The bq2050h is a high precision lithium ion battery capacity counter that can be used for battery packs or system integration. It has low power consumption, high integration, high accuracy, and high reliability.
The bq2050H Lithium Ion Power Gauge IC is designed for battery-pack or in-system installation to maintain an accurate record of available battery capacity. It monitors voltage drops across a sense resistor to determine charge and discharge activity, with automatic compensation for battery temperature, self-discharge, and discharge rate.
The device features a 5kb single-wire communication interface (HDQ bus) for critical battery parameters and can directly drive remaining capacity LEDs. It operates from the batteries in the pack using a simple voltage regulator and includes internal registers for available capacity, temperature, and battery status.
| Operating Current | 120A typical |
|---|---|
| Data Retention Current | Less than 100nA |
| Communication Interface | 5kb single-wire |
| Package Type | 16-pin narrow SOIC |
| Temperature Range | -35°C to +85°C |
| EDV Threshold 1 | 0.76V |
| EDV Threshold Final | 0.735V |
It can be reset by removing Vcc and grounding the RBI pin for 15 seconds, or by commands over the serial port.
The RBI input pin provides backup potential to the internal bq2050H registers when Vcc drops below 3.0V.
It internally determines the temperature in 10°C steps centered from approximately -35°C to +85°C.