Solar MPPT Charge Controller Reference Design

(ACTIVE) TIDA-00120

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Key Document

Description

This design is a 20A Maximum Power Point Tracking (MPPT) solar charge controller created for solar panel inputs corresponding to 12V and 24V panels. The design is targeted for small and medium power solar charger solutions and is capable of operating with 12V/24V panels and 12V/24V batteries up to 20A output current. Designed with scalability in mind, it can easily be adapted to a 48V system by changing the MOSFETs to 100V rated parts. The user can also increase the current to 40A by using the TO-220 package version of same MOSFETs used currently. The Solar MPPT Charge Controller was created with real world considerations, including reverse battery protection and software programmable alarms and indications provided in hardware but were left non-configured. The design has an operating efficiency of above 97% at full load in a 24V system. For 12V systems the efficiency is above 96% and includes losses in the reverse battery protection MOSFETs.

Features
  • More than 96% efficiency at full load in 12V and 24V systems
  • Supports Wide Input Voltage Range: 15VDC - 44VDC
  • Flexible design supports both 12V or 24V solar panels
  • Output Current: 20A max
  • Small Board Form Factor: 130 mm x 84 mm x 22 mm

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Schematic/Block Diagram

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Bill of Materials (BOM)

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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18502Q5B  40-V, N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy Not Available
CSD18532Q5B  60-V, N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
INA271  80V, Low-/High-side, High-Speed, Voltage Output Current Sense Amplifier  Current sense amplifiers  Sample & Buy Not Available
LM5019  7.5-100V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5132  25MHz MCU with Two 16-bit High Res Timers, 8KB flash, 1KB RAM, 10-bit ADC, 16-channel Comparator  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
SM72295  3A Full Bridge Gate Driver with integrated Current Sense Amplifier SM72295  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules
TLV704  24V Input Voltage, 150mA, Ultra-Low-Iq Low-Dropout (LDO) Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18532Q5B VSON-CLIP (DNK)| 8 Download -
INA271 Download Download
LM5019 Download Download
Download Download
MSP430F5132 Download -
Download -
Download Download
SM72295 Download Download
TLV704 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1350 29 Jan 2014 0
Design files (2)
Title Abstract Type Size (KB) Date Views
ZIP 28 29 Jan 2014 0
PDF 54 29 Jan 2014 0
Related Tools & Software

Software (2)



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