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


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说明

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.
MAX1645、MAX1645A:典型工作电路 MAX1645、MAX1645A:典型工作电路 放大+

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

应用

  • 笔记本电脑
  • PDA及其它手持设备
  • 销售终端机(POS)
Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/Pins
maxmax
MAX1645 
1
2
3
4
2828
I2C/SMBus
Resistor
3Smart Battery ControlSwitchmode-40 to +85
QSOP/28
MAX1645A 
2
3
4
SOIC(N)/8
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Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX1645BEVKIT: MAX1645B评估板/评估系统
MAX1645BEVSYS: MAX1645B评估板/评估系统
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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