MAX8731 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8731 Datasheet PDF : 32 Pages
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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 = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
ERROR AMPLIFIERS
GMV Amplifier Transconductance ChargingVoltage() = 16.8V, VFBS_ = 16.8V
GMI Amplifier Transconductance ChargingCurrent() = 3968mA, VCSIP - VCSIN = 39.68mV
GMS Amplifier Transconductance InputCurrent() = 3968mA, VCSSP - VCSSN = 79.36mV
CCI/CCS/CCV Clamp Voltage
0.25V < VCCI/S/V < 2.0V
LOGIC LEVELS
SDA/SCL Input Low Voltage
VDD = 2.7V to 5.5V
SDA/SCL Input High Voltage
SDA/SCL Input Bias Current
VDD = 2.7V to 5.5V
VDD = 2.7V to 5.5V
BATSEL Input Low Voltage
BATSEL Input High Voltage
BATSEL Input Bias Current
SDA, Output Sink Current
V(SDA) = 0.4V
SMBus TIMING SPECIFICATIONS (VDD = 2.7V to 5.5V) (see Figures 4 and 5)
PARAMETERS
SYMBOL
CONDITIONS
SMBus Frequency
fSMB
Bus Free Time
tBUF
Start Condition Hold Time from
SCL
tHD:STA
MIN TYP MAX UNITS
0.0625
0.5
0.5
120
0.125
1
1
250
0.2500
2.0
2.0
600
mA/V
mA/V
mA/V
mV
0.8
V
2.1
V
-1
+1
µA
0.8
V
2.1
V
-1
+1
µA
6
mA
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
175
210
s
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