BQ24040 Datasheet, PDF (5/31 Pages) Texas Instruments – 800mA Single-Input Single Cell Li-Ion Battery Charger With Auto Start

bq24040
bq24041
www.ti.com.................................................................................................................................... SLUS941A – 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
%TERM
t_DGL(TERM)
I_Term-Start
Termination current formula
Deglitch time, termination detected
Elevated PRE-TERM current for,
t_Term-Start, during start of charge to
prevent recharge of full battery,
R_TERM/ K_TERM
29
80
85
92
t_Term-Start
Elevated termination threshold initially
active for t_Term-Start
RECHARGE OR REFRESH – bq24040
1.25
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(REG)–0.095
V_{O_HT(REG)}
–0.130
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_DGL(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_DGL(RCH) is time to ISET ramp
BATTERY DETECT ROUTINE – bq24040 (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)-
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
25
V_O(REG)
-0.150
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
+0.50
V_REG-BD +0.1
V_REG-BD
+0.15
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/BAT_EN
disable, OUT Short, exiting LOWV and Refresh
34000
38800
45000
BATTERY-PACK NTC MONITOR (Note 1); TS pin: bq24040: 10k NTC
I_NTC-10k
I_NTC-DIS-10k
NTC bias current
10k NTC bias current when Charging
is disabled.
V_TS = 0.3V
V_TS = 0V
48
50
52
27
30
34
I_{NTC-FLDBK-10k}
INTC is reduced prior to entering
TTDM to keep cold thermistor from
entering TTDM
V_TS: Set to 1.525V
4
5
6.5
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}
C_TS
V_TS-0°C
V_HYS-0°C
V_TS-10°C
V_HYS-10°C
V_TS-45°C
TS voltage where INTC is reduce to
keep thermistor from entering TTDM
Optional Capacitance – ESD
Low temperature CHG Pending
Hysteresis at 0°C
Low temperature, half charge
Hysteresis at 10°C
High temperature at 4.1V
INTC adjustment (90 to 10%; 45 to 6.6uS) takes
place near this spec threshold.
V_TS: 1.425V → 1.525V
Low Temp Charging to Pending;
V_TS: 1V → 1.5V
Charge pending to low temp charging;
V_TS: 1.5V → 1V
Normal charging to low temp charging;
V_TS: 0.5V → 1V
Low temp charging to normal CHG;
V_TS: 1V → 0.5V
Normal charging to high temp CHG;
V_TS: 0.5V → 0.2V
1205
765
263
1475
0.22
1230
86
790
35
278
1255
815
293
UNIT
%
ms
μA
min
V
V
ms
ms
V
mA
ms
V
V
s
s
μA
μA
μA
mV
mV
mV
ms
μs
mV
μF
mV
mV
mV
mV
mV
Copyright © 2009, Texas Instruments Incorporated
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