FFG1040UC003X: Single-Cell Fuel Gauge

The FFG1040 fuel gauge is a very accurate SOC reporting gauge designed to be used with cell phones, tablets and other portable devices. It uses a proprietary algorithm that tracks the battery to accurately report the Relative State-of-Charge (RSOC). The FFG1040 also reports User State-of-Charge (USOC), which is an adjusted RSOC value that is designed to be intuitive to the end user. The FFG1040 works with 1sXp (multiple parallel) battery configurations.

The FFG1040 includes an integrated temperature sensor that can be configured to read temperature from an external thermistor. The FFG1040 algorithm uses battery voltage, current and temperature to provide the most accurate State-of-Charge to a user. The temperature readings are accessible via I2C for other system level decision.

In addition to RSOC & USOC, the FFG1040 also reports battery voltage, current, capacity, cycle count and battery resistance.

The FFG1040 has the unique capability to relay I2C commands to a secondary slave device.

When used in autonomous mode the FFG1040 can directly control the FFG3105 pack side monitor and ID device and report the temperature and cell voltage information directly from the battery pack.

The FFG1040 utilizes a 3 x 4 ball, 0.5 mm pitch, WLCSP with nominal dimensions of 1.51 x 1.96 mm.

Features

• Optional Battery Characterization Supported
• Typical Relative SOC Error ≈ 1%
• Support RSENSE down to 3 mΏ to Reduce SystemLoss
• Low Power: <3 μA Shutdown Current
  • 100 μA Active Current
• 100 μA Active Current
• Integrated I²C Slave
• Interrupt Pin to Alert the Host Processor of System Events (e.g. Low Battery, Low SOC)
• Capable of measuring both on-die and battery pack temperature using external thermistor
• Host Side or Battery Pack Gauging Capable
• I²C relay Master to Support Secondary Slave
• Autonomous control of pack side FFG3105 battery monitor and ID with configurable auto polling
• Configurable I2C Inactivity Monitor for Auto Shutdown
• 12-ball Chip Scale Package (WLCSP)