MPPT charge controller reference design for 12-V, 24-V and 48-V solar panels
TIDA-010042
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Key Document
Description
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
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Schematic/Block Diagram
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Design Guide
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TI Devices (13)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| CSD18540Q5B |
60V, N ch NexFET MOSFET™, single SON5x6, 2.2mOhm |
MOSFETs |
Sample & Buy |
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| CSD19531Q5A |
100V, N ch NexFET MOSFET™, single SON5x6, 6.4mOhm |
MOSFETs |
Sample & Buy |
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| INA240 |
-4 to 80V, bidirectional, ultra-precise current sense amplifier with enhanced PWM rejection |
Current sense amplifiers |
Sample & Buy |
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| LM5009 |
9.5-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator |
Step-down (buck) regulators |
Sample & Buy |
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| LM5109 |
100V / 1A peak half bridge gate driver |
Gate drivers |
Not Available |
Not Available |
| MSP430F5132 |
25 MHz MCU with 8KB FLASH, 1KB SRAM, 10-bit ADC, Comparator, DMA, 16-bit High Resolution Timer |
Microcontrollers (MCU) |
Sample & Buy |
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| OPT3001 |
Digital ambient light sensor (ALS) with high-precision human-eye response |
Specialty sensors |
Sample & Buy |
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| TLV704 |
150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator |
Power management |
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| TMP303 |
Factory Programmed Temperature Window Comparator |
Temperature sensors |
Sample & Buy |
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| TPD1E10B06 |
Single-channel ESD in 0402 package with 10pF capacitance and 6-V breakdown |
Circuit protection ICs |
Sample & Buy |
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| TPD2E007 |
2-channel ESD protection array for AC signal data interface |
Circuit protection ICs |
Sample & Buy |
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| TVS3300 |
33-V flat-clamp surge protection device |
Circuit protection ICs |
Sample & Buy |
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| UCC27517 |
4-A/4-A single-channel gate driver with 5-V UVLO and 13-ns prop delay in SOT-23 package |
Gate drivers |
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CAD/CAE symbols
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Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
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Technical documentation
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User guides (1)
| Title | Type | Size (KB) | Date |
| | PDF | 5260 |
15 Jan 2020
|
Design files (6)
| | ZIP | 322 |
29 Jan 2019
|
| | ZIP | 2093 |
29 Jan 2019
|
| | PDF | 1700 |
29 Jan 2019
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| | PDF | 321 |
29 Jan 2019
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| | PDF | 93 |
29 Jan 2019
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| | PDF | 601 |
29 Jan 2019
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