BQ2014HSN ,NiCd/NiMH Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED DriversGeneral Descriptionnal processor (common ground). TheAccurate measurement of avail The bq2014H NiCd ..
BQ2014HSN ,NiCd/NiMH Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED DriversGeneral Descriptionnal processor (common ground). TheAccurate measurement of avail The bq2014H NiCd ..
BQ2014HSNTR ,NiCd/NiMH Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED DriversGeneral Descriptionnal processor (common ground). TheAccurate measurement of avail The bq2014H NiCd ..
BQ2014HSNTRG4 ,NiCd/NiMH Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED Drivers 16-SOIC 0 to 70 bq2014HLow-Cost NiCd/NiMH Gas Gauge ICbidirectional serial link to an exter-
BQ2014SN , Gas Gauge IC with External Charge Control
BQ2014SN , Gas Gauge IC with External Charge Control
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 ..
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BUF04GS ,Closed-Loop High Speed BufferCHARACTERISTICSGain A R = 2 kΩ 0.995 0.9985 1.005 V/VVCL L–40°C ≤ T ≤ +85°C 0.995 0.9980 1.005 V/VA ..
BUF05703PW ,4 Channel LCD Gamma Correction Buffer +VcomFEATURES DESCRIPTION23• Gamma Correction Channels: 6, 4The BUFxx703 are a series of multi-channel b ..
BQ2014H-BQ2014HSN-BQ2014HSNTR-BQ2014HSNTRG4
NiCd/NiMH Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED Drivers
Features Accurate measurement of avail-
able capacity in NiCd or NiMH
batteries Low-cost battery management so-
lution for pack integration
As little as square inch of
PCB for complete circuit
Lowoperating current (120µA
typical)
Less than 100nA of data
retention current High-speed (5kb/s) single-wire
communication interface (HDQ
bus) for critical battery
parameters Communication with an external
charge controller such as the
bq2004 Direct driveof remaining capacity
LEDs Automatic rate and temperature
compensationof measurements 16-pin narrow SOIC
General DescriptionThe bq2014H NiCd/NiMH Gas
GaugeICis intended for 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. The bq2014H
also supportsa simple single-line
bidirectional serial linktoan exter-
nal processor (common ground). The
5kb/s HDQ bus interface reduces
communications overheadin the
external microcontroller.
Internal registers include available
capacity and energy, temperature,
voltage and current, and battery
status. The external processor may
also overwrite someof the bq2014H
gas gauge data registers.
The bq2014H 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.
bq2014HLCOM 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
DONE Charge complete
input
VSS System ground Sense resistor input
DISP Display control input Battery sense input
RBI Register backup input
HDQ Serial communications
input/output No connect
REF Voltagereference output
VCC Supply voltage
Pin ConnectionsSLUS030A–JUNE 1999 - REVISED OCTOBER 2003
Low-Cost NiCd/NiMH Gas Gauge IC
Pin Names
