Features: ` Patented Impedance Track™ Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
` Better than 1% Error Over Lifetime of the Battery
` Instant Accuracy No Learning Cycle Required
` Supports the Smart Battery Specification SBS V1.1
` Works With the TI bq29312A Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
` Full Array of Programmable Voltage, Current,and Temperature Protection Features
` Integrated Time Base Removes Need for External Crystal with Optional Crystal Input
` Electronics for 7.2-V, 10.8-V or 14.4-V Battery Packs With Few External Components
` Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
` Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
` Measures Charge Flow Using a High-Resolution, 16-Bit Integrating Delta-Sigma Converter
Better Than 0.65-nVh of Resolution
Self-Calibrating
Offset Error Less Than 1-V
` Uses 16-Bit Delta-Sigma Converter for Accurate Voltage and Temperature Measurements
` Extensive Data Reporting Options For Improved System Interaction
` Optional Pulse Charging Feature for Improved Charge Times
` Drives 3-, 4- or 5-Segment LED Display for Remaining Capacity Indication
Application· Notebook PCs
· Medical and Test Equipment
· Portable InstrumentationPinout
Specifications
| |
|
RANGE |
| VDDAand VDDD relative to VSS (2) |
Supply voltage range |
0.3 V to 4.1 V |
| V(IOD) relative to VSS (2) |
Open-drain I/O pins |
0.3 V to 6 V |
| VI relative to VSS (2) |
Input voltage range to all other pins |
0.3 V to VDDA + 0.3 V |
| TA |
Operating free-air temperature range |
40°C to 85°C |
| Tstg |
Storage temperature range |
65°C to 150°C |
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) VSS refers to the common node of V(SSA) and V(SSD).
DescriptionThe bq20z80 SBS-compliant gas gauge IC,
V1.1 incorporating patented Impedance Track technology of bq20z80-V101,
for battery-pack or in-system installation.
Front-End (AFE) Protection IC to Provide rTehceorbdq2o0f z8a0vaimlaebalesucrehsargaendinmaLiin-itoaninsoranLi-apcocluyrmaeter batteries using bq20z80-V101 integrated high-performance analog peripherals. The bq20z80 monitors apacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and reports the information to the system host controller over a serial-communication bus. bq20z80-V101 is designed to work with the bq29312A analog front-end (AFE) protection IC to maximize functionality and safety, and minimize component count and cost in smart battery circuits.
The Impedance Track technology of bq20z80-V101 continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle.
bq20z80-V101 Data Sheet
