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MAX1667EAP+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
General Description
The MAX1667 provides the power control necessary to
charge batteries of any chemistry. All charging functions
are controlled through 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 MAX1667 functions as a Level 2
charger, compliant with the Duracell/Intel Smart Battery
Charger Specification.
In addition to the feature set required for a Level 2 charg-
er, the MAX1667 generates interrupts to signal the host
when power is applied to the charger or when 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 (Li+) batteries have completed the charge with-
out interrogating the battery.
The MAX1667 is available in a 20-pin SSOP with a 2mm
profile height.
________________________Applications
Notebook Computers Charger Base Stations
Personal Digital Assistants Phones
____________________________Features
♦ Charges Any Battery Chemistry: Li+, NiCd,
NiMH, Lead Acid, etc.
♦ SMBus 2-Wire Serial Interface
♦ Compliant with Duracell/Intel Smart Battery
Charger Specification Rev. 1.0
♦ 4A, 3A, or 1A (max) Battery Charge Current
♦ 5-Bit Control of Charge Current
♦ Up to 18.4V Battery Voltage
♦ 11-Bit Control of Voltage
♦ ±1% Voltage Accuracy
♦ Up to +28V Input Voltage
♦ Battery Thermistor Fail-Safe Protection
♦ Greater than 95% Efficiency
♦ Synchronous Rectifier
MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
________________________________________________________________ Maxim Integrated Products 1
Typical Operating Circuit
PART
MAX1667EAP -40°C to +85°C
TEMP RANGE PIN-PACKAGE
20 SSOP
Ordering Information
SMBus is a trademark of Intel Corp.
19-1488; Rev 1; 5/03
MAX1667
DCIN
REF BST
DHI
LX
DLO
PGND
INT
CS
BATT
SCL
SDA
THM
IOUT
VL
CHARGE SOURCE
AGND
SEL
DACV
CCV
CCI
V
DD
HOST
CONTROLLER
SMART
BATTERY
SCL
SDA
INT
GND
BATT+
R
SENSE
SCL
SDA
TEMP
BATT-
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DCIN
= 18V, internal reference, 1µF capacitor at REF, 1µF capacitor at VL, T
A
= 0°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C, unless otherwise noted.)
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.
DCIN to AGND .......................................................-0.3V to +30V
BST to AGND..........................................................-0.3V to +36V
BST, DHI to LX..........................................................-0.3V to +6V
LX, IOUT 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 ............................-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 (T
A
= +70°C)
SSOP (derate 8mW/°C above +70°C) ..........................640mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
%
-0.8 0.8
ChargingVoltage()
= 0x3130 (12,592mV)
and
0x41A0 (16,800mV)
Voltage Accuracy
mV5ChargingCurrent() = 0x0080 (128mA)
CS to BATT Single-Count
Current-Sense Voltage
V019BATT, CS Input Voltage Range
µA
350 500VL > 5.15V, V
BATT
= 12V
BATT Input Current (Note 1)
15VL < 3.2V, V
BATT
= 12V
Ω58High or lowDLO On-Resistance
Ω47High or lowDHI On-Resistance
mA467.5V < V
DCIN
< 28V, logic inputs = VLDCIN Quiescent Current
V7.5 28DCIN Input Voltage Range
%96.5 97.7In dropoutDHI Maximum Duty Cycle
kHz200 250 300Not in dropoutOscillator Frequency
V5.15 5.4 5.657.5V < V
DCIN
< 28V, no loadVL Output Voltage
mV100I
LOAD
= 0 to 10mAVL Load Regulation
V3.20 4 5.15VL AC_PRESENT Trip Point
4.055 4.096 4.137
UNITSMIN TYP MAXCONDITIONSPARAMETER
µA
170 400VL > 5.15V, V
CS
= 12V
CS Input Current (Note 1)
15VL < 3.2V, V
CS
= 12V
mV145 160 175
SEL = VL (4A),
ChargingCurrent() = 0x0F80 (3968mA)
CS to BATT Full-Scale
Current-Sense Voltage
V0 < I
SOURCE
< 500µAREF Output Voltage
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-1.0 1.0
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-3.0 3.0
-1.0 1.0
ChargingVoltage()
= 0x1060 (4192mV)
and
0x20D0 (8400mV)
SWITCHING REGULATOR
SUPPLY AND REFERENCE
MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= 18V, internal reference, 1µF capacitor at REF, 1µF capacitor at VL, T
A
= 0°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C, unless otherwise noted.)
Note 1: When DCIN is less than 4V, VL is less than 3.2V, causing the battery current to be typically 2µA (CS plus BATT input
current).
Bits11Guaranteed monotonicVDAC Voltage-Setting DAC Resolution
Bits5Guaranteed monotonicCDAC Current-Setting DAC Resolution
mA5
mA579
% of
V
REF
3 4.5 6THM falling
THM THERMISTOR_UR
Underrange Trip Point
% of
V
REF
22 23.5 25THM falling
THM THERMISTOR_HOT
Trip Point
% of
V
REF
74 75.5 77THM falling
THM THERMISTOR_COLD
Trip Point
mA/V0.2GMI Amplifier Transconductance
mA/V1.4GMV Amplifier Transconductance
% of
V
REF
89 91 93THM falling
THM THERMISTOR_OR
Overrange Trip Point
% of
V
DCIN
93 95 97BATT risingBATT POWER_FAIL Threshold
µA±80
GMV Amplifier Maximum
Output Current
µA±200
GMI Amplifier Maximum
Output Current
mV25 80 2001.1V < V
CCI
< 3.5V
CCV Clamp Voltage with
Respect to CCI
UNITSMIN TYP MAXCONDITIONSPARAMETER
mA6V
SDA
= 0.6VSDA Output Low Sink Current
µA-1 1SDA, SCL Input Bias Current
V2.2SDA, SCL Input Voltage High
V0.8SDA, SCL Input Voltage Low
mV25 80 2001.1V < V
CCV
< 3.5V
CCI Clamp Voltage with
Respect to CCV
ChargingCurrent() = 0x0000 10 µA
ChargingCurrent() = 0x0001
to 0x007F (127mA)
V
IOUT
= 17V, ChargingCurrent() = 0x0001
to 0x007F (127mA)
V
DCIN
= 0, V
IOUT
= 20V µA10IOUT Leakage Current
V
IOUT
= 0
IOUT Output Current
% of
V
DCIN
0.5
THM THERMISTOR_OR, _COLD,
_HOT, _UR Trip Point Hysteresis
% of
V
DCIN
1
BATT POWER_FAIL Threshold
Hysteresis
ERROR AMPLIFIERS
TRIP POINTS AND LINEAR CURRENT SOURCES
CURRENT- AND VOLTAGE-SETTING DACs
LOGIC LEVELS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

MAX1667EAP+T

Mfr. #:
Buy MAX1667EAP+T
Manufacturer:
Maxim Integrated
Description:
Battery Management Level 2 Smart Battery Charger
Lifecycle:
New from this manufacturer.
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