The bq2052 Lithium Primary Gas Gauge IC is intended for battery-pack or in-system installation to maintain an accurate record of available battery capacity. The IC monitors a voltage drop across a sense resistor connected in series with the cells to determine discharge activity of the battery. The bq2052 applies compensations for battery temperature and discharge rate to the available charge counter to provide available capacity information across a wide range of operating conditions. Compensated available capacity may be directly indicated using an LED display. The LED display is programmable and can be configured as two, four, or five segments. These segments are used to depict available battery capacity. The bq2052 supports a single-wire serial communications link to an external micro-controller. The link allows the micro-controller to read
The BQ2052 is a Lithium Primary Gas Gauge IC designed for battery-pack or in-system installation to maintain an accurate record of available battery capacity. It monitors voltage drop across a sense resistor to determine discharge activity and compensates for temperature and discharge rate to provide accurate available capacity information.
The IC supports single-wire communication (HDQ bus) and can drive LEDs to indicate remaining capacity in three selectable modes. Measurements are automatically compensated for discharge rate and temperature, and the device operates from the batteries in the pack using an external FET and REF output for voltage regulation.
| Operating Current (Data Retention) | Less than 100nA |
|---|---|
| Package Type | 16-pin narrow SOIC |
| Communication Interface | Single-wire (HDQ bus) |
| Sense Resistor Input Threshold | 250 µV |
| Voltage Monitoring Range | Up to 0.5V |
It supports Lithium primary batteries such as Lithium Sulphur Dioxide and Lithium Manganese Dioxide.
It communicates remaining capacity with direct drive of LEDs in three selectable modes.
The RBI pin provides backup potential to the bq2052 registers during periods when VCC is less than or equal to 3V.