakage | <100 nA per Vx pin (OW disabled) - minimizes self-discharge impact on high-impedance cell strings |
| Operating Temp | –40°C to 110°C functional range - supports deployment in power tools and e-mobility environments with wide thermal excursions |
Pinout & Package
Package: 24-pin TSSOP (PW), 4.40 mm × 7.80 mm body, 0.65 mm lead pitch, leaded surface-mount format compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | NC | No internal connection; must be left floating or grounded per layout best practice |
| 2 | VDD | Main unregulated supply input (5–75 V); powers internal regulator and sensing circuitry |
| 3–20 | V16–V1 | Independent cell voltage sense inputs (16 total); each monitors positive terminal of one cell in stack |
| 21 | VSS | IC ground reference and negative terminal of lowest cell; forms common return for all Vx inputs |
| 22 | COUT | Active-low open-drain fault output for OVP, OW, OT, UT - sinks current when asserted |
| 23 | DOUT | Active-low open-drain fault output for UVP, OW, OT, UT - sinks current when asserted |
| 24 | TS | NTC thermistor input; ratiometrically monitored with internal 20 kΩ pullup; supports OT detection only |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell voltage monitoring | 16 independent inputs (V1–V16) enable full-stack coverage without external multiplexing or calibration |
| Fixed internal delay timers | Guaranteed 1 s OVP/UVP/OW/OT response eliminates need for external timing components or firmware intervention |
| Open-wire detection | Enabled by default; detects broken interconnects between cells using 50 µA pulsed sink on each Vx input |
| Functional safety-capable architecture | Includes oscillator health check and fault-latching disable (latch = disabled per BQ7721600PWR configuration) |
| Customer Test Mode (CTM) | Reduces fault delay to 50 ms for rapid production-line validation without modifying hardware or firmware |
Applications
| Handheld Power Tools | Cordless Vacuum Cleaners |
|---|---|
Use Scenario: High-current discharge cycles (up to 30 A) with rapid voltage sag and recovery during motor commutation. IC Role / Device Role / Timing Role: Real-time per-cell OVP/UVP enforcement with 1 s delay prevents false trips while ensuring safe cutoff before thermal runaway. Use Value: Enables use of high-energy-density NMC cells without risk of overcharge damage during aggressive charging protocols. |
Use Scenario: Intermittent high-power suction bursts followed by extended low-power standby, demanding ultra-low quiescent current. IC Role / Device Role / Timing Role: Active-low COUT/DOUT directly controls back-to-back FETs in main power path; 2–3.5 µA ICC extends shelf life. Use Value: Eliminates need for secondary MCU-based protection, reducing BOM cost and PCB area in compact vacuum designs. |
| eBike Battery Packs | UPS Battery Backup |
Use Scenario: Wide ambient temperature operation (–20°C to 65°C) with frequent charge/discharge cycling and vibration-induced connector fatigue. IC Role / Device Role / Timing Role: Open-wire detection identifies degraded cell interconnects before catastrophic failure; TS input monitors pack temperature via NTC. Use Value: Prevents field failures due to intermittent connections in mechanically stressed e-bike battery modules. |
Use Scenario: Long-term float charging with infrequent deep discharge events; requires immunity to grid voltage transients and brownouts. IC Role / Device Role / Timing Role: Independent V1–V16 monitoring ensures individual cell balancing readiness and prevents weak-cell overvoltage during recharge. Use Value: Extends usable life of sealed lead-acid or LiFePO₄ backup batteries by enforcing strict per-cell voltage limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7721602PWR | Identical package and pinout; differs in output drive: active-high 6 V COUT/DOUT instead of active-low | Requires external pull-down instead of pull-up; incompatible with existing FET gate driver circuits designed for active-low assertion | Select only if redesigning output interface to support active-high control of external MOSFETs or logic inputs |
| BQ7721607PWR | Same active-low outputs; differs in thresholds: 4.25 V OVP, 2.5 V UVP, 83°C OT, –30°C UT enabled, 4 s delays | Supports wider temperature range and longer delay - better suited for UPS or energy storage where slower response is acceptable | Choose when enhanced cold-weather operation and extended fault hold time are required, not for fast-response power tools |
Compared with BQ7721600PWR, BQ7721602PWR changes output polarity and drive capability, requiring layout and firmware updates, while BQ7721607PWR trades faster 1 s response for broader thermal coverage and undervoltage protection - making it suitable for less dynamic but more environmentally demanding applications.
Availability
BQ7721600PWR is available at Aetrix Electronics and suitable for handheld power tools, cordless vacuum cleaners, and e-bike battery packs requiring stable component supply, long-term lifecycle assurance, and TI-qualified automotive-grade reliability.
Supply support for BQ7721600PWR 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 experience in battery management solutions.
The BQ77216xx product line is engineered specifically for standalone, cost-optimized Li-ion battery pack protection - delivering factory-programmed precision without MCU dependency or external timing components.
FAQ
What is the overvoltage protection threshold and accuracy of the BQ7721600PWR?
The BQ7721600PWR has a factory-programmed overvoltage protection (OVP) threshold of 4.325 V with ±10 mV accuracy at 25°C and ±20 mV accuracy from 0°C to 60°C. This specification is guaranteed across the full operating temperature range and does not require external calibration. The BQ7721600PWR achieves this precision using trimmed internal references and matched comparator circuitry, enabling reliable cell-level protection in high-voltage battery stacks.
Does the BQ7721600PWR support undertemperature protection?
No, the BQ7721600PWR does not support undertemperature (UT) protection. According to the device comparison table and functional description, UT detection is disabled for this specific variant. Only overtemperature (OT) protection at 70°C is enabled. If undertemperature monitoring is required, alternatives such as BQ7721607PWR or BQ7721613PWR must be selected, as they explicitly list UTC (undertemperature threshold) values in their configuration rows.
What are the output drive characteristics of COUT and DOUT on the BQ7721600PWR?
The BQ7721600PWR features active-low open-drain COUT and DOUT outputs. When inactive, both pins float and require external pullup to VDD. When asserted, they sink ≥0.3 mA (no fault) and ≥3 mA (fault condition). The internal pullup is disabled, distinguishing it from active-high variants like BQ7721602PWR. This configuration allows direct interfacing with standard N-channel FET gates or microcontroller interrupt inputs without level-shifting.
Can the BQ7721600PWR be used with 3-series cell configurations?
Yes, the BQ7721600PWR supports battery stacks ranging from 3-series to 16-series Li-ion cells. Its 16 independent voltage sense inputs (V1–V16) allow flexible connection - unused inputs (e.g., V4–V16 for a 3-cell pack) must be tied to VSS or left floating per datasheet guidance. The device automatically adapts monitoring scope without configuration registers or external programming, making it suitable for scalable pack architectures across multiple product lines.
Is Customer Test Mode (CTM) supported on the BQ7721600PWR?
Yes, the BQ7721600PWR fully supports Customer Test Mode (CTM), which reduces fault detection delay from 1 s to 50 ms for rapid production-line validation. CTM is activated by applying VDD ≥ V16 + 12 V (per datasheet spec), and deactivates automatically when the differential falls below 10 V. This feature is inherent to the BQ77216xx family and requires no OTP programming or external signals - simplifying end-of-line testing without firmware involvement.
BQ7721600PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 3 ~ 16
- Fault Protection:
- Over Temperature, Over/Under Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
BQ7721600PWR FAQ
1.How can I place an order for BQ7721600PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7721600PWR 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 BQ7721600PWR reliable?
The price and inventory of BQ7721600PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7721600PWR is usually 5 days.
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Once your BQ7721600PWR 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 BQ7721600PWR?
For technical support, including BQ7721600PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7721600PWR requirements.
6.How does Aetrix verify that BQ7721600PWR is sourced from the original manufacturer or authorized distributors?
All BQ7721600PWR 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 BQ7721600PWR meets industry standards.
7.What is the process for return or replacement of BQ7721600PWR?
All BQ7721600PWR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7721600PWR, 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 BQ7721600PWR part is unused and in its original packaging.
Return procedure for BQ7721600PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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