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Product InformationFeatures
IMPEDANCE TRACK Is a trademark of Texas Instruments Description
The bq20z70 SBS-compliant gas gauge IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z70 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z70 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and reports the information to the system host controller over a serial-communication bus. It is designed to work with the bq29330 analog front-end (AFE) protection IC to maximize functionality and safety, and minimize component count and cost in smart battery circuits. The Impedance Track technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle. |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| BQ20Z70PW | NRND | -40 to 85 | 4.55 | 1ku | TSSOP (PW) | 20 | View | 70 | TUBE | Not Available | ||
| BQ20Z70PWG4 | NRND | -40 to 85 | 4.55 | 1ku | TSSOP (PW) | 20 | View | 70 | TUBE | Not Available | ||
| BQ20Z70PWR | NRND | -40 to 85 | 4.10 | 1ku | TSSOP (PW) | 20 | View | 2000 | LARGE T&R | Not Available | ||
| BQ20Z70PWRG4 | NRND | -40 to 85 | 4.10 | 1ku | TSSOP (PW) | 20 | View | 2000 | LARGE T&R | Not Available | ||
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| TI Inventory Status | Reported Distributor Inventory | |||||
| BQ20Z70PW | As of 12:04 PM GMT, 03 Jul 2009 | As of 12:04 PM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 4 Weeks | Europe | Avnet-SILICA | 420 | |||
| BQ20Z70PWG4 | As of 12:04 PM GMT, 03 Jul 2009 | As of 12:04 PM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 4 Weeks | None Reported View Distributors | |||||
| BQ20Z70PWR | As of 12:04 PM GMT, 03 Jul 2009 | As of 12:04 PM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 16 Weeks | None Reported View Distributors | |||||
| BQ20Z70PWRG4 | As of 12:04 PM GMT, 03 Jul 2009 | As of 12:04 PM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 16 Weeks | None Reported View Distributors | |||||
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
| BQ20Z70PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| BQ20Z70PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| BQ20Z70PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| BQ20Z70PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.
Most useful technical documents for BQ20Z70 
View Application Notes for Battery Fuel Gauges
| Name | Part # | Company | Tool / Software Type |
| BQ20Z70EVM Evaluation Module for 2nd Generation Impedance Track(TM) | BQ20Z70EVM-001 | Texas Instruments | Development Boards/EVMs |
| BQMTESTER Multi Channel Test and Program Board | BQMTESTER | Texas Instruments | Development Boards/EVMs |
| Single Channel Tester | BQTESTER | Texas Instruments | Development Boards/EVMs |
| bqEASY(TM) For Single Cell Impedance Track(TM) Devices | BQEASY-SW | Texas Instruments | Application Software |
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