TIDA-010042
MPPT charge controller reference design for 12-V, 24-V and 48-V solar panels
TIDA-010042
Overview
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.
Features
- 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
Design files
Download ready-to-use system files to speed your design process.
TIDUEJ8A.PDF (5260 K)
Reference design overview and verified performance test data
TIDRYU8.PDF (601 K)
Detailed schematic diagram for design layout and components
TIDRYU9.PDF (93 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRYV0.PDF (321 K)
Detailed overview of design layout for component placement
TIDRYV2.ZIP (2093 K)
Files used for 3D models or 2D drawings of IC components
TIDCF96.ZIP (322 K)
Design file that contains information on physical board layer of design PCB
TIDRYV1.PDF (1700 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MSP430 microcontrollers
MSP430F5132 — 25 MHz MCU with 8KB Flash, 1KB SRAM, 10-bit ADC, comparator, DMA, 16-bit High Resolution timer
Data sheet: PDF | HTMLN-channel MOSFETs
CSD18540Q5B — 60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 2.2 mOhm
Data sheet: PDF | HTMLN-channel MOSFETs
CSD19531Q5A — 100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.4 mOhm
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | 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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