BQ2050HSN-A508TR ,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-A508TRG4 ,Li-Ion Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED Drivers 16-SOIC 0 to 70Not Recommended For New Designsbq2050HLow-Cost Lithium Ion Power Gauge™ ICments are used to graphic ..
BQ2050SN , Lithium Ion Power Gauge™ IC
BQ2050SN , Lithium Ion Power Gauge™ IC
BQ2050SN , Lithium Ion Power Gauge™ IC
BQ2050SN , Lithium Ion Power Gauge™ IC
BUF634U ,250mA HIGH-SPEED BUFFERSample & Support &Product Tools &TechnicalCommunityBuyFolder Documents SoftwareBUF634SBOS030A–SEPTE ..
BUF636A , Silicon NPN High Voltage Switching Transistor
BUF636A , Silicon NPN High Voltage Switching Transistor
BUF644 ,Silicon NPN High Voltage Switching TransistorApplicationsElectronic lamp ballast circuits Switch-mode power supplies
BUF644 ,Silicon NPN High Voltage Switching TransistorAbsolute Maximum RatingsT = 25°C, unless otherwise specifiedcaseParameter Test Conditions Symbol Va ..
BUF644 ,Silicon NPN High Voltage Switching TransistorFeatures
BQ2050H-BQ2050HSNA508-BQ2050HSN-A508-BQ2050HSN-A508G4-BQ2050HSN-A508TR-BQ2050HSN-A508TRG4
Li-Ion Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED Drivers
Features Accurate measurement of avail-
able capacity in Lithium Ion bat-
teries Provides a low-cost battery man-
agement solution for pack
integration
Complete circuit can fit in as
little as12 square inch of PCB
Lowoperating current (120µA
typical)
Less than 100nA of data
retention current High-speed (5kb) single-wire
communication interface (HDQ
bus) for critical battery
parameters Monitors and controls charge FET Li-Ion pack protection circuit Direct driveof remaining capacity
LEDs Measurements automatically
compensated for rate and
temperature 16-pin narrow SOIC
General DescriptionThe bq2050H 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, self discharge,
and rateof discharge are appliedto
the charge counterto provide avail-
able capacity information acrossa
wide rangeof operating conditions.
Battery capacityis automaticallyre-
calibrated,or “learned,”in the
courseofa discharge cycle from full
toempty.
Nominal available capacity maybe
directly indicated usinga five-
segment LED display. These seg-
ments are usedto graphically indi-
cate available capacity. The
bq2050H also supportsa simple
single-line bidirectional serial linkan external processor (common
ground). The 5kb HDQ bus interface
reduces communications overheadthe external microcontroller.
Internal registers include available
capacity, temperature, scaled avail-
able energy, battery ID, battery
status, and Li-Ion charge FET
status. The external processor may
also overwrite someof the bq2050H
power gauge data registers.
The bq2050H can operate from the
batteriesinthe pack. The REF out-
put andan external transistor allow simple, inexpensive voltage regu-
latorto supply powerto the circuit
fromthe cells.
bq2050HLCOM LED common output
SEG1/PROG1 LED segment1/
program1 input
SEG2/PROG2 LED segment2/
program2 input
SEG3/PROG3 LED segment3/
program3 input
SEG4/PROG4 LED segment4/
program4 input
SEG5/PROG5 LED segment5/
program5 input
CFC Charge FET control
output
VSS System ground Sense resistor input
DISP Display control input Battery sense input
RBI Register backup input
HDQ Serial communications
input/output
PSTAT Protector status input
REF Voltagereference output
VCC Supply voltage
Pin ConnectionsSLUS150–MAY 1999 D
Low-Cost Lithium Ion Power Gauge™ IC
Pin NamesNot Recommended For New Designs
