BQ24050 Datasheet, PDF (5/37 Pages) Texas Instruments – 800mA Single Cell Li-Ion Battery Charger With Automatic Adaptor/USB Detection

bq24050
bq24052
bq24055
www.ti.com.................................................................................................................................... SLUS940A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009
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
RECHARGE OR REFRESH
V_RCH
Recharge detection threshold –
Normal Temp
Recharge detection threshold – Hot
Temp
V_IN = 5V, V_TS = 0.5V, V_OUT: 4.25V → V_RCH
V_IN = 5V, V_TS = 0.2V, V_OUT: 4.15V → V_RCH
V_O(REG)-
0.120
V_{O_HT(REG)}
-0.130
V_O(REG
-0.095
V_{O_HT(REG)}
-0.105
V_O(REG)-
0.070
V_{O_HT(REG)}
-0.080
t_DGL1(RCH)
Deglitch time, recharge threshold
detected
V_IN = 5V, V_TS = 0.5V, V_OUT: 4.25V → 3.5V in 1μs;
t_DGL1(RCH) is time to ISET ramp
t_DGL2(RCH)
Deglitch time, recharge threshold
detected in OUT-Detect Mode
V_IN = 5V, V_TS = 0.5V, V_OUT = 3.5V inserted;
t_DGL2(RCH) is time to ISET ramp
BATTERY DETECT ROUTINE (NOTE: In Hot Mode V_O(REG) becomes V_{O_HT(REG)})
V_REG-BD
VOUT Reduced regulation during
battery detect
29
3.6
V_O(REG)-
0.450
V_O(REG
-0.400
V_O(REG)-
0.350
I_BD-SINK
t_DGL(HI/LOW
REG)
V_BD-HI
Sink current during V_REG-BD
Regulation time at V_REG or V_REG-BD
High battery detection threshold
V_IN = 5V, V_TS = 0.5V, Battery Absent
V_IN = 5V, V_TS = 0.5V, Battery Absent
7
V_O(REG)-
0.150
25
V_O(REG)-
0.100
10
V_O(REG)-
0.050
V_BD-LO
Low battery detection threshold
V_IN = 5V, V_TS = 0.5V, Battery Absent
V_REG-BD
+0.050
V_REG-BD
+0.100
V_REG-BD
+0.150
BATTERY CHARGING TIMERS AND FAULT TIMERS
t_PRECHG
Pre-charge safety timer value
Restarts when entering Pre-charge; Always
enabled when in pre-charge.
1700
1940
2250
t_MAXCH
Charge safety timer value
Clears fault or resets at UVLO, TS ("CE") disable,
OUT Short, exiting LOWV and Refresh
34000
38800
45000
BATTERY-PACK NTC MONITOR (Note 1); TS pin: bq24050/5: 10k NTC; bq24052: 100k NTC; See TS section for thermistor information
I_NTC-10k
NTC bias current; 10k NTC
thermsistor, bq24050/5
V_TS = 0.3V
48
50
52
I_NTC-100k
NTC bias current; 100k NTC
thermsistor, bq24052
V_TS = 0.3V
4.8
5
5.2
I_NTC-DIS-10k
bq24050/5 bias current when
Charging is disabled.
V_TS = 0V
27
30
34
I_NTC-DIS-100k
bq24052 bias current when Charging
is disabled.
V_TS = 0V
4.4
5
5.8
I_{NTC-FLDBK-10k}
INTC is reduced prior to entering
TTDM to keep cold thermistor from
entering TTDM, bq24050/5
V_TS: Set to 1.525V
4
5
6.5
INTC is reduced prior to entering
I_{NTC-FLDBK-100k} TTDM to keep cold thermistor from
entering TTDM, bq24052
V_TS: Set to 1.525V
1.1
1.5
1.9
V_TTDM(TS)
Termination and timer disable mode
Threshold – Enter
V_TS: 0.5V → 1.7V; Timer Held in Reset
1550
1600
1650
V_HYS-TTDM(TS)
V_CLAMP(TS)
t_DGL(TTDM)
Hysteresis exiting TTDM
TS maximum voltage clamp
Deglitch exit TTDM between states
Deglitch enter TTDM between states
V_TS: 1.7V → 0.5V; Timer Enabled
V_TS= Open (Float)
1800
100
1950
57
8
2000
V_{TS_I-FLDBK}
TS voltage where INTC is reduce to
keep thermistor from entering TTDM
INTC adjustment (90 to 10%; 45 to 6.6uA) takes
place near this spec threshold.
V_TS: 1.425V → 1.525V
1475
UNIT
V
V
ms
ms
V
mA
ms
V
V
s
s
μA
μA
μA
μA
μA
μA
mV
mV
mV
ms
μs
mV
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