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BQ2003PN Datasheet(PDF) 7 Page - Texas Instruments

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Part No. BQ2003PN
Description  Fast-Charge IC
Download  15 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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BQ2003PN Datasheet(HTML) 7 Page - Texas Instruments

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7
bq2003
Battery
Temperature?
Discharge-Before-Charge
Commanced?
Trickle
CHG =
1 3/8s high
1/8s low
CHG =
1 3/8s low
1/8s high
Fast
CHG =
Low
Charge
Pending
Battery Voltage?
New Charge Cycle Start or
Discharge-Before-Charge
Command
VEDV < VCELL < VMCV
and
VHTF < VTEMP < VLTF
VHTF < VTEMP < VLTF
Trickle
CHG =
High
VEDV < VCELL < VMCV
Top-off
CHG =
1/8s low
1/8s high
VTEMP > VLTF or
VTEMP < VHTF
VCELL< VEDF
- V or
T/ t or
VTEMP< VTCO
or
Maximum
Time Out
Discharge
Top-off
selected?
Yes
Yes
No
Trickle
CHG =
1/8s low
1/8s high
Fast
CHG =
High
Hold-off
period
expired?
No
No
Trickle
CHG =
High
Hold-off
period
expires
t > 1.5tMCV
VCELL
> VMCV
VCELL
> VMCV
VCELL
> VMCV
VCELL
>
VCELL
VMCV
>
VCELL
VMCV
<
VEDV
VCELL >
VMCV
VCELL <
VMCV
Charge
Complete
Battery
Absent
or Maximum
Time Out
VTEMP < VTCO
SD2003.eps
VCELL <
VMCV
Figure 3. State Diagram


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