BQ26220
Flash-based precision multi-chemistry charge/discharge counter w/ voltage measurement and HDQ comm
BQ26220
- Multifunction Monitoring Integrated Circuit Designed to Work With an Intelligent Host Controller :
- Provides State of Charge Information for Rechargeable Batteries
- Provides Accurate Battery Voltage and Temperature Measurement
- High Accuracy Coulometric Charge and Discharge Current Integration With Automatic Offset Compensation
- 11-Bit Analog-to-Digital Converter Reports Battery Voltage With Gain and Offset Correction
- Differential Current Sense
- 32 Bytes of General Purpose RAM
- 96 Bytes of Flash (Including 32 Bytes of Shadow Flash)
- 8 Bytes of ID ROM
- Internal Temperature Sensor Eliminates the Need for an External Thermistor
- Programmable Digital Input/Output Port
- High-Accuracy Internal Timebase Eliminates External Crystal Oscillator
- Low Power Consumption:
- Operating : 30 µA
- Sleep: 1 µA
- Hibernate: 600 nA
- Single-Wire HDQ Serial Interface
- Packaging: 8-LEAD TSSOP
The bq26220 is an advanced battery monitoring device designed to accurately measure the charge and discharge currents in rechargeable battery packs. Intended for pack integration, the bq26220 contains all the necessary functions to form the basis of a comprehensive battery capacity management system in portable applications such as cellular phones, PDA’s, or other portable products.
The bq26220 works with the host controller in the portable system to implement the battery management system. The host controller is responsible for interpreting the bq26220 data and communicating meaningful battery data to the end-user or power management system.
This device provides 64 bytes of general-purpose flash memory, 8 bytes of ID ROM and 32 bytes of flash-backed RAM for data storage. The nonvolatile memory can maintain formatted battery monitor information, identification codes, warranty information, or other critical battery parameters during periods when the battery is temporarily shorted or deeply discharged.
Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | High-Performance Battery Monitor IC with Coulomb Counter datasheet (Rev. B) | 30 Jan 2004 | |
| Application note | HDQ Communication Basics (Rev. A) | 18 Sep 2008 | ||
| Application note | Choosing Between Battery Gas Gauges & Monitors to Track Charge Availabilility | 27 Sep 2005 | ||
| Application note | HDQ Compatibility Between OMAP and BQ Products | 17 Jun 2004 | ||
| Application note | Gas Gauging Basics Using TI Battery Monitor ICs (Rev. A) | 17 Oct 2003 |
Design & development
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| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 8 | View options |
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