MAX8814ETA+T Maxim Integrated Products, MAX8814ETA+T Datasheet

IC LI+ BATT CHARGER 28V 8-TDFN

MAX8814ETA+T

Manufacturer Part Number
MAX8814ETA+T
Description
IC LI+ BATT CHARGER 28V 8-TDFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8814ETAT.pdf (11 pages)

Specifications of MAX8814ETA+T

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
0 V ~ 28 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-TDFN Exposed Pad
Product
Charge Management
Operating Supply Voltage
4.25 V to 6.8 V
Supply Current
0.23 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Charge Safety Timers
No
Mounting Style
SMD/SMT
Temperature Monitoring
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX8814 intelligent, stand-alone constant-current,
constant-voltage (CCCV), thermally regulated linear
charger is designed for charging a single-cell lithium-
ion (Li+) battery. The MAX8814 integrates the current-
sense circuit, MOSFET pass element, thermal-
regulation circuitry, and eliminates the reverse-blocking
Schottky diode to create the simplest and smallest
charging solution for handheld equipment.
The IC controls the charging sequence from the pre-
qualification state through constant-current fast-charge
and the final constant voltage charge. Proprietary ther-
mal-regulation circuitry limits the die temperature dur-
ing fast-charging or when the IC is exposed to high
ambient temperatures, allowing maximum charging
current without damaging the IC.
The MAX8814 achieves high flexibility by providing an
adjustable fast-charge current through an external
resistor. Other features include an active-low control
input (EN) and an active-low input power-source detec-
tion output (POK). The IC also features a booting assis-
tant circuit that distinguishes input sources and battery
connection and provides an output signal (ABO) for
system booting.
The MAX8814 accepts an input supply range from
4.25V to 28V, but disables charging if the input voltage
exceeds +7V to protect against unqualified or faulty AC
adapters. The IC operates over the extended tempera-
ture range (-40°C to +85°C) and is available in a com-
pact 8-pin thermally enhanced TDFN 2mm x 2mm
package (0.8mm max height).
19-0994; Rev 2; 3/08
Bluetooth is a registered trademark of Bluetooth SIG.
Pin Configuration appears at end of data sheet.
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.
Cellular and Cordless Phones
Smartphones and PDAs
MP3 Players
Digital Still Cameras
USB Appliances
Charging Cradles and Docks
Bluetooth
®
________________________________________________________________ Maxim Integrated Products
Equipment
General Description
28V Linear Li+ Battery Charger with
Applications
Smart Autoboot Assistant
♦ CCCV, Thermally Regulated Linear 1-Cell Li+
♦ No External MOSFET, Reverse Blocking Diode, or
♦ Programmable Fast-Charge Current (1A
♦ Proprietary Die Temperature Regulation Control
♦ 4.25V to 28V Input Voltage Range with Input OVP
♦ Charge-Current Monitor for Fuel Gauging (ISET)
♦ Low Dropout Voltage (300mV at 500mA)
♦ Input Power-Source Detection Output (POK),
♦ Soft-Start Limits Inrush Current
♦ Output for Autobooting (ABO)
♦ Tiny 2mm x 2mm, 8-Pin TDFN Package, 0.8mm
+ Denotes a lead-free and RoHS-compliant package.
MAX8814ETA+
Battery Charger
Current-Sense Resistor
(+115°C)
Above +7V
Charge-Enable Input (EN)
Height (max)
OFF
PART
4.25V TO 28V
ON
Typical Operating Circuit
-40°C to +85°C
TEMP RANGE
IN
EN
ISET
ABI
GND
Ordering Information
MAX8814
EP
BATT
POK
ABO
PIN-PACKAGE
8 TDFN
(2mm x 2mm)
SYSTEM
SUPPLY
Features
2.2μF
RMS
+
MARK
max)
Li+
TOP
ABI
1

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MAX8814ETA+T Summary of contents

Page 1

... Bluetooth Equipment Bluetooth is a registered trademark of Bluetooth SIG. Pin Configuration appears at end of data sheet. ________________________________________________________________ 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. Smart Autoboot Assistant ♦ CCCV, Thermally Regulated Linear 1-Cell Li+ Battery Charger ♦ ...

Page 2

Linear Li+ Battery Charger with Smart Autoboot Assistant ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V ABI, BATT, EN, POK to GND....................................-0.3V to +6V ABO to GND............................................-0. ISET to GND .............................................................-0. BATT ...

Page 3

Linear Li+ Battery Charger with ELECTRICAL CHARACTERISTICS (continued) = 1MΩ to BATT 0V 5V 4V, R POK IN BATT wise noted. Typical values are +25°C.) (Note 1) A PARAMETER ...

Page 4

Linear Li+ Battery Charger with Smart Autoboot Assistant = 1MΩ to BATT 0V 5V 4V, R POK IN BATT wise noted. Typical values are +25°C.) A CHARGE CURRENT vs. ...

Page 5

Linear Li+ Battery Charger with PIN NAME Input Supply Voltage. Bypass IN to GND with a 1µF or larger ceramic capacitor to minimize line noise 1 IN and maximize input transient rejection. Ground. Connect GND and the exposed paddle ...

Page 6

Linear Li+ Battery Charger with Smart Autoboot Assistant 4.25V TO 28V IN C1 1μF ISET R2 IN 2.8kΩ OVLO BATT V L MAX8814 Figure 1. Functional Diagram Detailed Description The MAX8814 charger uses voltage, current, and ther- ...

Page 7

Linear Li+ Battery Charger with V < 2.5V BATT PRECHARGE 10% CHARGE CURRENT V < 2.4V BATT FAST-CHARGE CONSTANT-CURRENT CHARGE 100% CHARGE CURRENT Figure 2. Charge-State Diagram Charger Enable Input The MAX8814 contains an active-low logic input (EN) used ...

Page 8

Linear Li+ Battery Charger with Smart Autoboot Assistant FACTORY TEST FIXTURE OR AC ADAPTER R1 10kΩ GND 0.1μF Figure 3. Microprocessor-Interfaced Li+ Battery Charger Applications Information Charge-Current Selection The maximum charging current is programmed by an external resistor connected ...

Page 9

Linear Li+ Battery Charger with VBUS USB PORT GND Figure 4. USB Battery Charger Application Circuits Microprocessor-Interfaced Charger Figure 3 shows the MAX8814 as a microprocessor- cooperated Li+ battery charger. The MAX8814 begins charging the battery when EN is ...

Page 10

Linear Li+ Battery Charger with Smart Autoboot Assistant Pin Configuration TOP VIEW BATT POK EN ABO MAX8814 EXPOSED PADDLE + GND ISET ABI TDFN 2mm x 2mm 10 ______________________________________________________________________________________ Package ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2008 Maxim Integrated Products ...

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