MAX1647 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – Chemistry-Independent Battery Chargers

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
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