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| BQ24040_16 Datasheet, PDF (9/38 Pages) Texas Instruments – Single Cell Li-Ion and Li-Pol Battery Charger With Auto Start | |||
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www.ti.com
bq24040, bq24041, bq24045
SLUS941F â SEPTEMBER 2009 â REVISED MARCH 2015
7.6 Timing Requirements
INPUT
tDGL(PG_PWR)
tDGL(PG_NO-
PWR)
tDGL(OVP-SET)
tDGL(OVP-REC)
Deglitch time on exiting sleep.
Deglitch time on VHYS-INDT power down.
Same as entering sleep.
Input over-voltage blanking time
Deglitch time exiting OVP
Time measured from VIN: 0V â 5V 1μs rise-time to
PG = low, VOUT = 3.6V
Time measured from VIN: 5V â 3.2V 1μs fall-time to
PG = OC, VOUT = 3.6V
VIN: 5V â 12V
Time measured from VIN: 12V â 5V 1μs fall-time to
PG = LO
ISET SHORT CIRCUIT TEST
tDGL_SHORT
Deglitch time transition from ISET short to Clear fault by disconnecting IN or cycling (high / low)
IOUT disable
TS/BAT_EN
PRECHARGE â SET BY PRETERM PIN: bq24040 / bq24045; Internally Set: bq24041
tDGL1(LOWV)
Deglitch time on pre-charge to fast-charge
transition
tDGL2(LOWV)
Deglitch time on fast-charge to pre-charge
transition
TERMINATION â SET BY PRE-TERM PIN: bq24040 / bq24045
tDGL(TERM)
Deglitch time, termination detected
tTerm-Start
Elevated termination threshold initially
active for tTerm-Start
RECHARGE OR REFRESH â bq24040 / bq24045
tDGL1(RCH)
tDGL2(RCH)
Deglitch time, recharge threshold detected
Deglitch time, recharge threshold detected
in OUT-Detect Mode
VIN = 5V, VTS = 0.5V, VOUT: 4.25V â 3.5V in 1μs;
tDGL(RCH) is time to ISET ramp
VIN = 5V, VTS = 0.5V, VOUT = 3.5V inserted; tDGL(RCH)
is time to ISET ramp
BATTERY DETECT ROUTINE â bq24040 / bq24045 (NOTE: In Hot mode VO(REG) becomes VO_HT(REG))
tDGL(HI/LOW
REG)
Regulation time at VREG or VREG-BD
BATTERY CHARGING TIMERS AND FAULT TIMERS: bq24040 and bq24045 only
tPRECHG
Pre-charge safety timer value
Restarts when entering Pre-charge; Always enabled
when in pre-charge.
tMAXCH
Charge safety timer value
Clears fault or resets at UVLO, TS/BAT_EN disable,
OUT Short, exiting LOWV and Refresh
BATTERY-PACK NTC MONITOR; TS Terminal: bq24040 / bq24045: 10k NTC
tDGL(TTDM)
Deglitch exit TTDM between states
Deglitch enter TTDM between states
tDGL(TS_10C)
tDGL(TS)
Deglitch for TS thresholds: 10C.
Deglitch for TS thresholds: 0/45/60C.
Normal to Cold Operation; VTS: 0.6V â 1V
Cold to Normal Operation; VTS: 1V â 0.6V
Battery charging
MIN
TYP
MAX UNIT
45
μs
29
ms
113
μs
30
μs
1
ms
70
μs
32
ms
29
ms
1.25
min
29
ms
3.6
ms
25
ms
1700
1940
2250
s
34000 38800 45000
s
57
ms
8
μs
50
ms
12
ms
30
ms
Copyright © 2009â2015, Texas Instruments Incorporated
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Product Folder Links: bq24040 bq24041 bq24045
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