Overview
The Texas Instruments BQ27411-G1 device is a battery fuel gauging solution designed for single-cell Li-Ion battery packs. It requires minimal configuration and utilizes One Time Programmable (OTP) Non-Volatile Memory (NVM) to avoid the need for an initialization download by the system processor. The device employs the patented Impedance Track™ algorithm for accurate fuel gauging, providing information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV). The small 12-pin Small Outline No-Lead (SON) package, measuring 2.50 mm × 4.00 mm, is ideal for space-constrained applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VBAT (BAT pin input voltage range) | -0.3 | 6 | V | |
| VSR (SRP and SRN pins input voltage range) | -0.3 | VBAT + 0.3 | V | |
| Differential voltage across SRP and SRN | 2 | V | ||
| VDD (VDD pin supply voltage range) | -0.3 | 2 | V | |
| CBAT (External input capacitor for internal LDO) | 0.1 | μF | ||
| CLDO (External output capacitor for internal LDO) | 0.47 | μF | ||
| ICC (NORMAL mode current) | 93 | μA | ||
| ISLP (SLEEP mode current) | 21 | μA | ||
| IHIB (HIBERNATE mode current) | 9 | μA | ||
| ISD (SHUTDOWN mode current) | 0.6 | μA |
Key Features
- Powered directly from the battery with an integrated LDO regulator.
- 400-kHz I2C serial interface for communication with the system processor.
- Internal temperature sensor or host-reported temperature for accurate measurements.
- Battery fuel gauging based on the patented Impedance Track™ technology.
- Reports remaining capacity and state of charge (SOC) with a smoothing filter.
- Automatically adjusts for battery aging, self-discharge, temperature, and rate changes.
- Battery state of health (aging) estimation.
- Low-value external sense resistor (10 mΩ typical).
- One Time Programmable (OTP) configuration with Non-Volatile Memory (NVM).
- Multiple power modes (INITIALIZATION, NORMAL, SLEEP, HIBERNATE) to minimize power consumption.
Applications
- Smartphones, feature phones, and tablets.
- Digital still and video cameras.
- Handheld terminals.
- MP3 or multimedia players.
Q & A
- What is the primary function of the BQ27411-G1 device?
The BQ27411-G1 is a battery fuel gauging solution for single-cell Li-Ion battery packs, providing accurate measurements of remaining capacity, state of charge, and battery voltage.
- What algorithm does the BQ27411-G1 use for fuel gauging?
The device uses the patented Impedance Track™ algorithm for accurate fuel gauging.
- How does the BQ27411-G1 handle temperature measurements?
The device has an internal temperature sensor, but it can also use temperature data provided by the host processor.
- What are the different power modes of the BQ27411-G1?
The device has multiple power modes including INITIALIZATION, NORMAL, SLEEP, and HIBERNATE to minimize power consumption.
- What is the typical package size of the BQ27411-G1?
The device comes in a 12-pin Small Outline No-Lead (SON) package, measuring 2.50 mm × 4.00 mm.
- How does the BQ27411-G1 adjust for battery aging and other factors?
The device automatically adjusts for battery aging, self-discharge, temperature, and rate changes to provide accurate measurements.
- What is the purpose of the external sense resistor in the BQ27411-G1?
The external sense resistor, typically 10 mΩ, is used to measure the charging or discharging of the battery by monitoring the voltage across it.
- How does the BQ27411-G1 communicate with the system processor?
The device uses a 400-kHz I2C serial interface for communication with the system processor.
- What are some common applications of the BQ27411-G1?
Common applications include smartphones, feature phones, tablets, digital cameras, handheld terminals, and MP3 or multimedia players.
- What kind of memory does the BQ27411-G1 use for configuration?
The device uses One Time Programmable (OTP) Non-Volatile Memory (NVM) for configuration to avoid the need for an initialization download by the system processor.
