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1909ETI PDF даташит

Спецификация 1909ETI изготовлена ​​​​«Maxim Integrated Products» и имеет функцию, называемую «MAX1909ETI».

Детали детали

Номер произв 1909ETI
Описание MAX1909ETI
Производители Maxim Integrated Products
логотип Maxim Integrated Products логотип 

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1909ETI Даташит, Описание, Даташиты
19-2805; Rev 2; 9/04
EVALUATION
KIT
AVAILABLE
www.DataSheet4U.com
Multichemistry Battery Chargers with Automatic
System Power Selector
General Description
The MAX1909/MAX8725 highly integrated control ICs
simplify construction of accurate and efficient multi-
chemistry battery chargers. The MAX1909/MAX8725
use analog inputs to control charge current and volt-
age, and can be programmed by a host microcontroller
(µC) or hardwired. High efficiency is achieved through
use of buck topology with synchronous rectification.
The maximum current drawn from the AC adapter is pro-
grammable to avoid overloading the AC adapter when
supplying the load and the battery charger simultane-
ously. The MAX1909/MAX8725 provide a digital output
that indicates the presence of an AC adapter, and an
analog output that monitors the current drawn from the
AC adapter. Based on the presence or absence of the
AC adapter, the MAX1909/MAX8725 automatically select
the appropriate source for supplying power to the sys-
tem by controlling two external p-channel MOSFETs.
Under system control, the MAX1909/MAX8725 allow the
battery to undergo a relearning or conditioning cycle in
which the battery is completely discharged through the
system load and then recharged.
The MAX1909 includes a conditioning charge feature
while the MAX8725 does not. The MAX1909/MAX8725
are available in space-saving 28-pin, 5mm 5mm thin
QFN packages and operate over the extended -40°C to
+85°C temperature range. The MAX1909/MAX8725 are
now available in lead-free packages.
Applications
Notebook and Subnotebook Computers
Hand-Held Data Terminals
Pin Configuration
TOP VIEW
28 27 26 25 24 23 22
DCIN 1
LDO 2
ACIN 3
REF 4
GND/PKPRES 5
ACOK 6
MODE 7
MAX1909
MAX8725
21 DLOV
20 DLO
19 PGND
18 CSIP
17 CSIN
16 BATT
15 GND
8 9 10 11 12 13 14
THIN QFN
Features
±0.5% Accurate Charge Voltage (0°C to +85°C)
±3% Accurate Input Current Limiting
±5% Accurate Charge Current
Programmable Charge Current >4A
Automatic System Power-Source Selection
Analog Inputs Control Charge Current and
Charge Voltage
Monitor Outputs for
Current Drawn from AC Input Source
AC Adapter Presence
Up to 17.65V (max) Battery Voltage
Maximum 28V Input Voltage
Greater than 95% Efficiency
Charge Any Battery Chemistry: Li+, NiCd, NiMH,
Lead Acid, etc.
Ordering Information
PART
TEMP RANGE
MAX1909ETI
-40°C to +85°C
MAX1909ETI+
-40°C to +85°C
MAX8725ETI
-40°C to +85°C
MAX8725ETI+
-40°C to +85°C
+Denotes lead-free package.
PIN-PACKAGE
28 Thin QFN
28 Thin QFN
28 Thin QFN
28 Thin QFN
Minimum Operating Circuit
AC ADAPTER: INPUT
P3
0.01
CSSP
PDS
SRC
DCIN
CSSN
DHIV
PDL
VCTL
MAX1909
MAX8725
LDO
LDO ICTL
MODE
DLOV
ACIN
LDO IINP IINP
REF CLS
DHI
ACOK
LDO
DLO
MAX8725 ONLY
PKPRES
PGND
CSIP
CCV
CSIN
CCI
BATT
CCS REF GND
TO
EXTERNAL LOAD
SRC
P2
P1
N1 10µH
0.015
Functional Diagrams appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.









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1909ETI Даташит, Описание, Даташиты
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Multichemistry Battery Chargers with Automatic
System Power Selector
ABSOLUTE MAXIMUM RATINGS
DCIN, CSSP, CSSN, SRC, ACOK to GND..............-0.3V to +30V
DHIV ........................................................…SRC + 0.3, SRC - 6V
DHI, PDL, PDS to GND ...............................-0.3V to (VSRC + 0.3)
BATT, CSIP, CSIN to GND .....................................-0.3V to +20V
CSIP to CSIN or CSSP to CSSN or PGND to GND ...-0.3V to +0.3V
CCI, CCS, CCV, DLO, IINP, REF,
ACIN to GND ........................................-0.3V to (VLDO + 0.3V)
DLOV, VCTL, ICTL, MODE, CLS, LDO,
PKPRES to GND ...................................................-0.3V to +6V
DLOV to LDO.........................................................-0.3V to +0.3V
DLO to PGND ..........................................-0.3V to (DLOV + 0.3V)
LDO Short-Circuit Current...................................................50mA
Continuous Power Dissipation (TA = +70°C)
28-Pin TQFN (derate 20.8mW/°C above +70°C) .......1666mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+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, VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float, ACIN = 0, CLS =
REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CHARGE VOLTAGE REGULATION
VCTL Range
CONDITIONS
MIN TYP MAX UNITS
0 3.6 V
VVCTL = 3.6V (3 or 4 cells);
not including VCTL resistor tolerances
-0.8
+0.8
Battery Regulation Voltage
Accuracy
VVCTL = 3.6V/20 (3 or 4 cells); not including
VCTL resistor tolerances
VVCTL = 3.6V (3 or 4 cells); including VCTL
resistor tolerances of 1%
-0.8
-1.0
+0.8
+1.0
%
VVCTL Default Threshold
VCTL Input Bias Current
CHARGE-CURRENT REGULATION
ICTL Range
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
VVCTL = VLDO (3 or 4 cells, default
threshold of 4.2V/cell)
VVCTL rising
VVCTL = 3V
VDCIN = 0, VVCTL = 5V
-0.5
4.1
0
0
+0.5
4.3
2.5
12
V
µA
MAX1909
MAX8725
0 3.6
0 3.2
69.37 75.00 80.63
MAX1909: VICTL = 3.6V (not including ICTL
resistor tolerances)
MAX8725: VICTL = 3.2V (not including ICTL
resistor tolerances)
-7.5
-5
+7.5
+5
V
mV
Charge-Current Accuracy
MAX1909: VICTL = 3.6V x 0.5, MAX8725:
VICTL = 3.2V x 0.5 (not including ICTL
resistor tolerances)
-5
+5 %
MAX1909: VICTL = 0.9V (not including ICTL
resistor tolerances)
-7.5
+7.5
MAX8725: VICTL = 0.18V (not including
ICTL resistor tolerances)
-30
+30
2 _______________________________________________________________________________________









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1909ETI Даташит, Описание, Даташиты
www.DataSheet4U.com
Multichemistry Battery Chargers with Automatic
System Power Selector
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float, ACIN = 0, CLS =
REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Charge-Current Accuracy
MAX1909: VICTL = 3.6V x 0.5, MAX8725:
VICTL = 3.2V x 0.5 (including ICTL resistor
tolerances of 1%)
-7.0
+7.0
%
VICTL Default Threshold
BATT/CSIP/CSIN Input Voltage
Range
VICTL = VLDO (default threshold of 45mV)
-5
+5
VICTL rising
4.1 4.2 4.3
0 19
V
V
CSIP/CSIN Input Current
ICTL Power-Down Mode
Threshold Voltage
ICTL Power-Up Mode Threshold
Voltage
ICTL Input Bias Current
INPUT CURRENT REGULATION
Charging enabled
350 650
Charging disabled; VDCIN = 0 or VICTL = 0
0.1 1
MAX1909
0.75
MAX8725
0.06
MAX1909
0.85
MAX8725
0.11
VICTL = 3V
-1 +1
VDCIN = 0V, VICTL = 5V
-1 +1
µA
V
V
µA
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
Input Current-Limit
Accuracy
CSSP/CSSN Input Voltage Range
CSSP/CSSN Input Current
CLS Input Range
CLS Input Bias Current
IINP Transconductance
VCLS = REF
VCLS = REF x 0.75
VCLS = REF x 0.5
VCSSP = VCSSN = VDCIN > 8.0V
VDCIN = 0
VCLS = 2.0V
VCSSP - VCSSN = 56mV
VCSSP - VCSSN = 75mV, terminated with
10k
72.75 75.00 77.25
-3 +3
-3 +3
-4 +4
8.0 28
450 730
0.1 1
1.6 REF
-1 +1
2.7 3.0 3.3
-7.5 +7.5
mV
%
V
µA
V
µA
mA/V
IINP Accuracy
VCSSP - VCSSN = 56mV, terminated with
10k
-5
+5 %
IINP Output Current
IINP Output Voltage
VCSSP - VCSSN = 20mV, terminated with
10k
VCSSP - VCSSN = 150mV, VIINP = 0V
VCSSP - VCSSN = 150mV, VIINP = float
-10
350
3.5
+10
µA
V
_______________________________________________________________________________________ 3










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