MPPT charge controller reference design for 12-V, 24-V and 48-V solar panels
This reference design is a Maximum Power Point Tracking (MPPT) solar charge controller for 12-V and 24-V solar panels. This compact reference design targets small and medium power solar charger solutions and is capable of operating with 15- to 60-V solar panel modules, 12- or 24-V batteries and providing upwards of 20 A output current. The design uses a two-phase interleaved buck converter to step down the panel voltage to the battery voltage. The buck converter and its connected gate drivers are controlled by a microcontroller unit (MCU), which calculates the maximum power point using the perturb and observe method. The solar MPPT charge controller is created with real-world considerations, including reverse battery protection, software programmable alarms and indications, and surge and ESD protection.
- 96% efficiency in 12-V systems and 97% efficiency in 24-V systems
- Wide input voltage range: 15 V to 60 V
- High rated output current: 20A
- Battery reverse polarity, over-charge and over-discharge protections
- System over-temperature and ambient light detection capabilities
- Small board form factor: 130 mm x 82 mm x 38 mm
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Download ready-to-use system files to speed your design process.
Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
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CSD19531Q5A — 100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.4 mOhmData sheet: PDF | HTML
|*||Design guide||MPPT Charge Controller Reference Design for 12-V, 24-V and 48-V Solar Panels (Rev. A)||Jan. 15, 2020|
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