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Avnet Electronics Marketing Boosts Solar Energy Conversion with Products from STMicroelectronics
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Avnet Electronics Marketing Boosts Solar Energy Conversion with Products from STMicroelectronics

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Avnet Electronics Marketing illustrates way to improve solar energy converstion with solar diodes and solar MPPT boosters from STMicroelectronics.

Avnet Electronics Marketing illustrates way to improve solar energy converstion with solar diodes and solar MPPT boosters from STMicroelectronics.

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  • 1. ST Microelectronics Solar Diodes Solar MPPT Booster Available from Avnet Electronics Marketing www.avnetexpress.com
  • 2. Boosting solar energy conversion
  • 3. Improving solar energy conversion
    • At junction box or panel level  cool bypass switch
    • At photovoltaic array level  solar energy booster
    Load Inverter Meter AC grid Photovoltaic array Junction box
  • 4. More efficient solar energy conversion
    • New approach to renewable energy based 100% on ST’s proprietary
    • IPs and technologies for:
    • At junction-box level
      • Minimized power dissipation and leakage currents
      • Improved reliability and maximized lifetime
    • At photovoltaic-panel array level
      • Minimized shadowing impact on power generation
      • Minimized panel mismatch
      • Improved inverter efficiency
      • Panel diagnosis using remote monitoring and control functions
  • 5. Cool bypass switch (CBS)
    • System in package
    • Embedded power MOSFET
    • Very low forward-voltage drop
    • Very low reverse leakage current
    Key features Main benefits
    • Cooler than Schottky diodes
    • Low power dissipation
    • Longer lifetime
    • Higher reliability
    (1) CBS available in different packages TO-220 D2PAK TO-220 AC MLPD 5x6 (1) (2) (2) CBS in MLPD package: very low profile (less than 1mm) to laminate device directly on the panel
  • 6. Cool bypass switch (CBS)
    • CBS versus standard Schottky diodes
    PV panel + - Junction box Hot spot Standard Schottky diode Cathode Anode Cool bypass switch Cathode Anode
  • 7. Cool bypass switch (CBS)
    • CBS vs standard Schottky diodes: power dissipation in forward biasing
    Note: acquisitions made at steady state Standard Schottky diode Cool bypass switch Biasing Current [A] 0 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 Power Dissipation [W]
  • 8. Cool bypass switch (CBS)
    • CBS vs standard Schottky diodes: leakage current in reverse polarity
    Note: acquisitions made at steady state Cool bypass switch Standard Schottky diode 0.001 0.01 0.1 1 10 100 1000 5 10 15 20 25 30 35 40 Reverse Voltage [V] Leakage Current [mA] 125 °C 115 °C 105 °C 95 °C 85 °C
  • 9. Cool bypass switch (CBS)
    • CBS versus standard Schottky diodes: heat dissipation compared at ambient temperature, without dissipation tools
    Note: acquisitions made at steady state Standard Schottky diode 5 A 6 A 7 A 8 A Cool bypass switch Standard Schottky diode Cool bypass switch
  • 10. Solar energy booster
    • Removes need for centralized power conversion, moving part of the electronics from the inverter to the panel
    Solar energy booster Standard PV panel Anti islanding DC-AC converter DC-DC converter MPPT inverter anti-islanding control control control Inverter basic architecture + - electronic parts centralized at inverter level + - Boost + MPPT Boost + MPPT Boost + MPPT distributed architecture DC-DC and MPPT at single cell-string level
  • 11. Solar energy booster
    • Monolithic power converter embedded in the panel
      • Breakthrough device allows distributed architecture: one or more power converters integrated on the panel
      • MPPT implemented at single cell-string level
    • MPPT computed for each cell string
      • Maximized power extracted from a single cell string
      • Boosted overall efficiency of the photovoltaic system
    • Maximum power point tracker (MPPT) algorithm
      • Maximizes solar DC power from the PV panels under any temperature and radiation conditions (shadowing, panel performance mismatch, thermal gradient, etc.)
      • Tracks power-output changes from the PV modules and maintains continuous grid connectivity
    • Panel diagnostics using remote monitoring and control function
    Key features Main benefits Solar energy booster demonstration board
  • 12. Improving photovoltaic technology Main benefits Cool bypass switch Solar energy booster
    • Reduced power dissipation
    • Cooler device
    • Smaller and lighter junction box
    • Higher reliability
    • Longer lifetime
    • Maximized efficiency of the photovoltaic system
    • Extra energy production
    • Higher reliability: fewer devices, lower failure rate
    • Panel diagnostics: remote monitoring and control

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