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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1535C Datasheet

Highly Integrated Level 2 SMBus Battery Chargers

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MAX1535C pdf
19-3261; Rev 2; 10/05
EVAALVUAAILTAIOBNLEKIT
Highly Integrated Level 2 SMBus
Battery Chargers
General Description
The MAX1535B/MAX1535C/MAX1535D are highly inte-
grated, multichemistry battery chargers that simplify con-
struction of advanced smart chargers with a minimum
number of external components. They use Intel’s system
management bus (SMBus™) to control the charge volt-
age, charge current, and the maximum current drawn
from the AC adapter. High efficiency is achieved through
use of a constant off-time step-down topology with syn-
chronous rectification.
In addition to support of the Smart-Battery-Charger
Specifications Rev 1.1, the MAX1535B/MAX1535C/
MAX1535D include additional features. The maximum
current drawn from the AC adapter is programmable to
avoid overloads when supplying the load and the battery
charger simultaneously. This enables the user to reduce
the cost of the AC adapter. The MAX1535B/MAX1535C/
MAX1535D provide a digital output that indicates the
presence of an AC adapter. Based on the presence or
absence of the AC adapter, the MAX1535B/MAX1535C/
MAX1535D automatically select the appropriate source
for supplying power to the system by controlling two
external p-channel MOSFETs. Under system control, the
MAX1535B/MAX1535C/MAX1535D 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 MAX1535B/MAX1535C/MAX1535D are capable of
charging 2, 3, or 4 lithium-ion (Li+) cells in series, provid-
ing charge currents as high as 8A. The DC-DC converter
in the MAX1535B/MAX1535C/MAX1535D uses a high-
side p-channel switch with an n-channel synchronous
rectifier. The charge current and input current-limit sense
amplifiers have low input-offset errors and can use small-
value sense resistors (0.01, typ).
The MAX1535B/MAX1535C/MAX1535D are available in
a 5mm x 5mm, 32-pin, thin QFN package and operate
over the extended -40°C to +85°C temperature range.
An evaluation kit is available to reduce design time.
Applications
Notebook and Subnotebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
Features
Compliant with Level 2 Smart-Battery-Charger
Specifications Rev 1.1
Intel SMBus 2-Wire Serial Interface
±0.5% Charge-Voltage Accuracy
11-Bit Charge-Voltage Resolution
±3% Input Current-Limit Accuracy
Use Small (10m) Current-Sense Resistors
8A Maximum Charge Current
6-Bit Input and Charge-Current Resolution
8V to 28V Input Voltage Range
175s Charge Safety Timer
Automatic Selection of System Power Source
Charge Any Battery Chemistry (Li+, NiCd, NiMH,
Lead Acid, etc.)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX1535BETJ -40°C to +85°C
32 Thin QFN
(5mm x 5mm)
T3255-4
Ordering Information continued at end of data sheet.
Pin Configuration
TOP VIEW
24 23 22 21 20 19 18 17
DHIV 25
DHI 26
SRC 27
CSSN 28
CSSP 29
PDL 30
PDS 31
ACOK 32
MAX1535B
MAX1535C
MAX1535D
16 INT
15 SCL
14 SDA
13 THM
12 VDD
11 DAC
10 IMAX
9 VMAX
12345678
SMBus is a trademark of Intel Corp.
THIN QFN (5mm x 5mm)
________________________________________________________________ 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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1535C Datasheet

Highly Integrated Level 2 SMBus Battery Chargers

No Preview Available !

MAX1535C pdf
Highly Integrated Level 2 SMBus
Battery Chargers
ABSOLUTE MAXIMUM RATINGS
DCIN, CSSP, CSSN, SRC, ACOK to GND .............-0.3V to +30V
DHIV to SRC .............................................................-6V to +0.3V
DHI, PDL, PDS to GND ...............................-0.3V to VSRC + 0.3V
BATT, CSIP, CSIN to GND .....................................-0.3V to +20V
CSIP to CSIN, or CSSP to CSSN ...........................-0.3V to +0.3V
CCI, CCS, CCV, DAC, REF to GND ............-0.3V to VLDO + 0.3V
VDD, ACIN, SCL, SDA, DLOV, LDO, THM, INT, IMAX,
VMAX to GND...........................................................-0.3V to +6V
DLOV to LDO.........................................................-0.3V to +0.3V
DLO to PGND............................................-0.3V to VDLOV + 0.3V
PGND to GND .......................................................-0.3V to +0.3V
LDO Short-Circuit Current...................................................50mA
Continuous Power Dissipation (TA = +70°C)
32-Pin Thin QFN (derate 21.3mW/°C above +70°C) ...1702mW
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, VDD = 3.3V, ACIN = PGND = GND, LDO = DLOV,
VMAX = IMAX = REF, CLDO = 1µF, CDHIV = 0.1µF, CREF = 1µF, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless other-
wise noted.)
PARAMETER
CONDITIONS
CHARGE-VOLTAGE REGULATION
ChargeVoltage() = 0x41A0 and 0x3130
Charge-Voltage Accuracy
ChargeVoltage() = 0x20D0
ChargeVoltage() = 0x1060
ChargeVoltage() = 0x41A0
Full-Charge Voltage
ChargeVoltage() = 0x3130
ChargeVoltage() = 0x20D0
ChargeVoltage() = 0x1060
CHARGE-CURRENT REGULATION
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
VBATT = 12V
Compliance Current Accuracy
10msense resistor (R2 in Figure 1) between CSIP and
CSIN; ChargeCurrent() = 0x1F80
Charge Current
10msense resistor (R2 in Figure 1) between CSIP and
CSIN; ChargeCurrent() = 0x1F80
10msense resistor (R2 in Figure 1) between CSIP and
CSIN; ChargeCurrent() = 0x0080
BATT/CSIP/CSIN Input Voltage
Range
CSIP/CSIN Input Current
VDCIN = 0V, or charger not switching
VCSIP = VCSIN = 12V
INPUT-CURRENT REGULATION
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
VDCIN = 18V
MIN TYP MAX UNITS
-0.5
-0.8
-1.0
16.716
12.529
8.332
4.150
16.800
12.592
8.400
4.192
+0.5
+0.8
+1.0
16.884
12.655
8.468
4.234
%
V
76.60 80.64 84.67 mV
-5 +5 %
7.660 8.064 8.467
A
128 mA
0 19 V
0.1 1.0
300 700
µA
104.5 110.0 115.5 mV
2 _______________________________________________________________________________________


Part Number MAX1535C
Description Highly Integrated Level 2 SMBus Battery Chargers
Maker Maxim Integrated Products
Total Page 30 Pages
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