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Power conversion system (PCS)

Products and reference designs
Block diagram

Power conversion system (PCS)

Block diagram

Overview

Our integrated circuits and reference designs help you create a smarter and more efficient power conversion system (PCS) that sits between the grid or PV panels and the energy storage battery packs. Whether it is an AC/DC, DC/AC or DC/DC stage design, we have the right circuits to develop an efficient power conversion system.

Design requirements

Power conversion system (PCS) designs often require:

  • Accurate measurements of voltage, current and temperature.
  • Modular fail-safe power stage designs.
  • High efficiency and power density.
  • Real-time monitoring, identifying and rectifying faults.

Block diagram

Find products and reference designs for your system.

Power conversion system (PCS)

Bat- Bat- Bat+ Bat+ VAC VAC Isolated System Voltages IsolatedSystem Voltages Non-Isolated System Voltages Non-IsolatedSystem Voltages Wired Interface Wired Interface CAN CAN Ethernet Ethernet RS-485 RS-485 DC/DC Power Digital Processing DC/DC Power Digital Processing MCU MCU RTC RTC DC/AC Analog Front-End DC/ACAnalog Front-End Reference Reference ADC ADC DC/AC Power Digital Processing DC/AC Power Digital Processing MCU MCU RTC RTC DC/AC Power Logic DC/AC Power Logic Gates and Buffers Gates and Buffers Host Wireless Interface Host Wireless Interface WiFi WiFi Host Logic Host Logic Gates and Buffers Gates and Buffers VDC+ VDC+ VDC- VDC- Isolated AC/DC Power Supply Isolated AC/DC Power Supply Isolated AC/DC Isolated AC/DC Input Power Protection Input Power Protection eFuse eFuse Non-Isolated DC/DC Power Supply Non-Isolated DC/DC Power Supply DC/DC DC/DC DC/DC VTT DC/DC VTT Isolated DC/DC Power Supply Isolated DC/DC Power Supply Isolated DC/DC Isolated DC/DC DC/DC Backup Power Supply DC/DC Backup Power Supply Flyback Converter Flyback Converter Self-Diagnostics/ Monitoring Self-Diagnostics/Monitoring Temperature Sensor TemperatureSensor Analog Front-End Analog Front-End Reference Reference ADC ADC Energy Storage Host Controller Digital Processing Energy Storage Host Controller Digital Processing MCU MCU RTC RTC Memory Memory Data Isolation Data Isolation Data Isolation Data Isolation Output User Interface OutputUser Interface LCD Controller LCD Controller LED Driver LED Driver Input User Interface InputUser Interface IO Expansion IO Expansion DC/DC Analog Front-End DC/DC Analog Front-End Reference Reference ADC ADC DC/DC Power Logic DC/DC Power Logic Gates and Buffers Gates and Buffers DC/DC Output Current and Voltage Sense DC/DC Output Current and Voltage Sense Current Sensor Current Sensor AMP AMP AMP AMP Bi-Directional DC/DC Converter Bi-DirectionalDC/DC Converter Power FET/IGBT Power FET/IGBT Gate Drivers Gate Drivers DC/DC Input Current and Voltage Sense DC/DC Input Current and Voltage Sense Current Sensor Current Sensor AMP AMP AMP AMP DC Relay Power Stage DC Relay Power Stage Relay Relay Relay Driver Relay Driver Phase 3 Phase 3 Phase 2 Phase 2 AC Relay Power Stage AC Relay Power Stage Relay Driver Relay Driver Relay Relay Phase 1 Phase 1 Phase 3 Phase 3 Phase 2 Phase 2 DC/AC Output Current and Voltage Sense DC/AC Output Current and Voltage Sense Current Sensor Current Sensor AMP AMP Phase 1 Phase 1 AMP AMP Phase 3 Phase 3 Phase 2 Phase 2 Grid Current and Voltage Sense Grid Current and Voltage Sense Current Sensor Current Sensor AMP AMP Phase 1 Phase 1 AMP AMP Phase 3 Phase 3 Phase 2 Phase 2 Bi-Directional DC/AC Inverter Bi-DirectionalDC/AC Inverter Power FET/IGBT Power FET/IGBT Gate Drivers Gate Drivers Phase 1 Phase 1

Isolated AC/DC power supply

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The internal electronics of a stationary energy storage system require a number of separate voltage rails. MCUs and other digital controllers will typically run at 3.3V, some digital processors operate at however voltages like 1.2V, analog circuitry will need accurate low noise reference voltages, and power FETs and relays can require anywhere from 5-15V to turn on.

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Power management (10)
AC/DC & DC/DC controllers (external FET)
  • UCC28C55—Industrial, 30-V, low-power current-mode PWM controller, 8.4-V/7.6-V UVLO, 50% duty cycle
    Data sheet: PDF | HTML
  • UCC28C52—Industrial, 30-V, low-power current-mode PWM controller, 14.5-V/9-V UVLO, 100% duty cycle
    Data sheet: PDF | HTML
  • UCC28750—Current-mode flyback controller with secondary-side regulation (SSR) for offline applications
    Data sheet: PDF | HTML
  • UCC28C53—Industrial, 30-V, low-power current-mode PWM controller, 8.4-V/7.6-V UVLO, 100% duty cycle
    Data sheet: PDF | HTML
  • UCC24612—High-frequency multi-mode synchronous rectifier controller
    Data sheet: PDF | HTML
  • UCC28730-Q1—Zero-power standby PSR flyback controller for automotive
    Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)
  • UCC28881—700-V Lowest Quiescent current off-line switcher
    Data sheet: PDF | HTML
  • UCC28910—700V Flyback switcher with constant-voltage constant-current and primary-side control
    Data sheet: PDF | HTML
Isolated power modules (integrated transformer)
  • UCC33420—5V/5V 1.5W 3kVrms isolated DC-DC module with integrated transformer
    Data sheet: PDF | HTML
  • DCH010505S—Miniature, 1W, 3kVDC Isolated DC/DC Converters
    Data sheet: PDF | HTML
  • PMP10783—AC/DC Buck Converter with 85VAC - 318VAC Input and 15V at 0.8A Output Reference Design
    Test report: PDF Schematic: PDF
  • PMP10833—85-318Vin, 15Vout, 1Aout, AC-DC Buck Converter Reference Design
    Test report: PDF Schematic: PDF
  • TIDA-00701—100W, 24V High Efficiency High PF Industrial Power Supply with Precision Current & Power Limit
    Design guide: PDF Schematic: PDF
  • TIDA-00702—60W, 24V High Efficiency Industrial Power Supply with Precision Voltage, Current and Power Limit
    Design guide: PDF Schematic: PDF

Technical documentation

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Type Title Date
White paper Four key design considerations when adding energy storage to solar power grids 19 Apr 2021
Analog Design Journal Cell balancing buys extra run time and battery life 17 Mar 2009
White paper 為太陽能電網增添儲能功能的四項 重要設計考量 13 May 2021
Application note Comparative Analysis of Two Different Methods for Gate-Drive Current Boosting (Rev. A) PDF | HTML 11 May 2022
Application note Power Topology Considerations for Solar String Inverters and Energy Storage Systems (Rev. A) PDF | HTML 05 Dec 2024

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