Features:
· Next Generation Patented Impedance TrackTM Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
- Better Than 1% Error Over Lifetime of the Battery
· Supports the Smart Battery Specification SBS V1.1
· Flexible Configuration for 2 to 4 Series Li-Ion and Li-Polymer Cells
· Powerful 8-Bit RISC CPU With Ultra-LowPower Modes
· Full Array of Programmable Protection Features
- Voltage, Current, and Temperature
· Supports SHA-1 Authentication
·Complete Battery Protection and Gas Gauge Solution in one Package
· Small 44-Pin TSSOP (DBT) package
Application· Notebook PCs
· Medical and Test Equipment
· Portable InstrumentationSpecifications
|
|
DESCRIPTION |
PIN |
UNIT |
|
VSS |
Supply voltage range |
VBAT, VCC |
0.3 V to 34 V |
| PACK, PMS |
0.3 V to 34 V |
| VC(n)-VC(n+1); n = 1, 2, 3, 4 |
0.3 V to 8.5 V |
| VC1, VC2, VC3, VC4 |
0.3 V to 34 V |
| VC5 |
0.3 V to 1 V |
|
VIN |
Input voltage range |
PFIN, SMBD, SMBC, LED1, LED2,
LED3, LED4, LED5, DISP |
0.3 V to 6 V |
TS1, TS2, SAFE, VCELL+, PRES;
ALERT |
0.3 V to V(REG25) + 0.3 V |
| MRST, GSRN, GSRP, RBI |
0.3 V to V(REG25) + 0.3 V |
| ASRN, ASRP |
1 V to 1 V |
|
VOUT |
Output voltage range |
DSG, CHG, GPOD |
0.3 V to 34 V |
| ZVCHG |
0.3 V to V (BAT) |
| TOUT, ALERT, REG33 |
0.3 V to 6 V |
| RESET |
0.3 V to 7 V |
| REG25 |
0.3 V to 2.75 V |
|
ISS |
Maximum combined sink current for input pins |
PRES, PFIN, SMBD, SMBC, LED5,
LED4, LED3, LED2, LED1 |
50 mA |
|
TA |
Operating free-air temperature range |
|
40°C to 85°C |
|
TF |
Functional temperature |
|
40°C to 100°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.
DescriptionThe bq20z95 SBS-compliant gas gauge and protection IC is a single IC solution designed for battery-pack or in-system installation. The bq20z95 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals, monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack of bq20z95 as well and reports the information to the system host controller over a serial-communication bus. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq20z95 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.
The implemented Impedance TrackTM gas gauging technology of bq20z95 continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. bq20z95 enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle with high accuracy.
bq20z95 Data Sheet
