BQ2003STR ,NiCd/NiMH Switchmode Charge Management IC W/Negative dV, dT/dt TerminationGeneral DescriptionFast charge may begin on applica-tion of the charging supply, replace-➤ Fast cha ..
BQ2003STRG4 ,Switch-mode NiCd/NiMH Battery Charger with Negative dV and dT/dt Termination 16-SOIC 0 to 70Functional Descriptionand RB2 is the resistor connected to the negative bat-tery terminal. See Figu ..
BQ2004 ,NiCd/NiMH Switchmode Charge Management IC W/Negative dV, Peak Voltage Detection, dT/dt TerminationGeneral Descriptionpression. For safety, fast charge isinhibited unless/until the battery➤ Fast cha ..
BQ2004E ,NiCd/NiMH Switchmode Charge Management IC W/Negative dV, Peak Voltage Detection, dT/dt TerminationGeneral Descriptionured limits.➤ Fast charge and conditioning of The bq2004E and bq2004H FastTemper ..
BQ2004EPN ,NiCd/NiMH Switchmode Charge Management IC W/Negative dV, Peak Voltage Detection, dT/dt Terminationblock diagram and Figure 3 shows aThe DCMD input is used to command discharge-before-state diagram ..
BQ2004EPN ,NiCd/NiMH Switchmode Charge Management IC W/Negative dV, Peak Voltage Detection, dT/dt TerminationGeneral Descriptionured limits.➤ Fast charge and conditioning of The bq2004E and bq2004H FastTemper ..
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BQ2003-BQ2003PN-BQ2003PN-N-BQ2003S-BQ2003SN-BQ2003S-N-BQ2003S-NTR-BQ2003S-NTRG4-BQ2003STR-BQ2003STRG4
NiCd/NiMH Switchmode Charge Management IC W/Negative dV, dT/dt Termination
Features Fast charge and conditioningof
nickel cadmiumor nickel-metal
hydride batteries Hysteretic PWM switch-mode
current regulationor gated con-
trolofan external regulator Easily integrated into systems usedas astand-alonecharger Pre-charge qualificationof tem-
peratureand voltage Direct LED outputs display
battery and chargestatus Fast-charge terminationby temperature/∆ time, -∆V, maxi-
mum voltage, maximum tem-
perature, and maximumtime Optional top-off charge
General DescriptionThe bq2003 Fast ChargeIC provides
comprehensive fast charge control
functions together with high-speed
switching power control circuitryona
monolithicCMOS device.
Integrationof closed-loop current
control circuitry allows the bq2003be the basisofa cost-effectiveso-
lution for stand-alone and system-
integrated chargersfor batteriesof
oneor more cells.
Switch-activated discharge-before-
charge allows bq2003-based chargers support battery conditioning and
capacity determination.
High-efficiency power conversionis
accomplished using the bq2003asa
hysteretic PWM controller for
switch-mode regulationof the charg-
ing current. The bq2003 may alterna-
tivelybe usedto gatean externally
regulatedcharging current.
Fast charge may beginon applica-
tionof the charging supply, replace-
mentof the battery,or switch de-
pression. For safety, fast chargeis
inhibited unless/until the battery
temperature and voltage are within
configured limits.
Temperature, voltage, and time are
monitored throughout fast charge.
Fast chargeis terminatedby anyof
the following:
Rate oftemperature rise
(∆T/∆t)
Negative deltavoltage (-∆V)
Maximum voltage
Maximum temperature
Maximum time
After fast charge,an optional top-off
phaseis available. Constant-cur-
rent maintenence chargeis providedan externaltrickle resistor.
Fast-Charge IC
bq2003CCMD Charge command/select
DCMD Discharge command
DVEN -∆V enable/disable
TM1 Timer mode select 1
TM2 Timer mode select 2 Temperature sense
BAT Battery voltage
VSS System ground
SNS Sense resistor input
TCO Temperature cutoff
MCV Maximum voltage
TEMP Temperature status
output
CHG Charging status output
MOD Charge current control
DIS Discharge control
VCC 5.0V ±10% power
Pin Connections Pin NamesSLUS095A - OCTOBER 1999 I
