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 (6)

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 regulator  Power management  Sample & Buy Not Available
SM72240  5-pin microprocessor reset circuit  Power management  Not Available Not Available
SM72295  3-A, 100-V full bridge gate driver with Integrated current sense amplifier  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules
SM72442  Programmable Maximum Power Point Tracking Controller for Photovoltaic Solar Panels  Buck-boost & inverting regulators  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) regulators  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
SM72238 Download Download
SM72240 Download Download
SM72295 Download Download
SM72442 Download Download
SM72480 Download Download
SM72485 Download Download
Download Download

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Technical documentation
Application notes (1)
Title Type Size (KB) Date
PDF 1207 06 May 2013
Design files (1)
Title Type Size (KB) Date
ZIP 3984 27 Jan 2012
More literature (2)
Title Type Size (KB) Date
PDF 39 02 Jan 2019
PDF 38 02 Jan 2019

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