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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
4 _______________________________________________________________________________________
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
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER CONDITIONS
TYP
MAX
UNITS
LDO Output Voltage 8.0V < V
DCIN
< 28V, no load
5.25
5.4
5.55
V
LDO Load Regulation 0 < I
LDO
< 30mA 34
100
mV
LDO Undervoltage-Lockout Threshold
V
DCIN
= 8.0V, V
LDO
falling
3.20 4.00 5.15
V
V
DD
Range 2.7 5.5 V
V
DD
UVLO Rising 2.5 2.7 V
V
DD
UVLO Hysteresis 100 mV
V
DD
Quiescent Current DCIN < 6V, V
DD
= 5.5V, SCL = SDA = 5.5V 16 27 µA
REFERENCE
REF Output Voltage 0 < I
REF
< 500µA
4.071 4.096 4.120
V
REF Undervoltage-Lockout Trip Point REF falling 3.1 3.9 V
ACOK
ACOK Sink Current V
ACOK
= 0.4V, ACIN = 1.5V 1 mA
ACOK Leakage Current V
ACOK
= 5.5V, ACIN = 2.5V 1 µA
ACIN
ACIN Threshold
2.007 2.048 2.089
V
ACIN Threshold Hysteresis 10 20 30 mV
ACIN Input Bias Current -1 +1 µA
REMOTE-SENSE INPUTS
FBS_ Range V
CSIN
- V
FBS
0
200
mV
FBS_ Gain ΔV
CSIN
/ Δ(V
CSIN
- V
FBS_
)
0.95 1.00 1.05
V/V
CSIN-FBS_ Clamp Voltage
225
250
275
mV
FBS_ Bias Current Charger switching, FBS_ selected 14 µA
FBS_ Bias Current Charger not switching or FBS_ not selected -2 +2 µA
SWITCHING REGULATOR
V
CSIN
= 16.0V, V
CSSP
= 19V
360
400
440
Off-Time
V
CSIN
= 16.0V, V
CSSP
= 17V
260
300
360
ns
BST Supply Current DHI high 500
800
µA
LX Input Bias Current V
DCIN
= 28V, V
CSIN
=
V
LX
= 20V
,
DHI low
2 µA
Maximum Discontinuous-Mode Peak
Current (I
MIN
)
0.5
A
DHI On-Resistance Low I
DHI
= -10mA 1 3 Ω
DHI On-Resistance High I
DHI
= 10mA 3 5 Ω
DLO On-Resistance High I
DLO
= 10mA 3 5 Ω
DLO On-Resistance Low I
DLO
= -10mA 1 3 Ω
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
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
MAX8731A
SMBus Level 2 Battery Charger
with Remote Sense
_______________________________________________________________________________________ 5
PARAMETER CONDITIONS
TYP
MAX
UNITS
ERROR AMPLIFIERS
GMV Amplifier Transconductance
C har g i ng V ol tag e( ) = 16.8V , V
FBS_
= 16.8V
0.0625
0.125
0.2500
mA/V
GMI Amplifier Transconductance
ChargingCurrent() = 3968mA, V
CSIP
- V
CSIN
= 39.68mV
0.5
1.0
2.0
mA/V
GMS Amplifier Transconductance
InputCurrent() = 3968mA, V
CSSP
- V
CSSN
= 79.36mV
0.5
1.0
2.0
mA/V
CCI/CCS/CCV Clamp Voltage
0.25V < V
CCI/S/V
< 2.0V
120
250
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 2.1
V
SDA/SCL Input Bias Current V
DD
= 2.7V to 5.5V -1 +1
µA
BATSEL Input-Low_Voltage 0.8
V
BATSEL Input-High_Voltage 2.1
V
BATSEL Input Bias Current -1 +1
µA
SDA, Output Sink Current V
(SDA)
= 0.4V 6
mA
SMBus TIMING SPECIFICATIONS (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
175
210
s
MAX8731A
SMBus Level 2 Battery Charger
with Remote Sense
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(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
TYP
MAX
UNITS
CHARGE-VOLTAGE REGULATION
16.632
16.968
V
ChargingVoltage() = 0x41A0
-1 +1 %
12.466
12.717
V
ChargingVoltage() = 0x3130
-1 +1 %
8.316
8.484
V
ChargingVoltage() = 0x20D0
-1 +1 %
4.129
4.255
V
Battery Full-Charge Voltage and
Accuracy
ChargingVoltage() = 0x1060
-1.5
+1.5
%
CHARGE-CURRENT REGULATION
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
78.22
83.05
mV
7.822
8.305
A
RS2, Figure 1 = 10mΩ;
ChargingCurrent()= 0x1f80
-3 +3 %
3.809
4.126
A
RS2, Figure 1 = 10mΩ;
ChargingCurrent() = 0x0f80
-4 +4 %
Charge Current and Accuracy
RS2, Figure 1 =10mΩ;
ChargingCurrent() = 0x0080
30
400
mA
Charge-Current Gain Error Based on ChargeCurrent() = 128mA and 8.064A -2 +2 %
FBSA/FBSB/CSIP/CSIN Input-
Voltage Range
0 19 V
Adapter present, not charging, I
CSIP
+ I
CSIN
+ I
LX
+ I
FBS
,
V
FBS_
= V
LX
= V
CSIN
= V
CSIP
= 19V
5
Battery Quiescent Current
Adapter absent, I
CSIP
+ I
CSIN
+ I
LX
+ I
FBSA
+ I
FBSB
+
I
CSSP
+ I
CSSN
, V
FBS_
= V
LX
= V
CSIN
= V
CSIP
= 19V,
V
DCIN
= 0V
1
µA
V
A d a
p
t er
= 26V , V
B at te r
y
= 16.8V , not char g i ng
500
µA
Charging 1 mA
V
Adapter
= 19V,
V
Battery
= 16.8V
Not charging
500
µA
Charging 1 mA
Adapter Quiescent Current
I
DCIN
+
I
CSSP
+
I
CSSN
V
Adapter
= 8V,
V
Battery
= 4V
Not charging
500
µA
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.
Delivery:
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