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MAX8845ZETC+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

MAX8845ZETC+T Overview

battery management 28v linear Li+ battery charger

MAX8845ZETC+T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time1 week
Samacsys Descripti28V Linear Li+ Battery Chargers
JESD-30 codeS-PQCC-N12
JESD-609 codee3
Humidity sensitivity level1
Number of terminals12
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeQCCN
Encapsulate equivalent codeLCC12,.12SQ,20
Package shapeSQUARE
Package formCHIP CARRIER
Peak Reflow Temperature (Celsius)225
power supply5 V
Certification statusNot Qualified
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
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.

MAX8845ZETC+T Related Products

MAX8845ZETC+T MAX8845WETC+ MAX8845YETC+T
Description 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
Is it Rohs certified? conform to conform to conform to
Maker Maxim Maxim Maxim
Reach Compliance Code compli compli compli
ECCN code EAR99 EAR99 EAR99
Samacsys Descripti 28V Linear Li+ Battery Chargers 28V Linear Li+ Battery Chargers 28V Linear Li+ Battery Chargers
JESD-30 code S-PQCC-N12 S-XQCC-N12 S-PQCC-N12
Humidity sensitivity level 1 1 1
Number of terminals 12 12 12
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Package body material PLASTIC/EPOXY UNSPECIFIED PLASTIC/EPOXY
encapsulated code QCCN HVQCCN QCCN
Package shape SQUARE SQUARE SQUARE
Package form CHIP CARRIER CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER
Peak Reflow Temperature (Celsius) 225 NOT SPECIFIED 225
Certification status Not Qualified Not Qualified Not Qualified
Nominal supply voltage (Vsup) 5 V 5 V 5 V
surface mount YES YES YES
technology BICMOS BICMOS BICMOS
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal form NO LEAD NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm 0.5 mm
Terminal location QUAD QUAD QUAD
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Factory Lead Time 1 week - 1 week
JESD-609 code e3 - e3
Encapsulate equivalent code LCC12,.12SQ,20 - LCC12,.12SQ,20
power supply 5 V - 5 V
Terminal surface Matte Tin (Sn) - Matte Tin (Sn)
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