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参数资料
| 型号： | MAX8814ETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI+ 28V 8TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 0 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（2x2） |
| 包装： | 标准包装 |
| 其它名称： | MAX8814ETA+TDKR |
28V Linear Li+ Battery Charger with
Smart Autoboot Assistant
FACTORY TEST
FIXTURE
OR
AC ADAPTER
R1
10k Ω
C1
1 μ F
IN
ABI
MAX8814
BATT
C3
2.2 μ F
VI/O
Li+
SYSTEM
GND
C2
0.1 μ F
ABO
POK
EN
R3
1M Ω
GPIO
GPIO
GND
EP
ISET
R2
2.8k Ω
R4
10k Ω
C4
0.1 μ F
ADC
POWER
SUPPLY
ON
Figure 3. Microprocessor-Interfaced Li+ Battery Charger
Applications Information
Charge-Current Selection
The maximum charging current is programmed by an
external resistor connected from ISET to GND (R ISET ).
Calculate R ISET as follows:
Capacitor Selection
Connect a ceramic capacitor from BATT to GND for
proper stability. Use a 2.2μF X5R ceramic capacitor for
most applications. Connect a 1μF ceramic capacitor
from IN to GND. Use a larger input bypass capacitor
for high charging currents to reduce supply noise.
R ISET =
1596 V
I FAST ? CHARGE
Thermal Considerations
The MAX8814 is available in a thermally enhanced
TDFN package with an exposed paddle. Connect the
V ISET = CHARGE ISET
where I FAST-CHARGE is in amperes and R ISET is in
ohms. ISET can be used to monitor the fast-charge cur-
rent level. The output current from ISET is 877.2μA per
ampere of charging current. The output voltage at ISET
is proportional to the charging current:
I × R
1140
The voltage at ISET is nominally 1.4V at the selected
fast-charge current and falls with charging current as
the cell becomes fully charged or as the thermal-regu-
lation circuitry activates.
exposed paddle to a large copper ground plane to pro-
vide a thermal contact between the device and the cir-
cuit board for increased power dissipation. The exposed
paddle transfers heat away from the device, allowing the
IC to charge the battery with maximum current, while
minimizing the increase in die temperature.
DC Input Sources
The MAX8814 operates from a well-regulated DC
source. The full charging input voltage range is 4.25V
to 7V. The device can withstand up to 28V on the input
without damage to the IC. If V IN is greater than 7V, the
internal overvoltage-protection circuitry disables charg-
ing until the input falls below 7V. An appropriate power
supply must provide at least 4.25V at the desired peak
charging current.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8814EVKIT+ | 功能描述:电源管理IC开发工具 MAX8814 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 |
| MAX8815AETB+ | 制造商:Maxim Integrated Products 功能描述:1A 97% EFFICIENCY 30UA QUIESCENT 制造商:Maxim Integrated Products 功能描述:1A, 97% EFFICIENCY, 30?A QUIESCENT CURRENT, STEP-UP CONVERTE - Bulk |
| MAX8815AETB+T | 功能描述:直流/直流开关转换器 Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX8815AEVKIT+ | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX8815A RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8818AETM+ | 功能描述:PMIC 解决方案 10Ch PMIC for 2-Cell Li+ DVC System 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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