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MAX8731AETI+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
MAX8731A
SMBus Level 2 Battery Charger
with Remote Sense
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= V
LX
= V
CSSP
= V
CSSN
= 19V, V
BST
- V
LX
= 4.5V, V
FBSA
= V
FBSB
= V
CSIP
= V
CSIN
= 16.8V, BATSEL = GND = PGND = 0,
C
LDO
= 1µF, V
CC
= LDO, C
REF
= 1µF, C
DAC
= 0.1µF , V
DD
= 3.3V, ACIN = 2.5V; pins CCI, CCV, and CCS are compensated per
Figure 1; T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER CONDITIONS
MIN
TYP
MAX
UNITS
INPUT-CURRENT REGULATION
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
V
FBS_
= 19V
103.3
116.6
mV
RS1, Figure 1 = 10mΩ;
InputCurrent() = 11004mA or 3584mA
-6 +6
Input Current Accuracy
RS1, Figure 1 = 10mΩ;
InputCurrent() = 2048mA
-5 +5
%
Input Current-Limit Gain Error Based on InputCurrent() = 1024mA and 11004mA -5 +5 %
Input Current-Limit Offset Based on InputCurrent() = 1024mA and 11004mA -1 +1 mV
CSSP/CSSN Input Voltage Range
8 26 V
IINP Transconductance V
CSSP - CSSN
= 110mV 2.7 3.3
mA/V
IINP Offset Based on V
CSSP - CSSN
= 110mV and 20mV
-1.5
+1.5
mV
V
CSSP - CSSN
= 110mV -5 +5
V
CSSP - CSSN
= 55mV or 35mV -4 +4 IINP Accuracy
V
CSSP - CSSN
= 20mV -10
+10
%
IINP Output Voltage Range 0 3.5 V
SUPPLY AND LINEAR REGULATOR
DCIN, Input Voltage Range 8.0
26.0
V
DCIN falling 7
DCIN Undervoltage-Lockout
Trip Point
DCIN rising
7.85
—
V
CSSP
- V
CSIN
falling 9 21
POWER_FAIL Threshold
V
CSSP
- V
CSIN
rising
160
271
mV
LDO Output Voltage 8.0V < V
DCIN
< 28V, no load
5.25
5.55
V
LDO Load Regulation 0 < I
LDO
< 30mA
100
mV
LDO Undervoltage-Lockout
Threshold
V
DCIN
= 8.0V, V
LDO
falling
3.20
5.15
V
V
DD
Range 2.7 5.5 V
V
DD
UVLO Rising 2.7 V
V
DD
Quiescent Current DCIN < 6V, V
DD
= 5.5V, SCL = SDA = 5.5V 27 µA
REFERENCE
REF Output Voltage 0 < I
REF
< 500µA
4.053
4.139
V
REF Undervoltage-Lockout
Trip Point
REF falling 3.9 V
ACOK
ACOK Sink Current V
ACOK
= 0.4V, ACIN = 1.5V 1 mA
MAX8731A
SMBus Level 2 Battery Charger
with Remote Sense
8 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= V
LX
= V
CSSP
= V
CSSN
= 19V, V
BST
- V
LX
= 4.5V, V
FBSA
= V
FBSB
= V
CSIP
= V
CSIN
= 16.8V, BATSEL = GND = PGND = 0,
C
LDO
= 1µF, V
CC
= LDO, C
REF
= 1µF, C
DAC
= 0.1µF , V
DD
= 3.3V, ACIN = 2.5V; pins CCI, CCV, and CCS are compensated per
Figure 1; T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
ACIN
ACIN Threshold
2.007
2.089
V
ACIN Threshold Hysteresis 10 30 mV
REMOTE-SENSE INPUTS
FBS_ Range V
CSIN
- V
FBS
0
200
mV
FBS_ Gain ΔV
CSIN
/ Δ(V
CSIN
- V
FBS_
) 0.9 1.1 V/V
CSIN-FBS_ Clamp Voltage
220
280
mV
FBS_ Bias Current Charger switching, FBS_ selected 14 µA
SWITCHING REGULATOR
V
CSIN
= 16.0V, V
CSSP
= 19V
360
440
Off-Time
V
CSIN
= 16.0V, V
CSSP
= 17V
260
350
ns
BST Supply Current DHI high
800
µA
DHI On-Resistance Low I
DHI
= -10mA 3 Ω
DHI On-Resistance High I
DHI
= 10mA 5 Ω
DLO On-Resistance High I
DLO
= 10mA 5 Ω
DLO On-Resistance Low I
DLO
= -10mA 3 Ω
ERROR AMPLIFIERS
GMV Amplifier Transconductance
C har g i ng V ol tag e( ) = 16.8V , V
FBS_
= 16.8V
0.0625
0.2500
mA/V
GMI Amplifier Transconductance
ChargingCurrent() = 3968mA, V
CSIP
- V
CSIN
= 39.68mV 0.5 2.0
mA/V
GMS Amplifier Transconductance
InputCurrent() = 3968mA, V
CSSP
- V
CSSN
= 79.36mV 0.5 2.0
mA/V
CCI/CCS/CCV Clamp Voltage 0.25V < V
CCI/S/V
< 2.0V
150
600
mV
LOGIC LEVELS
SDA/SCL Input Low Voltage V
DD
= 2.7V to 5.5V 0.8 V
SDA/SCL Input High Voltage V
DD
= 2.7V to 5.5V 2.3 V
BATSEL Input Low Voltage 0.8 V
BATSEL Input High Voltage 2.3 V
SDA, Output Sink Current V
(SDA)
= 0.4V 6 mA
MAX8731A
SMBus Level 2 Battery Charger
with Remote Sense
_______________________________________________________________________________________ 9
ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= V
LX
= V
CSSP
= V
CSSN
= 19V, V
BST
- V
LX
= 4.5V, V
FBSA
= V
FBSB
= V
CSIP
= V
CSIN
= 16.8V, BATSEL = GND = PGND = 0,
C
LDO
= 1µF, V
CC
= LDO, C
REF
= 1µF, C
DAC
= 0.1µF , V
DD
= 3.3V, ACIN = 2.5V; pins CCI, CCV, and CCS are compensated
per Figure 1; T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
SMB TIMING SPECIFICATION (V
DD
= 2.7V to 5.5V) (see Figures 4 and 5)
PARAMETERS
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
SMBus Frequency f
SMB
10
100
kHz
Bus Free Time t
BUF
4.7 µs
START Condition Hold Time from
SCL
t
HD:STA
4 µs
START Condition Setup Time
from SCL
t
SU:STA
4.7 µs
STOP Condition Setup Time from
SCL
t
SU:STO
4 µs
SDA Hold Time from SCL
t
HD:DAT
300
ns
SDA Setup Time from SCL
t
SU:DAT
250
ns
SCL Low Timeout
t
TIMEOUT
(Note 1) 25 35 ms
SCL Low Period T
LOW
4.7 µs
SCL High Period T
HIGH
4 µs
Maximum Charging Period
Without a ChargeVoltage() or
ChargeCurrent() Command
140 210
s
Note 1: Devices participating in a transfer time out 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.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

MAX8731AETI+

Mfr. #:
Buy MAX8731AETI+
Manufacturer:
Maxim Integrated
Description:
Battery Management SMBus Level 2 Battery Charger
Lifecycle:
New from this manufacturer.
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