参数资料
型号: MAX8845WETC+
厂商: Maxim Integrated Products
文件页数: 7/19页
文件大小: 0K
描述: IC BATT CHARGER CCCV 28V 12TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 100
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: 12-WFQFN 裸露焊盘
供应商设备封装: 12-TQFN 裸露焊盘(3x3)
包装: 管件
28V Linear Li+ Battery Chargers with Battery
Detection and Overvoltage Protected Output
LINEAR
REGULATOR
SAFEOUT
WITH OVP
4.2V Li+
(4.35V FOR
IN
SETI
V REF
I MINREF
OUTPUT DRIVER,
CURRENT SENSE,
AND LOGIC
V REF
+115 ° C
TEMPERATURE
SENSOR
BATT
DETBAT
V I/O
MAX8845W ONLY)
MIN
IN
CHG
V IN
OVLO
BATT
VL
REGULATOR
POK
V L
POK
BATT
DETBAT
MAX8845Z
MAX8845Y
VL
UVLO
REF
REFOK
V REF
LOGIC
200k ?
ABO (MAX8845Z ONLY)
ABI
ABO (MAX8845Y/MAX8845X/MAX8845W)
EN
MAX8845X
MAX8845W
GND
EP
200k ?
Figure 1. MAX8845Z/MAX8845Y/MAX8845X/MAX8845W Functional Diagram
Detailed Description
The MAX8845Z/MAX8845Y/MAX8845X/MAX8845W
chargers use voltage, current, and thermal-control
loops to charge a single Li+ cell and protect the battery
(Figure 1). When a Li+ battery with a cell voltage below
2.5V is inserted, the MAX8845Z/MAX8845Y/MAX8845X/
MAX8845W chargers enter a prequalification stage
where it precharges that cell with 10% of the user-pro-
grammed fast-charge current (Figure 2). The CHG indi-
cator is driven low to indicate entry into the prequalifi-
cation state. When the battery voltage exceeds 2.5V,
the charger soft-starts as it enters the fast-charge
stage. The fast-charge current level is programmed
through a resistor from SETI to GND. As the battery
voltage approaches 4.2V, the charging current is
reduced. If the battery current drops to less than the
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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
MAX8845YETC+ 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