MAX8731A Maxim Integrated Products, MAX8731A Datasheet - Page 9

• Manufacturer Part Number: MAX8731A
• Description: SMBus Level 2 Battery Charger
• Manufacturer: Maxim Integrated Products

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ELECTRICAL CHARACTERISTICS (continued)
(V
C
per Figure 1; T
Note 1: Devices participating in a transfer time out when any clock low exceeds the 25ms minimum timeout period. Devices that
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
SMB TIMING SPECIFICATION (V
SMBus Frequency
Bus Free Time
START Condition Hold Time from
SCL
START Condition Setup Time
from SCL
STOP Condition Setup Time from
SCL
SDA Hold Time from SCL
SDA Setup Time from SCL
SCL Low Timeout
SCL Low Period
SCL High Period
Maximum Charging Period
Without a ChargeVoltage() or
ChargeCurrent() Command
LDO
DCIN
= 1µF, V
= V
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).
PARAMETERS
LX
= V
A
CC
= -40°C to +85°C, unless otherwise noted.) (Note 2)
CSSP
= LDO, C
_______________________________________________________________________________________
= V
CSSN
REF
= 19V, V
= 1µF, C
SMBus Level 2 Battery Charger
DD
SYMBOL
t
= 2.7V to 5.5V) (see Figures 4 and 5)
t
TIMEOUT
t
t
t
t
HD:DAT
HD:STA
SU:STO
SU:DAT
SU:STA
T
T
f
t
SMB
HIGH
BUF
LOW
BST
DAC
- V
= 0.1µF , V
LX
(Note 1)
= 4.5V, V
DD
FBSA
= 3.3V, ACIN = 2.5V; pins CCI, CCV, and CCS are compensated
CONDITIONS
= V
FBSB
with Remote Sense
= V
CSIP
= V
CSIN
= 16.8V, BATSEL = GND = PGND = 0,
MIN
300
250
140
4.7
4.7
4.7
10
25
4
4
4
TYP
MAX
100
210
35
UNITS
kHz
ms
µs
µs
µs
µs
ns
ns
µs
µs
s
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