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Description:
PC87334VLJ  PC87334VJG  
BQ2004E Fast-Charge ICs
Prototype PCB
Part No.:   BQ2004E
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Description:   Fast-Charge ICs
File Size :   295 K    
Page : 19 Pages
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  BQ2004E Datasheet PDF page 4 BQ2004E Datasheet PDF page 5 BQ2004E Datasheet PDF page 6 BQ2004E Datasheet PDF page 7 BQ2004E Datasheet PDF page 9 BQ2004E Datasheet PDF page 10 BQ2004E Datasheet PDF page 11 BQ2004E Datasheet PDF page 12  
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bq2004E/H
New Charge Cycle Started by
Any One of:
VCC Rising to Valid Level
Battery Replacement
(VCELL Falling through VMCV)
Inhibit (INH) Released
VEDV < VCELL < VMCV
Yes
DCMD Tied to Ground?
No
VCELL < VEDV
Battery Voltage?
VCELL < VEDV
VCELL > VMCV
Falling Edge
on DCMD
Discharge-
Before-Charge
Charge
Pending
VTEMP > VLTF or
VTEMP < VHTF
Battery Temperature?
VHTF < VTEMP < VLTF
VCELL > VMCV
VCELL >
Top-Off and
VMCV
Pulse-Trickle
Charge
Battery
Absent
VEDV < VCELL < VMCV
and
VHTF < VTEMP < VLTF
Fast
Charge
VCELL
>
VMCV
- V or
T/ t or
VTEMP
<
VTCO
or
Maximum Time Out
Top-Off
Selected?
No
VCELL
>
VMCV
Top-Off
Charge
VTEMP < VTCO
or 0.235 Maximum
Time Out
Pulse
Trickle
Charge
VCELL
<
VMCV
t > t
MCV
Pulse
Trickle
Charge
VCELL
>
VMCV
Charge
Complete
Yes
Pulse
Trickle
Charge
SD2004EH.eps
Figure 3. Charge Algorithm State Diagram
8
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