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MAX8845XETC+T

Description
Battery Management 28V Linear Li+ Battery Charger
CategoryPower/power management    The power supply circuit   
File Size267KB,19 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX8845XETC+T Overview

Battery Management 28V Linear Li+ Battery Charger

MAX8845XETC+T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
package instructionQFN-12
Reach Compliance Codecompliant
ECCN codeEAR99
Factory Lead Time1 week
Samacsys Description28V Linear Li+ Battery Chargers
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-XQCC-N12
length3 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals12
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum seat height0.8 mm
Maximum supply voltage (Vsup)28 V
Minimum supply voltage (Vsup)
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width3 mm
19-4340; Rev 1; 9/09
IT
TION K
VALUA
E
BLE
AVAILA
28V Linear Li+ Battery Chargers with Battery
Detection and Overvoltage Protected Output
General Description
The MAX8845Z/MAX8845Y/MAX8845X/MAX8845W are
intelligent, stand-alone constant-current, constant-volt-
age (CCCV), thermally regulated linear chargers
designed for charging a single-cell lithium-ion (Li+) bat-
tery. The MAX8845Z/MAX8845Y/MAX8845X/MAX8845W
integrate a current-sense circuit, MOSFET pass element,
thermal-regulation circuitry, and eliminate the external
reverse-blocking Schottky diode to create the simplest
and smallest charging solutions for handheld equipment.
The ICs control the charging sequence from the pre-
qualification state through constant current fast-charge,
top-off charge, and full-charge indication. Proprietary
thermal-regulation circuitry limits the die temperature
during fast-charging or when the ICs are exposed to
high ambient temperatures, allowing maximum charg-
ing current without damaging the ICs.
The MAX8845Z/MAX8845Y/MAX8845X/MAX8845W
achieve high flexibility by providing adjustable fast-
charge currents (SETI) and an adjustable top-off cur-
rent threshold (MIN) through external resistors. The
MAX8845Z/MAX8845Y/MAX8845X/MAX8845W feature
a booting assistant circuit that distinguishes input
sources and battery connection and provides an
enable signal (ABO—MAX8845Z and
ABO—
MAX8845Y/MAX8845X/MAX8845W) for system booting.
The MAX8845Z/MAX8845Y/MAX8845X/MAX8845W also
integrate an overvoltage-protected output (SAFEOUT) for
low voltage-rated USB or charger inputs in system, and a
battery-pack detection circuit (DETBAT) that disables the
charger when the battery pack is absent. Other features
include an active-low control input (EN), an active-low
input power source detection output (POK), and a fully
charged top-off threshold detection output (CHG).
The MAX8845Z/MAX8845Y/MAX8845X/MAX8845W
accept an input supply range from 4.25V (4.4V for
MAX8845W only) to 28V, but disable charging if the
supply voltage exceeds +7.5V (+8.0V for MAX8845X
only) to protect against unqualified or faulty AC
adapters. The ICs operate over the extended tempera-
ture range (-40°C to +85°C) and are available in a com-
pact 12-pin, thermally enhanced thin QFN, 3mm x 3mm
package (0.8mm max height).
Features
o
CCCV, Thermally Regulated Linear 1-Cell Li+
Battery Charger
o
No External MOSFET, Reverse Blocking Diode, or
Current-Sense Resistor
o
Programmable Fast-Charge Currents (1A
RMS
max)
o
Programmable Top-Off Current Threshold (MIN)
o
Input Overvoltage Protected 4.7V Output
(MAX8845Z/MAX8845Y/MAX8845W) or 4.85V
(MAX8845X) (SAFEOUT)
o
Proprietary Die Temperature Regulation Control
(+115°C)
o
4.25V (4.4V for MAX8845W only) to 28V Input
Voltage Range with Input Overvoltage Protection
Above +7.5V (+8.0V for MAX8845X only)
o
Low-Dropout Voltage (300mV at 500mA)
o
Input Power-Source Detection Output (POK),
Charge Status Output (CHG), Charge-Enable Input
(EN)
o
Output for Autobooting (ABO—MAX8845Z,
ABO—MAX8845Y/MAX8845X/MAX8845W)
o
Tiny, 3mm x 3mm 12-Pin Thin QFN Package,
0.8mm Height (max)
MAX8845Z/MAX8845Y/MAX8845X/MAX8845W
Ordering Information
PART
MAX8845ZETC+
MAX8845YETC+
MAX8845XETC+
MAX8845WETC+
PIN-PACKAGE
12 Thin QFN-EP*
12 Thin QFN-EP*
12 Thin QFN-EP*
12 Thin QFN-EP*
TOP
MARK
ABL
ABM
ABQ
ABR
ABO
ACTIVE
STATE
Active high
Active low
Active low
Active low
Applications
Cellular and Cordless Phones
Smart Phones and PDAs
Digital Still Cameras
MP3 Players
USB Appliances
Charging Cradles and Docks
Bluetooth
®
Equipment
Note:
All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
Bluetooth is a registered trademark of Bluetooth SIG.
1
________________________________________________________________
Maxim Integrated Products
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.

MAX8845XETC+T Related Products

MAX8845XETC+T MAX8845XETC+ MAX8845WETC+T MAX8845ZETC+
Description Battery Management 28V Linear Li+ Battery Charger Battery Management 28V Linear Li+ Battery Charger Battery Management 28V Linear Li+ Battery Charger Battery Management 28V Linear Li+ Battery Charger
Is it lead-free? Lead free Lead free Lead free Lead free
Is it Rohs certified? conform to conform to conform to conform to
package instruction QFN-12 HVQCCN, QFN-12 HVQCCN, LCC12,.12SQ,20
Reach Compliance Code compliant compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99
Adjustable threshold YES YES YES YES
Analog Integrated Circuits - Other Types POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code S-XQCC-N12 S-XQCC-N12 S-XQCC-N12 S-XQCC-N12
length 3 mm 3 mm 3 mm 3 mm
Humidity sensitivity level 1 1 1 1
Number of channels 1 1 1 1
Number of functions 1 1 1 1
Number of terminals 12 12 12 12
Maximum operating temperature 85 °C 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C
Package body material UNSPECIFIED UNSPECIFIED UNSPECIFIED UNSPECIFIED
encapsulated code HVQCCN HVQCCN HVQCCN HVQCCN
Package shape SQUARE SQUARE SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Maximum seat height 0.8 mm 0.8 mm 0.8 mm 0.8 mm
Maximum supply voltage (Vsup) 28 V 28 V 28 V 28 V
Nominal supply voltage (Vsup) 5 V 5 V 5 V 5 V
surface mount YES YES YES YES
technology BICMOS BICMOS BICMOS BICMOS
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal form NO LEAD NO LEAD NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm 0.5 mm 0.5 mm
Terminal location QUAD QUAD QUAD QUAD
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 3 mm 3 mm 3 mm 3 mm
Maker Maxim Maxim - Maxim
Factory Lead Time 1 week 1 week 1 week -
Samacsys Description 28V Linear Li+ Battery Chargers 28V Linear Li+ Battery Chargers - 28V Linear Li+ Battery Chargers
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