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| 型号： | MAX8971EWP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/39页 |
| 文件大小： | 0K |
| 描述： | IC DCDC CHRGR LI+ 1CELL 20WLP |
| 标准包装： | 2,500 |
| 功能： | 充电管理，过压/欠压保护 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4 V ~ 7.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
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EVALUATION KIT AVAILABLE
AVAILAB
L
E
MAX8971
Industry's Smallest 1.55A
1-Cell Li+ DC-DC Charger
General Description
The MAX8971 is a compact, high-frequency, high-
efficiency switch-mode charger for a one-cell lithium-ion
(Li+) battery. It delivers up to 1.55A of current to the
battery from inputs up to 7.5V and withstands transient
inputs up to 22V. The 4MHz switch-mode charger is
ideally suited for small portable devices, such as head-
sets and ultra-portable media players. It minimizes
component size and heat.
Battery-protection features include: low-voltage prequali-
fication, charge fault timer, die temperature monitoring,
and battery temperature monitoring. The battery
temperature monitoring adjusts the charge current and
termination voltage for safe use of secondary lithium-ion
batteries.
The IC accepts either a general DC input or USB.
It has programmable automatic input-current limiting to pro-
tect upstream charging sources such as USB.
Charge parameters are easily adjustable through an I 2 C
interface. Charge is terminated based on user-selectable
minimum current level. A safety timer with reset control
provides a safety backup for I 2 C interface. Charge status
is provided to the application processor through an inter-
rupt pin.
The IC is available in a space-saving, 20-bump, 2.18mm
x 1.62mm WLP package.
Applications
Benefits and Features
S Switch-Mode Charger
? High-Efficiency
? Low Heat
? Fast Charge Time
S Small and Simple
S Precise
? Up to Q 5% Current Regulation and 0.5% Voltage
Regulation
S Safe
? JEITA Battery Temperature Monitor
? Over/Undervoltage Protection, Safety Timers,
Temperature Regulation
? USB Friendly
S Flexible
? Programmable Voltage/Current
? Status/Interrupts Through I 2 C
? Automatic Input Current Limit
S I 2 C Interface
? Input Current Limit (100mA to 1500mA)
? Fast-Charge / Termination Current (250mA to
1550mA)
? Charge Voltage (4.1V, 4.15V, 4.2V, 4.35V)
? Safety Timer
USB Charging
Media Players
Headsets and Functional
Smartphones
Digital Cameras
GPS, PDAs
Diagrams
? Termination Enable
S +22V Absolute Maximum Input Voltage Rating
S Up to 7.5V Maximum Operating Input Voltage
S 5V USB/Safeout LDO for USB PHY
S 2.3A GSM RF Test Mode (Factory Testing)
S Charge Current to Voltage Conversion (V ICHG ) for
Baseband ADC
S Reverse Battery Leakage Protection
S Input /Output Overvoltage Protection
S Interrupt Status Output
For related parts and recommended products to use with this part,
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
refer to www.maxim-ic.com/MAX8971.related .
Simplified Applications Circuit appears at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim integrated .com.
19-4245; Rev 0; 1/12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8971QEWP+T | 功能描述:电池管理 Switch-Mode Li+ 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 |
| MAX8973AEWI+ | 制造商:Maxim Integrated Products 功能描述:HIGH CURRENT, MULTI-PHASE DC/DC STEP-DOWN CONVERTER - Rail/Tube |
| MAX8973AEWI+T | 制造商:Maxim Integrated Products 功能描述:HIGH CURRENT, MULTI-PHASE DC/DC STEP-DOWN CONVERTER - Tape and Reel |
| MAX8982AEWO+T | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR ICERA E400/E450 PLATFORM-MINI CARD - Tape and Reel |
| MAX8982EWO+T | 功能描述:PMIC 解决方案 PMIC for ICERA E400/E450 Platform RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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