Overview
The Texas Instruments BQ27220YZFR is a single-cell battery fuel gauge designed for use in pack or system-side applications. It utilizes the Compensated End-of-Discharge Voltage (CEDV) algorithm to provide accurate battery fuel gauging. This device requires minimal user configuration and system microcontroller firmware development, facilitating quick system integration. The BQ27220YZFR supports both embedded and removable batteries and operates directly from the battery with an integrated Low Dropout Regulator (LDO). It is particularly suited for space-constrained applications due to its small 9-ball, 1.62 mm × 1.58 mm, 0.5-mm pitch NanoFree™ chip scale package (DSBGA).
Key Specifications
| Parameter | Value |
|---|---|
| Package | 9-pin DSBGA (YZF) |
| Operating Temperature Range | -40°C to 85°C |
| Power Consumption (NORMAL mode) | 50 µA |
| Power Consumption (SLEEP mode) | 9 µA |
| I2C Serial Interface Frequency | 400 kHz |
| Sense Resistor Value | 10 mΩ (typical) |
| Temperature Sensing | Internal, Host-Reported, or External Thermistor |
| Dimensions | 1.62 mm × 1.58 mm, 0.5-mm pitch |
Key Features
- Single-Cell Li-Ion Battery Fuel Gauge
- Resides in Pack or on System Board
- Supports Embedded or Removable Batteries
- Powers Directly from Battery with Integrated LDO
- Ultra-Low Power Consumption in NORMAL (50 µA) and SLEEP (9 µA) Modes
- Battery Fuel Gauging Based on Compensated End-of-Discharge Voltage (CEDV) Technology
- Reports Remaining Capacity and State-of-Charge (SOC) with Smoothing Filter
- Adjusts Automatically for Battery Aging, Self-Discharge, Temperature, and Rate Changes
- Provides Battery State-of-Health (Aging) Estimation
- Microcontroller Peripheral Supports: 400-kHz I2C Serial Interface, Configurable SOC Interrupt or Battery Low Digital Output Warning
- Internal Temperature Sensor or Host-Reported Temperature or External Thermistor
Applications
- Smartphones and Feature Phones
- Tablets
- Wearables
- Building Automation
- Portable Medical/Industrial Handsets
- Portable Audio
- Gaming Devices
Q & A
- What is the BQ27220YZFR used for?
The BQ27220YZFR is a single-cell battery fuel gauge used for accurate battery capacity and state-of-charge monitoring in various applications.
- What algorithm does the BQ27220YZFR use for fuel gauging?
The BQ27220YZFR uses the Compensated End-of-Discharge Voltage (CEDV) algorithm for fuel gauging.
- What are the power consumption modes of the BQ27220YZFR?
The device operates in NORMAL mode (50 µA) and SLEEP mode (9 µA).
- How does the BQ27220YZFR support temperature sensing?
The device supports temperature sensing through an internal temperature sensor, host-reported temperature, or an external thermistor.
- What is the package type and size of the BQ27220YZFR?
The BQ27220YZFR comes in a 9-pin DSBGA (YZF) package with dimensions of 1.62 mm × 1.58 mm and a 0.5-mm pitch.
- Can the BQ27220YZFR be used with both embedded and removable batteries?
- What is the I2C serial interface frequency of the BQ27220YZFR?
The I2C serial interface frequency is 400 kHz.
- How does the BQ27220YZFR adjust for battery aging and other factors?
The device adjusts automatically for battery aging, self-discharge, temperature, and rate changes.
- What kind of sense resistor is supported by the BQ27220YZFR?
The device supports a low-value (10 mΩ) external sense resistor.
- Can custom chemistry parameters be programmed into the BQ27220YZFR?
