SM3320-BATT-EV参考设计

GY@艳

SM3320-BATT-EV参考设计作用于充电控制器。该参考设计使用设备包括SM72295和SM72442。该SM72442 MPPT数字控制器和SM72295光伏全桥驱动器，设计用于控制高效率光伏应用中使用的DC/ DC转换。DescriptionThe SM72442 MPPT digital controller and SM72295 photovoltaic full bridge drivers are designed to control high efficiency DC/DC conversion used in photovoltaic applications. This application note will detail the usage of those devices in a battery charging application. The reference design is meant to provide support for a wide variety of implementations, however, unless otherwise noted, this reference design system is shown charging a 12V commercial automotive lead acid battery. If the battery voltage is very low, a slow charge current is applied and limited until the voltage rises above a pre-set threshold value Vt. The full charge current is then applied. Once full charge is detected on the voltage of the battery, the system switches to a floating charge and maintains the battery voltage at a fixed threshold. At any time, the system will run in MPPT mode if the available power is lower than the power required to achieve voltage or current regulation. Features

       

• 12V Lead Acid Battery       
  
• Vin range = 15V to 45V Vmp (50V Voc)       
  
• Max Input Current: Isc = 11A       
  
• MPPT algorithm for optimized photovoltaic applications       
  
• Up to 9A charging current       
  
• Reverse current protection       
  
• Trickle charge and fast charge mode       
  
• Up to 98% converter efficiency       
  
• 14.2V max charge voltage, 13.5V floating voltage       
  
• Output voltage set-points can be re programmed