MAX8731 查看數據表（PDF） - Maxim Integrated

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MAX8731

SMBus Level 2 Battery Charger with Remote Sense

Maxim Integrated 

SMBus Level 2 Battery Charger with

Remote Sense

ELECTRICAL CHARACTERISTICS (continued)

(VDCIN = VLX = VCSSP = VCSSN = 19V, VBST - VLX = 4.5V, VFBSA = VFBSB = VCSIP = VCSIN = 16.8V, BATSEL = GND = PGND = 0,

CLDO = 1µF, VCC = LDO, CREF = 1µF, CDAC = 0.1µF , VDD = 3.3V, ACIN = 2.5V; pins CCI, CCV, and CCS are compensated

per Figure 1; TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

SMB TIMING SPECIFICATION (VDD = 2.7V to 5.5V) (see Figures 4 and 5)

PARAMETERS

SYMBOL

CONDITIONS

SMBus Frequency

Bus Free Time

fSMB

tBUF

Start Condition Hold Time from

SCL

tHD:STA

MIN TYP MAX UNITS

10

100

kHz

4.7

µs

4

µs

Start Condition Setup Time from

SCL

tSU:STA

4.7

µs

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

tSU:STO

tHD:DAT

tSU:DAT

tTIMEOUT

TLOW

THIGH

(Note 1)

4

µs

300

ns

250

ns

25

35

ms

4.7

µs

4

µs

140

210

s

Note 1: 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).

Note 2: Specifications to -40°C are guaranteed by design, not production tested.

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