KIT34671EPEVBE评估板

ladou

KIT34671EPEVBE评估套件采用MC34671，这是一个符合成本效益的完全集成的锂离子或锂聚合物电池充电器。它容忍高达28V的输入电压，从而消除了在手持设备所需的输入过电压保护电路。一个充电周期包括涓流，恒流（CC）和恒压（CV）充电模式。The constant-current (CC) is programmable up to 600mA, with an external resistor.The constant voltage is fixed at 4.2V. The trickle charge current is preset to 20% of the CC current when the battery voltage is lower than the trickle-charge threshold. The end-of-charge (EOC) current threshold is preset to 10% of the CC current to save board space and cost. A charge-current thermal foldback feature limits the charge current when the IC internal temperature rises to a preset threshold.The MC34671 has a 2.6V falling power-on-reset (POR) threshold, making it perfect to work with current-limited power supplies. Three indication pins (PPR, CHG, and FAST) can be simply interfaced to a microprocessor or LEDs. When no power supply is connected, or when disabled, the charger draws less than 1.0µA leakage current from the battery.
Features

       

•  No external MOSFET, reverse-blocking diode, or current-sense resistor are required       
  
•     Guaranteed maximum 600mA programmable charge current       
  
•     ±0.7% voltage accuracy over -20°C to 70°C       
  
•     ±5% current accuracy over -40°C to 85°C       
  
•     28V maximum voltage for the power input with 11V over-voltage protection threshold       
  
•     2.6V minimum input operating voltage       
  
•     Trickle charge for fully discharged batteries       
  
•     Charge current monitor       
  
•     Charge current thermal foldback