参数资料
型号: MAX8819CETI+T
厂商: Maxim Integrated Products
文件页数: 17/29页
文件大小: 0K
描述: IC PMIC W/INT CHARGER 28TQFN-EP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
应用: 手持/移动设备
电源电压: 4.1 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(4x4)
包装: 带卷 (TR)
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
TOP-OFF
PREQUALIFICATION
FAST-CHARGE
(CONSTANT CURRENT)
FAST-CHARGE
(CONSTANT VOLTAGE)
DONE
V BATREG
V BATPRQ
I CHGMAX
I PREQUAL
I TOPOFF
0
HIGH
IMPEDANCE
LOW
Figure 2. Li+/Li-Poly Charge Profile
Battery Charger
Figure 2 shows the typical Li+/Li-Poly charge profile for
the MAX8819_, and Figure 3 shows the battery charger
state diagram.
With a valid DC input that is not suspended, the battery
charger initiates a charge cycle once CEN is driven
high. It first detects the battery voltage. If the battery
voltage is less than the prequalification threshold
(3.0V), the charger enters prequalification mode and
charges the battery at 10% of the maximum fast-charge
current while deeply discharged. Once the battery volt-
age rises to 3.0V, the charger transitions to fast-charge
mode and applies the maximum charge current. As
charging continues, the battery voltage rises until it
approaches the battery regulation voltage (4.2V typ)
______________________________________________________________________________________
17
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