TIDA-00121

Solar Street Light with Integrated MPPT Charger Reference Design

TIDA-00121

Design files

Overview

This design is a 12A Maximum Power Point Tracking (MPPT) solar charge controller with a 700mA LED driver. It is targeted for low power solar charger and LED driver solutions such as solar street lights. This design is capable of charging 12V batteries with up to 10A output current from 12V panels. However, it can be easily adapted to 24V systems by just changing the MOSFETs to 60V rated parts. Also, the design can drive up to 15 LEDs in series with 700mA of current. It is possible to adapt the design for LED currents up to 1.1A with minimum change in hardware. TI provides a complete solar inverting system for low power loads. Additionally this design takes real world considerations in to account, such as reverse battery protection, built-in battery charge profile for 12V Pb-acid batteries, and a highly efficient design. Together these provide new market entrants and faster time to market for their design.

Features
  • High efficiency: >95% for MPPT charger and >90% for LED driver
  • Supports 15VDC - 22VDC Input Voltage Range
  • Built in charge profile for 12V Pb-acid battery
  • Flexible design adapts to 24V panels by only changing to 60V MOSFETs
  • Capable of driving upto 15 LEDs with 700mA current
  • Board Form Factor: 100 mm x 45 mm x 32 mm

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU220.PDF (1318 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR395.PDF (48 K)

Detailed schematic diagram for design layout and components

TIDR396.ZIP (28 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRWI3.ZIP (797 K)

Files used for 3D models or 2D drawings of IC components

TIDC275.ZIP (268 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

Half-bridge drivers

LM251013-A, 2-A or 1-A half bridge gate driver with 8-V UVLO and TTL inputs

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TLV704150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Low-side drivers

UCC275174-A/4-A single-channel gate driver with 5-V UVLO and 13-ns prop delay in SOT-23 package

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430F513225 MHz MCU with 8KB Flash, 1KB SRAM, 10-bit ADC, comparator, DMA, 16-bit High Resolution timer

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18533Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.9 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18534Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML

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Software

Support software

TIDA-00121 — TIDCEQ3.ZIP (178 K)

Technical documentation

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* Test report TIDA-00121 Test Results Jan. 29, 2014

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