BQ2050 ,Li-Ion Gas Gauge With 1-Wire (DQ) Interface And 5 LED DriversNot Recommended For New Designsbq2050Lithium Ion Power Gauge™ ICsupports a simple single-line bidi-
BQ2050H ,Li-Ion Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED DriversNot Recommended For New Designsbq2050HLow-Cost Lithium Ion Power Gauge™ ICments are used to graphic ..
BQ2050HSN , Low-Cost Lithium Ion Power Gauge IC
BQ2050HSN , Low-Cost Lithium Ion Power Gauge IC
BQ2050HSN , Low-Cost Lithium Ion Power Gauge IC
BQ2050HSN , Low-Cost Lithium Ion Power Gauge IC
BUF601AU ,HIGH-SPEED BUFFER AMPLIFIER
BUF602ID ,High Speed, Closed Loop Buffer 8-SOIC -45 to 85FEATURES DESCRIPTION2• Wide Bandwidth: 1000MHzThe BUF602 is a closed-loop buffer recommended for• H ..
BUF602IDBVR ,High Speed, Closed Loop Buffer 5-SOT-23 -45 to 85This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated cir ..
BUF602IDR ,High Speed, Closed Loop Buffer 8-SOIC -45 to 85ELECTRICAL CHARACTERISTICS: V = ±5VSBoldface limits are tested at +25°C.At R = 100Ω, unless otherwi ..
BUF620 ,Silicon NPN High Voltage Switching TransistorAbsolute Maximum RatingsT = 25°C, unless otherwise specifiedcaseParameter Test Conditions Symbol Va ..
BUF620 ,Silicon NPN High Voltage Switching TransistorFeatures
BQ2050-BQ2050SN-D119-BQ2050SN-D119G4-BQ2050SND119TR-BQ2050SN-D119TR-BQ2050SN-D119TRG4
Li-Ion Gas Gauge With 1-Wire (DQ) Interface And 5 LED Drivers
Features Conservative and repeatable
measurementof available capac-
ityin Lithium Ion rechargeable
batteries Designed for battery pack inte-
gration
120µA typical operating
current
Small size enables imple-
mentations in as little as12square inch of PCB Integrate withina systemorasa
stand-alonedevice
Display capacity via single-
wire serial communication
port or direct drive of LEDs Measurements compensatedfor
current andtemperature Self-discharge compensation us-
ing internaltemperature sensor 16-pin narrow SOIC
General DescriptionThe bq2050 Lithium Ion Power
Gauge™ICis intendedfor battery-
packor in-system installationto
maintainan accurate recordof
available battery capacity. TheIC
monitorsa voltage drop acrossa
sense resistor connectedin series
between the negative battery termi-
nal and groundto determine
charge and discharge activityof
the battery. Compensationsfor bat-
tery temperature and rateof charge discharge are appliedto the
charge, discharge, and self-discharge
calculationsto provide availableca-
pacity information acrossa wide
rangeof operating conditions. Bat-
tery capacityis automatically recali-
brated,or “learned,”in the courseof discharge cycle fromfullto empty.
Nominal available capacity maybe
directly indicated usinga five-
segment LED display. These seg-
ments are usedto graphically indi-
cate available capacity. The bq2050
supportsa simple single-line bidi-
rectional serial linktoan external
processor (common ground). The
bq2050 outputs battery information responseto external commands
overthe serial link.
The bq2050 may operate directly
from one cell (VBAT> 3V). With the
REF output andan external transis-
tor,a simple, inexpensive regulator
canbe builtfor systems with more
than oneseries cell.
Internal registers include available
capacity, temperature, scaled avail-
able energy, battery ID, battery
status, and programming pin set-
tings.To support subassembly test-
ing, the outputs may alsobe con-
trolled. The external processor may
also overwrite someof the bq2050
power gauge data registers.
LCOM LED common output
SEG1/PROG1 LED segment 1/
program 1 input
SEG2/PROG2 LED segment 2/
program 2 input
SEG3/PROG3 LED segment 3/
program 3 input
SEG4/PROG4 LED segment 4/
program 4 input
SEG5/PROG5 LED segment 5/
program 5 input
PROG6 Program 6 input
REF Voltage reference output
N/C No connect Serial communications
input/output
RBI Register backup input Battery sense input
DISP Display control input Sense resistor input
VCC 3.0–6.5V
VSS System ground
Pin Connections Pin Names
bq20509/96 C
Lithium Ion Power Gauge™ ICNot Recommended For New Designs
