Central Inverter System

Central inverters convert the DC voltage from "strings" of photovoltaic (PV) panels to AC voltage and are used in residential, commercial and utility scale systems with power levels of 1kW or higher. The maximum power point tracking (MPPT) for the PV panels is performed centrally at the DC-AC inverter stage.

 

Central Maximum Power Point Tracking System (C-MPPT)

 

In the central-MPPT systems, PV modules are connected in combinations of series and parallel configurations.

The PV modules connected in series are called “strings.” MPPT can be performed at the system level or at the string level. The output voltage of each string can be between 150V and 1000VDC. In order to generate the peak grid voltage, these systems need a boost step (converter or transformer), which is performed at the output of the string. Single-stage inverters (using full-bridge or neutral-point clamp topologies) achieve higher efficiency, less system cost, better efficiency and longer lifetime.

Design Advantages

  • IGBTs and MOSFETs featuring high current handling capability and low conduction and switching loss.
  • Optically isolated gate drivers with wide operating voltage range and high common-mode transient immunity.
  • High-voltage gate drivers with excellent noise immunity, high dv/dt and low power consumption.
  • Optimized for Solar Inverter, UPS, Welder and SMPS (Switch Mode Power Supply) applications, Fairchild broad family of IGBTs offer low VSAT and EOFF, and enable systems to achieve high efficiency with less EMI and better control.
  • Our mWattSaver fly back controllers provide auxiliary bias power supplies with industry-lowest standby power consumption.
Application NoteDescription
AN-6208Secondary-Side Synchronous Rectifier (SR) for LLC Resonant Converter Using FAN6208
AN-6067Design and Application of Primary-Side Regulation (PSR) PWM Controller
AN-4150Design Guidelines for Flyback Converters Using FSQ-Series Fairchild Power Switch (FPS™)
AN-6206Primary-Side Synchronous Rectifier (SR) Trigger Solution for Dual-Forward Converter
AN-9017Manufacturing Technology of a Small Capacity Inverter Using a Fairchild IGBT
AN-9034Power MOSFET Avalanche Guideline
AN-8022TinyCalc™ Users Guide
AN-6069Application Review and Comparative Evaluation of Low-Side Gate Driver
AN-400ALow-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback
AN-7019Limiting Cross-Conduction Current in Synchronous Buck Converter Designs
AN-6083Highly Integrated, Dual-PWM Combination Controller
AN-6076Design and Application Guide of Bootstrap Circuit for High-Voltage Gate-Drive IC
AN-6086Design Consideration for Interleaved Boundary Conduction Mode PFC Using FAN9611 / FAN9612
AN-4151Half-Bridge LLC Resonant Converter Design Using FSFR-Series Fairchild Power Switch (FPS™)
AN-9725Robust Body Diode Characteristics of the Latest Power MOSFETs, UniFET™ II for Resonant Converters
AN-7536FCS Fast Body Diode MOSFET for Phase-Shifted ZVS PWM Full Bridge DC/DC Converter
AN-5077Design Considerations for High Power Module (HPM)
AN-4167Mounting Guideline for F1 / F2 Modules with Press-Fit Pins
AN-7017Reducing Power Losses in MOSFETs by Controlling Gate Parameters
AN-8024Applying Fairchild Power Switch (FPS™) FSBH-series to Standby Auxiliary Power Supply
AN-4153Designing Asymmetric PWM Half-Bridge Converters with a Current Doubler and Synchronous Rectifier using FSFA-Series Fairchild Power Switches (FPS™)
AN-7517Practical Aspects of Using PowerMOS Transistors to Drive Inductive Loads
AN-4145Electromagnetic Compatibility for Power Converters
AN-9007High Performance 1200V PT IGBT with Improved Short-Circuit Immunity
AN-7512Parallel Operation Of Insulated Gate Transistors
AN-7531Implementing A Primary Side Peak-Current-Mode Half-Bridge Converter
AN-6753Highly Integrated Green-Mode PWM Controller
AN-7505Improved IGBTs with Fast Switching Speed And High-Current Capability
AN-6003"Shoot-through" in Synchronous Buck Converters