MAX8731 Maxim Integrated Products, MAX8731 Datasheet - Page 2

• Manufacturer Part Number: MAX8731
• Description: SMBus Level 2 Battery Charger
• Manufacturer: Maxim Integrated Products

ABSOLUTE MAXIMUM RATINGS
DCIN, CSSN, CSIN, FBSA, FBSB to GND..............-0.3V to +28V
CSSP to CSSN, CSIP to CSIN, PGND to GND ......-0.3V to +0.3V
BST to GND ............................................................-0.3V to +32V
BST to LX..................................................................-0.3V to +6V
DHI to LX.................................................-0.3V to +(V
DLO to PGND..........................................-0.3V to +(LDO + 0.3)V
LX to GND .................................................................-6V to +28V
CCI, CCS, CCV, DAC, REF,
SMBus Level 2 Battery Charger with
Remote Sense
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
C
Figure 1; T
2
CHARGE-VOLTAGE REGULATION
Battery Full-Charge Voltage and
Accuracy
Battery Undervoltage-Lockout
Trip Point for Trickle Charge
CHARGE-CURRENT REGULATION
CSIP to CSIN Full-Scale Current-
Sense Voltage
Charge Current and Accuracy
Charge-Current Gain Error
FBSA/FBSB/CSIP/CSIN
Input Voltage Range
IINP to GND...........................................-0.3V to (V
LDO
DCIN
_______________________________________________________________________________________
= 1µF, V
= V
A
PARAMETER
LX
= 0°C to +85°C, unless otherwise noted. Typical values are at T
= V
CC
CSSP
= LDO, C
= V
CSSN
REF
= 19V, V
= 1µF, C
ChargingVoltage() = 0x41A0
ChargingVoltage() = 0x3130
ChargingVoltage() = 0x20D0
ChargingVoltage() = 0x1060
RS2 (Figure 1) = 10mΩ;
ChargingCurrent() = 0x1f80
RS2 (Figure 1) = 10mΩ;
ChargingCurrent() = 0x0f80
RS2 (Figure 1) = 10mΩ;
ChargingCurrent() = 0x0080 (128mA)
Based on ChargeCurrent() = 128mA and 8.064A
BST
DAC
- V
= 0.1µF, V
LX
VCC
BST
= 4.5V, V
+ 0.3)V
+ 0.3)V
DD
CONDITIONS
FBSA
= 3.3V, ACIN = 2.5V; pins CCI, CCV, and CCS are compensated per
= V
V
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
FBSB
DD
LDO to PGND ......................................................-0.3V to +6V
28-Pin Thin QFN
(derate 20.8mW/°C above +70°C) ........................1666.7 mW
, SCL, SDA, BATSEL, ACIN, ACOK, V
= V
A
= +25°C.)
CSIP
= V
CSIN
= 16.8V, BATSEL = GND = PGND = 0,
16.716
12.491
8.333
78.22
7.822
3.809
MIN
4.15
-0.5
-0.8
-0.8
-1.0
64
-3
-4
-2
0
A
= +70°C)
12.592
4.192
80.64
8.064
3.968
TYP
16.8
8.4
2.5
CC
to GND,
16.884
12.693
8.467
4.234
83.06
8.306
4.126
MAX
+0.5
+0.8
+0.8
+1.0
400
+3
+4
+2
19
UNITS
mV
mA
%
%
%
%
%
%
%
V
V
V
V
V
A
A
V