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PDF MAX17035 Data sheet ( Hoja de datos )
| Número de pieza | MAX17035 | |
| Descripción | High-Frequency Low-Cost SMBus Chargers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4817; Rev 0; 7/09
EVAALVUAAILTAIOBNLEKIT
www.DataSheet4U.com
High-Frequency,
Low-Cost SMBus Chargers
General Description
The MAX17035/MAX17435/MAX17535 integrated multi-
chemistry battery chargers IC simplify construction
of accurate and efficient chargers. The MAX17035/
MAX17435/MAX17535 provide SMBusK-programmable
charge current, charge voltage, input current limit, relearn
voltage, and digital readback of the IINP voltage. The
MAX17035/ MAX17435/MAX17535 utilize a charge pump
to control the adapter selection n-channel MOSFETs
when the adapter is present. When the adapter is absent,
the charge pump is shut down and a p-channel MOSFET
selects the battery.
The MAX17035/MAX17435/MAX17535 provide up to 7A
of charge current to 2, 3, or 4 lithium-ion (Li+) cells in
series. The charge current, and input current-limit sense
amplifiers have low offset errors and can use 10mI
sense resistors. The MAX17035/MAX17435/MAX17535
fixed-inductor ripple architecture significantly reduces
component size and circuit cost.
The MAX17035/MAX17435/MAX17535 provide a digital
output that indicates the presence of the adapter, an
analog output that indicates the adapter or battery
current, depending upon the presence or absence of
the adapter, and a digital output that indicates when the
adapter current exceeds a user-defined threshold.
The MAX17035 operates with a switching frequency of
1.2MHz. The MAX17435 switches at 850kHz, and the
MAX17535 switches at 500kHz.
The MAX17035/MAX17435/MAX17535 are available in
a small, 4mm x 4mm x 0.75mm 24-pin, lead-free QFN
package. An evaluation kit is available.
Applications
Notebook Computers
PDAs and Mobile Communicators
2- to-4 Li+ Cell Battery-Powered Devices
Features
S Low-Cost SMBus Charger
S High Switching Frequency (1.2MHz, 0.85MHz,
0.5MHz)
S Internal Boost Switches
S SMBus-Programmable Charge Voltage, Input
Current Limit, Charge Current, Relearn Voltage,
and Digital IINP Readback
S Single-Point Compensation
S Automatic Selection of System Power Source
Adapter n-channel MOSFETs Driven by an
Internal Dedicated Charge Pump
Adapter Soft-Start
S ±0.4% Accurate Charge Voltage
S ±2.5% Accurate Input Current Limiting
S ±3% Accurate Charge Current
S Monitor Outputs for
AC Adapter Current (±2% Accuracy)
Battery Discharge Current (±2% Accuracy)
AC Adapter Presence
S AC Adapter Overvoltage Protection
S 11-Bit Battery Voltage Setting
S 6-Bit, Charge-Current Setting/Input Current Setting
S Improved IINP Accuracy at Low Input Current
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX17035ETG+*
-40NC to +85NC 24 TQFN-EP**
MAX17435ETG+
-40NC to +85NC 24 TQFN-EP**
MAX17535ETG+*
-40NC to +85NC 24 TQFN-EP**
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
**EP = Exposed pad.
Pin Configuration
TOP VIEW
18 17 16 15 14 13
ACIN 19
12 CSIP
ITHR 20
11 CSIN
VAA 21
VCC 22
GND 23
EN 24
MAX17035
MAX17435
MAX17535
10 ACOK
9 DH
8 LX
7 BST
12 3456
SMBus is a trademark of Intel Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
www.DataSheet4U.com
High-Frequency,
Low-Cost SMBus Chargers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, no load on LDO, VDCIN = VCSSP = VCSSN = 19V, VLX = 0V, VBST - VLX = 5V, VBATT = VCSIP = VCSIN = 16.8V,
TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
ADAPTER OVERVOLTAGE PROTECTION
ACOVP Threshold
Rising
ACOVP Threshold Hysteresis
ADAPTER OVERCURRENT PROTECTION
ACOCP Threshold
With respect to VCSSP - VCSSN
ACOCP Blanking Time
MIN TYP MAX UNITS
2.04
2
2.1
V
30 mV
144 mV
16 ms
ACOCP Waiting Time
When ACOCP comparator is high and at the
time the blanking time expires
0.6
s
PDSL SWITCH CONTROL
PDSL Turn-Off Resistance
SMBus TIMING SPECIFICATIONS
SMBus Frequency
fSMB
Bus Free Time
tBUF
START Condition Hold Time
from SCL
tHD:STA
2.5 4
kI
10 100 kHz
4.7 Fs
4 Fs
START Condition Setup Time
from SCL
tSU:STA
4.7 Fs
STOP Condition Setup Time
from SCL
tSU:STO
4 Fs
Holdup Time from SCL
Setup Time from SCL
SCL Low Period
SCL High Period
tHD:DAT
tSU:DAT
tLOW
tHIGH
300 ns
250 ns
4.7 Fs
4 Fs
Maximum Charging Period
Without a Charge_Voltage() or
ChargeCurrent() Command
140 175 210
s
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, no load on LDO, VDCIN = VCSSP = VCSSN = 19V, VLX = 0V, VBST - VLX = 5V, VBATT = VCSIP = VCSIN = 16.8V,
TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
INPUT SUPPLIES
Adapter Present Quiescent
Current
SYMBOL
CONDITIONS
IDCIN + ICSSP +
ICSSN (Note 1)
Charging enabled,
VADAPTER = 19V,
VBATTERY = 16.8V
Charging disabled
MIN
MAX UNITS
6 mA
2.2 mA
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
High-Frequency,
Low-Cost SMBus Chargers
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 19V, VCC = VDD = 5V, EN = VCC, TA = +25NC, unless otherwise specified.)
5.48
5.46
5.44
5.42
5.40
5.38
5.36
5.34
0
LDO VOLTAGE
vs. LDO CURRENT
10 20 30 40
LDO CURRENT (mA)
50
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0
VAA DEVIATION, SWITCHING
AND NOT SWITCHING
SWITCHING
NOT SWITCHING
5 10 15 20 25
DCIN (V)
30
VAA vs. TEMPERATURE
4.110
4.105
4.100
4.095
4.090
4.085
4.080
-40 -20
0 20 40 60
TEMPERATURE (NC)
80 100
1000
900
800
700
600
500
400
300
200
100
0
0
FREQUENCY
vs. VBATT AT 4A ICHG
5 10 15
VBATT (V)
POWER-SOURCE SELECTOR SCHEME
WITH BATTERY PRESENT
(ADAPTER REMOVAL)
MAX17035 toc17
PDSL
5V/div
VADAPTER
5V/div
VSYSLD
5V/div
VBATT
5V/div
20 10ms/div
POWER-SOURCE SELECTOR SCHEME
WITH BATTERY PRESENT
(ADAPTER INSERTION)
MAX17035 toc18
PDSL
5V/div
VSYSLD
5V/div
VBATT
5V/div
40ms/div
VADAPTER
5V/div
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet MAX17035.PDF ] | |
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