19-1158; Rev 0; 12/96
Ch e m is t ry-In d e p e n d e n t
Ba t t e ry Ch a rg e rs
7/MAX1648
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
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.
♦ Charges Any Battery Chemistry:
Li-Ion, NiCd, NiMH, Lead Acid, etc.
♦ Intel SMBus 2-Wire Serial Interface (MAX1647)
♦ Intel/Duracell Level 2 Smart Battery Compliant
(MAX1647)
♦ 4A, 2A, or 1A Maximum Battery-Charge Current
♦ 11-Bit Control of Charge Current
♦ Up to 18V Battery Voltage
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.
♦ 10-Bit Control of Voltage
♦ ±0.75% Voltage Accuracy with External ±0.1%
Reference
♦ Up to 28V Input Voltage
♦ Battery Thermistor Fail-Safe Protection
The MAX1647 is available in a 20-pin SSOP with a 2mm
profile height. The MAX1648 is available in a 16-pin SO
package.
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 SSOP
________________________Ap p lic a t io n s
MAX1647EAP
MAX1648ESE
Notebook Computers
Personal Digital Assistants
Charger Base Stations
Phones
16 Narrow SO
__________________________________________________________P in Co n fig u ra t io n s
TOP VIEW
IOUT
DCIN
VL
1
2
3
4
5
6
7
8
9
20 BST
19 LX
18 DHI
DCIN
VL
1
2
3
4
5
6
7
8
16 BST
LX
15
CCV
CCI
DHI
14
13 DLO
CCV
CCI
17
DLO
16 PGND
MAX1648
MAX1647
CS
PGND
12
SEL
CS
15
14
13
DACV
SDA
SCL
11 SETV
BATT
REF
SETI
THM
10
9
BATT
REF
AGND
12 THM
11 INT
AGND 10
SO
SSOP
SMBus is a trademark of Intel Corp.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800