bq2019 is a battery monitoring IC released by Texas Instruments. It is mainly used in portable applications such as mobile phones, PDAs or other portable products. The chip can measure the charge and discharge currents of the battery and provides 64 bytes of general-purpose flash storage space for storing battery data.
The bq2019 is an advanced battery-monitoring IC designed to work with intelligent host controllers in portable applications such as cellular phones and PDAs. It accurately measures charge and discharge currents in rechargeable battery packs and provides state-of-charge information. The device includes 64 bytes of general-purpose flash memory, 8 bytes of ID ROM, and 32 bytes of flash-backed RAM to maintain critical battery parameters even when the battery is shorted or deeply discharged.
The IC supports single-cell Li-ion or 3-cell NiMH batteries and operates with a supply voltage between 2.8 V and 5.5 V. It features a single-wire HDQ serial interface, an internal temperature sensor to eliminate the need for an external thermistor, and an optional regulated output (REG) to drive an external pass transistor for power regulation in multicell applications.
| Supply voltage | 2.8 V to 5.5 V |
|---|---|
| Operating temperature range | -20°C to 70°C |
| Flash memory size | 64 bytes |
| RAM size | 32 bytes |
| Data retention | 5 Years |
| Flash programming write-cycles | 10000 Cycles |
| Packaging | 8-Lead TSSOP |
The device is ideal for single-cell Li-ion or 3-cell NiMH batteries.
No, it features a high-accuracy internal timebase that eliminates the need for an external crystal oscillator.