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参数资料
| 型号： | MAX8844ZETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/17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
C USB
1 μ F
USB
BATT
C BATT
2.2 μ F
4.2V Li+
SYSTEM
AC ADAPTER
IN
MAX8844Z
GND
C IN
1 μ F
DETBAT
SAFEUSB
C SAFEUSB
1 μ F
VBUS
ABI
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 3. AC Adapter Application
DC and USB Power Supplies
The MAX8844Z/MAX8844Y operate from well-regulated
DC sources and automatically select between both
input power supply connections (Table 3). 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 USB fast-
charge current is fixed at 380mA (MAX8844Z) and
450mA (MAX8844Y).
The full charging input voltage range for IN and USB is
4.25V to 7.5V. The device can withstand up to 28V on
both inputs, IN and USB, without damage to the IC. If
V IN or V USB is greater than 7.5V, the internal overvolt-
age-protection circuitry disables charging until the
input falls below 7.5V. The power supplies must provide
at least 4.25V at the desired peak charging current and
stay below 7V when unloaded.
Typical Application Circuits
AC Adapter Application
Figure 3 shows the MAX8844Z as a Li+ battery charger
with an AC adapter. The MAX8844Z detects the pres-
ence of an input supply and DETBET resulting in POK
pulled low. Once POK is pulled low, the autobooting
assistant drives ABO high and enables the power sup-
plies of the system to boot up. The MAX8844Z begins
charging the battery when EN is low or unconnected.
By monitoring CHG , the system can detect the top-off
threshold and terminate the charge through EN . The
MAX8844Z also provides an overvoltage-protected
SAFEOUT and SAFEUSB to the system.
Factory System Interface Connector Application
Figure 4 shows the MAX8844Z as an autoboot assistant
with the factory system interface connector. The
MAX8844Z detects the ABI input even though there is
no input voltage available and drives ABO high to turn
12
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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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