MAX1772

低成本、多种化学类型电池充电器电路

精度为0.7%的输入限流、多化学类型电池充电器,提供完备的解决方案


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说明

The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification.

Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.

The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.
MAX1772:引脚配置 MAX1772:引脚配置 放大+

关键特性

  • Input Current Limiting
  • ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C)
  • Programmable Battery Charge Current >4A
  • Analog Inputs Control Charge Current and Charge Voltage
  • Monitor Outputs for:
    • Current Drawn from AC Input Source
    • Charging Current
    • AC Adapter Present
  • Up to 18.2V (max) Battery Voltage
  • 8V to 28V Input Voltage
  • >95% Efficiency
  • 99.99% (max) Duty Cycle for Low-Dropout Operation
  • Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.

应用

  • 手持式终端
  • 笔记本电脑和亚笔记本电脑
  • PDA及其它手持设备
Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX1772 
2
3
4
2828
Analog Input
Resistor
4External ControlSwitchmode-40 to +85
QSOP/28
$6.53 @1k
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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。


MAX1772EVKIT: MAX1772评估板
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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相关资料


MAX17823B
12-Channel High-Voltage Data Acquisition System

  • AECQ-100 Grade 2 Temperature Range
    • -40°C to +105°C
  • Operating Voltage from 9V to 65V
  • Ultra-Low-Power Operation
    • Standby Mode: 2mA
    • Shutdown Mode: 2μA


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    评估板2431MAX1772EVKIT MAX1772评估板