Datasheet

bq24050
bq24052
bq24055
www.ti.com SLUS940B –SEPTEMBER 2009–REVISED JUNE 2012
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
RECHARGE OR REFRESH
Recharge detection threshold – V
O(REG)
- V
O(REG
- V
O(REG)
-
V
IN
= 5V, V
TS
= 0.5V, V
OUT
: 4.25V → V
RCH
V
Normal Temp 0.120 0.095 0.070
V
RCH
Recharge detection threshold – Hot V
O_HT(REG)
V
O_HT(REG)
V
O_HT(REG)
V
IN
= 5V, V
TS
= 0.2V, V
OUT
: 4.15V → V
RCH
V
Temp -0.130 -0.105 -0.080
Deglitch time, recharge threshold V
IN
= 5V, V
TS
= 0.5V, V
OUT
: 4.25V → 3.5V in 1μs;
t
DGL1(RCH)
29 ms
detected t
DGL1(RCH)
is time to ISET ramp
Deglitch time, recharge threshold V
IN
= 5V, V
TS
= 0.5V, V
OUT
= 3.5V inserted;
t
DGL2(RCH)
3.6 ms
detected in OUT-Detect Mode t
DGL2(RCH)
is time to ISET ramp
BATTERY DETECT ROUTINE (NOTE: In Hot Mode V
O(REG)
becomes V
O_HT(REG)
)
VOUT Reduced regulation during V
O(REG)
- V
O(REG
- V
O(REG)
-
V
REG-BD
V
battery detect 0.450 0.400 0.350
I
BD-SINK
Sink current during V
REG-BD
V
IN
= 5V, V
TS
= 0.5V, Battery Absent 7 10 mA
t
DGL(HI/LOW
Regulation time at V
REG
or V
REG-BD
25 ms
REG)
V
O(REG)
- V
O(REG)
- V
O(REG)
-
V
BD-HI
High battery detection threshold V
IN
= 5V, V
TS
= 0.5V, Battery Absent V
0.150 0.100 0.050
V
REG-BD
V
REG-BD
V
REG-BD
V
BD-LO
Low battery detection threshold V
IN
= 5V, V
TS
= 0.5V, Battery Absent V
+0.050 +0.100 +0.150
BATTERY CHARGING TIMERS AND FAULT TIMERS
Restarts when entering Pre-charge; Always
t
PRECHG
Pre-charge safety timer value 1700 1940 2250 s
enabled when in pre-charge.
Clears fault or resets at UVLO, TS ("CE") disable,
t
MAXCH
Charge safety timer value 34000 38800 45000 s
OUT Short, exiting LOWV and Refresh
BATTERY-PACK NTC MONITOR (Note 1); TS pin: bq24050/5: 10k NTC; bq24052: 100k NTC; See TS section for thermistor information
NTC bias current; 10k NTC
I
NTC-10k
V
TS
= 0.3V 48 50 52 μA
thermsistor, bq24050/5
NTC bias current; 100k NTC
I
NTC-100k
V
TS
= 0.3V 4.8 5 5.2 μA
thermsistor, bq24052
bq24050/5 bias current when
I
NTC-DIS-10k
V
TS
= 0V 27 30 34 μA
Charging is disabled.
bq24052 bias current when Charging
I
NTC-DIS-100k
V
TS
= 0V 4.4 5 5.8 μA
is disabled.
INTC is reduced prior to entering
I
NTC-FLDBK-10k
TTDM to keep cold thermistor from V
TS
: Set to 1.525V 4 5 6.5 μA
entering TTDM, bq24050/5
INTC is reduced prior to entering
I
NTC-FLDBK-100k
TTDM to keep cold thermistor from V
TS
: Set to 1.525V 1.1 1.5 1.9 μA
entering TTDM, bq24052
Termination and timer disable mode
V
TTDM(TS)
V
TS
: 0.5V → 1.7V; Timer Held in Reset 1550 1600 1650 mV
Threshold – Enter
V
HYS-TTDM(TS)
Hysteresis exiting TTDM V
TS
: 1.7V → 0.5V; Timer Enabled 100 mV
V
CLAMP(TS)
TS maximum voltage clamp V
TS
= Open (Float) 1800 1950 2000 mV
Deglitch exit TTDM between states 57 ms
t
DGL(TTDM)
Deglitch enter TTDM between states 8 μs
INTC adjustment (90 to 10%; 45 to 6.6uA) takes
TS voltage where INTC is reduce to
V
TS_I-FLDBK
place near this spec threshold. 1475 mV
keep thermistor from entering TTDM
V
TS
: 1.425V → 1.525V
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