Datasheet

bq24072T
bq24075T, bq24079T
www.ti.com SLUS937A –DECEMBER 2009–REVISED APRIL 2010
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range (0°C < T
J
< 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Deglitch time, supplement mode short
t
DGL(SC2)
250 ms
circuit
Recovery time, supplement mode short
t
REC(SC2)
60 ms
circuit
BATTERY CHARGER
Source current for BAT pin short-circuit
I
BAT(SC)
4 7.5 11 mA
detection
V
BAT(SC)
BAT pin short-circuit detection threshold 1.6 1.8 2.0 V
bq24072T, bq24075T 4.16 4.20 4.24
V
BAT(REG)
Battery charge voltage V
bq24079T 4.059 4.100 4.141
Pre-charge to fast-charge transition
V
LOWV
2.9 3 3.1 V
threshold
t
DGL1(LOW
Deglitch time on pre-charge to
25 ms
V)
fast-charge transition
t
DGL2(LOW
Deglitch time on fast-charge to
25 ms
V)
pre-charge transition
V
BAT(REG)
> V
BAT
> V
LOWV
, V
IN
= 5V, CE = LO, EN1= LO, EN2 =
I
CHG
Battery fast charge current range 300 1500 mA
HI
CE = LO, EN1= LO, EN2 = HI, V
BAT
> V
LOWV
,
I
CHG
Battery fast charge current V
IN
= 5V, I
IN-MAX
> I
CHG
, no load on OUT pin, thermal loop not K
ISET
/R
ISET
A
active, DPM loop not active
K
ISET
Fast charge current factor 797 890 975 AΩ
I
PRECHG
Pre-charge current K
PRECHG
/R
ISET
A
k
PRECHG
Pre-charge current factor 70 88 106
CE = LO, (EN1,EN2)≠(LO,LO),
0.09×I
CH
0.1×I
CH
0.11×I
CH
V
BAT
> V
RCH
, t < t
MAXCH
, V
IN
= 5V, DPM loop not active, thermal
G G G
loop not active
Charge current value for termination
I
TERM
detection threshold
CE = LO, (EN1,EN2)=(LO,LO),
0.027×I
C
.033×I
C
0.040×I
C
V
BAT
> V
RCH
, t < t
MAXCH
, V
IN
= 5V, DPM loop not active, thermal
HG HG HG
loop not active
t
DGL(TERM
Deglitch time, termination detected 25 ms
)
V
O(REG)
V
O(REG)
V
O(REG)
V
RCH
Recharge detection threshold –100m V
–140mV –60mV
V
Deglitch time, recharge threshold
t
DGL(RCH)
62.5 ms
detected
t
DGL(NO-
Delay time, input power loss to charger VBAT = 3.6V. Time measured from V
IN
:
20 ms
IN)
turn-off 5V → 3.3V 1ms fall-time
I
BAT(DET)
Sink current for battery detection 5 7.5 10 mA
t
DET
Battery detection timer 250 ms
BATTERY CHARGING TIMERS
t
PRECHG
Pre-charge safety timer value TMR = floating 1440 1800 2160 s
t
MAXCH
Charge safety timer value TMR = floating 14400 18000 21600 s
Pre-charge safety timer value(externally
t
PRECHG
18kΩ < RTMR < 72kΩ R
TMR
x K
TMR
s
set)
Charge safety timer value (externally
t
MAXCH
18kΩ < RTMR < 72kΩ 10 x R
TMR
x K
TMR
s
set)
K
TMR
Timer factor 35 45 55 s / kΩ
BATTERY – PACK NTC MONITOR
% of
V
HOT
High temperature trip point Battery charging 12 12.5 13
V
IN
% of
V
HYS(HOT)
Hysteresis on high trip point Battery charging 1
V
IN
% of
V
COLD
Low temperature trip point Battery charging 24.5 25 25.5
V
IN
V
HYS(COL
% of
Hysteresis on low trip point Battery charging 1
D)
V
IN
Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): bq24072T bq24075T bq24079T