MAX1645EEI ,Advanced Chemistry-Independent / Level 2 Battery Chargers with Input Current LimitingELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V = +3.3V, V = +16.8V, V = +18V, T = 0°C to +85°C, ..
MAX1647EAP ,Chemistry-Independent Battery ChargersApplicationsMAX1647EAP -40°C to +85°C 20 SSOPNotebook ComputersMAX1648ESE -40°C to +85°C 16 Narrow ..
MAX1647EAP ,Chemistry-Independent Battery ChargersFeaturesThe MAX1647/MAX1648 provide the power control neces-' Charges Any Battery Chemistry: sary ..
MAX1647EAP+ ,Chemistry-Independent Battery ChargersApplicationsMAX1647EAP -40°C to +85°C 20 SSOPNotebook ComputersMAX1648ESE -40°C to +85°C 16 Narrow ..
MAX1648ESE ,Chemistry-Independent Battery ChargersELECTRICAL CHARACTERISTICS(V = 18V, V = 4.096V, T = 0°C to +85°C. Typical values are at T = +25°C, ..
MAX1649CPA ,5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC ControllersELECTRICAL CHARACTERISTICS(V+ = 5V, T = T to T , unless otherwise noted. Typical values are at T = ..
MAX4400AUK+T ,Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with Shutdownapplications.● 1.4mA of Sink and Source Load CurrentThe MAX4400 single amplifier is available in ul ..
MAX4400AUK-T ,Single/Dual/Quad / Low-Cost / Single-Supply / Rail-to-Rail Op Amps with ShutdownELECTRICAL CHARACTERISTICS (continued)(V = +5V, V = 0, V = 0, V = V /2, R = ∞ connected to V /2, SH ..
MAX4400AXK+T ,Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with ShutdownElectrical Characteristics (continued)(V = +5V, V = 0V, V = 0V, V = V /2, R = ∞ connected to V /2, ..
MAX4400AXK-T ,Single/Dual/Quad / Low-Cost / Single-Supply / Rail-to-Rail Op Amps with ShutdownELECTRICAL CHARACTERISTICS(V = +5V, V = 0, V = 0, V = V /2, R = ∞ connected to V /2, SHDN = V (MAX4 ..
MAX4400AXK-T ,Single/Dual/Quad / Low-Cost / Single-Supply / Rail-to-Rail Op Amps with ShutdownApplications*Future product—contact factory for availability.Single-Supply Zero-Crossing DetectorsI ..
MAX4401AXT ,Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with ShutdownElectrical Characteristics(V = +5V, V = 0V, V = 0V, V = V /2, R = ∞ connected to V /2, SHDN = V (MA ..
MAX1645EEI
Advanced Chemistry-Independent / Level 2 Battery Chargers with Input Current Limiting
19-15btr Rev (kr 10/99
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Advanced Chemistry-lndependent, Level 2
Battery Charger with Input Current Limiting
General Description
The MAX1645 is a high-efficiency battery charger
capable of charging batteries of any chemistry type. It
uses the Intel System Management Bus (SMBUSTM) to
control voltage and current charge outputs.
When charging lithium-ion (Li+) batteries, the MAX1645
automatically transitions from regulating current to reg-
ulating voltage The MAX1645 can also limit line input
current so as not to exceed a predetermined current
drawn from the DC source. A 175sec charge safety
timer prevents "runaway Charging” should the
MAX1645 stop receiving charging voltage/current com-
mands.
The MAX1645 employs a next-generation synchronous
buck control circuitry that lowers the minimum input-to-
output voltage drop by allowing the duty cycle to
exceed 99%, The MAX1645 can easily charge one to
four series Li+ cells,
F ea tures
t Input Current Limiting
O 175sec Charge Safety Timeout
t 128mA Wake-Up Charge
Charges Any Chemistry Battery:
Li+, NiCd, NiMH, Lead Acid, etc.
' Intel SMBus 2-Wire Serial Interface
0 Compliant with Level 2 Smart Battery Charger
Spec. Rev. 1.0
t +8V to +28V Input Voltage Range
t Up to 18.4V Battery Voltage
' 11-Bit Battery Voltage Setting
t0.8% Output Voltage Accuracy with Internal
Reference
' 3A max Battery Charge Current
Applications ' 6-Bit Charge Current Setting
Notebook Computers ' 99.99% max Duty Cycle for Low-Dropout Operation
Point-of-Sale Terminals O LoadISource Switchover Drivers
Personal Digital Assistants ' >97% Efficiency
Pin Configura tion Ordering Informa tion
TOP VIEW PART TEMP. RANGE PIN-PACKAGE
MAX1645EEI M(Y'C to +85°C 28 QSOP
DCIN [I E cvs
L00 E E PDS
CLS [E E CSSP
REF [1 E CSSN
ccs [E MAXIM E BST
cc) E MAX7645 E DHI
ccv [E El LX
GND [E E DLOV
BAIT [E E DLO
DAC [E E PGND
VDD E E CStP
THM E El csw
SCL E Er] POL Typical Operating Circuit appears at end of data sheet.
SOA E El W
QSOP SMBus is a trademark of Intel Corp
IVI/JXI/Vl Maxim Integrated Products 1
& the latest literature: http://, .
For small orders, phone 1-800-835-8769.
979LXVW
MAX1645
Advanced Chemistry-independent, Level 2
Battery Charger with Input Current Limiting
ABSOLUTE MAXIMUM RATINGS
DCIN, CVS, CSSP, CSSN, LX to GND ......
CSSP to CSSN,CSlPto CSIN .....
PDS,PDL10 GND VVVVV
BST to LX ........
DHI to LX ......
CSIP, CSIN, iiiffil', (END ...........
LDOto GND....
DLO to GND ___.
...,-O.3V to (lower of 6V or VDCIN + 0.3V)
_________F__F___l___ -0.3N/ to (VDLOV + 0.3V)
REF, DAC, CCV, CCI, CCS, CLS to GND ..... -(13V to (VLDO + 0.3V)
Operating Temperature Range ___.
Storage Temperature _FFFFFFFIFFFF
Lead Temperature (soldering, 10sec)
__ 03V to +3OV VDD, SCL, SDA, INT, DLOV to GND,-.,..,--) to +6V
............... -O.3V to +0.3V THM to GND...,..,,,,.,,...,.,,.,,.,,.-) to (VDD + 0.3V)
....-0.3Vt0 (Vcssp + 0.3V) PGND to GND ................................................ ..-O.3Vto +0.3V
............... -O,3Vto +6V LDO ContinuousCurrent.,......... -_.__.,,.,,.__50rT1A
(3V to (VEST + 0.3V) Continuous Power Dissipation (TA = +70°C)
....................... -0.3V10 +22V 28-Pin OSOP (derate 10.8mW/°C above +70°C).......860mW
....... -40°C to +85°C
60°C to +150°C
,,.+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
(Circuit of Figure 1, VDD = +3.3V, VBATT = +16.8V, VDCIN = +18V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°c.)
PARAMETER l SYMBOL I CONDITIONS MIN TYP MAX UNITS
GENERAL SPECIFICATIONS
DCIN Typical Operating Range Vocm 8 28 V
DCIN Supply Current IDCIN 8V < VDCIN < 28V 1.7 6 mA
DCIN Supply Current Charging
Inhibited 8V < VDCIN < 28V 0.7 2 mA
DCIN risin 7.5 7.85
DCIN Undervoltage Threshold m:nhQSCjRESENT DCIN falling; 7 7 4 V
LDO Output Voltage VLDO 8V < VDCIN < 28V, 0 < ILDO < 15mA 5.15 5.4 5.65 V
VDD Input Voltage Range
(Note1) 8V < VDCIN < 28V 2.8 5.65 V
- V risin 2.55 2.8
VDD Undervollage Threshold When the SMB res DD . g V
ponds to commands VDD falling 21 25
VDD Quiescent Current IDD SS
REF Output Voltage VREF O < IREF < 200PA 4066 4.0% 4.126 V
BATT Undervollage Threshold When ICHARGE drops to 128mA 2.4 2.8 V
(Note 2)
PDS Charging Source Switch ,
Tumoff Threshold VPDS-OFF chs referred to VBATT, chs falling 50 100 150 mV
PDS Charging Source Switch
Threshold Hysteresis VPDerHys chs referred to VBATT 100 200 300 mV
PDS Output Low Voltage, PDS _
Below CSSP lpDs - O 8 1O 12 V
PDS Turn-On Current PDS = CSSP 100 150 300 pA
PDS Turn-Off Current Vst = Vcssp - 2V, VDCIN = 16V 10 50 mA
PDL Load Switch Turn-Off , '
Threshol d VPDL-OFF chs referred to VBATT, chs nsmg -150 -100 -50 mV
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