Texas Instruments Evaluation Module for Lead Acid, switchmode BQ2031 DV2031S2 DV2031S2 数据表
产品代码
DV2031S2
3
DV2031S2
Rev. B Board
JP1
JP3
Fast Charge
Termination
Maintenance
L H or L Two-Step Voltage I
MIN
or MTO Constant voltage at
V
FLT
H
L
Two-Step Current
V
BLK
or
∆
2
V or MTO
Fixed-pulse current at
I
COND
H
H
Pulsed Current
V
BLK
(see Note)
Fast-charge rate
when V
BLK
≤
V
FLT
Note: Fast-charge termination by MTO is a fault.
Table 2. Charge Algorithms
Mode
Charge Action State
LED
1
LED
2
LED
3
L
Battery absent or over-voltage fault
Low
Low
High
Pre-charge qualification
Flash
Low
Low
Fast charging
High
Low
Low
Maintenance charging
Low
High
Low
Charge pending (temperature out of range)
X
X
Flash
Charging fault
X
X
High
H
Battery absent or over-voltage fault
Low
Low
High
Pre-charge qualification
High
High
Low
Fast charge
Low
High
Low
Maintenance charging
High
Low
Low
Charge pending (temperature out of range)
X
X
Flash
Charging fault
X
X
High
None
Battery absent or over-voltage fault
Low
Low
High
Pre-charge qualification
Flash
Flash
Low
Fast charge: current regulation
Low
High
Low
Fast charge: voltage regulation
High
High
Low
Maintenance charging
High
Low
Low
Charge pending (temperature out of range)
X
X
Flash
Charging fault
X
X
High
Notes:
1 = V
CC
; 0 = V
SS
; X = LED state when fault occurred; Flash =
1
6
s low,
1
6
s high.
In the Pulsed Current algorithm, the bq2031 annunciates maintenance when charging current is off and
fast charge whenever charging current is on.
Table 1. bq2031 LED Display Output Summary