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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1647 Datasheet

Chemistry-Independent Battery Chargers

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19-1158; Rev 0; 12/96
Chemistry-Independent
Battery Chargers
_______________General Description
The MAX1647/MAX1648 provide the power control neces-
sary to charge batteries of any chemistry. In the MAX1647,
all charging functions are controlled via the Intel System
Management Bus (SMBus™) interface. The SMBus 2-wire
serial interface sets the charge voltage and current, and
provides thermal status information. The MAX1647 func-
tions as a level 2 charger, compliant with the Duracell/Intel
Smart Battery Charger Specification. The MAX1648 omits
the SMBus serial interface, and instead sets the charge
voltage and current proportional to the voltage applied to
external control pins.
In addition to the feature set required for a level 2 charger,
the MAX1647 generates interrupts to signal the host when
power is applied to the charger or a battery is installed or
removed. Additional status bits allow the host to check
whether the charger has enough input voltage, and
whether the voltage on or current into the battery is being
regulated. This allows the host to determine when lithium-
ion batteries have completed charge without interrogating
the battery.
The MAX1647 is available in a 20-pin SSOP with a 2mm
profile height. The MAX1648 is available in a 16-pin SO
package.
________________________Applications
Notebook Computers
Personal Digital Assistants
Charger Base Stations
Phones
____________________________Features
o Charges Any Battery Chemistry:
Li-Ion, NiCd, NiMH, Lead Acid, etc.
o Intel SMBus 2-Wire Serial Interface (MAX1647)
o Intel/Duracell Level 2 Smart Battery Compliant
(MAX1647)
o 4A, 2A, or 1A Maximum Battery-Charge Current
o 11-Bit Control of Charge Current
o Up to 18V Battery Voltage
o 10-Bit Control of Voltage
o ±0.75% Voltage Accuracy with External ±0.1%
Reference
o Up to 28V Input Voltage
o Battery Thermistor Fail-Safe Protection
______________Ordering Information
PART
MAX1647EAP
MAX1648ESE
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 SSOP
16 Narrow SO
__________________________________________________________Pin Configurations
TOP VIEW
IOUT 1
DCIN 2
VL 3
CCV 4
CCI 5
SEL 6
CS 7
BATT 8
REF 9
AGND 10
MAX1647
20 BST
19 LX
18 DHI
17 DLO
16 PGND
15 DACV
14 SDA
13 SCL
12 THM
11 INT
DCIN 1
VL 2
CCV 3
CCI 4
CS 5
BATT 6
REF 7
AGND 8
MAX1648
SO
16 BST
15 LX
14 DHI
13 DLO
12 PGND
11 SETV
10 SETI
9 THM
SMBus is a trademark of Intel Corp.
SSOP
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1647 Datasheet

Chemistry-Independent Battery Chargers

No Preview Available !

Chemistry-Independent
Battery Chargers
ABSOLUTE MAXIMUM RATINGS
DCIN to AGND..........................................................-0.3V to 30V
DCIN to IOUT...........................................................-0.3V to 7.5V
BST to AGND ............................................................-0.3V to 36V
BST, DHI to LX ............................................................-0.3V to 6V
LX to AGND ..............................................................-0.3V to 30V
THM, CCI, CCV, DACV, REF,
DLO to AGND ................................................-0.3V to (VL + 0.3V)
VL, SEL, INT, SDA, SCL to AGND (MAX1647) ...........-0.3V to 6V
SETV, SETI to AGND (MAX1648)................................-0.3V to 6V
BATT, CS+ to AGND.................................................-0.3V to 20V
PGND to AGND .....................................................-0.3V to +0.3V
SDA, INT Current ................................................................50mA
VL Current ...........................................................................50mA
Continuous Power Dissipation (TA = +70°C)
16-Pin SO (derate 8.7mW/°C above +70°C).................696mW
20-Pin SSOP (derate 8mW/°C above +70°C) ...............640mW
Operating Temperature Range
MAX1647EAP, MAX1648ESE ...........................-40°C to +85°C
Storage Temperature.........................................-60°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
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
(VDCIN = 18V, VREF = 4.096V, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
SUPPLY AND REFERENCE
DCIN Input Voltage Range
DCIN Quiescent Current
VL Output Voltage
VL Load Regulation
VL AC_PRESENT Trip Point
REF Output Voltage
REF Overdrive Input Current
SWITCHING REGULATOR
Oscillator Frequency
DHI Maximum Duty Cycle
DHI On-Resistance
DLO On-Resistance
BATT Input Current (Note 1)
CS Input Current (Note 1)
BATT, CS Input Voltage Range
CS to BATT Single-Count
Current-Sense Voltage
CS to BATT Full-Scale
Current-Sense Voltage
Voltage Accuracy
CONDITIONS
7.5V < VDCIN < 28V, logic inputs = VL
7.5V < VDCIN < 28V, no load
ILOAD = 10mA
MAX1647
0µA < ISOURCE < 500µA
High or low
High or low
VL < 3.2V, VBATT = 12V
VL < 5.15V, VBATT = 12V
VL < 3.2V, VCS = 12V
VL < 5.15V, VCS = 12V
MAX1647, SEL = open,
ChargingCurrent( ) = 0x0020
MAX1647, SEL = open,
ChargingCurrent( ) = 0x07F0;
MAX1648, VSETI = 1.024V
MAX1647, ChargingVoltage( ) = 0x1060,
ChargingVoltage( ) = 0x3130; MAX1648,
VSETV = 3.15V, VSETV = 1.05V
MIN TYP
7.5
4
5.15 5.4
3.20 4
3.74 3.9
200 250
89 93
4
6
1
350
1
170
0
2.94
170 185
-0.65
MAX UNITS
28 V
6 mA
5.65 V
100 mV
5.15 V
4.07 V
700 µA
300 kHz
%
7
14
5
µA
500
5
µA
400
19 V
mV
200 mV
0.65 %
2 _______________________________________________________________________________________


Part Number MAX1647
Description Chemistry-Independent Battery Chargers
Maker Maxim
Total Page 24 Pages
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