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| BQ24735 Datasheet, PDF (10/42 Pages) Texas Instruments – 1-4 Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode with N-Channel Power MOSFET Selector | |||
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bq24735
SLUSAK9 â SEPTEMBER 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
4.5 V ⤠VVCC ⤠24 V, 0°C ⤠TJ ⤠125°C, typical values are at TA = 25°C, with respect to GND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
HOST COMMUNICATION FAILURE
ttimeout
SMBus bus release timeout(3)
tBOOT
Deglitch for watchdog reset signal
Watchdog timeout period, ChargeOption() bit [14:13] = 01(4)
tWDI
Watchdog timeout period, ChargeOption() bit [14:13] = 10(4)
Watchdog timeout period, ChargeOption() bit [14:13] = 11(4) (Default)
25
35
10
35
44
53
70
88
105
140
175
210
UNIT
ms
ms
s
s
s
(3) Devices participating in a transfer will timeout when any clock low exceeds the 25ms minimum timeout period. Devices that have
detected a timeout condition must reset the communication no later than the 35ms maximum timeout period. Both a master and a slave
must adhere to the maximum value specified as it incorporates the cumulative stretch limit for both a master (10ms) and a slave (25ms).
(4) User can adjust threshold via SMBus ChargeOption() REG0x12.
Figure 4. SMBus Communication Timing Waveforms
10
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