Datasheet

bq24050
bq24052
bq24055
SLUS940B –SEPTEMBER 2009–REVISED JUNE 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range 0°C ≤ T
J
≤ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
QUIESCENT CURRENT
I
OUT(PDWN)
Battery current into OUT pin V
IN
= 0V 1
μA
I
OUT(DONE)
OUT pin current, charging terminated V
IN
= 6V, V
OUT
> V
OUT(REG)
6
I
IN(STDBY)
Standby current into IN pin TS = LO, V
IN
≤ 6V 125 μA
TS = open, V
IN
= 6V, TTDM – no load on OUT pin,
I
CC
Active supply current, IN pin 0.8 1 mA
V
OUT
> V
OUT(REG)
, IC enabled
BATTERY CHARGER FAST-CHARGE
V
OUT(REG)
Battery regulation voltage V
IN
=5.5V, I
OUT
=25mA, V
TS-45°C
≤ V
TS
≤ V
TS-0°C
4.16 4.20 4.23 V
V
O_HT(REG)
Battery hot regulation Voltage V
IN
=5.5V, I
OUT
=25mA, V
TS-60°C
≤ V
TS
≤ V
TS-45°C
4.02 4.06 4.1 V
Programmed Output “fast charge” V
OUT(REG)
> V
OUT
> V
LOWV
, V
IN
= 5V, ISET2=Lo,
I
OUT(RANGE)
10 800 mA
current range R
ISET
= 675 to 10.8kΩ
Adjust VIN down until I
OUT
= 0.5A, V
OUT
= 4.15V,
V
DO(IN-OUT)
Drop-Out, VIN – VOUT R
ISET
= 675 , ISET2=Lo (Adaptor Mode); Tj ≤ 325 500 mV
100°C
I
OUT
Output “fast charge” formula V
OUT(REG)
> V
OUT
> V
LOWV
, V
IN
= 5V, ISET2=Lo K
ISET
/R
ISET
A
R
ISET
= K
ISET
/I
OUT
50 < I
OUT
< 800 mA 510 540 570
K
ISET
Fast charge current factor R
ISET
= K
ISET
/I
OUT
25 < I
OUT
< 50 mA 480 527 600 AΩ
R
ISET
= K
ISET
/I
OUT
10 < I
OUT
< 25 mA 350 520 680
PRECHARGE – SET BY PRETERM PIN
Pre-charge to fast-charge transition
V
LOWV
2.4 2.5 2.6 V
threshold
Deglitch time on pre-charge to fast-
t
DGL1(LOWV)
70 μs
charge transition
Deglitch time on fast-charge to pre-
t
DGL2(LOWV)
32 ms
charge transition
I
PRE-TERM
Refer to the Termination Section
Pre-Charge Current Level, Default V
OUT
< V
LOWV
; R
PRE-TERM
= High Z (≥13kΩ); R
ISET
18 20 22 %I
OUT-CC
Setting = 1k
%
PRECHG
Pre-charge current formula R
PRE-TERM
= K
PRE-CHG
(Ω/%) × %
PRE-CHG
(%) R
PRE-TERM
/K
PRE-CHG
V
OUT
< V
LOWV
, V
IN
= 5V, R
PRE-TERM
= 2k to 10kΩ;
R
ISET
= 1080Ω , R
PRE-TERM
= K
PRE-CHG
× %I
FAST-
90 100 110 Ω/%
CHG
, where %I
FAST-CHG
is 20 to 100%
K
PRE-CHG
% Pre-charge Factor
V
OUT
< V
LOWV
, V
IN
= 5V, R
PRE-TERM
= 1k to 2kΩ;
R
ISET
= 1080Ω, R
PRE-TERM
= K
PRE-CHG
× %I
FAST-CHG
, 84 100 117 Ω/%
where %I
FAST-CHG
is 10% to 20%
TERMINATION – SET BY PRE-TERM PIN
Termination Current Threshold, V
OUT
> V
RCH
; R
PRE-TERM
= High Z (≥13kΩ); R
ISET
=
9 10 11 %I
OUT-CC
Default Setting 1k
%
TERM
Termination Current Threshold
R
PRE-TERM
= K
TERM
(Ω/%) × %TERM (%) R
PRE-TERM
/ K
TERM
Formula
V
OUT
> V
RCH
, V
IN
= 5V, R
PRE-TERM
= 2k to 10kΩ ;
R
ISET
= 750Ω; K
TERM
× %I
FAST-CHG
, where %I
FAST-
182 200 216
CHG
is 10 to 50%
K
TERM
% Term Factor Ω/%
V
OUT
> V
RCH
, V
IN
= 5V, R
PRE-TERM
= 1k to 2kΩ ;
R
ISET
= 750Ω; K
TERM
× %I
FAST-CHG
, where %I
FAST-
174 199 224
CHG
is 5 to 10%
Current for programming the term.
I
PRE-TERM
and pre-chg with resistor. I
Term-Start
is R
PRE-TERM
= 2k, V
OUT
= 4.15V 71 75 81 μA
the initial PRE-TERM curent.
%TERM Termination current formula R
TERM
/ K
TERM
%
t
DGL(TERM)
Deglitch time, termination detected 29 ms
Elevated PRE-TERM current for, t
Term-
I
Term-Start Start
, during start of charge to prevent 80 85 92 μA
recharge of full battery,
Elevated termination threshold initially
t
Term-Start
1.25 min
active for t
Term-Start
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