MAX1645A:高级、与化学类型无关的Level 2电池充电器,带有输入限流

SMBus™总线控制,具有输入限流及安全定时器,为各种化学类型的电池提供智能充电

The MAX1645 is a high-efficiency battery charger capable of charging batteries of any chemistry type. It uses the Intel® System Management Bus (SMBus™) to control voltage and current charge outputs. When charging lithium-ion (Li+) batteries, the MAX1645 automatically transitions from regulating current to regulating voltage. The MAX1645 can also limit line input current so as not to exceed a predetermined current drawn from the DC source. A 175sec charge safety timer prevents "runaway charging" should the MAX1645 stop receiving charging voltage/current commands. The MAX1645 employs a next-generation synchronous buck control circuitry that lowers the minimum input-to-output voltage drop by allowing the duty cycle to exceed 99%. The MAX1645 can easily charge one to four series Li+ cells.

关键特性
  • Input Current Limiting
  • 175sec Charge Safety Timeout
  • 128mA Wake-Up Charge
  • Charges Any Chemistry Battery: Li+, NiCd, NiMH, Lead Acid, etc.
  • Intel SMBus 2-Wire Serial Interface
  • Compliant with Level 2 Smart Battery Charger Spec. Rev. 1.0
  • +8V to +28V Input Voltage Range
  • Up to 18.4V Battery Voltage
  • 11-Bit Battery Voltage Setting
  • ±0.8% Output Voltage Accuracy with Internal Reference
  • 3A max Battery Charge Current
  • 6-Bit Charge Current Setting
  • 99.99% max Duty Cycle for Low-Dropout Operation
  • Load/Source Switchover Drivers
  • >97% Efficiency
功能框图
MAX1645、MAX1645A:典型工作电路
产品应用
  • 笔记本电脑
  • PDA及其它手持设备
  • 销售终端机(POS)
关键参数
Part NumberProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/Pins
max
MAX16452828
I2C/SMBus
Resistor
3Smart Battery ControlSwitchmode-40 to +85
QSOP/28
MAX1645A
QSOP/28
数据手册DataSheet
英文MAX1645-MAX1645A.pdfRev 2; 12/2001
开发工具
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1645AEEI最后一次购买MAX1645AEEI+QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:否
MAX1645AEEI+生产中QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1645AEEI+T生产中QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1645AEEI-T最后一次购买MAX1645AEEI+TQSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:否
MAX1645AEVKIT停止供货KIT;参考数据资料
MAX1645AEVSYS停止供货参考数据资料
MAX1645-MAX1645A.pdf MAX1645A
Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient MAX1772
Battery Chargers Fulfill System Power Requirements and Charge Batteries MAX1772
MAX1645A.pdf MAX1645A
MAX1645-MAX1645A.pdf MAX1645A