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参数资料
| 型号： | MAX8844ZETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/17页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI+ DUAL 14TDFN |
| 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）、锂聚合物（Li-Pol） |
| 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： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX8844ZETD+TDKR |
28V Dual Input Linear Li+ Battery Chargers with
Battery Detection and Overvoltage-Protected Output
USB
BATT
C USB
1 μ F
MAX8844Z
C BATT
2.2 μ F
SYSTEM
4.2V
INTERFACE
CONNECTOR
C IN
R ABI 1 μ F
10k Ω
IN
ABI
DETBAT
SAFEUSB
C SAFEUSB
1 μ F
VBUS
GND
C ABI
1 μ F
SAFEOUT
C SAFEOUT
1 μ F
V I/O
VCHG
R CHG
1M Ω
ABO
SETI
CHG
R POK
1M Ω
GPIO
R SETI
2.8k Ω
MIN
GND
EP
POK
EN
GPIO
GPIO
R MIN
1.75k Ω
POWER
SUPPLY
IF THE POWER SUPPLY
IS ACTIVE-LOW ENABLED,
USE THE MAX8844Y.
ON
Figure 4. Factory System Interface Connector Application
on power supplies to boot up the system. The configu-
ration in Figure 4 is used for system development, test-
ing, and calibrations in production or design stage.
USB-Powered Li+ Charger
The universal serial bus (USB) provides a high-speed
serial communication port as well as power for the
remote device. The MAX8844Z can be configured to
charge a battery at the highest current possible from
the host port. Figure 5 shows the MAX8844Z as a USB
battery charger with the default charging current as
380mA. The MAX8844Z also provides an overvoltage
protected SAFEUSB to the system.
USB Connector and AC Adapter
Figure 6 shows the MAX8844Z as a Li+ battery charger
with an AC adapter and USB connector. The
MAX8844Z detects the presence of input supplies and
DETBET resulting in POK pulled low. Once POK is
pulled low, the autobooting assistant drives ABO high
and enables the power supplies of the system to boot
up. The MAX8844Z begins charging the battery from IN
source when EN is low or open. By monitoring CHG ,
the system can detect the top-off threshold and termi-
nate the charge through the EN pin. The MAX8844Z
provides overvoltage protected SAFEOUT and
SAFEUSB to the system.
Figure 7 shows the timing diagram.
Recommended PCB Layout and Routing
Place all bypass capacitors for IN, USB, BATT, SAFEOUT,
and SAFEUSB as close to the device as possible.
Connect the battery to BATT as close as possible to the
device to provide accurate battery voltage sensing.
Provide a large copper ground plane to allow the
exposed pad to sink heat away from the device. Make all
high-current traces short and wide to minimize voltage
drops. A sample layout is available in the MAX8844Z eval-
uation kit to speed designs.
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX8845WETC+ | 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 |
| MAX8845WETC+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 |
| MAX8845XETC+ | 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 |
| MAX8845XETC+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 |
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