The bq20z40-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z40-R1 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. Thebq20z40-R1 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, while minimizing external 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 the remaining capacity to be calculated with discharge rate, temperature, and cell aging, which are all accounted for during each stage of every cycle.
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View full reportTechnical parameters
| Environment and package | |
|---|---|
| Operating temperature range (°C) | -40 to 85 |
| Other | |
| Battery capacity (max) (mAh) | 32000 |
| Battery capacity (min) (mAh) | 800 |
| Cell balancing | Internal |
| Cell chemistry | Li-Ion/Li-Polymer |
| Communication interface | SMBus |
| External capacity indication | LED |
| Implementation | Pack |
| Number of series cells | 2-4 Cells |
| Rating | Catalog |