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| 型号： | MAX8844YETD+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 28V Dual Input Linear Li+ Battery Chargers with Battery Detection and Overvoltage-Protected Output; Package: TDFN-EP;14 pin;10 mm² ; Temperature: -40°C to +85°C |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, DSO14 |
| 封装： | 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TDFN-14 |
| 文件页数： | 1/17页 |
| 文件大小： | 228K |
| 代理商： | MAX8844YETD+ |
General Description
The MAX8844Z/MAX8844Y intelligent, stand-alone con-
stant-current, constant-voltage (CCCV), thermally regu-
lated dual input linear chargers are designed for
charging a single-cell lithium-ion (Li+) battery. The
MAX8844Z/MAX8844Y 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 IC controls 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 IC is exposed to high
ambient temperatures, allowing maximum charging
current without damaging the IC.
The MAX8844Z/MAX8844Y achieve high flexibility by pro-
viding adjustable fast-charge currents (SETI) and an
adjustable top-off current threshold (MIN) through external
resistors. The IC features a booting assistant circuit that
distinguishes input sources and battery connection and
provides an enable signal (ABO, ABO) for system booting.
The ICs also integrate two input overvoltage-protected
LDO outputs (SAFEOUT, SAFEUSB) for low-voltage-
rated USB or charger inputs in system, and a battery
pack detection circuit (DETBAT) that disables the charg-
er 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 MAX8844Z/MAX8844Y automatically select between
either the USB or IN source. If both sources are present
at the same time, highest priority is given to the IN source.
The IN source is selected to ensure the shortest charging
time for the system since it is able to deliver the highest
current.
The MAX8844Z/MAX8844Y accept an input supply range
from 4.25V to 28V (IN and USB), but disable charging if
the input voltage exceeds +7.5V to protect against
unqualified or faulty AC adapters. The ICs operate over
the extended temperature range (-40°C to +85°C) and are
available in a compact 14-pin, thermally enhanced, lead-
free TDFN 3mm x 3mm package (0.8mm max height).
Applications
Features
CCCV, Thermally Regulated Linear One-Cell Li+
Battery Charger
No External MOSFET, Reverse Blocking Diode, or
Current-Sense Resistor
Programmable Fast-Charge Currents (1ARMS max)
Programmable Top-Off Current Threshold
Input Overvoltage Protected 4.7V Output
(SAFEOUT) from IN
Input Overvoltage Protected 4.7V Output
(SAFEUSB) from USB
Proprietary Die Temperature Regulation Control
(+115°C)
4.25V to 28V Input Voltage Range with Input
Overvoltage Protection Above +7.5V
Low-Dropout Voltage (300mV at 500mA)
Input Power-Source Detection Output (POK),
Charge Status Output (
CHG), Charge-Enable Input
(
EN)
Output for Autobooting (ABO, MAX8844Z)
Output for Autobooting (ABO, MAX8844Y)
Tiny 3mm x 3mm, 14-Pin TDFN Package, 0.8mm
Height (max)
MAX8844Z/MAX8844Y
28V Dual Input Linear Li+ Battery Chargers with
Battery Detection and Overvoltage-Protected Output
________________________________________________________________
Maxim Integrated Products
1
19-4279; Rev 0; 3/09
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.
EVALUATION KIT
AVAILABLE
Ordering Information
PART
PIN-
PACKAGE
TOP MARK
ABO
ACTIVE
STATE
MAX8844ZETD+
14 TDFN-EP*
AEK
Active high
MAX8844YETD+
14 TDFN-EP*
AEN
Active low
Cellular and Cordless
Phones
Smart Phones and PDAs
Digital Still Cameras
MP3 Players
USB Appliances
Charging Cradles and
Docks
Bluetooth Equipment
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
Bluetooth is a registered trademark of Bluetooth SIG.
Typical Operating Circuit and Pin Configuration appear at
end of data sheet.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX8844ZETD+ | 28V Dual Input Linear Li+ Battery Chargers with Battery Detection and Overvoltage-Protected Output; Package: TDFN-EP;14 pin;10 mm² ; Temperature: -40°C to +85°C |
| MAX8878EZK20-T | 2 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PDSO5 |
| MAX8878EZK21-T | 2.1 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PDSO5 |
| MAX8878EZK23-T | 2.3 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PDSO5 |
| MAX8878EZK24-T | 2.4 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PDSO5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8844YETD+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX8844YETD+T | 功能描述:电池管理 28V Linear Li+ Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8844ZETD+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX8844ZETD+T | 功能描述:电池管理 28V Linear Li+ Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8844ZEVKIT+ | 功能描述:电源管理IC开发工具 MAX8844Y/Z Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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