BQ2011 ,NiCd Gas Gauge For High Discharge Rates (>5A), Small Pack Capacities (<2Ah)General Descriptionrectly indicated using a five-seg-➤ Conservative and repeatable The bq2011 Gas G ..
BQ2011K ,Gas Gauge IC for High Discharge Rates
BQ2011KSN-D121 , GAS GAUGE FOR HIGH DISCHARGE RATES ()5A), SMALL PACK CAPACITIES ((2AH), (5 MOHM SENSE RESISTOR WITH
BQ2011KSN-D121 , GAS GAUGE FOR HIGH DISCHARGE RATES ()5A), SMALL PACK CAPACITIES ((2AH), (5 MOHM SENSE RESISTOR WITH
BQ2011KSN-D121 , GAS GAUGE FOR HIGH DISCHARGE RATES ()5A), SMALL PACK CAPACITIES ((2AH), (5 MOHM SENSE RESISTOR WITH
BQ2011SN-D118 ,NiCd Gas Gauge For High Discharge Rates (>5A), Small Pack Capacities (<2Ah)General Descriptionrectly indicated using a five-seg-➤ Conservative and repeatable The bq2011 Gas G ..
BUD42D ,High Speed, High Gain Bipolar NPN TransistorELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted)CÎÎÎCharacteristic Symbol Min Typ Max U ..
BUF01900AIPW ,Reference Voltage Generator for VCOM Adjustment 8-TSSOP MAXIMUM RATINGSSupply Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
BUF04 ,Closed-Loop High Speed BufferCHARACTERISTICSGain A R = 2 kΩ, 0.995 0.9977 1.005 V/VVCL L–40°C ≤ T ≤ +85°C 0.995 1.005 V/VAGain L ..
BUF04701AIDGS ,4-Channel, 12V, CMOS Buffer AmplifierELECTRICAL CHARACTERISTICS: V = +3.5V to +12VSBoldface limits apply over the specified temperature ..
BUF04701AIDGSR ,4-Channel, 12V, CMOS Buffer Amplifierfeatures rail-* HIGH SLEW RATE: 10V/µ sto-rail input and output capability, giving maximum dynamic* ..
BUF04701AIPWR ,4-Channel, 12V, CMOS Buffer AmplifierMAXIMUM RATINGSELECTROSTATICSupply Voltage, V+ to V– .. 13.2VDISCHARGE SENSITIVITY(2)Signal Input T ..
BQ2011-BQ2011SN-D118-BQ2011SN-D118TR
NiCd Gas Gauge For High Discharge Rates (>5A), Small Pack Capacities (<2Ah)
Features Conservative and repeatable
measurementof available charge
inrechargeable batteries Designedfor portable equipment
suchas power tools with high dis-
charge rates Designed for battery pack inte-
gration
120µA typical standby current
(self-dischargeestimationmode)
Small size enables imple-
mentations in as little assquare inch of PCB Direct driveof LEDsfor capacity
display Self-discharge compensation us-
ing internaltemperature sensor Simple single-wire serial commu-
nications port for subassembly
testing 16-pin narrow SOIC
General DescriptionThe bq2011 Gas GaugeICis intended
for battery-pack installationto main-
tainan accurate recordof available
battery charge. TheIC monitorsa
voltage drop acrossa sense resistor
connectedin series betweenthe nega-
tive battery terminal and groundto
determine charge and dischargeac-
tivityof the battery. The bq2011is
designedfor systems suchas power
tools with very high discharge rates.
Battery self-dischargeis estimated
basedonan internal timer and tem-
perature sensor. Compensationsfor
battery temperature and rateof
chargeor discharge are appliedto
the charge, discharge, and
selfdischarge calculationsto provide
available charge information across wide rangeof operating conditions.
Initial battery capacityis set using
the PFC and MODE pins. Actual
battery capacityis automatically
“learned”in the courseofa dis-
charge cycle from fullto empty and
maybe displayed dependingon the
display mode.
Nominal available charge maybedi-
rectly indicated usinga five-seg-
ment LED display. These segments
are usedto indicate graphically the
nominalavailablecharge.
The bq2011 supportsa simple single-
line bidirectional serial linktoan exter-
nal processor (common ground). The
bq2011 outputs battery informationin
responseto external commands overthe
serial link.To support subassembly
testing, the outputs may alsobe con-
trolledby command. The external proc-
essor may also overwrite someof the
bq2011gasgauge data registers.
The bq2011 may operate directly
from four cells. Withthe REF output
andan external transistor,a simple,
inexpensive regulator canbe builtto
provide VCC froma greater number cells.
Internal registers include available
charge, temperature, capacity, battery
ID,andbattery status.
Gas Gauge IC for
High Discharge Rates2/96 E
Pin Connections Pin NamesMODE Display mode output
SEG1 LED segment 1
SEG2 LED segment 2
SEG3 LED segment 3
SEG4 LED segment 4
SEG5 LED segment 5
PFC Programmed full count
selection input
REF Voltage reference output 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 Negative battery terminal
