My Inquiry
My Account
Texas Instruments BQ7721611PWR
- Part No.:
- BQ7721611PWR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7721611PWR.pdf
- Description:
- VOLTAGE AND TEMPERATURE PROTECTI
- Quantity:
- Payment:
- Shipping:
Inventory:386
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ7721611PWR from Texas Instruments is a fixed-threshold, 16-cell Li-ion battery voltage and temperature protection IC with integrated delay timers. It provides independent overvoltage (3.80 V), undervoltage (1.50 V), open-wire, and overtemperature (70°C) detection for 3–16 series cell packs, driving active-high COUT/DOUT outputs to control external FETs or fuses in handheld power tools and e-bike battery management systems.
For engineers reviewing the BQ7721611PWR datasheet, BQ7721611PWR pinout, BQ7721611PWR application, or BQ7721611PWR equivalent, this page delivers verified functional specifications, confirmed TSSOP-24 package mapping, validated fault response timing (4 s OV/UV delay), real-world output drive capability (6 V active-high), and two rigorously cross-referenced alternative parts for Li-ion pack protection design.
Technical Context
The BQ7721611PWR implements independent per-cell voltage monitoring with ±10 mV OVP accuracy at 25°C and ±20 mV across 0°C–60°C, using internal reference and comparator circuitry. Its fixed 4-second delay timer activates upon OVP, UVP, or OW detection before asserting COUT or DOUT.
Temperature protection relies on ratiometric TS-pin sensing with internal 20 kΩ pullup and factory-trimmed thresholds; overtemperature triggers both COUT and DOUT simultaneously. The device operates from 5 V to 75 V supply (VDD = stack top voltage) and supports Customer Test Mode with 50 ms fault detection for production-line validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 3.80 V ±0.020 V (0°C–60°C); sets cell overcharge cutoff point with 0.200 V hysteresis |
| UVP Threshold | 1.50 V ±0.050 V (–40°C–110°C); defines minimum safe cell discharge voltage |
| OT Threshold | 70°C ±5°C; triggers dual-output fault when NTC resistance drops below ~2195 Ω |
| Delay Timer | 4 s for OVP/UVP/OW/OT; prevents false trips during transient conditions |
| Supply Current | ≈2–3.5 µA (no fault); enables ultra-low-power always-on monitoring in battery standby |
| Output Drive | COUT/DOUT active-high to 6 V; drives external FET gate directly without level-shifting |
| Cell Range | Supports 3–16 series Li-ion cells; V1–V16 inputs monitor individual cell voltages |
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 power input tied to top of battery stack; supplies internal regulator and logic |
| 3–20 | V16–V1 | Independent cell voltage sense inputs; V1 connects to lowest cell anode, V16 to highest cell cathode |
| 21 | VSS | IC ground and reference for all cell inputs; electrically connected to bottom cell negative terminal |
| 22 | COUT | Active-high fault output for overvoltage, open-wire, and overtemperature events |
| 23 | DOUT | Active-high fault output for undervoltage, open-wire, and overtemperature events |
| 24 | TS | NTC thermistor interface; ratiometric measurement with internal 20 kΩ pullup resistor |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4 s delay timers | Eliminates need for external RC timing components; ensures consistent fault response across temperature |
| Active-high 6 V COUT/DOUT | Directly drives high-side FET gates without external level shifters or pullups |
| Open-wire detection disabled | Reduces system complexity and leakage current (<100 nA per cell input) in cost-sensitive designs |
| Functional safety-capable | Includes oscillator health check and fault-latching capability for ISO 26262-compliant BMS architectures |
| Customer Test Mode (CTM) | Enables 50 ms fault validation during production test-reducing line time vs full 4 s delay verification |
Applications
| Handheld Power Tools | eBike Battery Packs |
|---|---|
Use Scenario: Cordless drill/driver battery packs requiring robust overvoltage and undervoltage cutoff during high-current charge/discharge cycles. IC Role / Device Role / Timing Role: Primary voltage protector monitoring each cell independently; asserts COUT at 3.80 V to disable charging FETs within 4 s. Use Value: Prevents Li-ion cell swelling or thermal runaway by enforcing precise 3.80 V OVP threshold with ±20 mV accuracy across operating temperature. |
Use Scenario: 13S–16S e-bike battery modules needing reliable overtemperature shutdown when motor regen heats cells above 70°C. IC Role / Device Role / Timing Role: Dual-output OT detector using TS pin and internal 20 kΩ pullup; triggers both COUT and DOUT simultaneously after 4 s delay. Use Value: Ensures fail-safe thermal shutdown without software intervention, leveraging factory-trimmed 70°C ±5°C accuracy and ratiometric NTC interface. |
| Cordless Vacuum Cleaners | UPS Battery Backup |
Use Scenario: High-drain cordless vacuum battery packs subject to rapid voltage sag and recovery during brush motor load transients. IC Role / Device Role / Timing Role: Undervoltage protector with 1.50 V threshold and 4 s delay; holds DOUT active only after sustained low-voltage condition. Use Value: Avoids nuisance shutdowns during momentary voltage dips while guaranteeing deep-discharge protection at true 1.50 V per cell. |
Use Scenario: Rack-mounted UPS systems requiring long-term cell voltage stability monitoring with minimal self-consumption. IC Role / Device Role / Timing Role: Ultra-low-power protector drawing ≤3.5 µA in normal operation; maintains continuous monitoring during extended standby. Use Value: Extends backup runtime by minimizing quiescent current drain-critical for months-long grid-out scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion battery voltage and temperature protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7721607PWR | 83°C OT threshold, –30°C UT enable, 0.100 V OV hysteresis, active-high COUT + active-low DOUT | Required for sub-zero temperature operation and higher OT trip points in industrial UPS | Select when undertemperature protection and dual-output polarity are needed |
| BQ7721614PWR | 3.90 V OVP, 1.85 V UVP, 0.100 V OV hysteresis, 4 s delays, active-high COUT/DOUT | Balances higher OVP margin and moderate UVP for mid-range e-scooter packs | Choose for applications needing tighter 0.100 V hysteresis and 1.85 V UVP without UT support |
Compared with BQ7721611PWR, BQ7721607PWR adds undertemperature protection and higher OT trip but uses mixed-output polarity, while BQ7721614PWR offers finer hysteresis control and a higher UVP threshold-both require PCB-level validation due to differing fault response behavior and pin-compatible packaging.
Availability
BQ7721611PWR is available at Aetrix Electronics and suitable for handheld power tools, e-bike battery packs, and cordless vacuum cleaner designs requiring stable component supply, long-term lifecycle support, and automotive-grade reliability under –40°C to 110°C ambient conditions.
Supply support for BQ7721611PWR 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 reliability, precision, and power efficiency for industrial, automotive, and consumer applications.
The BQ77216xx product line is designed specifically for standalone, cost-optimized Li-ion battery pack protection-eliminating MCU dependency while providing factory-programmed voltage, temperature, and timing thresholds for rapid BMS deployment.
FAQ
What is the overvoltage protection threshold of the BQ7721611PWR?
The BQ7721611PWR has a fixed overvoltage protection (OVP) threshold of 3.80 V per cell, with ±20 mV accuracy from 0°C to 60°C and 0.200 V hysteresis. This value is factory-programmed and non-adjustable. The BQ7721611PWR uses internal reference circuitry to maintain tight tolerance without external components, making it suitable for applications where precise, repeatable cell overcharge cutoff is required-such as in professional-grade power tool battery packs.
Does the BQ7721611PWR support undertemperature protection?
No, the BQ7721611PWR does not support undertemperature (UT) protection. According to the Device Comparison Table, UT is explicitly listed as "Disabled" for this part number. The BQ7721611PWR provides overtemperature (70°C), overvoltage, undervoltage, and open-wire detection-but UT functionality is omitted to simplify design and reduce cost in applications where low-temperature operation is not a safety requirement, such as indoor power tools or short-duration e-bike use.
What output drive configuration does the BQ7721611PWR use for COUT and DOUT?
The BQ7721611PWR uses active-high output drive for both COUT and DOUT pins, capable of sourcing up to 4.5 mA and driving to 6 V. This configuration allows direct interfacing with high-side N-channel FET gates without external level shifters. The BQ7721611PWR's output stage is factory-configured and cannot be changed in-circuit; its 6 V drive capability ensures reliable FET turn-on even when VDD exceeds typical logic levels, supporting wide-input battery stacks up to 75 V.
How does open-wire detection work on the BQ7721611PWR?
The BQ7721611PWR has open-wire (OW) detection disabled per its device configuration-confirmed in Table 4-2. When disabled, the internal 50 µA pull-down current on each Vx pin is inactive, reducing input leakage to <100 nA per cell and eliminating false OW faults during cell attachment or noisy environments. The BQ7721611PWR retains full voltage and temperature monitoring capability without OW, simplifying layout and improving measurement stability in cost-sensitive applications like consumer vacuum cleaners.
What is the purpose of Customer Test Mode (CTM) in the BQ7721611PWR?
Customer Test Mode (CTM) in the BQ7721611PWR reduces fault delay time from the nominal 4 s to approximately 50 ms, enabling rapid production-line validation of protection functionality without waiting for full delay periods. Entry requires VDD to exceed V16 by ≥12 V; CTM is automatically exited when that differential falls below 10 V. The BQ7721611PWR's CTM preserves all fault detection logic-including OVP, UVP, and OT-making it ideal for end-of-line functional testing of assembled battery packs prior to shipment.
BQ7721611PWR 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 ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
BQ7721611PWR FAQ
1.How can I place an order for BQ7721611PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7721611PWR 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 BQ7721611PWR reliable?
The price and inventory of BQ7721611PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7721611PWR is usually 5 days.
3.What payment methods are accepted for BQ7721611PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7721611PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7721611PWR?
BQ7721611PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7721611PWR 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 BQ7721611PWR?
For technical support, including BQ7721611PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7721611PWR requirements.
6.How does Aetrix verify that BQ7721611PWR is sourced from the original manufacturer or authorized distributors?
All BQ7721611PWR 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 BQ7721611PWR meets industry standards.
7.What is the process for return or replacement of BQ7721611PWR?
All BQ7721611PWR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7721611PWR, 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 BQ7721611PWR part is unused and in its original packaging.
Return procedure for BQ7721611PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ7721611PWR 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…
