SM3320-BATT-EV Charge Controller Reference Design


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The 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.

  • 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

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SolarMagicâ„¢ SM3320-BATT-EV Charge Controller Reference Design



TI Devices (7)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
SM72238  Micropower Voltage Regulators  Linear Regulator (LDO)  Sample & Buy Not Available
SM72240  5-Pin Microprocessor Reset Circuit  Power Management  Sample & Buy Not Available
SM72295  3A Full Bridge Gate Driver with integrated Current Sense Amplifier SM72295  MOSFET and IGBT Gate Drivers  Sample & Buy View Design Kits & Evaluation Modules
SM72375  Dual Micro-Power Rail-to-Rail Input CMOS Comparator with Open Drain Output  Amplifiers  Sample & Buy Not Available
SM72442  Programmable Maximum Power Point Tracking Controller for Photovoltaic Solar Panels  Buck/Boost, Inverting or Split-Rail  Sample & Buy Not Available
SM72480  1.6V, LLP-6 Factory Preset Temperature Switch and Temperature Sensor  Temperature Sensors  Sample & Buy Not Available
SM72485  100V, 150 mA Constant On-Time Buck Switching Regulator  Step-Down (Buck)  Sample & Buy Not Available

Technical Documents
Application notes (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1207 06 May 2013 657
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