Data Sheet

bq24072 , bq24073 , bq24074 , bq24075 , bq24079
www.ti.com SLUS810K –SEPTEMBER 2008–REVISED MARCH 2015
Electrical Characteristics (continued)
Over junction temperature range (0° ≤ T
J
≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
BATTERY CHARGER
I
BAT
Source current for BAT pin short-circuit detection V
BAT
= 1.5 V 4 7.5 11 mA
V
BAT(SC)
BAT pin short-circuit detection threshold V
BAT
rising 1.6 1.8 2 V
('72, '73, '74, '75) 4.16 4.20 4.23
V
BAT(REG)
Battery charge voltage V
('79) 4.059 4.100 4.141
V
LOWV
Pre-charge to fast-charge transition threshold V
IN
> V
UVLO
and V
IN
> V
BAT
+ V
IN(DT)
2.9 3 3.1 V
t
DGL1(LOWV)
Deglitch time on pre-charge to fast-charge transition 25 ms
t
DGL2(LOWV)
Deglitch time on fast-charge to pre-charge transition 25 ms
V
BAT(REG)
> V
BAT
> V
LOWV
, V
IN
= 5 V CE = LO,
Battery fast charge current range 100 1500 mA
EN1 = LO, EN2 = HI
I
CHG
CE = LO, EN1= LO, EN2 = HI,
Battery fast charge current V
BAT
> V
LOWV
, V
IN
= 5 V, I
IN
max > I
CHG
, no load on OUT pin, K
ISET
/R
ISET
A
thermal loop and DPPM 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 AΩ
CE = LO, (EN1, EN2) ≠ (LO, LO),
0.09×I
CHG
0.1×I
CHG
0.11×I
CHG
V
BAT
> V
RCH
, t < t
MAXCH
, V
IN
= 5 V, DPPM loop and thermal
loop not active
Termination comparator detection threshold
I
TERM
A
(internally set)
CE = LO, (EN1, EN2) = (LO, LO),
0.027×I
CHG
0.033×I
CHG
0.040×I
CHG
V
BAT
> V
RCH
, t < t
MAXCH
, V
IN
= 5 V, DPPM loop and thermal
loop not active
I
BIAS(ITERM)
Current for external termination-setting resistor V
IN
> V
UVLO
and V
IN
> V
BAT
+ V
IN(DT)
72 75 78 μA
Termination current threshold (externally set)
I
TERM
K
ITERM
× R
ITERM
/ R
ISET
A
(bq24074)
USB500 or ISET mode(EN1, EN2) ≠ (LO, LO)
0.0225 0.0300 0.0375
CE = LO, V
BAT
> V
RCH
, t < t
MAXCH
, V
IN
= 5 V, DPPM loop and
thermal loop not active
K Factor for termination detection threshold
K
ITERM
A
(externally set) (bq24074)
USB100 mode (EN1, EN2) = (LO, LO),
0.008 0.0100 0.012
CE = LO, V
BAT
> V
RCH
, t < t
MAXCH
, V
IN
= 5 V, DPPM loop and
thermal loop not active
t
DGL(TERM)
Deglitch time, termination detected 25 ms
V
BAT(REG)
V
BAT(REG)
V
BAT(REG)
V
RCH
Recharge detection threshold V
IN
> V
UVLO
and V
IN
> V
BAT
+ V
IN(DT)
V
–140mV –100mV –60mV
t
DGL(RCH)
Deglitch time, recharge threshold detected 62.5 ms
V
BAT
= 3.6 V. Time measured from
t
DGL(NO-IN)
Delay time, input power loss to OUT LDO turn-off 20 ms
V
IN
: 5 V → 3 V 1 μs fall-time
I
BAT(DET)
Sink current for battery detection V
BAT
= 2.5 V 5 7.5 10 mA
t
DET
Battery detection timer BAT high or low 250 ms
BATTERY CHARGING TIMERS
t
PRECHG
Pre-charge safety timer value TMR = floating 1440 1800 2160 s
t
MAXCHG
Charge safety timer value TMR = floating 14400 18000 21600 s
t
PRECHG
Pre-charge safety timer value 18 kΩ < R
TMR
< 72 kΩ R
TMR
× K
TMR
s
t
MAXCHG
Charge safety timer value 18 kΩ < R
TMR
< 72 kΩ 10×R
TMR
×K
TMR
s
K
TMR
Timer factor 36 48 60 s/kΩ
BATTERY-PACK NTC MONITOR
(1)
I
NTC
NTC bias current V
IN
> UVLO and V
IN
> V
BAT
+ V
IN(DT)
72 75 78 μA
V
HOT
High temperature trip point Battery charging, V
TS
Falling 270 300 330 mV
V
HYS(HOT)
Hysteresis on high trip point Battery charging, V
TS
Rising from V
HOT
30 mV
V
COLD
Low temperature trip point Battery charging, V
TS
Rising 2000 2100 2200 mV
V
HYS(COLD)
Hysteresis on low trip point Battery charging, V
TS
Falling from V
COLD
300 mV
t
DGL(TS)
Deglitch time, pack temperature fault detection TS fault detected to charger disable 50 ms
V
DIS(TS)
TS function disable threshold (bq24072, bq24073) TS unconnected V
IN
- 200mV V
THERMAL REGULATION
T
J(REG)
Temperature regulation limit 125 °C
T
J(OFF)
Thermal shutdown temperature T
J
Rising 155 °C
T
J(OFF-HYS)
Thermal shutdown hysteresis 20 °C
(1) These numbers set trip points of 0°C and 50°C while charging, with 3°C hysteresis on the trip points, with a Vishay Type 2 curve NTC
with an R25 of 10 kΩ.
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