2014/04/17
 
 

 

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Now available at element14 - a highly efficient, configurable Solar Micro Inverter solution from Texas Instruments

Check out a solar micro-inverter solution that maximizes power output, provides real time control and performance data and delivers a safer, more reliable next generation system.

 

Key Solution Features:

  • Highly efficient, highly integrated full bridge driver for photovoltaics
  • Integrated MOSFET drivers and current sense amplifiers

Guides:

 
Featured Products
 

TMS320F2808 : 32-Bit Digital Signal Controller with Flash

Features:

  • High-Performance Static CMOS Technology
    • 100 MHz (10-ns Cycle Time)
    • 60 MHz (16.67-ns Cycle Time)
    • Low-Power (1.8-V Core, 3.3-V I/O) Design
  • JTAG Boundary Scan Support IEEE Standard 1149.1-1990 Standard Test Access Port and Boundary Scan Architecture
  • High-Performance 32-Bit CPU (TMS320C28x)
    • 16 x 16 and 32 x 32 MAC Operations
    • 16 x 16 Dual mac
    • Harvard Bus Architecture
    • Atomic Operations
    • Fast Interrupt Response and Processing
    • Unified Memory Programming Model
    • Code-Efficient (in C/C++ and Assembly)
  • On-Chip Memory
    • F2808: 64K x 16 Flash, 18K x 16 SARAM
  • Boot ROM (4K x 16)
    • With Software Boot Modes (via SCI, SPI, CAN, I2C, and Parallel I/O)
    • Standard Math Tables
  • Clock and System Control
    • Dynamic PLL Ratio Changes Supported
    • On-Chip Oscillator
    • Watchdog Timer Module
  • Any GPIO A Pin Can Be Connected to One of the Three External Core Interrupts
  • Peripheral Interrupt Expansion (PIE) Block That Supports All 43 Peripheral Interrupts
  • Endianness: Little Endian
  • 128-Bit Security Key/Lock
    • Protects Flash/OTP/L0/L1 Blocks
    • Prevents Firmware Reverse Engineering
  • Three 32-Bit CPU Timers 
  • 12-Bit ADC, 16 Channels
    • 2 x 8 Channel Input Multiplexer
    • Two Sample-and-Hold
    • Single/Simultaneous Conversions
    • Fast Conversion Rate: 160 ns - 6.25 MSPS (280x)
    • Internal or External Reference
  • Up to 35 Individually Programmable, Multiplexed GPIO Pins With Input Filtering
  • Advanced Emulation Features
    • Analysis and Breakpoint Functions
    • Real-Time Debug via Hardware
  • Development Support Includes
    • ANSI C/C++ Compiler/Assembler/Linker
    • Code Composer Studio IDE
    • DSP/BIOS
    • Digital Motor Control and Digital Power Software Libraries
  • Low-Power Modes and Power Savings
    • IDLE, STANDBY, HALT Modes Supported
    • Disable Individual Peripheral Clocks

 

Technical Documents

Functional Diagram

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AFE031 : Powerline Communications Analog Front End

 

The AFE031 is a low-cost, integrated, powerline communications (PLC) analog front-end (AFE) device that is capable of capacitive- or transformer-coupled connections to the powerline while under the control of a DSP or microcontroller. It is ideal for driving low-impedance lines that require up to 1.5 A into reactive loads. The integrated receiver is able to detect signals down to 20 µVRMS and is capable of a wide range of gain options to adapt to varying inputsignal conditions. This monolithic integrated circuit provides high reliability in demanding powerline communications applications.

The AFE031 transmit power amplifier operates from a single supply in the range of 7 V to 24 V. At maximum output current, a wide output swing provides a 12-VPP (IOUT = 1.5 A) capability with a nominal 15-V supply. The analog and digital signal processing circuitry operates from a single 3.3-V power supply.

The AFE031 is internally protected against overtemperature and short-circuit conditions. It also provides an adjustable current limit. An interrupt output is provided that indicates both current limit and thermal limit. There is also a shutdown pin that can be used to quickly put the device into its lowest power state. Through the four-wire serial peripheral interface, or SPI™, each functional block can be enabled or disabled to optimize power dissipation.

The AFE031 is housed in a thermally-enhanced, surface-mount PowerPAD package (QFN-48). Operation is specified over the extended industrial junction temperature range of –40°C to +125°C.

Features

  • Integrated Powerline Driver with Thermal and Overcurrent Protection
  • Conforms to EN50065-1
  • PRIME Certified
  • Large Output Swing: 12 VPP at 1.5 A (15-V Supply)
  • Low Power Consumption: 15 mW (Receive Mode)
  • Programmable Tx and Rx Filters
  • Supports EN50065 CENELEC Bands A, B, C, D
  • Supports FSK, S-FSK, and OFDM
  • Supports PRIME, G3, IEC 61334
  • Receive Sensitivity: 20 µVRMS, Typical
  • Programmable Tx and Rx Gain Control
  • Four-Wire Serial Peripheral Interface
  • Two Integrated Zero Crossing Detectors
  • Two-Wire Transceiver Buffer
  • 48-Pin QFN PowerPAD™ Package
  • Extended Junction Temperature Range: –40°C to +125°C

 

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SM72295 : Photovoltaic Full Bridge Driver 

 

The SM72295 is designed to drive 4 discrete N type MOSFET’s in a full bridge configuration. The drivers provide 3A of peak current for fast efficient switching and integrated high speed bootstrap diodes. Current sensing is provided by 2 transconductance amplifiers with externally programmable gain and filtering to remove ripple current to provide average current information to the control circuit. The current sense amplifiers have buffered outputs available to provide a low impedance interface to an A/D converter if needed. An externally programmable input over voltage comparator is also included to shutdown all outputs. Under voltage lockout with a PGOOD indicator prevents the drivers from operating if VCC is too low.

 

Features
  • Renewable Energy Grade
  • Dual Half Bridge MOSFET Drivers
  • Integrated 100V bootstrap diodes
  • Independent High and Low driver logic inputs
  • Bootstrap supply voltage range up to 115V DC
  • Two current sense amplifiers with externally programmable gain and buffered outputs
  • Programmable over voltage protection
  • Supply rail under-voltage lockouts with power good indicator

 

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