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BQ2000TPN Datasheet

  • BQ2000TPN

  • Programmable Multi-Chemistry Fast-Charge Management IC

  • 16頁

  • TI

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bq2000T
Programmable Multi-Chemistry
Fast-Charge Management IC
Features
鉃?/div>
S af e m an ag em e nt o f fa s t
charge for NiCd, NiMH, or Li-
Ion battery packs
High-frequency switching con-
troller for efficient and simple
charger design
Pre-charge qualification for
detecting shorted, damaged, or
overheated cells
Fast-charge termination by
鈭員
/
鈭?/div>
t m i ni m um c ur r e n t
(Li-Ion), maximum tempera-
ture, and maximum charge
time
Selectable top-off mode for
achieving maximum capacity in
NiMH batteries
Programmable trickle-charge
mode for reviving deeply dis-
charged batteries and for post-
charge maintenance
Built-in battery removal and
insertion detection
S l e e p m od e f o r l o w p o we r
consumption
General Description
The bq2000T is a programmable,
monolithic IC for fast-charge manage-
ment of nickel cadmium (NiCd),
nickel metal-hydride (NiMH), or lith-
ium-ion (Li-Ion) batteries in single- or
multi-chemistry applications. The
bq2000T detects the battery chemis-
try and proceeds with the optimal
charging and termination algorithms.
This process eliminates undesirable
undercharged or overcharged condi-
tions and allows accurate and safe
termination of fast charge.
Depending on the chemistry, the
bq2000T provides a number of
charge termination criteria:
n
鉃?/div>
鉃?/div>
For safety, the bq2000T inhibits fast
charge until the battery voltage and
temperature are within user-defined
limits. If the battery voltage is below
the low-voltage threshold, the
bq2000T uses trickle-charge to
condition the battery. For NiMH
batteries, the bq2000T provides an
optional top-off charge to maximize
the battery capacity.
The integrated high-frequency com-
parator allows the bq2000T to be the
basis for a complete, high-efficiency
power-conversion circuit for both
nickel-based and lithium-based
chemistries.
鉃?/div>
鉃?/div>
Rate of temperature rise,
鈭員/鈭唗
(for
NiCd and NiMH)
Minimum charging current (for
Li-Ion)
Maximum temperature
Maximum charge time
鉃?/div>
n
n
n
鉃?/div>
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Pin Connections
Pin Names
SNS
V
SS
Current-sense input
System ground
Charge-status
output
Battery-voltage
input
RC
V
CC
MOD
TS
Temperature-sense
input
Timer-program input
Supply-voltage input
Modulation-control
output
SNS
VSS
LED
BAT
1
2
3
4
8
7
6
5
MOD
VCC
LED
BAT
RC
TS
8-Pin DIP or Narrow SOIC
or TSSOP
PN-2000.eps
SLUS149A鈥揊EBRUARY 2000
1

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  • 英文版
    Programmable Multi-Chemistry Fast-Charge Management IC
    TI
  • 英文版
    Programmable Multi-Chemistry Fast-Charge Management IC
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