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Fast charge of nickel cadmium
or nickel-metal hydride batter-
ies
Direct LED output displays
charge status
Fast-charge termination by -鈭哣,
maximum voltage, maximum
temperature, and maximum
time
Internal band-gap voltage ref-
erence
Optional top-off charge
Selectable pulse trickle charge
rates
Low-power mode
8-pin 300-mil DIP or 150-mil
SOIC
General Description
The bq2002 and bq2002/F Fast-Charge
ICs are low-cost CMOS battery-charge
controllers providing reliable charge
termination for both NiCd and NiMH
battery applications. Controlling a
current-limited or constant-current
supply allows the bq2002/F to be the
basis for a cost-effective stand-alone or
system-integrated charger. The
bq2002/F integrates fast charge with
optional top-off and pulsed-trickle con-
trol in a single IC for charging one or
more NiCd or NiMH battery cells.
Fast charge is initiated on application
of the charging supply or battery re-
placement. For safety, fast charge is
inhibited if the battery temperature
and voltage are outside configured
limits.
Fast charge is terminated by any of
the following:
n
n
n
n
n
Peak voltage detection (PVD)
Negative delta voltage (-鈭哣)
Maximum voltage
Maximum temperature
Maximum time
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After fast charge, the bq2002/F op-
tionally tops-off and pulse-trickles the
battery per the pre-configured limits.
Fast charge may be inhibited using
the INH pin. The bq2002/F may also
be placed in low-standby-power mode
to reduce system power consumption.
T h e bq 20 02 F d if f e rs f r om t h e
bq2002 only in that a slightly differ-
ent set of fast-charge and top-off
time limits is available. All differ-
ences between the two ICs are illus-
trated in Table 1.
Pin Connections
TM
LED
BAT
VSS
1
2
3
4
8
7
6
5
CC
Pin Names
TM
LED
INH
VCC
TS
Timer mode select input
Charging status output
Battery voltage input
System ground
TS
V
CC
INH
CC
Temperature sense input
Supply voltage input
Charge inhibit input
Charge control output
BAT
V
SS
8-Pin DIP or
Narrow SOIC
PN-200201.eps
bq2002/F Selection Guide
Part No.
bq2002
TCO
0.5
鈭?/div>
V
CC
HTF
None
LTF
None
-鈭哣 PVD
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Fast Charge
C/2
1C
2C
C/2
1C
2C
t
MTO
160
80
40
160
100
55
Top-Off
C/32
C/16
None
C/32
C/16
None
Maintenance
C/64
C/64
C/32
C/64
C/64
C/32
bq2002F 0.5
鈭?/div>
V
CC
None
None
SLUS131鈥揓ANUARY 1999 D
1
BQ2002FSN相關(guān)型號PDF文件下載
-
型號
版本
描述
廠商
下載
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