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BQ20Z70, BQ20Z70/BQ29330, BQ20Z704

Table of contents:
Info of BQ20Z70
Info of BQ20Z70/BQ29330
Info of BQ20Z704

BQ20Z70, BQ20Z70/BQ29330, BQ20Z704 Selling Leads, Datasheet

MFG:TI Package Cooled:TSSOP20 D/C:2008

BQ20Z70, BQ20Z70/BQ29330, BQ20Z704 Picture

BQ20Z70, BQ20Z70/BQ29330, BQ20Z704 Datasheet download

Five Points

Part Number: BQ20Z70

MFG: TI

Package Cooled: TSSOP20

D/C: 2008

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BQ20Z70 General Description

The bq20z70 SBS-compliant gas gauge IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z70 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z70 monitors capacity 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. It is designed to work with the bq29330 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 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.

BQ20Z70 Maximum Ratings

		RANGE
V_CC relative to V_SS⁽²⁾	Supply voltage range on V_CC pin	0.3 V to 2.75 V
V_(IOD)relative to V_SS⁽²⁾	XALERT, PFIN, SAFE, SMBD, SMBC, SDATA, SCLK,	0.3 V to 6.0 V
VI relative to V_SS⁽²⁾	TS2, TS1, CLKOUT, PRES, SRP, SRN, MRST, VCELL+,VCELL-	0.3 V to V_CC + 0.3 V
T_A	Operating free-air temperature range	40°C to 85°C
T_stg	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) V_SS refers to Voltage at VSS pin.

BQ20Z70 Features

` Next Generation 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
` Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
` Works With the TI bq29330 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
` Full Array of Programmable Protection Features
    Voltage, Current and Temperature
` Fully Integrated High Accurate Clock
` Flexible Configuration for 2 to 4 Series Li-Ion and Li-Polymer Cells
` Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
` Smart Battery Charger Control Feature
` Two 16-Bit Delta-Sigma Converter
Accurate Voltage and Temperature Measurements
Integrating Coloumb Counter for Charge Flow
    ` Better Than 0.65 nVh of Resolution
    ` Self-Calibrating
` Supports SHA-1 Authentication
` 20-Pin TSSOP (PW)

BQ20Z70 Typical Application

· Notebook PCs
· Medical and Test Equipment
· Portable Instrumentation

BQ20Z70 Connection Diagram

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