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BQ2003PN Datasheet(PDF) 1 Page - Texas Instruments

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Part No. BQ2003PN
Description  Fast-Charge IC
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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BQ2003PN Datasheet(HTML) 1 Page - Texas Instruments

 
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1
Features
Fast charge and conditioning of
nickel cadmium or nickel-metal
hydride batteries
Hysteretic PWM switch-mode
current regulation or gated con-
trol of an external regulator
Easily integrated into systems
or used as a stand-alone charger
Pre-charge qualification of tem-
perature and voltage
Direct LED outputs display
battery and charge status
Fast-charge termination by
∆ temperature/∆ time, -∆V, maxi-
mum voltage, maximum tem-
perature, and maximum time
Optional top-off charge
General Description
The bq2003 Fast Charge IC provides
comprehensive fast charge control
functions together with high-speed
switching power control circuitry on a
monolithic CMOS device.
Integration of closed-loop current
control circuitry allows the bq2003
to be the basis of a cost-effective so-
lution for stand-alone and system-
integrated chargers for batteries of
one or more cells.
Switch-activated discharge-before-
charge allows bq2003-based chargers
to support battery conditioning and
capacity determination.
High-efficiency power conversion is
accomplished using the bq2003 as a
hysteretic PWM controller for
switch-mode regulation of the charg-
ing current. The bq2003 may alterna-
tively be used to gate an externally
regulated charging current.
Fast charge may begin on applica-
tion of the charging supply, replace-
ment of the battery, or switch de-
pression. For safety, fast charge is
inhibited unless/until the battery
temperature and voltage are within
configured limits.
Temperature, voltage, and time are
monitored throughout fast charge.
Fast charge is terminated by any of
the following:
n Rate of temperature rise
(
∆T/∆t)
n Negative delta voltage (-
∆V)
n Maximum voltage
n Maximum temperature
n Maximum time
After fast charge, an optional top-off
phase is available.
Constant-cur-
rent maintenence charge is provided
by an external trickle resistor.
Fast-Charge IC
bq2003
CCMD
Charge command/select
DCMD
Discharge command
DVEN
-
∆V enable/disable
TM
1
Timer mode select 1
TM
2
Timer mode select 2
TS
Temperature sense
BAT
Battery voltage
VSS
System ground
1
PN200301.eps
16-Pin DIP or SOIC
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
DIS
MOD
CHG
TEMP
MCV
TCO
SNS
CCMD
DCMD
DVEN
TM1
TM2
TS
BAT
VSS
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 Names
SLUS095A - OCTOBER 1999 I


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