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Texas Instruments BQ20Z70PWR-V160
- Part No.:
- BQ20Z70PWR-V160
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ20Z70PWR-V160.pdf
- Description:
- IC GAS GAUGE FOR BQ29330 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,094
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Product details
Overview
BQ20Z70PWR-V160 from Texas Instruments is a Smart Battery System (SBS) v1.1–compliant gas gauge IC with Impedance Track™ technology, designed for Li-ion/Li-polymer battery packs requiring precise fuel gauging, safety monitoring, and SMBus communication. It integrates an 8-bit RISC CPU, dual 16-bit delta-sigma ADCs, on-chip clock, and FLASH memory, and operates with the bq29330 analog front-end to deliver full pack electronics functionality in notebook PCs and portable medical instrumentation.
For engineers reviewing the BQ20Z70PWR-V160 datasheet, BQ20Z70PWR-V160 pinout, BQ20Z70PWR-V160 application, or BQ20Z70PWR-V160 equivalent, key selection considerations include its ±0.65 nVh coulomb counter resolution, <1% lifetime gas-gauge error, SHA-1 authentication support, 20-pin TSSOP package, and tight integration requirements with the bq29330 AFE for cell voltage, current, and temperature measurement.
Technical Context
The BQ20Z70PWR-V160 implements a dedicated Impedance Track™ algorithm that continuously models battery impedance versus state-of-charge, temperature, and aging-enabling accurate remaining capacity estimation without learning cycles. Its dual delta-sigma ADC architecture supports simultaneous high-resolution measurement of differential cell voltage (via bq29330 interface), thermistor-based temperature (TS1/TS2), and bidirectional current (SRP/SRN) across 5–20 mΩ sense resistors.
It operates in three power modes-Normal (1-second update interval), Sleep (configurable interval with wake-on-current/fault), and Shutdown-with typical operating current of 400 µA (BQ20Z70 only) and 475 µA when paired with bq29330. Communication occurs over SMBus v1.1 with PEC support, and all safety decisions-including primary overvoltage/overcurrent and secondary fuse-triggering via SAFE pin-are executed autonomously by the device's embedded firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas Gauging Accuracy | Better than 1% error over battery lifetime; no full-charge/discharge learning required |
| Coulomb Counter Resolution | Better than 0.65 nVh; enables sub-mAh charge/discharge tracking precision |
| ADC Architecture | Two 16-bit delta-sigma converters: one for voltage/temperature, one for current sensing |
| SMBus Compliance | Fully SBS v1.1 compliant with broadcast charging commands and PEC error checking |
| Operating Temperature | –40°C to +85°C; validated for industrial and portable computing environments |
| Supply Voltage Range | 2.4 V to 2.6 V; tightly regulated input required for stable ADC and CPU operation |
| Authentication | SHA-1 cryptographic authentication support for secure host-battery handshake |
Pinout & Package
Package: 20-pin TSSOP (PW), 6.4 mm × 4.4 mm × 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 XALERT | Interrupt input | Accepts alert signal from bq29330 to trigger immediate status read or fault response |
| 2 TS2 / 3 TS1 | Analog thermistor inputs | Monitor two independent NTC thermistors (e.g., Semitec 103AT) for pack/environment temperature |
| 4 CLKOUT | 32.768 kHz output | Drives bq29330 watchdog timer (WDI); eliminates need for external crystal |
| 5 PRES | System presence detection | Monitors PU pin pull-down to detect host system insertion into battery slot |
| 6 PFIN | Secondary protector status | Inputs active-low signal from external protection IC to enable layered safety logic |
| 7 SAFE | Active-high safety output | Triggers permanent disable (e.g., fuse blow) upon critical fault-second-level safety enforcement |
| 8 SMBD / 10 SMBC | SMBus bidirectional lines | Open-drain data/clock interface per SBS v1.1; supports up to 100 kHz operation |
| 11 SDATA / 12 SCLK | bq29330 digital interface | Direct connection to AFE for cell voltage, balancing control, and protection status exchange |
| 14 SRP / 15 SRN | Current sense differential inputs | Measure voltage drop across 5–20 mΩ shunt resistor for high-accuracy coulomb counting |
| 16 MRST | Master reset input | Synchronizes reset with bq29330 XRST; ensures coordinated initialization of both ICs |
| 19 VCELL+ / 20 VCELL− | Differential cell voltage input | Connects directly to bq29330 CELL+ and CELL− pins for calibrated cell voltage acquisition |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Algorithm | Real-time battery impedance modeling enables <1% gas-gauge accuracy across aging, temperature, and load profiles |
| Integrated Dual ADC System | Separate 16-bit delta-sigma converters for voltage/temperature and current eliminate cross-channel interference |
| Configurable Power Modes | Normal (1 s updates), Sleep (adjustable interval + wake-on-event), and Shutdown (0.1 µA) optimize runtime for portable systems |
| On-Chip FLASH Memory | Field-programmable nonvolatile memory stores calibration data, chemistry parameters, and custom configuration-no external EEPROM needed |
| Smart Charger Control | Reports real-time charging current/voltage targets via SMBus broadcasts, enabling adaptive constant-current/constant-voltage charging |
| Multi-Level Safety Architecture | Primary (cell OV/UV, OC, OT) and secondary (SAFE-triggered fuse blow) protections operate independently for fail-safe operation |
Applications
| Notebook PC Battery Packs | Medical Portable Diagnostic Devices |
|---|---|
Use Scenario: Integrated into removable smart battery packs for ultrabooks and 2-in-1 laptops requiring precise runtime prediction and OEM authentication. IC Role / Device Role / Timing Role: Primary SBS-compliant gas gauge and safety manager; communicates battery status and charging directives over SMBus to host EC/BIOS. Use Value: Enables Windows ACPI battery reporting, prevents premature shutdown via accurate SoC estimation, and enforces OEM security via SHA-1 authentication. |
Use Scenario: Embedded in sealed, rechargeable battery modules for handheld ultrasound, ECG monitors, and point-of-care analyzers. IC Role / Device Role / Timing Role: Autonomous fuel gauge and thermal safety supervisor; performs continuous cell impedance analysis during clinical use and standby. Use Value: Guarantees >99% runtime accuracy across 500+ charge cycles and validates battery authenticity before powering life-critical functions. |
| Industrial Handheld Test Equipment | Portable Laboratory Instrumentation |
Use Scenario: Used in ruggedized multimeters, oscilloscopes, and spectrum analyzers with hot-swappable Li-ion packs. IC Role / Device Role / Timing Role: Real-time coulomb counter and dual-thermistor monitor; triggers safe shutdown at 65°C and logs cycle count for maintenance scheduling. Use Value: Extends field service life by preventing thermal runaway and enabling predictive battery replacement based on State of Health (SoH) metrics. |
Use Scenario: Deployed in portable gas chromatographs, pH meters, and spectrophotometers requiring stable power and regulatory traceability. IC Role / Device Role / Timing Role: SBS v1.1–certified battery management unit; stores manufacturer date, serial number, and calibration history in on-chip FLASH. Use Value: Meets IEC 62304 software lifecycle requirements by providing auditable battery health records and immutable firmware configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gas-gauging and smart-battery applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ20Z75PWR | Same Impedance Track™ core but adds integrated 32.768 kHz oscillator and enhanced FLASH endurance (100k cycles vs. 20k) | Supports standalone operation without external clock; better suited for new designs targeting long-term field calibration retention | Select BQ20Z75PWR if eliminating the CLKOUT→bq29330 WDI path and extending FLASH write-cycle life are design priorities |
| BQ20Z95PWR | Successor with extended temperature range (–40°C to +105°C), improved ADC linearity (±0.007% INL), and SBS v1.2 compliance | Required for automotive-adjacent portable equipment operating near heat sources or in wide ambient ranges | Choose BQ20Z95PWR for next-gen designs needing higher thermal robustness and future-proof SBS protocol support |
Compared with BQ20Z70PWR-V160, the BQ20Z75PWR simplifies clock tree integration and improves FLASH longevity, while the BQ20Z95PWR extends operational envelope and protocol capability-neither is pin-compatible, and both require updated firmware and layout due to revised thermal and timing constraints.
Availability
BQ20Z70PWR-V160 is available at Aetrix Electronics and suitable for notebook PC battery packs, portable medical diagnostics, and industrial handheld test equipment requiring stable component supply, long-lifecycle support, and TI-qualified SBS v1.1 compliance.
Supply support for BQ20Z70PWR-V160 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 leadership in battery management ICs.
The BQ20Z70PWR-V160 belongs to TI's Smart Battery Fuel Gauge product line, engineered specifically for high-accuracy, low-power, SBS-compliant battery monitoring in portable computing and mission-critical portable instrumentation.
FAQ
What is the primary function of the BQ20Z70PWR-V160 in a smart battery system?
The BQ20Z70PWR-V160 serves as the core SBS v1.1–compliant gas gauge and safety manager within a smart battery pack. It executes Impedance Track™ algorithms to calculate remaining capacity with <1% error, monitors cell voltage, current, and temperature via integrated ADCs, and communicates real-time battery status-including charging directives and fault alerts-over SMBus to the host system. Its role is autonomous and firmware-driven, requiring no host-side gauging computation.
Does the BQ20Z70PWR-V160 require an external crystal or oscillator?
No, the BQ20Z70PWR-V160 does not require an external crystal. It integrates both a 4.194 MHz high-frequency oscillator for CPU timing and a 32.768 kHz low-frequency oscillator for real-time clock and watchdog functions. The CLKOUT pin provides the 32.768 kHz signal directly to the bq29330 AFE's WDI pin, eliminating external timing components and reducing bill-of-materials cost and board space.
How does the BQ20Z70PWR-V160 interface with the bq29330 analog front-end?
The BQ20Z70PWR-V160 interfaces with the bq29330 through six dedicated pins: SDATA and SCLK for bidirectional digital control, VCELL+ and VCELL− for differential cell voltage acquisition, CLKOUT for driving the AFE's watchdog, and MRST for synchronized reset. This tightly coupled architecture allows the BQ20Z70PWR-V160 to command cell selection, retrieve calibrated voltage/temperature readings, and enforce protection decisions-forming a complete, minimal-component battery management solution.
What safety features does the BQ20Z70PWR-V160 provide beyond basic overvoltage and overcurrent protection?
Beyond first-level protections (cell over/under voltage, charge/discharge overcurrent, short circuit, overtemperature), the BQ20Z70PWR-V160 implements second-level safety enforcement via the SAFE pin (Pin 7). This active-high output can trigger irreversible actions such as blowing a fuse upon detection of critical faults-including safety overvoltage, safety overcurrent, AFE communication failure, or FET driver faults-ensuring fail-safe battery disablement even if primary protection layers are compromised.
Can the BQ20Z70PWR-V160 operate independently without the bq29330 AFE?
No, the BQ20Z70PWR-V160 is designed explicitly for co-operation with the bq29330 AFE and cannot operate as a standalone gas gauge. It relies on the bq29330 for cell voltage multiplexing, FET control, cell balancing, and high-voltage protection functions. The BQ20Z70PWR-V160 handles computation, communication, and safety logic-but delegates analog signal conditioning, high-side switching, and cell-level protection to the AFE. Their pin-to-pin interconnection is mandatory per TI's reference schematics.
BQ20Z70PWR-V160 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 4
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- SMBus
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
BQ20Z70PWR-V160 FAQ
1.How can I place an order for BQ20Z70PWR-V160 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z70PWR-V160 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 BQ20Z70PWR-V160 reliable?
The price and inventory of BQ20Z70PWR-V160 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z70PWR-V160 is usually 5 days.
3.What payment methods are accepted for BQ20Z70PWR-V160?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z70PWR-V160 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z70PWR-V160?
BQ20Z70PWR-V160 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z70PWR-V160 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 BQ20Z70PWR-V160?
For technical support, including BQ20Z70PWR-V160 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z70PWR-V160 requirements.
6.How does Aetrix verify that BQ20Z70PWR-V160 is sourced from the original manufacturer or authorized distributors?
All BQ20Z70PWR-V160 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 BQ20Z70PWR-V160 meets industry standards.
7.What is the process for return or replacement of BQ20Z70PWR-V160?
All BQ20Z70PWR-V160 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z70PWR-V160, 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 BQ20Z70PWR-V160 part is unused and in its original packaging.
Return procedure for BQ20Z70PWR-V160:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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